java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--ppp--pppox.ko-entry_point.cil.out.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 11:08:34,952 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 11:08:34,956 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 11:08:34,976 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 11:08:34,977 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 11:08:34,979 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 11:08:34,981 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 11:08:34,992 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 11:08:34,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 11:08:35,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 11:08:35,001 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 11:08:35,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 11:08:35,004 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 11:08:35,006 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 11:08:35,009 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 11:08:35,011 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 11:08:35,013 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 11:08:35,013 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 11:08:35,015 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 11:08:35,021 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 11:08:35,027 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 11:08:35,030 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 11:08:35,033 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 11:08:35,034 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 11:08:35,036 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-07 11:08:35,036 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-07 11:08:35,036 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-07 11:08:35,038 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-07 11:08:35,040 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-07 11:08:35,041 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-07 11:08:35,042 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 11:08:35,044 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 11:08:35,045 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 11:08:35,045 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 11:08:35,047 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 11:08:35,048 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 11:08:35,049 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 11:08:35,049 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 11:08:35,049 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 11:08:35,050 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 11:08:35,051 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 11:08:35,052 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-07 11:08:35,089 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 11:08:35,089 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 11:08:35,094 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 11:08:35,094 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 11:08:35,097 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 11:08:35,098 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 11:08:35,098 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 11:08:35,098 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 11:08:35,098 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 11:08:35,099 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 11:08:35,099 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 11:08:35,099 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 11:08:35,099 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 11:08:35,099 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 11:08:35,100 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 11:08:35,100 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 11:08:35,100 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 11:08:35,102 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 11:08:35,103 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 11:08:35,103 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 11:08:35,103 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 11:08:35,103 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 11:08:35,103 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 11:08:35,104 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 11:08:35,104 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 11:08:35,104 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 11:08:35,104 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 11:08:35,104 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 11:08:35,105 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-07 11:08:35,431 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 11:08:35,454 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 11:08:35,458 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 11:08:35,459 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 11:08:35,459 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 11:08:35,460 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--ppp--pppox.ko-entry_point.cil.out.i [2019-10-07 11:08:35,527 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9209bdd7b/9a3de5d9bd0548dda8b4fe55316a46b1/FLAG3c662944e [2019-10-07 11:08:36,301 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 11:08:36,302 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/ldv-linux-4.2-rc1/linux-4.2-rc1.tar.xz-08_1a-drivers--net--ppp--pppox.ko-entry_point.cil.out.i [2019-10-07 11:08:36,354 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9209bdd7b/9a3de5d9bd0548dda8b4fe55316a46b1/FLAG3c662944e [2019-10-07 11:08:36,399 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9209bdd7b/9a3de5d9bd0548dda8b4fe55316a46b1 [2019-10-07 11:08:36,411 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 11:08:36,414 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 11:08:36,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 11:08:36,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 11:08:36,425 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 11:08:36,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 11:08:36" (1/1) ... [2019-10-07 11:08:36,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@740f5482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:08:36, skipping insertion in model container [2019-10-07 11:08:36,430 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 11:08:36" (1/1) ... [2019-10-07 11:08:36,439 