./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ae007674 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5dc0e184171498e703ccf08545f4f79d3c1c383c8c0fc13a1f35990befb669a4 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-ae00767 [2021-12-27 23:47:41,951 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-27 23:47:41,952 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-27 23:47:41,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-27 23:47:41,986 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-27 23:47:41,987 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-27 23:47:41,989 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-27 23:47:41,990 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-27 23:47:41,991 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-27 23:47:41,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-27 23:47:41,993 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-27 23:47:41,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-27 23:47:41,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-27 23:47:41,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-27 23:47:41,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-27 23:47:41,997 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-27 23:47:41,998 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-27 23:47:41,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-27 23:47:42,000 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-27 23:47:42,001 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-27 23:47:42,002 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-27 23:47:42,003 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-27 23:47:42,004 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-27 23:47:42,005 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-27 23:47:42,007 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-27 23:47:42,007 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-27 23:47:42,008 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-27 23:47:42,009 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-27 23:47:42,009 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-27 23:47:42,010 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-27 23:47:42,010 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-27 23:47:42,011 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-27 23:47:42,012 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-27 23:47:42,012 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-27 23:47:42,013 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-27 23:47:42,014 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-27 23:47:42,014 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-27 23:47:42,014 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-27 23:47:42,015 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-27 23:47:42,015 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-27 23:47:42,016 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-27 23:47:42,017 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-27 23:47:42,036 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-27 23:47:42,036 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-27 23:47:42,036 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-27 23:47:42,036 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-27 23:47:42,037 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-27 23:47:42,037 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-27 23:47:42,038 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-27 23:47:42,038 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-27 23:47:42,038 INFO L138 SettingsManager]: * Use SBE=true [2021-12-27 23:47:42,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-27 23:47:42,039 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-27 23:47:42,039 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-27 23:47:42,039 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-27 23:47:42,039 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-27 23:47:42,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-27 23:47:42,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-27 23:47:42,040 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-27 23:47:42,040 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-27 23:47:42,040 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-27 23:47:42,041 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-27 23:47:42,041 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-27 23:47:42,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-27 23:47:42,041 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-27 23:47:42,041 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-27 23:47:42,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:47:42,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-27 23:47:42,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-27 23:47:42,042 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-27 23:47:42,043 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-27 23:47:42,043 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-27 23:47:42,043 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-27 23:47:42,043 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-27 23:47:42,043 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-27 23:47:42,044 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5dc0e184171498e703ccf08545f4f79d3c1c383c8c0fc13a1f35990befb669a4 [2021-12-27 23:47:42,352 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-27 23:47:42,369 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-27 23:47:42,371 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-27 23:47:42,372 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-27 23:47:42,373 INFO L275 PluginConnector]: CDTParser initialized [2021-12-27 23:47:42,374 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i [2021-12-27 23:47:42,421 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cccca71f7/db757563464a49e9bee9a9f71fb1c49a/FLAG77bef4979 [2021-12-27 23:47:42,874 INFO L306 CDTParser]: Found 1 translation units. [2021-12-27 23:47:42,874 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i [2021-12-27 23:47:42,898 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cccca71f7/db757563464a49e9bee9a9f71fb1c49a/FLAG77bef4979 [2021-12-27 23:47:43,407 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/cccca71f7/db757563464a49e9bee9a9f71fb1c49a [2021-12-27 23:47:43,410 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-27 23:47:43,413 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-27 23:47:43,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-27 23:47:43,418 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-27 23:47:43,429 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-27 23:47:43,430 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:47:43" (1/1) ... [2021-12-27 23:47:43,430 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@204c5376 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:47:43, skipping insertion in model container [2021-12-27 23:47:43,431 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.12 11:47:43" (1/1) ... [2021-12-27 23:47:43,436 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-27 23:47:43,478 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-27 23:47:43,628 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i[296,309] [2021-12-27 23:47:43,795 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:47:43,802 INFO L203 MainTranslator]: Completed pre-run [2021-12-27 23:47:43,813 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/ldv-regression/rule60_list2.c_1.i[296,309] [2021-12-27 23:47:43,853 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-27 23:47:43,882 INFO L208 MainTranslator]: Completed translation [2021-12-27 23:47:43,882 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:47:43 WrapperNode [2021-12-27 23:47:43,882 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-27 23:47:43,883 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-27 23:47:43,884 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-27 23:47:43,884 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-27 23:47:43,889 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:47:43" (1/1) ... [2021-12-27 23:47:43,911 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:47:43" (1/1) ... [2021-12-27 23:47:43,932 INFO L137 Inliner]: procedures = 126, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 54 [2021-12-27 23:47:43,933 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-27 23:47:43,934 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-27 23:47:43,934 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-27 23:47:43,934 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-27 23:47:43,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:47:43" (1/1) ... [2021-12-27 23:47:43,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:47:43" (1/1) ... [2021-12-27 23:47:43,951 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:47:43" (1/1) ... [2021-12-27 23:47:43,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:47:43" (1/1) ... [2021-12-27 23:47:43,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:47:43" (1/1) ... [2021-12-27 23:47:43,964 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:47:43" (1/1) ... [2021-12-27 23:47:43,966 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:47:43" (1/1) ... [2021-12-27 23:47:43,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-27 23:47:43,971 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-27 23:47:43,971 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-27 23:47:43,971 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-27 23:47:43,972 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:47:43" (1/1) ... [2021-12-27 23:47:43,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-27 23:47:43,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:47:44,000 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-27 23:47:44,027 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-27 23:47:44,050 INFO L130 BoogieDeclarations]: Found specification of procedure my_malloc [2021-12-27 23:47:44,050 INFO L138 BoogieDeclarations]: Found implementation of procedure my_malloc [2021-12-27 23:47:44,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-27 23:47:44,051 INFO L130 BoogieDeclarations]: Found specification of procedure list_add [2021-12-27 23:47:44,051 INFO L138 BoogieDeclarations]: Found implementation of procedure list_add [2021-12-27 23:47:44,051 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-27 23:47:44,051 INFO L130 BoogieDeclarations]: Found specification of procedure __blast_assert [2021-12-27 23:47:44,051 INFO L138 BoogieDeclarations]: Found implementation of procedure __blast_assert [2021-12-27 23:47:44,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-27 23:47:44,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-27 23:47:44,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-27 23:47:44,134 INFO L234 CfgBuilder]: Building ICFG [2021-12-27 23:47:44,136 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-27 23:47:44,246 INFO L275 CfgBuilder]: Performing block encoding [2021-12-27 23:47:44,251 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-27 23:47:44,251 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-12-27 23:47:44,253 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:47:44 BoogieIcfgContainer [2021-12-27 23:47:44,253 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-27 23:47:44,254 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-27 23:47:44,254 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-27 23:47:44,257 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-27 23:47:44,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.12 11:47:43" (1/3) ... [2021-12-27 23:47:44,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3aa603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:47:44, skipping insertion in model container [2021-12-27 23:47:44,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.12 11:47:43" (2/3) ... [2021-12-27 23:47:44,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3d3aa603 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.12 11:47:44, skipping insertion in model container [2021-12-27 23:47:44,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:47:44" (3/3) ... [2021-12-27 23:47:44,259 INFO L111 eAbstractionObserver]: Analyzing ICFG rule60_list2.c_1.i [2021-12-27 23:47:44,264 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-27 23:47:44,264 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-27 23:47:44,333 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-27 23:47:44,338 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-27 23:47:44,338 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-27 23:47:44,376 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-27 23:47:44,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-27 23:47:44,379 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:47:44,380 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:47:44,380 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:47:44,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:47:44,386 INFO L85 PathProgramCache]: Analyzing trace with hash 484842023, now seen corresponding path program 1 times [2021-12-27 23:47:44,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:47:44,397 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595708776] [2021-12-27 23:47:44,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:47:44,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:47:44,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:44,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:47:44,607 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:47:44,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595708776] [2021-12-27 23:47:44,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595708776] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:47:44,609 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:47:44,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-27 23:47:44,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618923967] [2021-12-27 23:47:44,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:47:44,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-27 23:47:44,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:47:44,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-27 23:47:44,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-27 23:47:44,652 INFO L87 Difference]: Start difference. First operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 28 states have internal predecessors, (31), 8 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:47:44,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:47:44,715 INFO L93 Difference]: Finished difference Result 68 states and 93 transitions. [2021-12-27 23:47:44,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-27 23:47:44,718 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-27 23:47:44,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:47:44,724 INFO L225 Difference]: With dead ends: 68 [2021-12-27 23:47:44,724 INFO L226 Difference]: Without dead ends: 30 [2021-12-27 23:47:44,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-27 23:47:44,731 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 13 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-27 23:47:44,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 99 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-27 23:47:44,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-27 