/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample FPandBPonlyIfFpWasNotPerfect -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.assert.codeblocks SMT_FEATURE_HEURISTIC --traceabstraction.assert.codeblocks.term.scoring.heuristic NUM_VARIABLES --traceabstraction.assert.codeblocks.term.scoring.heuristic.partitioning.strategy FIXED_NUM_PARTITIONS --traceabstraction.assert.codeblocks.term.scoring.heuristic.number.of.partitions 2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/ldv-linux-3.0/module_get_put-drivers-net-pppox.ko.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-d623d84 [2020-07-21 17:40:14,323 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-21 17:40:14,325 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-21 17:40:14,341 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-21 17:40:14,341 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-21 17:40:14,344 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-21 17:40:14,346 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-21 17:40:14,356 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-21 17:40:14,358 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-21 17:40:14,359 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-21 17:40:14,360 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-21 17:40:14,361 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-21 17:40:14,363 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-21 17:40:14,364 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-21 17:40:14,367 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-21 17:40:14,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-21 17:40:14,371 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-21 17:40:14,373 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-21 17:40:14,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-21 17:40:14,381 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-21 17:40:14,384 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-21 17:40:14,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-21 17:40:14,388 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-21 17:40:14,389 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-21 17:40:14,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-07-21 17:40:14,392 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-07-21 17:40:14,392 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-07-21 17:40:14,395 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-07-21 17:40:14,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-07-21 17:40:14,397 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-07-21 17:40:14,398 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-07-21 17:40:14,399 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-07-21 17:40:14,400 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-07-21 17:40:14,401 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-07-21 17:40:14,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-07-21 17:40:14,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-07-21 17:40:14,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-07-21 17:40:14,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-07-21 17:40:14,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-21 17:40:14,406 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-21 17:40:14,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-21 17:40:14,408 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-64bit-Automizer_Default.epf [2020-07-21 17:40:14,432 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-21 17:40:14,432 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-21 17:40:14,433 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-07-21 17:40:14,436 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-07-21 17:40:14,437 INFO L138 SettingsManager]: * Use SBE=true [2020-07-21 17:40:14,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-21 17:40:14,437 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-21 17:40:14,437 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-21 17:40:14,437 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-21 17:40:14,437 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-21 17:40:14,438 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-21 17:40:14,438 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-21 17:40:14,438 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-21 17:40:14,438 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-21 17:40:14,438 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-21 17:40:14,439 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-07-21 17:40:14,439 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-21 17:40:14,439 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-21 17:40:14,439 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:40:14,439 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-21 17:40:14,440 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-07-21 17:40:14,440 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-07-21 17:40:14,440 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-07-21 17:40:14,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:40:14,440 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-21 17:40:14,441 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-07-21 17:40:14,441 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-07-21 17:40:14,441 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 -> FPandBPonlyIfFpWasNotPerfect Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks -> SMT_FEATURE_HEURISTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic -> NUM_VARIABLES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic Partitioning Strategy -> FIXED_NUM_PARTITIONS Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Assert CodeBlocks Term Scoring Heuristic number of partitions -> 2 [2020-07-21 17:40:14,717 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-21 17:40:14,730 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-21 17:40:14,734 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-21 17:40:14,735 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-21 17:40:14,736 INFO L275 PluginConnector]: CDTParser initialized [2020-07-21 17:40:14,736 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-3.0/module_get_put-drivers-net-pppox.ko.cil.out.i [2020-07-21 17:40:14,799 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ad9a07b5/7e7e29eef4344676b48eadd51e37656f/FLAGe67e46eac [2020-07-21 17:40:15,538 INFO L306 CDTParser]: Found 1 translation units. [2020-07-21 17:40:15,539 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-3.0/module_get_put-drivers-net-pppox.ko.cil.out.i [2020-07-21 17:40:15,568 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ad9a07b5/7e7e29eef4344676b48eadd51e37656f/FLAGe67e46eac [2020-07-21 17:40:15,645 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ad9a07b5/7e7e29eef4344676b48eadd51e37656f [2020-07-21 17:40:15,653 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-21 17:40:15,656 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-21 17:40:15,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-21 17:40:15,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-21 17:40:15,660 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-21 17:40:15,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:40:15" (1/1) ... [2020-07-21 17:40:15,667 