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 11:08:36,571 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 11:08:37,910 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 11:08:37,963 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 11:08:38,177 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 11:08:38,239 INFO L192 MainTranslator]: Completed translation [2019-10-07 11:08:38,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:08:38 WrapperNode [2019-10-07 11:08:38,240 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 11:08:38,241 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 11:08:38,241 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 11:08:38,241 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 11:08:38,265 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:08:38" (1/1) ... [2019-10-07 11:08:38,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:08:38" (1/1) ... [2019-10-07 11:08:38,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:08:38" (1/1) ... [2019-10-07 11:08:38,328 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:08:38" (1/1) ... [2019-10-07 11:08:38,418 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:08:38" (1/1) ... [2019-10-07 11:08:38,435 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:08:38" (1/1) ... [2019-10-07 11:08:38,460 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:08:38" (1/1) ... [2019-10-07 11:08:38,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 11:08:38,483 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 11:08:38,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 11:08:38,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 11:08:38,485 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:08:38" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 11:08:38,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 11:08:38,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 11:08:38,572 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2019-10-07 11:08:38,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2019-10-07 11:08:38,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_malloc [2019-10-07 11:08:38,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_zalloc [2019-10-07 11:08:38,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_init_zalloc [2019-10-07 11:08:38,576 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_memset [2019-10-07 11:08:38,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_int [2019-10-07 11:08:38,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ptr [2019-10-07 11:08:38,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_undef_ulong [2019-10-07 11:08:38,577 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_stop [2019-10-07 11:08:38,578 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_sock [2019-10-07 11:08:38,578 INFO L138 BoogieDeclarations]: Found implementation of procedure pppox_sk [2019-10-07 11:08:38,578 INFO L138 BoogieDeclarations]: Found implementation of procedure register_pppox_proto [2019-10-07 11:08:38,578 INFO L138 BoogieDeclarations]: Found implementation of procedure unregister_pppox_proto [2019-10-07 11:08:38,579 INFO L138 BoogieDeclarations]: Found implementation of procedure pppox_unbind_sock [2019-10-07 11:08:38,579 INFO L138 BoogieDeclarations]: Found implementation of procedure pppox_ioctl [2019-10-07 11:08:38,579 INFO L138 BoogieDeclarations]: Found implementation of procedure pppox_create [2019-10-07 11:08:38,579 INFO L138 BoogieDeclarations]: Found implementation of procedure pppox_init [2019-10-07 11:08:38,580 INFO L138 BoogieDeclarations]: Found implementation of procedure pppox_exit [2019-10-07 11:08:38,580 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 11:08:38,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get_5 [2019-10-07 11:08:38,580 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put_6 [2019-10-07 11:08:38,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_error [2019-10-07 11:08:38,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err [2019-10-07 11:08:38,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_err_ptr [2019-10-07 11:08:38,581 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_ptr_err [2019-10-07 11:08:38,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_err_or_null [2019-10-07 11:08:38,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_get [2019-10-07 11:08:38,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_try_module_get [2019-10-07 11:08:38,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put [2019-10-07 11:08:38,582 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_put_and_exit [2019-10-07 11:08:38,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_module_refcount [2019-10-07 11:08:38,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_check_final_state [2019-10-07 11:08:38,583 INFO L138 BoogieDeclarations]: Found implementation of procedure __might_fault [2019-10-07 11:08:38,583 INFO L138 BoogieDeclarations]: Found implementation of procedure __request_module [2019-10-07 11:08:38,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_initialize [2019-10-07 11:08:38,640 INFO L138 BoogieDeclarations]: Found implementation of procedure lock_sock_nested [2019-10-07 11:08:38,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_channel_index [2019-10-07 11:08:38,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ppp_unregister_channel [2019-10-07 11:08:38,640 INFO L138 BoogieDeclarations]: Found implementation of procedure release_sock [2019-10-07 11:08:38,641 INFO L138 BoogieDeclarations]: Found implementation of procedure sock_register [2019-10-07 11:08:38,641 INFO L138 BoogieDeclarations]: Found implementation of procedure sock_unregister [2019-10-07 11:08:38,641 INFO L138 BoogieDeclarations]: Found implementation of procedure external_alloc [2019-10-07 11:08:38,641 INFO L138 BoogieDeclarations]: Found implementation of procedure kfree [2019-10-07 11:08:38,641 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2019-10-07 11:08:38,641 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.meminit [2019-10-07 11:08:38,642 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 11:08:38,642 INFO L130 BoogieDeclarations]: Found specification of procedure __might_fault [2019-10-07 11:08:38,642 INFO L130 BoogieDeclarations]: Found specification of procedure memset [2019-10-07 11:08:38,642 INFO L130 BoogieDeclarations]: Found specification of procedure __request_module [2019-10-07 11:08:38,642 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get_5 [2019-10-07 11:08:38,642 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put_6 [2019-10-07 11:08:38,643 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_try_module_get [2019-10-07 11:08:38,643 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put [2019-10-07 11:08:38,643 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2019-10-07 11:08:38,643 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2019-10-07 11:08:38,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 11:08:38,643 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_ulong [2019-10-07 11:08:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_pointer [2019-10-07 11:08:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assume [2019-10-07 11:08:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_malloc [2019-10-07 11:08:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-10-07 11:08:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_zalloc [2019-10-07 11:08:38,644 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.meminit [2019-10-07 11:08:38,645 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_init_zalloc [2019-10-07 11:08:38,645 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_memset [2019-10-07 11:08:38,645 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2019-10-07 11:08:38,645 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_int [2019-10-07 11:08:38,645 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ptr [2019-10-07 11:08:38,645 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_undef_ulong [2019-10-07 11:08:38,645 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_stop [2019-10-07 11:08:38,646 INFO L130 BoogieDeclarations]: Found specification of procedure sock_register [2019-10-07 11:08:38,646 INFO L130 BoogieDeclarations]: Found specification of procedure sock_unregister [2019-10-07 11:08:38,646 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_unregister_channel [2019-10-07 11:08:38,648 INFO L130 BoogieDeclarations]: Found specification of procedure ppp_channel_index [2019-10-07 11:08:38,648 INFO L130 BoogieDeclarations]: Found specification of procedure lock_sock_nested [2019-10-07 11:08:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure lock_sock [2019-10-07 11:08:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure release_sock [2019-10-07 11:08:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure pppox_sk [2019-10-07 11:08:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure register_pppox_proto [2019-10-07 11:08:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure unregister_pppox_proto [2019-10-07 11:08:38,649 INFO L130 BoogieDeclarations]: Found specification of procedure pppox_unbind_sock [2019-10-07 11:08:38,650 INFO L130 BoogieDeclarations]: Found specification of procedure pppox_ioctl [2019-10-07 11:08:38,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2019-10-07 11:08:38,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2019-10-07 11:08:38,650 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-10-07 11:08:38,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-10-07 11:08:38,650 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-10-07 11:08:38,650 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~int~X~int~TO~int [2019-10-07 11:08:38,651 INFO L130 BoogieDeclarations]: Found specification of procedure pppox_create [2019-10-07 11:08:38,651 INFO L130 BoogieDeclarations]: Found specification of procedure ##fun~$Pointer$~X~$Pointer$~X~int~TO~int [2019-10-07 11:08:38,651 INFO L130 BoogieDeclarations]: Found specification of procedure pppox_init [2019-10-07 11:08:38,651 INFO L130 BoogieDeclarations]: Found specification of procedure pppox_exit [2019-10-07 11:08:38,653 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_initialize [2019-10-07 11:08:38,653 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_check_final_state [2019-10-07 11:08:38,654 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 11:08:38,654 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-10-07 11:08:38,654 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_error [2019-10-07 11:08:38,654 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err [2019-10-07 11:08:38,654 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_err_ptr [2019-10-07 11:08:38,654 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_ptr_err [2019-10-07 11:08:38,654 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_err_or_null [2019-10-07 11:08:38,655 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_get [2019-10-07 11:08:38,655 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_put_and_exit [2019-10-07 11:08:38,655 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_module_refcount [2019-10-07 11:08:38,655 INFO L130 BoogieDeclarations]: Found specification of procedure external_alloc [2019-10-07 11:08:38,655 INFO L130 BoogieDeclarations]: Found specification of procedure free [2019-10-07 11:08:38,655 INFO L130 BoogieDeclarations]: Found specification of procedure kfree [2019-10-07 11:08:38,655 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 11:08:38,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2019-10-07 11:08:38,656 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2019-10-07 11:08:38,656 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 11:08:39,445 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_stopFINAL: assume true; [2019-10-07 11:08:39,485 INFO L685 $ProcedureCfgBuilder]: dead code at ProgramPoint ldv_module_put_and_exitFINAL: assume true; [2019-10-07 11:08:40,483 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 11:08:40,484 INFO L284 CfgBuilder]: Removed 0 assume(true) statements. [2019-10-07 11:08:40,485 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 11:08:40 BoogieIcfgContainer [2019-10-07 11:08:40,485 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 11:08:40,487 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 11:08:40,487 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 11:08:40,490 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 11:08:40,491 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 11:08:36" (1/3) ... [2019-10-07 11:08:40,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f24116b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 11:08:40, skipping insertion in model container [2019-10-07 11:08:40,492 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 11:08:38" (2/3) ... [2019-10-07 11:08:40,492 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f24116b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 11:08:40, skipping insertion in model container [2019-10-07 11:08:40,493 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 11:08:40" (3/3) ... [2019-10-07 11:08:40,494 INFO L109 eAbstractionObserver]: Analyzing ICFG