23:47:44,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-27 23:47:44,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.2) internal successors, (24), 21 states have internal predecessors, (24), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-27 23:47:44,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2021-12-27 23:47:44,769 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 7 [2021-12-27 23:47:44,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:47:44,769 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2021-12-27 23:47:44,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-27 23:47:44,770 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2021-12-27 23:47:44,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-27 23:47:44,772 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:47:44,772 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:47:44,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-27 23:47:44,773 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:47:44,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:47:44,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1134155612, now seen corresponding path program 1 times [2021-12-27 23:47:44,776 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:47:44,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379439889] [2021-12-27 23:47:44,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:47:44,777 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:47:44,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:44,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 23:47:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:44,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-27 23:47:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:44,981 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-27 23:47:44,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:47:44,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379439889] [2021-12-27 23:47:44,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379439889] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:47:44,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208733006] [2021-12-27 23:47:44,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:47:44,983 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:47:44,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:47:44,984 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 23:47:44,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-27 23:47:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:45,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-27 23:47:45,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:47:45,243 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-27 23:47:45,243 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:47:45,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-27 23:47:45,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208733006] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 23:47:45,354 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 23:47:45,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 7 [2021-12-27 23:47:45,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932687544] [2021-12-27 23:47:45,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 23:47:45,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-27 23:47:45,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:47:45,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-27 23:47:45,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-27 23:47:45,357 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 23:47:45,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:47:45,446 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2021-12-27 23:47:45,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-27 23:47:45,447 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-12-27 23:47:45,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:47:45,450 INFO L225 Difference]: With dead ends: 53 [2021-12-27 23:47:45,450 INFO L226 Difference]: Without dead ends: 33 [2021-12-27 23:47:45,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-27 23:47:45,457 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 12 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 23:47:45,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 127 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 23:47:45,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-12-27 23:47:45,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-12-27 23:47:45,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 24 states have internal predecessors, (26), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-27 23:47:45,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2021-12-27 23:47:45,474 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 26 [2021-12-27 23:47:45,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:47:45,474 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2021-12-27 23:47:45,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 5 states have internal predecessors, (18), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 23:47:45,475 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2021-12-27 23:47:45,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-27 23:47:45,476 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:47:45,476 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:47:45,502 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-27 23:47:45,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:47:45,693 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:47:45,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:47:45,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1951804062, now seen corresponding path program 1 times [2021-12-27 23:47:45,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:47:45,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71716233] [2021-12-27 23:47:45,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:47:45,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:47:45,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:45,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 23:47:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:45,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-27 23:47:45,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:45,846 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-27 23:47:45,846 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:47:45,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71716233] [2021-12-27 23:47:45,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71716233] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:47:45,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-27 23:47:45,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-27 23:47:45,850 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522743221] [2021-12-27 23:47:45,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:47:45,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-27 23:47:45,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:47:45,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-27 23:47:45,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-27 23:47:45,853 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-27 23:47:45,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:47:45,948 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2021-12-27 23:47:45,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-27 23:47:45,948 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-12-27 23:47:45,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:47:45,949 INFO L225 Difference]: With dead ends: 51 [2021-12-27 23:47:45,949 INFO L226 Difference]: Without dead ends: 30 [2021-12-27 