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5034d5f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:40:15, skipping insertion in model container [2020-07-21 17:40:15,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.07 05:40:15" (1/1) ... [2020-07-21 17:40:15,674 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-21 17:40:15,769 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-21 17:40:16,684 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:40:16,700 INFO L203 MainTranslator]: Completed pre-run [2020-07-21 17:40:16,872 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-21 17:40:16,910 INFO L208 MainTranslator]: Completed translation [2020-07-21 17:40:16,911 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:40:16 WrapperNode [2020-07-21 17:40:16,918 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-21 17:40:16,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-21 17:40:16,919 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-21 17:40:16,919 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-21 17:40:16,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:40:16" (1/1) ... [2020-07-21 17:40:16,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:40:16" (1/1) ... [2020-07-21 17:40:16,980 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:40:16" (1/1) ... [2020-07-21 17:40:16,981 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:40:16" (1/1) ... [2020-07-21 17:40:17,027 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:40:16" (1/1) ... [2020-07-21 17:40:17,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:40:16" (1/1) ... [2020-07-21 17:40:17,049 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:40:16" (1/1) ... [2020-07-21 17:40:17,063 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-21 17:40:17,064 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-21 17:40:17,064 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-21 17:40:17,064 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-21 17:40:17,067 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:40:16" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-21 17:40:17,154 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-21 17:40:17,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-21 17:40:17,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2020-07-21 17:40:17,155 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2020-07-21 17:40:17,155 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_sock [2020-07-21 17:40:17,155 INFO L138 BoogieDeclarations]: Found implementation of procedure pppox_sk [2020-07-21 17:40:17,156 INFO L138 BoogieDeclarations]: Found implementation of procedure register_pppox_proto [2020-07-21 17:40:17,156 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_pppox_proto [2020-07-21 17:40:17,156 INFO L138 BoogieDeclarations]: Found implementation of procedure pppox_unbind_sock [2020-07-21 17:40:17,157 INFO L138 BoogieDeclarations]: Found implementation of procedure pppox_ioctl [2020-07-21 17:40:17,157 INFO L138 BoogieDeclarations]: Found implementation of procedure pppox_create [2020-07-21 17:40:17,157 INFO L138 BoogieDeclarations]: Found implementation of procedure pppox_init [2020-07-21 17:40:17,158 INFO L138 BoogieDeclarations]: Found implementation of procedure pppox_exit [2020-07-21 17:40:17,158 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-21 17:40:17,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_blast_assert [2020-07-21 17:40:17,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_get [2020-07-21 17:40:17,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get [2020-07-21 17:40:17,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2020-07-21 17:40:17,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put_and_exit [2020-07-21 17:40:17,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_refcount [2020-07-21 17:40:17,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2020-07-21 17:40:17,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get_1 [2020-07-21 17:40:17,160 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put_2 [2020-07-21 17:40:17,161 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_module [2020-07-21 17:40:17,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2020-07-21 17:40:17,161 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undefined_int [2020-07-21 17:40:17,161 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_sock_nested [2020-07-21 17:40:17,162 INFO L138 BoogieDeclarations]: Found implementation of procedure might_fault [2020-07-21 17:40:17,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_channel_index [2020-07-21 17:40:17,162 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_unregister_channel [2020-07-21 17:40:17,162 INFO L138 BoogieDeclarations]: Found implementation of procedure release_sock [2020-07-21 17:40:17,162 INFO L138 BoogieDeclarations]: Found implementation of procedure sock_register [2020-07-21 17:40:17,162 INFO L138 BoogieDeclarations]: Found implementation of procedure sock_unregister [2020-07-21 17:40:17,163 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2020-07-21 17:40:17,163 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-21 17:40:17,163 INFO L130 BoogieDeclarations]: Found specification of procedure might_fault [2020-07-21 17:40:17,163 INFO L130 BoogieDeclarations]: Found specification of procedure __request_module [2020-07-21 17:40:17,163 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get_1 [2020-07-21 17:40:17,163 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put_2 [2020-07-21 17:40:17,163 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get [2020-07-21 17:40:17,164 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_get [2020-07-21 17:40:17,164 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2020-07-21 17:40:17,164 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_refcount [2020-07-21 17:40:17,164 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put_and_exit [2020-07-21 17:40:17,164 INFO L130 BoogieDeclarations]: Found specification of procedure sock_register [2020-07-21 17:40:17,164 INFO L130 BoogieDeclarations]: Found specification of procedure sock_unregister [2020-07-21 17:40:17,164 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_unregister_channel [2020-07-21 17:40:17,164 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_channel_index [2020-07-21 17:40:17,165 INFO L130 BoogieDeclarations]: Found specification of procedure lock_sock_nested [2020-07-21 17:40:17,165 INFO L130 BoogieDeclarations]: Found specification of procedure lock_sock [2020-07-21 17:40:17,165 INFO L130 BoogieDeclarations]: Found specification of procedure release_sock [2020-07-21 17:40:17,165 INFO L130 BoogieDeclarations]: Found specification of procedure pppox_sk [2020-07-21 17:40:17,165 INFO L130 BoogieDeclarations]: Found specification of procedure register_pppox_proto [2020-07-21 17:40:17,165 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_pppox_proto [2020-07-21 17:40:17,165 INFO L130 BoogieDeclarations]: Found specification of procedure pppox_unbind_sock [2020-07-21 17:40:17,166 INFO L130 BoogieDeclarations]: Found specification of procedure pppox_ioctl [2020-07-21 17:40:17,166 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-07-21 17:40:17,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-07-21 17:40:17,167 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-07-21 17:40:17,167 