linux-4.2-rc1.tar.xz-08_1a-drivers--net--ppp--pppox.ko-entry_point.cil.out.i [2019-10-07 11:08:40,505 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 11:08:40,514 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 11:08:40,526 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 11:08:40,553 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 11:08:40,554 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 11:08:40,554 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 11:08:40,554 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 11:08:40,554 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 11:08:40,554 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 11:08:40,555 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 11:08:40,555 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 11:08:40,576 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states. [2019-10-07 11:08:40,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2019-10-07 11:08:40,586 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:08:40,587 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 11:08:40,590 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:08:40,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:08:40,596 INFO L82 PathProgramCache]: Analyzing trace with hash -275001595, now seen corresponding path program 1 times [2019-10-07 11:08:40,605 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:08:40,605 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:08:40,606 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:08:40,606 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:08:40,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:08:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:08:41,177 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-07 11:08:41,178 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:08:41,179 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 11:08:41,179 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 11:08:41,185 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 11:08:41,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 11:08:41,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 11:08:41,203 INFO L87 Difference]: Start difference. First operand 121 states. Second operand 3 states. [2019-10-07 11:08:41,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 11:08:41,347 INFO L93 Difference]: Finished difference Result 266 states and 339 transitions. [2019-10-07 11:08:41,350 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 11:08:41,353 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 59 [2019-10-07 11:08:41,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 11:08:41,378 INFO L225 Difference]: With dead ends: 266 [2019-10-07 11:08:41,378 INFO L226 Difference]: Without dead ends: 164 [2019-10-07 11:08:41,388 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 11:08:41,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2019-10-07 11:08:41,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 161. [2019-10-07 11:08:41,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-10-07 11:08:41,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 193 transitions. [2019-10-07 11:08:41,515 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 193 transitions. Word has length 59 [2019-10-07 11:08:41,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 11:08:41,518 INFO L462 AbstractCegarLoop]: Abstraction has 161 states and 193 transitions. [2019-10-07 11:08:41,518 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 11:08:41,518 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 193 transitions. [2019-10-07 11:08:41,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2019-10-07 11:08:41,526 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:08:41,526 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 11:08:41,527 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:08:41,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:08:41,527 INFO L82 PathProgramCache]: Analyzing trace with hash -1079033146, now seen corresponding path program 1 times [2019-10-07 11:08:41,528 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:08:41,528 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:08:41,528 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:08:41,528 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:08:41,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:08:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:08:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-07 11:08:41,777 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:08:41,777 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 11:08:41,777 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 11:08:41,787 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 11:08:41,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 11:08:41,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 11:08:41,788 INFO L87 Difference]: Start difference. First operand 161 states and 193 transitions. Second operand 3 states. [2019-10-07 11:08:41,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 11:08:41,847 INFO L93 Difference]: Finished difference Result 422 states and 524 transitions. [2019-10-07 11:08:41,848 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 11:08:41,848 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 62 [2019-10-07 11:08:41,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 11:08:41,853 INFO L225 Difference]: With dead ends: 422 [2019-10-07 11:08:41,854 INFO L226 Difference]: Without dead ends: 281 [2019-10-07 11:08:41,856 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 11:08:41,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2019-10-07 11:08:41,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 269. [2019-10-07 11:08:41,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2019-10-07 11:08:41,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 333 transitions. [2019-10-07 11:08:41,885 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 333 transitions. Word has length 62 [2019-10-07 11:08:41,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 11:08:41,886 INFO L462 AbstractCegarLoop]: Abstraction has 269 states and 333 transitions. [2019-10-07 11:08:41,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 11:08:41,886 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 333 transitions. [2019-10-07 11:08:41,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2019-10-07 11:08:41,889 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:08:41,889 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 11:08:41,889 