23:47:45,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-27 23:47:45,950 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 12 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 23:47:45,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 121 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 23:47:45,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-12-27 23:47:45,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-12-27 23:47:45,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2021-12-27 23:47:45,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2021-12-27 23:47:45,955 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 26 [2021-12-27 23:47:45,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:47:45,955 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2021-12-27 23:47:45,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-27 23:47:45,956 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2021-12-27 23:47:45,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-12-27 23:47:45,956 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:47:45,957 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:47:45,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-27 23:47:45,957 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:47:45,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:47:45,957 INFO L85 PathProgramCache]: Analyzing trace with hash -1250739484, now seen corresponding path program 1 times [2021-12-27 23:47:45,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:47:45,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951029392] [2021-12-27 23:47:45,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:47:45,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:47:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:46,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 23:47:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:46,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-27 23:47:46,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:46,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-27 23:47:46,128 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:47:46,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951029392] [2021-12-27 23:47:46,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1951029392] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:47:46,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933217941] [2021-12-27 23:47:46,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:47:46,128 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:47:46,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:47:46,130 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 23:47:46,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-27 23:47:46,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:46,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-27 23:47:46,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:47:46,565 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-12-27 23:47:46,565 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-27 23:47:46,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933217941] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-27 23:47:46,566 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-12-27 23:47:46,566 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 22 [2021-12-27 23:47:46,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013787422] [2021-12-27 23:47:46,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-27 23:47:46,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-27 23:47:46,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:47:46,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-27 23:47:46,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-12-27 23:47:46,574 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 23:47:46,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:47:46,881 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2021-12-27 23:47:46,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-12-27 23:47:46,882 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 26 [2021-12-27 23:47:46,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:47:46,883 INFO L225 Difference]: With dead ends: 57 [2021-12-27 23:47:46,883 INFO L226 Difference]: Without dead ends: 54 [2021-12-27 23:47:46,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=857, Unknown=0, NotChecked=0, Total=992 [2021-12-27 23:47:46,885 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 74 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-27 23:47:46,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 135 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-27 23:47:46,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-27 23:47:46,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2021-12-27 23:47:46,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 33 states have (on average 1.2121212121212122) internal successors, (40), 34 states have internal predecessors, (40), 10 states have call successors, (10), 5 states have call predecessors, (10), 4 states have return successors, (10), 8 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-27 23:47:46,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2021-12-27 23:47:46,893 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 26 [2021-12-27 23:47:46,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:47:46,895 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2021-12-27 23:47:46,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 9 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-27 23:47:46,895 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2021-12-27 23:47:46,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-27 23:47:46,898 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:47:46,898 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-27 23:47:46,915 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-27 23:47:47,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-12-27 23:47:47,099 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:47:47,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:47:47,099 INFO L85 PathProgramCache]: Analyzing trace with hash 937918941, now seen corresponding path program 1 times [2021-12-27 23:47:47,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:47:47,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544352076] [2021-12-27 23:47:47,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:47:47,100 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:47:47,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:47,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 23:47:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:47,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-27 23:47:47,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:47,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-27 23:47:47,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:47,324 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 23:47:47,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:47:47,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544352076] [2021-12-27 23:47:47,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544352076] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:47:47,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075057457] [2021-12-27 23:47:47,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:47:47,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:47:47,325 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:47:47,326 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 23:47:47,352 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-27 23:47:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:47,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-27 