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-07-21 17:40:17,168 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2020-07-21 17:40:17,168 INFO L130 BoogieDeclarations]: Found specification of procedure pppox_create [2020-07-21 17:40:17,168 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-07-21 17:40:17,168 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~TO~int [2020-07-21 17:40:17,168 INFO L130 BoogieDeclarations]: Found specification of procedure pppox_init [2020-07-21 17:40:17,169 INFO L130 BoogieDeclarations]: Found specification of procedure pppox_exit [2020-07-21 17:40:17,169 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2020-07-21 17:40:17,169 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2020-07-21 17:40:17,169 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-21 17:40:17,169 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-21 17:40:17,169 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_blast_assert [2020-07-21 17:40:17,169 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undefined_int [2020-07-21 17:40:17,170 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-07-21 17:40:17,170 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2020-07-21 17:40:17,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-07-21 17:40:17,171 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-21 17:40:17,171 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2020-07-21 17:40:17,172 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-07-21 17:40:17,172 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-21 17:40:17,575 WARN L775 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-07-21 17:40:17,660 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##9: assume false; [2020-07-21 17:40:17,661 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##10: assume !false; [2020-07-21 17:40:17,661 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##4: assume !false; [2020-07-21 17:40:17,661 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##3: assume false; [2020-07-21 17:40:17,662 WARN L775 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2020-07-21 17:40:17,723 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##5: assume false; [2020-07-21 17:40:17,724 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##6: assume !false; [2020-07-21 17:40:17,859 INFO L728 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_module_put_and_exitFINAL: assume true; [2020-07-21 17:40:17,985 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-21 17:40:17,986 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-07-21 17:40:17,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:40:17 BoogieIcfgContainer [2020-07-21 17:40:17,990 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-21 17:40:17,992 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-21 17:40:17,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-21 17:40:17,995 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-21 17:40:17,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.07 05:40:15" (1/3) ... [2020-07-21 17:40:17,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c6a4a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:40:17, skipping insertion in model container [2020-07-21 17:40:17,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.07 05:40:16" (2/3) ... [2020-07-21 17:40:17,997 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40c6a4a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.07 05:40:17, skipping insertion in model container [2020-07-21 17:40:17,997 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.07 05:40:17" (3/3) ... [2020-07-21 17:40:17,999 INFO L109 eAbstractionObserver]: Analyzing ICFG module_get_put-drivers-net-pppox.ko.cil.out.i [2020-07-21 17:40:18,009 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBPonlyIfFpWasNotPerfect Determinization: PREDICATE_ABSTRACTION [2020-07-21 17:40:18,017 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-21 17:40:18,032 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-21 17:40:18,056 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-21 17:40:18,057 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-21 17:40:18,057 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBPonlyIfFpWasNotPerfect [2020-07-21 17:40:18,057 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-21 17:40:18,057 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-21 17:40:18,057 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-21 17:40:18,058 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-21 17:40:18,058 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-21 17:40:18,078 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states. [2020-07-21 17:40:18,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-21 17:40:18,084 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:40:18,084 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] [2020-07-21 17:40:18,085 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:40:18,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:40:18,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1611807670, now seen corresponding path program 1 times [2020-07-21 17:40:18,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:40:18,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [281523308] [2020-07-21 17:40:18,097 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:40:18,306 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:40:18,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:40:18,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 17:40:18,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:40:18,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:40:18,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:40:18,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [281523308] [2020-07-21 17:40:18,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:40:18,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-07-21 17:40:18,361 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646838401] [2020-07-21 17:40:18,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-07-21 17:40:18,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:40:18,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-07-21 17:40:18,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:40:18,386 INFO L87 Difference]: Start difference. First operand 93 states. Second operand 3 states. [2020-07-21 17:40:18,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:40:18,467 INFO L93 Difference]: Finished difference Result 223 states and 274 transitions. [2020-07-21 17:40:18,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-07-21 17:40:18,469 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-07-21 17:40:18,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:40:18,483 INFO L225 Difference]: With dead ends: 223 [2020-07-21 17:40:18,483 INFO L226 Difference]: Without dead ends: 135 [2020-07-21 17:40:18,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-07-21 17:40:18,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-07-21 17:40:18,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2020-07-21 17:40:18,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-07-21 17:40:18,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 154 transitions. [2020-07-21 17:40:18,558 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 154 transitions. Word has length 24 [2020-07-21 