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:08:41,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:08:41,890 INFO L82 PathProgramCache]: Analyzing trace with hash -2070860259, now seen corresponding path program 1 times [2019-10-07 11:08:41,890 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:08:41,890 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:08:41,890 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:08:41,891 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:08:41,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:08:41,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:08:42,009 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2019-10-07 11:08:42,010 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:08:42,010 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 11:08:42,010 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 11:08:42,011 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 11:08:42,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 11:08:42,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 11:08:42,012 INFO L87 Difference]: Start difference. First operand 269 states and 333 transitions. Second operand 3 states. [2019-10-07 11:08:42,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 11:08:42,063 INFO L93 Difference]: Finished difference Result 472 states and 588 transitions. [2019-10-07 11:08:42,063 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 11:08:42,063 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 74 [2019-10-07 11:08:42,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 11:08:42,068 INFO L225 Difference]: With dead ends: 472 [2019-10-07 11:08:42,069 INFO L226 Difference]: Without dead ends: 232 [2019-10-07 11:08:42,071 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 11:08:42,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2019-10-07 11:08:42,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 204. [2019-10-07 11:08:42,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2019-10-07 11:08:42,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 257 transitions. [2019-10-07 11:08:42,108 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 257 transitions. Word has length 74 [2019-10-07 11:08:42,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 11:08:42,111 INFO L462 AbstractCegarLoop]: Abstraction has 204 states and 257 transitions. [2019-10-07 11:08:42,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 11:08:42,111 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 257 transitions. [2019-10-07 11:08:42,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2019-10-07 11:08:42,117 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:08:42,119 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 11:08:42,120 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:08:42,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:08:42,120 INFO L82 PathProgramCache]: Analyzing trace with hash -1264345874, now seen corresponding path program 1 times [2019-10-07 11:08:42,120 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:08:42,121 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:08:42,121 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:08:42,121 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:08:42,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:08:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:08:42,473 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-07 11:08:42,474 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:08:42,475 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 11:08:42,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 11:08:42,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:08:42,768 INFO L256 TraceCheckSpWp]: Trace formula consists of 948 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-07 11:08:42,790 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 11:08:42,850 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:42,911 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-10-07 11:08:42,911 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 11:08:43,063 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:43,104 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:43,217 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2019-10-07 11:08:43,217 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 11:08:43,256 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 6] total 11 [2019-10-07 11:08:43,257 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-07 11:08:43,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-07 11:08:43,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2019-10-07 11:08:43,258 INFO L87 Difference]: Start difference. First operand 204 states and 257 transitions. Second operand 6 states. [2019-10-07 11:08:43,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 11:08:43,366 INFO L93 Difference]: Finished difference Result 393 states and 499 transitions. [2019-10-07 11:08:43,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-07 11:08:43,366 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 90 [2019-10-07 11:08:43,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 11:08:43,369 INFO L225 Difference]: With dead ends: 393 [2019-10-07 11:08:43,369 INFO L226 Difference]: Without dead ends: 205 [2019-10-07 11:08:43,370 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 173 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2019-10-07 11:08:43,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2019-10-07 11:08:43,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2019-10-07 11:08:43,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-10-07 11:08:43,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 258 transitions. [2019-10-07 11:08:43,386 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 258 transitions. Word has length 90 [2019-10-07 11:08:43,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 11:08:43,387 INFO L462 AbstractCegarLoop]: Abstraction has 205 states and 258 transitions. [2019-10-07 11:08:43,387 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-07 11:08:43,387 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 258 transitions. [2019-10-07 11:08:43,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2019-10-07 11:08:43,390 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:08:43,390 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 11:08:43,591 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 11:08:43,591 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:08:43,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:08:43,592 INFO L82 PathProgramCache]: Analyzing trace with hash -785241068, now