23:47:47,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:47:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:47:47,603 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:47:47,779 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:47:47,779 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075057457] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 23:47:47,779 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 23:47:47,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17, 17] total 25 [2021-12-27 23:47:47,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330119096] [2021-12-27 23:47:47,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 23:47:47,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-12-27 23:47:47,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:47:47,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-12-27 23:47:47,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-12-27 23:47:47,783 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand has 25 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 19 states have internal predecessors, (39), 5 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-27 23:47:48,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:47:48,299 INFO L93 Difference]: Finished difference Result 64 states and 80 transitions. [2021-12-27 23:47:48,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-27 23:47:48,300 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 19 states have internal predecessors, (39), 5 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 33 [2021-12-27 23:47:48,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:47:48,301 INFO L225 Difference]: With dead ends: 64 [2021-12-27 23:47:48,301 INFO L226 Difference]: Without dead ends: 60 [2021-12-27 23:47:48,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=163, Invalid=1169, Unknown=0, NotChecked=0, Total=1332 [2021-12-27 23:47:48,302 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 84 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 626 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 626 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-27 23:47:48,303 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 101 Invalid, 697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 626 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-27 23:47:48,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-27 23:47:48,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-12-27 23:47:48,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 44 states have internal predecessors, (51), 11 states have call successors, (11), 6 states have call predecessors, (11), 6 states have return successors, (10), 9 states have call predecessors, (10), 7 states have call successors, (10) [2021-12-27 23:47:48,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2021-12-27 23:47:48,310 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 33 [2021-12-27 23:47:48,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:47:48,315 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2021-12-27 23:47:48,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 19 states have internal predecessors, (39), 5 states have call successors, (8), 6 states have call predecessors, (8), 5 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2021-12-27 23:47:48,316 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2021-12-27 23:47:48,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-27 23:47:48,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:47:48,318 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-12-27 23:47:48,342 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-27 23:47:48,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:47:48,542 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:47:48,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:47:48,543 INFO L85 PathProgramCache]: Analyzing trace with hash 128572315, now seen corresponding path program 1 times [2021-12-27 23:47:48,543 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:47:48,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506277418] [2021-12-27 23:47:48,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:47:48,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:47:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:48,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 23:47:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:48,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-27 23:47:48,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:48,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-27 23:47:48,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:48,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 23:47:48,714 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:47:48,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506277418] [2021-12-27 23:47:48,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506277418] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:47:48,714 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013180460] [2021-12-27 23:47:48,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:47:48,715 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:47:48,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:47:48,716 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 23:47:48,719 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-27 23:47:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:48,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 16 conjunts are in the unsatisfiable core [2021-12-27 23:47:48,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:47:49,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:47:49,093 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:47:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-27 23:47:49,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013180460] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 23:47:49,395 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 23:47:49,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 34 [2021-12-27 23:47:49,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517327812] [2021-12-27 23:47:49,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 23:47:49,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-12-27 23:47:49,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:47:49,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-12-27 23:47:49,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-12-27 23:47:49,398 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 26 states have internal predecessors, (63), 7 states have call successors, (13), 11 states have call predecessors, (13), 7 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-27 23:47:49,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:47:49,996 INFO L93 Difference]: Finished difference Result 78 states and 90 transitions. [2021-12-27 23:47:49,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-27 23:47:49,996 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 26 states have internal predecessors, (63), 7 states have call successors, (13), 11 states have call predecessors, (13), 7 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) Word has length 33 [2021-12-27 23:47:49,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:47:49,997 INFO L225 Difference]: With dead ends: 78 [2021-12-27 23:47:49,998 INFO L226 Difference]: Without dead ends: 68 [2021-12-27 23:47:49,999 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=285, Invalid=1695, Unknown=0, NotChecked=0, Total=1980 [2021-12-27 23:47:49,999 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 171 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-27 23:47:49,999 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 122 