17:40:18,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:40:18,559 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 154 transitions. [2020-07-21 17:40:18,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-07-21 17:40:18,559 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 154 transitions. [2020-07-21 17:40:18,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-21 17:40:18,563 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:40:18,563 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] [2020-07-21 17:40:18,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:40:18,777 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:40:18,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:40:18,779 INFO L82 PathProgramCache]: Analyzing trace with hash 321457227, now seen corresponding path program 1 times [2020-07-21 17:40:18,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:40:18,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809131441] [2020-07-21 17:40:18,780 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:40:18,937 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:40:18,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:40:18,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 13 conjunts are in the unsatisfiable core [2020-07-21 17:40:18,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:40:18,995 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:40:18,996 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:40:18,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809131441] [2020-07-21 17:40:18,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:40:18,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 17:40:18,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105099390] [2020-07-21 17:40:18,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 17:40:18,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:40:19,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 17:40:19,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 17:40:19,001 INFO L87 Difference]: Start difference. First operand 132 states and 154 transitions. Second operand 7 states. [2020-07-21 17:40:19,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:40:19,055 INFO L93 Difference]: Finished difference Result 241 states and 288 transitions. [2020-07-21 17:40:19,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 17:40:19,056 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 56 [2020-07-21 17:40:19,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:40:19,061 INFO L225 Difference]: With dead ends: 241 [2020-07-21 17:40:19,062 INFO L226 Difference]: Without dead ends: 129 [2020-07-21 17:40:19,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 17:40:19,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-07-21 17:40:19,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 123. [2020-07-21 17:40:19,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-07-21 17:40:19,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 143 transitions. [2020-07-21 17:40:19,083 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 143 transitions. Word has length 56 [2020-07-21 17:40:19,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:40:19,084 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 143 transitions. [2020-07-21 17:40:19,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 17:40:19,084 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 143 transitions. [2020-07-21 17:40:19,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-21 17:40:19,087 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:40:19,087 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, 1, 1, 1, 1] [2020-07-21 17:40:19,301 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:40:19,302 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:40:19,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:40:19,302 INFO L82 PathProgramCache]: Analyzing trace with hash 751196711, now seen corresponding path program 1 times [2020-07-21 17:40:19,303 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:40:19,304 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404295828] [2020-07-21 17:40:19,304 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:40:19,469 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 1 check-sat command(s) [2020-07-21 17:40:19,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:40:19,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjunts are in the unsatisfiable core [2020-07-21 17:40:19,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:40:19,604 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 19 [2020-07-21 17:40:19,605 INFO L544 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-07-21 17:40:19,613 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 17:40:19,616 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 11 [2020-07-21 17:40:19,617 INFO L544 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-07-21 17:40:19,622 INFO L624 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-07-21 17:40:19,623 INFO L544 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-07-21 17:40:19,623 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:46, output treesize:7 [2020-07-21 17:40:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:40:19,667 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:40:19,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404295828] [2020-07-21 17:40:19,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:40:19,668 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-21 17:40:19,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435305448] [2020-07-21 17:40:19,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-21 17:40:19,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:40:19,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-21 17:40:19,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-21 17:40:19,671 INFO L87 Difference]: Start difference. First operand 123 states and 143 transitions. Second operand 5 states. [2020-07-21 17:40:19,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:40:19,780 INFO L93 Difference]: Finished difference Result 236 states and 281 transitions. [2020-07-21 17:40:19,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-21 17:40:19,780 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 62 [2020-07-21 17:40:19,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:40:19,783 INFO L225 Difference]: With dead ends: 236 [2020-07-21 17:40:19,783 INFO L226 Difference]: Without dead ends: 133 [2020-07-21 17:40:19,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 17:40:19,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-07-21 17:40:19,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 130. [2020-07-21 17:40:19,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-07-21 17:40:19,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 150 transitions. [2020-07-21 17:40:19,800 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 150 transitions. Word has length 62 [2020-07-21 17:40:19,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:40:19,800 INFO L479 AbstractCegarLoop]: Abstraction has 130 states and 150 transitions. [2020-07-21 17:40:19,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-21 17:40:19,801 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 150 transitions. [2020-07-21 17:40:19,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-07-21 