seen corresponding path program 1 times [2019-10-07 11:08:43,592 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:08:43,592 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:08:43,593 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:08:43,593 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:08:43,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:08:43,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:08:43,874 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-07 11:08:43,874 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:08:43,874 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 11:08:43,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 11:08:44,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:08:44,145 INFO L256 TraceCheckSpWp]: Trace formula consists of 960 conjuncts, 22 conjunts are in the unsatisfiable core [2019-10-07 11:08:44,151 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 11:08:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-07 11:08:44,270 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 11:08:44,390 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:44,511 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-07 11:08:44,512 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 11:08:44,512 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 8] total 16 [2019-10-07 11:08:44,514 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-07 11:08:44,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-07 11:08:44,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2019-10-07 11:08:44,516 INFO L87 Difference]: Start difference. First operand 205 states and 258 transitions. Second operand 7 states. [2019-10-07 11:08:44,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 11:08:44,605 INFO L93 Difference]: Finished difference Result 362 states and 464 transitions. [2019-10-07 11:08:44,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-07 11:08:44,608 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 92 [2019-10-07 11:08:44,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 11:08:44,613 INFO L225 Difference]: With dead ends: 362 [2019-10-07 11:08:44,613 INFO L226 Difference]: Without dead ends: 200 [2019-10-07 11:08:44,614 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2019-10-07 11:08:44,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2019-10-07 11:08:44,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 196. [2019-10-07 11:08:44,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2019-10-07 11:08:44,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 247 transitions. [2019-10-07 11:08:44,639 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 247 transitions. Word has length 92 [2019-10-07 11:08:44,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 11:08:44,640 INFO L462 AbstractCegarLoop]: Abstraction has 196 states and 247 transitions. [2019-10-07 11:08:44,640 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-07 11:08:44,641 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 247 transitions. [2019-10-07 11:08:44,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-10-07 11:08:44,649 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:08:44,649 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 11:08:44,866 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 11:08:44,866 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:08:44,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:08:44,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1325615096, now seen corresponding path program 1 times [2019-10-07 11:08:44,867 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:08:44,867 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:08:44,867 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:08:44,867 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:08:44,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:08:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:08:45,151 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2019-10-07 11:08:45,152 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:08:45,152 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 11:08:45,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 11:08:45,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:08:45,399 INFO L256 TraceCheckSpWp]: Trace formula consists of 973 conjuncts, 35 conjunts are in the unsatisfiable core [2019-10-07 11:08:45,405 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 11:08:45,465 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:45,495 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:45,534 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:45,573 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:45,613 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:45,697 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2019-10-07 11:08:45,697 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 11:08:46,016 WARN L191 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 23 [2019-10-07 11:08:46,195 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:46,197 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:46,199 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:46,200 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:46,243 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:46,421 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:46,422 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:46,425 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:46,427 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:46,460 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:46,488 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:46,511 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:46,643 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-07 11:08:46,644 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-07 11:08:46,644 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [7, 11] total 22 [2019-10-07 11:08:46,645 INFO L442 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-10-07 11:08:46,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-10-07 11:08:46,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2019-10-07 11:08:46,646 INFO L87 Difference]: Start difference. First operand 196 states and 247 transitions. Second operand 10 states. [2019-10-07 11:08:47,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 11:08:47,338 INFO L93 Difference]: Finished difference Result 283 states and 359 transitions. [2019-10-07 11:08:47,339 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-07 11:08:47,339 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 