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-27 23:47:50,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-12-27 23:47:50,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2021-12-27 23:47:50,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-27 23:47:50,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2021-12-27 23:47:50,007 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 33 [2021-12-27 23:47:50,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:47:50,007 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2021-12-27 23:47:50,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 26 states have internal predecessors, (63), 7 states have call successors, (13), 11 states have call predecessors, (13), 7 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2021-12-27 23:47:50,007 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2021-12-27 23:47:50,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-27 23:47:50,008 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:47:50,008 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-12-27 23:47:50,037 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-12-27 23:47:50,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:47:50,233 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:47:50,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:47:50,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1975182920, now seen corresponding path program 1 times [2021-12-27 23:47:50,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:47:50,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102977715] [2021-12-27 23:47:50,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:47:50,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:47:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:50,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 23:47:50,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:50,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-27 23:47:50,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:50,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-27 23:47:50,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:50,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-27 23:47:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:50,386 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-12-27 23:47:50,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:47:50,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102977715] [2021-12-27 23:47:50,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102977715] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:47:50,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5018285] [2021-12-27 23:47:50,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:47:50,387 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:47:50,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:47:50,388 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 23:47:50,393 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-27 23:47:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:50,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-27 23:47:50,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:47:50,777 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 23:47:50,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:47:50,986 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-27 23:47:50,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [5018285] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 23:47:50,987 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 23:47:50,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 30 [2021-12-27 23:47:50,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138383383] [2021-12-27 23:47:50,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 23:47:50,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-27 23:47:50,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:47:50,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-27 23:47:50,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=803, Unknown=0, NotChecked=0, Total=870 [2021-12-27 23:47:50,989 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 23 states have internal predecessors, (56), 7 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-27 23:47:51,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:47:51,731 INFO L93 Difference]: Finished difference Result 82 states and 93 transitions. [2021-12-27 23:47:51,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-12-27 23:47:51,731 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 23 states have internal predecessors, (56), 7 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) Word has length 43 [2021-12-27 23:47:51,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:47:51,732 INFO L225 Difference]: With dead ends: 82 [2021-12-27 23:47:51,732 INFO L226 Difference]: Without dead ends: 64 [2021-12-27 23:47:51,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=256, Invalid=2096, Unknown=0, NotChecked=0, Total=2352 [2021-12-27 23:47:51,734 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 96 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 948 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-27 23:47:51,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 186 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 948 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-27 23:47:51,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-27 23:47:51,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 55. [2021-12-27 23:47:51,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 9 states have call successors, (9), 7 states have call predecessors, (9), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-27 23:47:51,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 61 transitions. [2021-12-27 23:47:51,742 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 61 transitions. Word has length 43 [2021-12-27 23:47:51,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:47:51,743 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 61 transitions. [2021-12-27 23:47:51,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.9310344827586208) internal successors, (56), 23 states have internal predecessors, (56), 7 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (9), 7 states have call predecessors, (9), 5 states have call successors, (9) [2021-12-27 23:47:51,743 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 61 transitions. [2021-12-27 23:47:51,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-12-27 23:47:51,744 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:47:51,744 INFO L514 BasicCegarLoop]: trace histogram [3, 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] [2021-12-27 23:47:51,771 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-12-27 23:47:51,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:47:51,964 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:47:51,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:47:51,964 INFO L85 PathProgramCache]: Analyzing trace with hash 156287564, now seen corresponding path program 1 times [2021-12-27 23:47:51,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:47:51,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529901407] [2021-12-27 23:47:51,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:47:51,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:47:51,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:52,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-27 23:47:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:52,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2021-12-27 23:47:52,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:52,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2021-12-27 