17:40:19,803 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:40:19,803 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, 1, 1, 1, 1] [2020-07-21 17:40:20,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:40:20,018 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:40:20,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:40:20,018 INFO L82 PathProgramCache]: Analyzing trace with hash -1492786587, now seen corresponding path program 1 times [2020-07-21 17:40:20,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:40:20,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259928701] [2020-07-21 17:40:20,019 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:40:20,148 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:40:20,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:40:20,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 15 conjunts are in the unsatisfiable core [2020-07-21 17:40:20,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:40:20,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:40:20,212 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:40:20,212 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259928701] [2020-07-21 17:40:20,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:40:20,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-07-21 17:40:20,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916069570] [2020-07-21 17:40:20,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-21 17:40:20,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:40:20,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-21 17:40:20,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-21 17:40:20,214 INFO L87 Difference]: Start difference. First operand 130 states and 150 transitions. Second operand 6 states. [2020-07-21 17:40:20,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:40:20,567 INFO L93 Difference]: Finished difference Result 198 states and 237 transitions. [2020-07-21 17:40:20,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-21 17:40:20,573 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 62 [2020-07-21 17:40:20,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:40:20,575 INFO L225 Difference]: With dead ends: 198 [2020-07-21 17:40:20,576 INFO L226 Difference]: Without dead ends: 195 [2020-07-21 17:40:20,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-07-21 17:40:20,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-07-21 17:40:20,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 129. [2020-07-21 17:40:20,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-21 17:40:20,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 148 transitions. [2020-07-21 17:40:20,618 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 148 transitions. Word has length 62 [2020-07-21 17:40:20,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:40:20,619 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 148 transitions. [2020-07-21 17:40:20,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-21 17:40:20,619 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 148 transitions. [2020-07-21 17:40:20,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-07-21 17:40:20,628 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:40:20,628 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-21 17:40:20,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:40:20,829 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:40:20,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:40:20,830 INFO L82 PathProgramCache]: Analyzing trace with hash 899241760, now seen corresponding path program 1 times [2020-07-21 17:40:20,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:40:20,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639505935] [2020-07-21 17:40:20,831 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:40:20,952 INFO L228 tOrderPrioritization]: Assert order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) issued 2 check-sat command(s) [2020-07-21 17:40:20,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-07-21 17:40:20,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 7 conjunts are in the unsatisfiable core [2020-07-21 17:40:20,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-07-21 17:40:21,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-21 17:40:21,004 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-07-21 17:40:21,004 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639505935] [2020-07-21 17:40:21,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-21 17:40:21,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-07-21 17:40:21,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183881625] [2020-07-21 17:40:21,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-21 17:40:21,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-21 17:40:21,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-21 17:40:21,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 17:40:21,007 INFO L87 Difference]: Start difference. First operand 129 states and 148 transitions. Second operand 7 states. [2020-07-21 17:40:21,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-21 17:40:21,041 INFO L93 Difference]: Finished difference Result 203 states and 233 transitions. [2020-07-21 17:40:21,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-21 17:40:21,041 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 66 [2020-07-21 17:40:21,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-21 17:40:21,043 INFO L225 Difference]: With dead ends: 203 [2020-07-21 17:40:21,043 INFO L226 Difference]: Without dead ends: 129 [2020-07-21 17:40:21,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-07-21 17:40:21,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-07-21 17:40:21,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2020-07-21 17:40:21,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-07-21 17:40:21,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 147 transitions. [2020-07-21 17:40:21,058 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 147 transitions. Word has length 66 [2020-07-21 17:40:21,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-21 17:40:21,059 INFO L479 AbstractCegarLoop]: Abstraction has 129 states and 147 transitions. [2020-07-21 17:40:21,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-21 17:40:21,059 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 147 transitions. [2020-07-21 17:40:21,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-07-21 17:40:21,061 INFO L414 BasicCegarLoop]: Found error trace [2020-07-21 17:40:21,061 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-07-21 17:40:21,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-07-21 17:40:21,276 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ldv_blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-21 17:40:21,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-21 17:40:21,276 INFO L82 PathProgramCache]: Analyzing trace with hash 275916027, now seen corresponding path program 1 times [2020-07-21 17:40:21,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-21 17:40:21,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363731166] [2020-07-21 17:40:21,277 INFO L95 rtionOrderModulation]: Keeping assertion order SMT_FEATURE_HEURISTIC (partitioning type FIXED_NUM_PARTITIONS, 2 partitions) No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in