96 [2019-10-07 11:08:47,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 11:08:47,342 INFO L225 Difference]: With dead ends: 283 [2019-10-07 11:08:47,342 INFO L226 Difference]: Without dead ends: 280 [2019-10-07 11:08:47,343 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 171 SyntacticMatches, 7 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2019-10-07 11:08:47,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2019-10-07 11:08:47,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 269. [2019-10-07 11:08:47,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 269 states. [2019-10-07 11:08:47,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 345 transitions. [2019-10-07 11:08:47,361 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 345 transitions. Word has length 96 [2019-10-07 11:08:47,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 11:08:47,361 INFO L462 AbstractCegarLoop]: Abstraction has 269 states and 345 transitions. [2019-10-07 11:08:47,361 INFO L463 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-10-07 11:08:47,361 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 345 transitions. [2019-10-07 11:08:47,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-10-07 11:08:47,363 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:08:47,363 INFO L385 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 11:08:47,569 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 11:08:47,570 INFO L410 AbstractCegarLoop]: === Iteration 7 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:08:47,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:08:47,571 INFO L82 PathProgramCache]: Analyzing trace with hash 518329478, now seen corresponding path program 1 times [2019-10-07 11:08:47,571 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:08:47,571 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:08:47,571 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:08:47,572 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:08:47,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:08:47,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:08:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2019-10-07 11:08:48,063 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:08:48,063 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 11:08:48,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 11:08:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:08:48,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 943 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-07 11:08:48,359 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 11:08:48,423 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:48,427 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:48,491 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:48,492 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:48,493 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:48,528 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:48,543 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-07 11:08:48,543 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 11:08:48,951 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:49,242 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:49,244 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:49,310 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:49,528 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:49,544 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:49,680 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2019-10-07 11:08:49,681 INFO L211 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-07 11:08:49,681 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [9, 9] imperfect sequences [12] total 21 [2019-10-07 11:08:49,682 INFO L442 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-10-07 11:08:49,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-10-07 11:08:49,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=325, Unknown=0, NotChecked=0, Total=420 [2019-10-07 11:08:49,683 INFO L87 Difference]: Start difference. First operand 269 states and 345 transitions. Second operand 15 states. [2019-10-07 11:08:50,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 11:08:50,711 INFO L93 Difference]: Finished difference Result 352 states and 453 transitions. [2019-10-07 11:08:50,712 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-10-07 11:08:50,712 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 104 [2019-10-07 11:08:50,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 11:08:50,716 INFO L225 Difference]: With dead ends: 352 [2019-10-07 11:08:50,717 INFO L226 Difference]: Without dead ends: 340 [2019-10-07 11:08:50,718 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 201 SyntacticMatches, 5 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=257, Invalid=735, Unknown=0, NotChecked=0, Total=992 [2019-10-07 11:08:50,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2019-10-07 11:08:50,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 273. [2019-10-07 11:08:50,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2019-10-07 11:08:50,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 349 transitions. [2019-10-07 11:08:50,738 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 349 transitions. Word has length 104 [2019-10-07 11:08:50,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 11:08:50,739 INFO L462 AbstractCegarLoop]: Abstraction has 273 states and 349 transitions. [2019-10-07 11:08:50,739 INFO L463 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-10-07 11:08:50,739 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 349 transitions. [2019-10-07 11:08:50,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-10-07 11:08:50,741 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 11:08:50,742 INFO L385 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 11:08:50,947 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 11:08:50,948 INFO L410 AbstractCegarLoop]: === Iteration 8 === [ldv_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 11:08:50,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 11:08:50,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1189872881, now seen corresponding path program 1 times [2019-10-07 11:08:50,949 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 11:08:50,949 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:08:50,949 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:08:50,949 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 11:08:50,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 