23:47:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:52,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2021-12-27 23:47:52,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:52,094 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-27 23:47:52,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-27 23:47:52,094 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529901407] [2021-12-27 23:47:52,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529901407] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-27 23:47:52,095 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261289094] [2021-12-27 23:47:52,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:47:52,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:47:52,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-27 23:47:52,096 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-27 23:47:52,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-27 23:47:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-27 23:47:52,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 29 conjunts are in the unsatisfiable core [2021-12-27 23:47:52,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-27 23:47:52,319 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-27 23:47:52,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-27 23:47:52,449 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-27 23:47:52,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261289094] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-27 23:47:52,450 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-27 23:47:52,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 16 [2021-12-27 23:47:52,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835926320] [2021-12-27 23:47:52,450 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-27 23:47:52,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-27 23:47:52,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-27 23:47:52,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-27 23:47:52,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-12-27 23:47:52,451 INFO L87 Difference]: Start difference. First operand 55 states and 61 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-27 23:47:52,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-27 23:47:52,639 INFO L93 Difference]: Finished difference Result 60 states and 65 transitions. [2021-12-27 23:47:52,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-27 23:47:52,640 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 43 [2021-12-27 23:47:52,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-27 23:47:52,640 INFO L225 Difference]: With dead ends: 60 [2021-12-27 23:47:52,640 INFO L226 Difference]: Without dead ends: 53 [2021-12-27 23:47:52,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2021-12-27 23:47:52,641 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 26 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-27 23:47:52,642 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 114 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-27 23:47:52,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-27 23:47:52,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-12-27 23:47:52,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 38 states have internal predecessors, (42), 8 states have call successors, (8), 7 states have call predecessors, (8), 5 states have return successors, (8), 7 states have call predecessors, (8), 6 states have call successors, (8) [2021-12-27 23:47:52,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2021-12-27 23:47:52,648 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 43 [2021-12-27 23:47:52,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-27 23:47:52,649 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2021-12-27 23:47:52,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 12 states have internal predecessors, (43), 5 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-27 23:47:52,649 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2021-12-27 23:47:52,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-12-27 23:47:52,650 INFO L506 BasicCegarLoop]: Found error trace [2021-12-27 23:47:52,650 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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] [2021-12-27 23:47:52,675 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-12-27 23:47:52,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-27 23:47:52,863 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-27 23:47:52,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-27 23:47:52,864 INFO L85 PathProgramCache]: Analyzing trace with hash -2126992523, now seen corresponding path program 1 times [2021-12-27 23:47:52,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-27 23:47:52,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949559867] [2021-12-27 23:47:52,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-27 23:47:52,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-27 23:47:52,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-27 23:47:52,877 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-27 23:47:52,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-27 23:47:52,903 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-27 23:47:52,903 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-27 23:47:52,904 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __blast_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-27 23:47:52,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-27 23:47:52,908 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-27 23:47:52,910 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-27 23:47:52,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 27.12 11:47:52 BoogieIcfgContainer [2021-12-27 23:47:52,969 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-27 23:47:52,969 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-27 23:47:52,969 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-27 23:47:52,970 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-27 23:47:52,970 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.12 11:47:44" (3/4) ... [2021-12-27 23:47:52,972 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-27 23:47:53,022 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-27 23:47:53,023 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-27 23:47:53,023 INFO L158 Benchmark]: Toolchain (without parser) took 9610.69ms. Allocated memory was 60.8MB in the beginning and 94.4MB in the end (delta: 33.6MB). Free memory was 38.7MB in the beginning and 74.4MB in the end (delta: -35.6MB). Peak memory consumption was 48.9MB. Max. memory is 16.1GB. [2021-12-27 23:47:53,024 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 60.8MB. Free memory is still 43.4MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-27 23:47:53,024 INFO L158 Benchmark]: CACSL2BoogieTranslator took 465.41ms. Allocated memory is still 60.8MB. Free memory was 38.6MB in the beginning and 37.5MB in the end (delta: 1.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-27 23:47:53,024 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.48ms. Allocated memory is still 60.8MB. Free memory was 37.5MB in the beginning and 35.6MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-27 23:47:53,025 INFO L158 Benchmark]: Boogie Preprocessor took 36.56ms. Allocated memory is still 60.8MB. Free memory was 35.6MB in the beginning and 34.4MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-27 23:47:53,025 INFO L158 Benchmark]: RCFGBuilder took 281.94ms. Allocated memory was 60.8MB in the beginning and 77.6MB in the end (delta: 16.8MB). Free memory was 34.4MB in the beginning and 55.1MB in the end (delta: -20.7MB). Peak memory consumption was 10.1MB. Max. memory is 16.1GB. [2021-12-27 23:47:53,025 INFO L158 Benchmark]: TraceAbstraction took 8714.53ms. Allocated memory was 77.6MB in the beginning and 94.4MB in the end (delta: 16.8MB). Free memory was 54.6MB in the beginning and 30.4MB in the end (delta: 24.2MB). Peak memory consumption was 40.9MB. Max. memory is 16.1GB. [2021-12-27 23:47:53,026 INFO L158 Benchmark]: Witness Printer took 53.65ms. Allocated memory is still 94.4MB. Free memory was 30.4MB in the beginning and 74.4MB in the end (delta: -44.0MB). Peak memory consumption was 7.2MB. Max. memory is 16.1GB. [2021-12-27 23:47:53,027 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 60.8MB. Free memory is still 43.