11:08:51,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:08:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-07 11:08:51,142 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 11:08:51,142 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 11:08:51,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 11:08:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 11:08:51,489 INFO L256 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 11 conjunts are in the unsatisfiable core [2019-10-07 11:08:51,493 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 11:08:51,585 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 10 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2019-10-07 11:08:51,586 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 11:08:51,770 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:51,805 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:51,806 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:51,807 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-10-07 11:08:57,971 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-07 11:08:58,091 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-10-07 11:08:58,092 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 11:08:58,120 INFO L162 IcfgInterpreter]: Started Sifa with 97 locations of interest [2019-10-07 11:08:58,120 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 11:08:58,125 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 11:08:58,132 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 11:08:58,132 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 11:08:58,504 WARN L191 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 455 [2019-10-07 11:08:59,111 WARN L191 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 486 [2019-10-07 11:08:59,418 WARN L191 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 486 [2019-10-07 11:08:59,617 WARN L191 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 488 DAG size of output: 486 [2019-10-07 11:08:59,744 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 486 [2019-10-07 11:08:59,943 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 486 [2019-10-07 11:09:00,268 WARN L191 SmtUtils]: Spent 322.00 ms on a formula simplification that was a NOOP. DAG size: 486 [2019-10-07 11:09:00,449 WARN L191 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 486 [2019-10-07 11:09:00,646 WARN L191 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 486 [2019-10-07 11:09:00,665 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 115 for LOIs [2019-10-07 11:09:00,917 WARN L191 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 449 [2019-10-07 11:09:01,093 WARN L191 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 489 [2019-10-07 11:09:01,095 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 498 for LOIs [2019-10-07 11:09:01,222 WARN L191 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 498 [2019-10-07 11:09:01,348 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 498 [2019-10-07 11:09:01,487 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 516 [2019-10-07 11:09:01,762 WARN L191 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 518 [2019-10-07 11:09:01,899 WARN L191 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 518 [2019-10-07 11:09:02,044 WARN L191 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 540 [2019-10-07 11:09:02,604 WARN L191 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2019-10-07 11:09:02,735 WARN L191 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 567 [2019-10-07 11:09:03,069 WARN L191 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 565 [2019-10-07 11:09:03,337 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 11:09:03,338 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:133) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:287) ... 21 more [2019-10-07 11:09:03,345 INFO L168 Benchmark]: Toolchain (without parser) took 26932.44 ms. Allocated memory was 137.9 MB in the beginning and 599.3 MB in the end (delta: 461.4 MB). Free memory was 94.7 MB in the beginning and 188.6 MB in the end (delta: -93.8 MB). Peak memory consumption was 367.5 MB. Max. memory is 7.1 GB. [2019-10-07 11:09:03,346 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 137.9 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 11:09:03,347 INFO L168 Benchmark]: CACSL2BoogieTranslator took 1820.16 ms. Allocated memory was 137.9 MB in the beginning and 209.7 MB in the end (delta: 71.8 MB). Free memory was 94.5 MB in the beginning and 103.2 MB in the end (delta: -8.7 MB). Peak memory consumption was 68.4 MB. Max. memory is 7.1 GB. [2019-10-07 11:09:03,347 INFO L168 Benchmark]: Boogie Preprocessor took 241.02 ms. Allocated memory is still 209.7 MB. Free memory was 103.2 MB in the beginning and 97.8 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 7.1 GB. [2019-10-07 11:09:03,348 INFO L168 Benchmark]: RCFGBuilder took 2003.04 ms. Allocated memory was 209.7 MB in the beginning and 269.5 MB in the end (delta: 59.8 MB). Free memory was 97.8 MB in the beginning and 217.3 MB in the end (delta: -119.5 MB). Peak memory consumption was 63.9 MB. Max. memory is 7.1 GB. [2019-10-07 11:09:03,349 INFO L168 Benchmark]: TraceAbstraction took 22856.16 ms. Allocated memory was 269.5 MB in the beginning and 599.3 MB in the end (delta: 329.8 MB). Free memory was 215.3 MB in the beginning and 188.6 MB in the end (delta: 26.7 MB). Peak memory consumption was 356.5 MB. Max. memory is 7.1 GB. [2019-10-07 11:09:03,353 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 137.9 MB. Free memory was 121.1 MB in the beginning and 120.9 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 1820.16 ms. Allocated memory was 137.9 MB in the beginning and 209.7 MB in the end (delta: 71.8 MB). Free memory was 94.5 MB in the beginning and 103.2 MB in the end (delta: -8.7 MB). Peak memory consumption was 68.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 241.02 ms. Allocated memory is still 209.7 MB. Free memory was 103.2 MB in the beginning and 97.8 MB in the end (delta: 5.4 MB). Peak memory consumption was 5.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 2003.04 ms. Allocated memory was 209.7 MB in the beginning and 269.5 MB in the end (delta: 59.8 MB). Free memory was 97.8 MB in the beginning and 217.3 MB in the end (delta: -119.5 MB). Peak memory consumption was 63.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 22856.16 ms. Allocated memory was 269.5 MB in the beginning and 599.3 MB in the end (delta: 329.8 MB). Free memory was 215.3 MB in the beginning and 188.6 MB in the end (delta: 26.7 MB). Peak memory consumption was 356.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...