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 465.41ms. Allocated memory is still 60.8MB. Free memory was 38.6MB in the beginning and 37.5MB in the end (delta: 1.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.48ms. Allocated memory is still 60.8MB. Free memory was 37.5MB in the beginning and 35.6MB in the end (delta: 1.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.56ms. Allocated memory is still 60.8MB. Free memory was 35.6MB in the beginning and 34.4MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 281.94ms. Allocated memory was 60.8MB in the beginning and 77.6MB in the end (delta: 16.8MB). Free memory was 34.4MB in the beginning and 55.1MB in the end (delta: -20.7MB). Peak memory consumption was 10.1MB. Max. memory is 16.1GB. * TraceAbstraction took 8714.53ms. Allocated memory was 77.6MB in the beginning and 94.4MB in the end (delta: 16.8MB). Free memory was 54.6MB in the beginning and 30.4MB in the end (delta: 24.2MB). Peak memory consumption was 40.9MB. Max. memory is 16.1GB. * Witness Printer took 53.65ms. Allocated memory is still 94.4MB. Free memory was 30.4MB in the beginning and 74.4MB in the end (delta: -44.0MB). Peak memory consumption was 7.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 6]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L519] void * guard_malloc_counter = 0; [L534] struct list_head *elem = ((void *)0); [L544] static struct list_head head; VAL [elem={0:0}, guard_malloc_counter={0:0}, head={4:0}] [L546] struct list_head *dev1, *dev2; VAL [elem={0:0}, guard_malloc_counter={0:0}, head={4:0}] [L547] CALL, EXPR my_malloc(sizeof(*dev1)) VAL [\old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, elem={0:0}, guard_malloc_counter={0:0}, head={4:0}] [L529] CALL, EXPR __getMemory(size) [L522] (size > 0) ? (0) : __blast_assert () VAL [\old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:0}, head={4:0}, size=8] [L523] guard_malloc_counter++ [L524] COND FALSE !(!__VERIFIER_nondet_int()) [L526] return (void *) guard_malloc_counter; VAL [\old(guard_malloc_counter)=0, \old(guard_malloc_counter)=0, \old(size)=8, \result={0:1}, elem={0:0}, guard_malloc_counter={0:1}, head={4:0}, size=8] [L529] RET, EXPR __getMemory(size) [L529] return __getMemory(size); [L547] RET, EXPR my_malloc(sizeof(*dev1)) VAL [elem={0:0}, guard_malloc_counter={0:1}, head={4:0}, my_malloc(sizeof(*dev1))={0:1}] [L547] dev1 = my_malloc(sizeof(*dev1)) [L548] CALL, EXPR my_malloc(sizeof(*dev2)) VAL [\old(guard_malloc_counter)=0, \old(guard_malloc_counter)=1, elem={0:0}, guard_malloc_counter={0:1}, head={4:0}] [L529] CALL, EXPR __getMemory(size) [L522] (size > 0) ? (0) : __blast_assert () VAL [\old(guard_malloc_counter)=1, \old(guard_malloc_counter)=0, \old(size)=8, elem={0:0}, guard_malloc_counter={0:1}, head={4:0}, size=8] [L523] guard_malloc_counter++ [L524] COND FALSE !(!__VERIFIER_nondet_int()) [L526] return (void *) guard_malloc_counter; VAL [\old(guard_malloc_counter)=0, \old(guard_malloc_counter)=1, \old(size)=8, \result={0:2}, elem={0:0}, guard_malloc_counter={0:2}, head={4:0}, size=8] [L529] RET, EXPR __getMemory(size) [L529] return __getMemory(size); [L548] RET, EXPR my_malloc(sizeof(*dev2)) VAL [dev1={0:1}, elem={0:0}, guard_malloc_counter={0:2}, head={4:0}, my_malloc(sizeof(*dev2))={0:2}] [L548] dev2 = my_malloc(sizeof(*dev2)) [L549] COND TRUE dev1!=((void *)0) && dev2!=((void *)0) VAL [dev1={0:1}, dev2={0:2}, elem={0:0}, guard_malloc_counter={0:2}, head={4:0}] [L550] CALL list_add(dev2, &head) VAL [\old(elem)=0, \old(elem)=0, elem={0:0}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, new={0:2}] [L536] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=0, \old(elem)=0, elem={0:0}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, head={4:0}, new={0:2}, new={0:2}] [L537] COND TRUE __VERIFIER_nondet_int() [L538] elem = new VAL [\old(elem)=0, \old(elem)=0, elem={0:2}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, head={4:0}, new={0:2}, new={0:2}] [L550] RET list_add(dev2, &head) VAL [dev1={0:1}, dev2={0:2}, elem={0:2}, guard_malloc_counter={0:2}, head={4:0}] [L551] CALL list_add(dev1, &head) VAL [\old(elem)=2, \old(elem)=0, elem={0:2}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, new={0:1}] [L536] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=0, \old(elem)=2, elem={0:2}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, head={4:0}, new={0:1}, new={0:1}] [L537] COND TRUE __VERIFIER_nondet_int() [L538] elem = new VAL [\old(elem)=0, \old(elem)=2, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, head={4:0}, new={0:1}, new={0:1}] [L551] RET list_add(dev1, &head) VAL [dev1={0:1}, dev2={0:2}, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}] [L552] CALL list_del(dev2) [L541] COND FALSE !(entry==elem) VAL [elem={0:1}, entry={0:2}, entry={0:2}, guard_malloc_counter={0:2}, head={4:0}] [L552] RET list_del(dev2) [L553] CALL list_add(dev2, &head) VAL [\old(elem)=1, \old(elem)=0, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, new={0:2}] [L536] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=0, \old(elem)=1, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, head={4:0}, new={0:2}, new={0:2}] [L537] COND FALSE !(__VERIFIER_nondet_int()) [L553] RET list_add(dev2, &head) VAL [dev1={0:1}, dev2={0:2}, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}] [L554] CALL list_add(dev1, &head) VAL [\old(elem)=0, \old(elem)=1, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, new={0:1}] [L536] (new!=elem) ? (0) : __blast_assert () VAL [\old(elem)=0, \old(elem)=1, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}, head={4:0}, head={4:0}, new={0:1}, new={0:1}] [L536] CALL __blast_assert () VAL [\old(elem)=1, \old(elem)=0, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}] [L6] reach_error() VAL [\old(elem)=1, \old(elem)=0, elem={0:1}, guard_malloc_counter={0:2}, head={4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 37 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.6s, OverallIterations: 9, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 488 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 488 mSDsluCounter, 1005 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 755 mSDsCounter, 313 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2916 IncrementalHoareTripleChecker+Invalid, 3229 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 313 mSolverCounterUnsat, 250 mSDtfsCounter, 2916 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 552 GetRequests, 358 SyntacticMatches, 5 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 2.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=60occurred in iteration=5, InterpolantAutomatonStates: 94, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 30 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 3.7s InterpolantComputationTime, 491 NumberOfCodeBlocks, 491 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 600 ConstructedInterpolants, 0 QuantifiedInterpolants, 2176 SizeOfPredicates, 34 NumberOfNonLiveVariables, 1223 ConjunctsInSsa, 115 ConjunctsInUnsatCore, 19 InterpolantComputations, 3 PerfectInterpolantSequences, 117/198 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-12-27 23:47:53,056 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE