./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-properties/simple-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c3fed411 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-properties/simple-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 06:01:45,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 06:01:45,545 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 06:01:45,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 06:01:45,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 06:01:45,580 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 06:01:45,582 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 06:01:45,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 06:01:45,589 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 06:01:45,590 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 06:01:45,591 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 06:01:45,594 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 06:01:45,594 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 06:01:45,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 06:01:45,599 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 06:01:45,601 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 06:01:45,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 06:01:45,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 06:01:45,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 06:01:45,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 06:01:45,610 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 06:01:45,618 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 06:01:45,619 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 06:01:45,619 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 06:01:45,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 06:01:45,622 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 06:01:45,622 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 06:01:45,623 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 06:01:45,623 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 06:01:45,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 06:01:45,625 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 06:01:45,625 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 06:01:45,630 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 06:01:45,631 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 06:01:45,632 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 06:01:45,632 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 06:01:45,633 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 06:01:45,633 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 06:01:45,634 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 06:01:45,635 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 06:01:45,636 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 06:01:45,637 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 06:01:45,674 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 06:01:45,675 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 06:01:45,675 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 06:01:45,675 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 06:01:45,676 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 06:01:45,676 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 06:01:45,677 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 06:01:45,677 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 06:01:45,686 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 06:01:45,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 06:01:45,687 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 06:01:45,688 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 06:01:45,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 06:01:45,688 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 06:01:45,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 06:01:45,688 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 06:01:45,689 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 06:01:45,689 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 06:01:45,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 06:01:45,689 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 06:01:45,689 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 06:01:45,690 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 06:01:45,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 06:01:45,690 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 06:01:45,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 06:01:45,691 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 06:01:45,691 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 06:01:45,691 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 06:01:45,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 06:01:45,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 06:01:45,692 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 06:01:45,692 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 [2021-12-16 06:01:45,964 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 06:01:45,989 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 06:01:45,992 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 06:01:45,993 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 06:01:45,994 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 06:01:45,995 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/simple-2.i [2021-12-16 06:01:46,061 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/207acca35/df35a6ff26f745b39c78982e6ffb3065/FLAG229aa5818 [2021-12-16 06:01:46,566 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 06:01:46,570 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple-2.i [2021-12-16 06:01:46,585 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/207acca35/df35a6ff26f745b39c78982e6ffb3065/FLAG229aa5818 [2021-12-16 06:01:47,035 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/207acca35/df35a6ff26f745b39c78982e6ffb3065 [2021-12-16 06:01:47,037 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 06:01:47,039 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 06:01:47,042 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 06:01:47,042 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 06:01:47,044 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 06:01:47,045 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:01:47" (1/1) ... [2021-12-16 06:01:47,045 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a426ed0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:47, skipping insertion in model container [2021-12-16 06:01:47,046 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:01:47" (1/1) ... [2021-12-16 06:01:47,054 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 06:01:47,084 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 06:01:47,354 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/list-properties/simple-2.i[23225,23238] [2021-12-16 06:01:47,356 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:01:47,366 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 06:01:47,421 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/list-properties/simple-2.i[23225,23238] [2021-12-16 06:01:47,424 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:01:47,447 INFO L208 MainTranslator]: Completed translation [2021-12-16 06:01:47,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:47 WrapperNode [2021-12-16 06:01:47,449 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 06:01:47,449 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 06:01:47,450 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 06:01:47,450 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 06:01:47,456 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:47" (1/1) ... [2021-12-16 06:01:47,481 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:47" (1/1) ... [2021-12-16 06:01:47,500 INFO L137 Inliner]: procedures = 124, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2021-12-16 06:01:47,500 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 06:01:47,501 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 06:01:47,501 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 06:01:47,501 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 06:01:47,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:47" (1/1) ... [2021-12-16 06:01:47,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:47" (1/1) ... [2021-12-16 06:01:47,515 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:47" (1/1) ... [2021-12-16 06:01:47,515 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:47" (1/1) ... [2021-12-16 06:01:47,529 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:47" (1/1) ... [2021-12-16 06:01:47,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:47" (1/1) ... [2021-12-16 06:01:47,540 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:47" (1/1) ... [2021-12-16 06:01:47,542 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 06:01:47,546 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 06:01:47,547 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 06:01:47,547 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 06:01:47,548 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:47" (1/1) ... [2021-12-16 06:01:47,554 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 06:01:47,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:01:47,581 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) [2021-12-16 06:01:47,612 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 [2021-12-16 06:01:47,627 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-12-16 06:01:47,627 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-12-16 06:01:47,627 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 06:01:47,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 06:01:47,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 06:01:47,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 06:01:47,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 06:01:47,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 06:01:47,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 06:01:47,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 06:01:47,628 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 06:01:47,728 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 06:01:47,730 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 06:01:47,762 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-12-16 06:01:47,972 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 06:01:47,978 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 06:01:47,978 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 06:01:47,980 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:01:47 BoogieIcfgContainer [2021-12-16 06:01:47,980 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 06:01:47,981 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 06:01:47,982 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 06:01:47,984 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 06:01:47,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 06:01:47" (1/3) ... [2021-12-16 06:01:47,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48446c91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 06:01:47, skipping insertion in model container [2021-12-16 06:01:47,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:47" (2/3) ... [2021-12-16 06:01:47,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48446c91 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 06:01:47, skipping insertion in model container [2021-12-16 06:01:47,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:01:47" (3/3) ... [2021-12-16 06:01:47,987 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2021-12-16 06:01:47,992 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 06:01:47,992 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-12-16 06:01:48,037 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 06:01:48,043 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-12-16 06:01:48,043 INFO L340 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2021-12-16 06:01:48,059 INFO L276 IsEmpty]: Start isEmpty. Operand has 45 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 43 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:48,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-16 06:01:48,067 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:01:48,067 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-16 06:01:48,068 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 06:01:48,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:01:48,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1037517224, now seen corresponding path program 1 times [2021-12-16 06:01:48,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:01:48,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080182077] [2021-12-16 06:01:48,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:01:48,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:01:48,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:01:48,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:01:48,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:01:48,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080182077] [2021-12-16 06:01:48,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080182077] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:01:48,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:01:48,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 06:01:48,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586195222] [2021-12-16 06:01:48,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:01:48,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-16 06:01:48,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:01:48,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-16 06:01:48,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 06:01:48,271 INFO L87 Difference]: Start difference. First operand has 45 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 43 states have internal predecessors, (49), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:48,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:01:48,282 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2021-12-16 06:01:48,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 06:01:48,284 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-16 06:01:48,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:01:48,288 INFO L225 Difference]: With dead ends: 45 [2021-12-16 06:01:48,289 INFO L226 Difference]: Without dead ends: 39 [2021-12-16 06:01:48,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-16 06:01:48,293 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:01:48,294 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:01:48,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-12-16 06:01:48,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-12-16 06:01:48,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 23 states have (on average 1.7391304347826086) internal successors, (40), 38 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:48,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-12-16 06:01:48,325 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 6 [2021-12-16 06:01:48,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:01:48,325 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-12-16 06:01:48,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:48,328 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-12-16 06:01:48,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 06:01:48,328 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:01:48,328 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:01:48,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 06:01:48,329 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 06:01:48,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:01:48,331 INFO L85 PathProgramCache]: Analyzing trace with hash 2098238120, now seen corresponding path program 1 times [2021-12-16 06:01:48,331 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:01:48,331 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752651845] [2021-12-16 06:01:48,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:01:48,332 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:01:48,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:01:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:01:48,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:01:48,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752651845] [2021-12-16 06:01:48,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752651845] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:01:48,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:01:48,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 06:01:48,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241099065] [2021-12-16 06:01:48,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:01:48,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 06:01:48,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:01:48,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 06:01:48,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 06:01:48,432 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:48,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:01:48,549 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2021-12-16 06:01:48,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 06:01:48,549 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-16 06:01:48,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:01:48,550 INFO L225 Difference]: With dead ends: 47 [2021-12-16 06:01:48,551 INFO L226 Difference]: Without dead ends: 47 [2021-12-16 06:01:48,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 06:01:48,552 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:01:48,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 16 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:01:48,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-12-16 06:01:48,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2021-12-16 06:01:48,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.6206896551724137) internal successors, (47), 40 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:48,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2021-12-16 06:01:48,558 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 7 [2021-12-16 06:01:48,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:01:48,577 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2021-12-16 06:01:48,577 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:48,577 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2021-12-16 06:01:48,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 06:01:48,583 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:01:48,583 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:01:48,584 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 06:01:48,584 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 06:01:48,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:01:48,585 INFO L85 PathProgramCache]: Analyzing trace with hash 2098238121, now seen corresponding path program 1 times [2021-12-16 06:01:48,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:01:48,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823602586] [2021-12-16 06:01:48,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:01:48,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:01:48,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:01:48,668 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:01:48,669 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:01:48,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823602586] [2021-12-16 06:01:48,670 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823602586] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:01:48,670 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:01:48,670 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 06:01:48,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925378883] [2021-12-16 06:01:48,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:01:48,671 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 06:01:48,671 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:01:48,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 06:01:48,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 06:01:48,672 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:48,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:01:48,746 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2021-12-16 06:01:48,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 06:01:48,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-16 06:01:48,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:01:48,748 INFO L225 Difference]: With dead ends: 56 [2021-12-16 06:01:48,748 INFO L226 Difference]: Without dead ends: 56 [2021-12-16 06:01:48,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 06:01:48,750 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 68 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:01:48,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 25 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:01:48,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-12-16 06:01:48,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 48. [2021-12-16 06:01:48,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:48,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-12-16 06:01:48,757 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 7 [2021-12-16 06:01:48,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:01:48,757 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-12-16 06:01:48,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:48,758 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-12-16 06:01:48,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-16 06:01:48,758 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:01:48,758 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:01:48,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 06:01:48,759 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 06:01:48,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:01:48,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1884133396, now seen corresponding path program 1 times [2021-12-16 06:01:48,760 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:01:48,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078425171] [2021-12-16 06:01:48,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:01:48,761 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:01:48,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:01:48,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:01:48,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:01:48,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078425171] [2021-12-16 06:01:48,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078425171] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:01:48,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:01:48,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 06:01:48,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782327302] [2021-12-16 06:01:48,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:01:48,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 06:01:48,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:01:48,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 06:01:48,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 06:01:48,824 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:48,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:01:48,881 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2021-12-16 06:01:48,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 06:01:48,882 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-16 06:01:48,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:01:48,883 INFO L225 Difference]: With dead ends: 53 [2021-12-16 06:01:48,883 INFO L226 Difference]: Without dead ends: 53 [2021-12-16 06:01:48,883 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 [2021-12-16 06:01:48,885 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 58 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:01:48,885 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 37 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:01:48,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-16 06:01:48,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2021-12-16 06:01:48,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 47 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:48,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2021-12-16 06:01:48,890 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 12 [2021-12-16 06:01:48,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:01:48,891 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2021-12-16 06:01:48,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:48,891 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2021-12-16 06:01:48,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 06:01:48,892 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:01:48,892 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:01:48,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 06:01:48,893 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 06:01:48,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:01:48,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1721365971, now seen corresponding path program 1 times [2021-12-16 06:01:48,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:01:48,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709820484] [2021-12-16 06:01:48,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:01:48,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:01:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:01:48,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:01:48,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:01:48,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709820484] [2021-12-16 06:01:48,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709820484] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:01:48,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:01:48,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 06:01:48,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417903458] [2021-12-16 06:01:48,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:01:48,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 06:01:48,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:01:48,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 06:01:48,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:01:48,987 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:49,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:01:49,124 INFO L93 Difference]: Finished difference Result 85 states and 88 transitions. [2021-12-16 06:01:49,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 06:01:49,125 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-16 06:01:49,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:01:49,127 INFO L225 Difference]: With dead ends: 85 [2021-12-16 06:01:49,127 INFO L226 Difference]: Without dead ends: 85 [2021-12-16 06:01:49,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-16 06:01:49,128 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 68 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:01:49,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 99 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:01:49,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-16 06:01:49,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 52. [2021-12-16 06:01:49,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.375) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:49,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2021-12-16 06:01:49,143 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 13 [2021-12-16 06:01:49,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:01:49,143 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2021-12-16 06:01:49,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:49,145 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2021-12-16 06:01:49,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-16 06:01:49,145 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:01:49,146 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:01:49,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 06:01:49,146 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 06:01:49,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:01:49,147 INFO L85 PathProgramCache]: Analyzing trace with hash 761251611, now seen corresponding path program 1 times [2021-12-16 06:01:49,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:01:49,147 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577420653] [2021-12-16 06:01:49,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:01:49,148 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:01:49,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:01:49,231 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:01:49,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:01:49,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577420653] [2021-12-16 06:01:49,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577420653] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:01:49,232 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:01:49,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 06:01:49,232 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903342213] [2021-12-16 06:01:49,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:01:49,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 06:01:49,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:01:49,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 06:01:49,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:01:49,234 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:49,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:01:49,367 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2021-12-16 06:01:49,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 06:01:49,367 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-16 06:01:49,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:01:49,369 INFO L225 Difference]: With dead ends: 64 [2021-12-16 06:01:49,369 INFO L226 Difference]: Without dead ends: 64 [2021-12-16 06:01:49,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-16 06:01:49,373 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 44 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:01:49,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 93 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:01:49,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-12-16 06:01:49,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 50. [2021-12-16 06:01:49,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 40 states have (on average 1.325) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:49,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-12-16 06:01:49,389 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 15 [2021-12-16 06:01:49,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:01:49,389 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-12-16 06:01:49,390 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:49,390 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-12-16 06:01:49,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-16 06:01:49,390 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:01:49,391 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:01:49,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-12-16 06:01:49,391 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 06:01:49,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:01:49,392 INFO L85 PathProgramCache]: Analyzing trace with hash 761251612, now seen corresponding path program 1 times [2021-12-16 06:01:49,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:01:49,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164944684] [2021-12-16 06:01:49,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:01:49,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:01:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:01:49,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:01:49,499 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:01:49,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164944684] [2021-12-16 06:01:49,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164944684] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:01:49,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:01:49,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 06:01:49,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518314888] [2021-12-16 06:01:49,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:01:49,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 06:01:49,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:01:49,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 06:01:49,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:01:49,500 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:49,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:01:49,664 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2021-12-16 06:01:49,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 06:01:49,665 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-16 06:01:49,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:01:49,665 INFO L225 Difference]: With dead ends: 60 [2021-12-16 06:01:49,665 INFO L226 Difference]: Without dead ends: 60 [2021-12-16 06:01:49,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-16 06:01:49,666 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 30 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:01:49,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 111 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:01:49,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-16 06:01:49,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 40. [2021-12-16 06:01:49,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:49,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2021-12-16 06:01:49,670 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 15 [2021-12-16 06:01:49,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:01:49,670 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2021-12-16 06:01:49,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.0) internal successors, (15), 6 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:49,671 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2021-12-16 06:01:49,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-16 06:01:49,671 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:01:49,671 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:01:49,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-12-16 06:01:49,672 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 06:01:49,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:01:49,672 INFO L85 PathProgramCache]: Analyzing trace with hash 700715683, now seen corresponding path program 1 times [2021-12-16 06:01:49,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:01:49,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787735989] [2021-12-16 06:01:49,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:01:49,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:01:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:01:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:01:49,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:01:49,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787735989] [2021-12-16 06:01:49,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787735989] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:01:49,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855633523] [2021-12-16 06:01:49,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:01:49,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:01:49,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:01:49,779 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) [2021-12-16 06:01:49,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-16 06:01:49,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:01:49,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-16 06:01:49,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:01:50,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 06:01:50,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 06:01:50,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 06:01:50,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 06:01:50,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:01:50,206 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:01:50,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 55 treesize of output 49 [2021-12-16 06:01:50,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 41 [2021-12-16 06:01:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:01:50,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855633523] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 06:01:50,559 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 06:01:50,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10, 10] total 16 [2021-12-16 06:01:50,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539719670] [2021-12-16 06:01:50,560 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 06:01:50,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-12-16 06:01:50,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:01:50,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-12-16 06:01:50,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-12-16 06:01:50,561 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:50,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:01:50,735 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-12-16 06:01:50,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-12-16 06:01:50,736 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-16 06:01:50,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:01:50,736 INFO L225 Difference]: With dead ends: 55 [2021-12-16 06:01:50,737 INFO L226 Difference]: Without dead ends: 55 [2021-12-16 06:01:50,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2021-12-16 06:01:50,738 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 140 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 17 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:01:50,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 129 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 140 Invalid, 0 Unknown, 17 Unchecked, 0.1s Time] [2021-12-16 06:01:50,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-12-16 06:01:50,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 43. [2021-12-16 06:01:50,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.2105263157894737) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:50,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2021-12-16 06:01:50,741 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 16 [2021-12-16 06:01:50,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:01:50,741 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2021-12-16 06:01:50,741 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.1875) internal successors, (35), 16 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:50,741 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2021-12-16 06:01:50,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-12-16 06:01:50,742 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:01:50,742 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:01:50,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-16 06:01:50,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:01:50,972 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 06:01:50,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:01:50,973 INFO L85 PathProgramCache]: Analyzing trace with hash 247348413, now seen corresponding path program 1 times [2021-12-16 06:01:50,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:01:50,973 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778392775] [2021-12-16 06:01:50,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:01:50,973 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:01:50,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 06:01:51,001 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 06:01:51,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 06:01:51,034 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-16 06:01:51,034 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-16 06:01:51,035 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (15 of 16 remaining) [2021-12-16 06:01:51,040 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (14 of 16 remaining) [2021-12-16 06:01:51,040 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (13 of 16 remaining) [2021-12-16 06:01:51,040 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (12 of 16 remaining) [2021-12-16 06:01:51,041 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (11 of 16 remaining) [2021-12-16 06:01:51,041 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (10 of 16 remaining) [2021-12-16 06:01:51,041 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (9 of 16 remaining) [2021-12-16 06:01:51,041 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (8 of 16 remaining) [2021-12-16 06:01:51,041 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (7 of 16 remaining) [2021-12-16 06:01:51,041 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (6 of 16 remaining) [2021-12-16 06:01:51,041 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (5 of 16 remaining) [2021-12-16 06:01:51,042 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION (4 of 16 remaining) [2021-12-16 06:01:51,042 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION (3 of 16 remaining) [2021-12-16 06:01:51,042 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (2 of 16 remaining) [2021-12-16 06:01:51,042 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION (1 of 16 remaining) [2021-12-16 06:01:51,042 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION (0 of 16 remaining) [2021-12-16 06:01:51,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-12-16 06:01:51,045 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:01:51,048 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-16 06:01:51,068 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 06:01:51 BoogieIcfgContainer [2021-12-16 06:01:51,068 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-16 06:01:51,069 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-16 06:01:51,069 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-16 06:01:51,069 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-16 06:01:51,069 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:01:47" (3/4) ... [2021-12-16 06:01:51,072 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-16 06:01:51,072 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-16 06:01:51,073 INFO L158 Benchmark]: Toolchain (without parser) took 4033.76ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 56.5MB in the beginning and 86.3MB in the end (delta: -29.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 06:01:51,073 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 96.5MB. Free memory is still 74.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 06:01:51,073 INFO L158 Benchmark]: CACSL2BoogieTranslator took 407.10ms. Allocated memory is still 96.5MB. Free memory was 56.4MB in the beginning and 67.1MB in the end (delta: -10.7MB). Peak memory consumption was 12.9MB. Max. memory is 16.1GB. [2021-12-16 06:01:51,073 INFO L158 Benchmark]: Boogie Procedure Inliner took 50.86ms. Allocated memory is still 96.5MB. Free memory was 67.1MB in the beginning and 65.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 06:01:51,074 INFO L158 Benchmark]: Boogie Preprocessor took 44.88ms. Allocated memory is still 96.5MB. Free memory was 65.2MB in the beginning and 63.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 06:01:51,074 INFO L158 Benchmark]: RCFGBuilder took 433.59ms. Allocated memory is still 96.5MB. Free memory was 63.7MB in the beginning and 65.1MB in the end (delta: -1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-16 06:01:51,074 INFO L158 Benchmark]: TraceAbstraction took 3086.69ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 64.6MB in the beginning and 87.2MB in the end (delta: -22.5MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 06:01:51,075 INFO L158 Benchmark]: Witness Printer took 3.16ms. Allocated memory is still 117.4MB. Free memory was 87.2MB in the beginning and 86.3MB in the end (delta: 893.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 06:01:51,076 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 96.5MB. Free memory is still 74.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 407.10ms. Allocated memory is still 96.5MB. Free memory was 56.4MB in the beginning and 67.1MB in the end (delta: -10.7MB). Peak memory consumption was 12.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 50.86ms. Allocated memory is still 96.5MB. Free memory was 67.1MB in the beginning and 65.2MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 44.88ms. Allocated memory is still 96.5MB. Free memory was 65.2MB in the beginning and 63.9MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 433.59ms. Allocated memory is still 96.5MB. Free memory was 63.7MB in the beginning and 65.1MB in the end (delta: -1.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * TraceAbstraction took 3086.69ms. Allocated memory was 96.5MB in the beginning and 117.4MB in the end (delta: 21.0MB). Free memory was 64.6MB in the beginning and 87.2MB in the end (delta: -22.5MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 3.16ms. Allocated memory is still 117.4MB. Free memory was 87.2MB in the beginning and 86.3MB in the end (delta: 893.8kB). There was no memory consumed. 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 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={-1:0}] [L534] List t; [L535] List p = a; VAL [a={-1:0}, p={-1:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 1 VAL [a={-1:0}, p={-1:0}] [L544] p->n = 0 VAL [a={-1:0}, p={-1:0}] [L545] p = a VAL [a={-1:0}, p={-1:0}] [L546] COND TRUE p!=0 VAL [a={-1:0}, p={-1:0}] [L547] EXPR p->h VAL [a={-1:0}, p={-1:0}, p->h=1] [L547] COND FALSE !(p->h != 1) [L550] EXPR p->n VAL [a={-1:0}, p={-1:0}, p->n={0:0}] [L550] p = p->n [L546] COND FALSE !(p!=0) VAL [a={-1:0}, p={0:0}] [L552] return 0; VAL [\result=0, a={-1:0}, p={0:0}] - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 46 locations, 16 error locations. Started 1 CEGAR loops. OverallTime: 3.0s, OverallIterations: 9, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 475 SdHoareTripleChecker+Valid, 0.6s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 475 mSDsluCounter, 558 SdHoareTripleChecker+Invalid, 0.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 17 IncrementalHoareTripleChecker+Unchecked, 342 mSDsCounter, 85 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 578 IncrementalHoareTripleChecker+Invalid, 680 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 85 mSolverCounterUnsat, 216 mSDtfsCounter, 578 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 87 GetRequests, 30 SyntacticMatches, 6 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=52occurred in iteration=5, InterpolantAutomatonStates: 46, 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, 98 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 113 ConstructedInterpolants, 1 QuantifiedInterpolants, 854 SizeOfPredicates, 10 NumberOfNonLiveVariables, 102 ConjunctsInSsa, 26 ConjunctsInUnsatCore, 10 InterpolantComputations, 7 PerfectInterpolantSequences, 7/10 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 could not prove your program: unable to determine feasibility of some traces [2021-12-16 06:01:51,122 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 Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/list-properties/simple-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 06:01:53,162 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 06:01:53,165 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 06:01:53,206 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 06:01:53,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 06:01:53,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 06:01:53,211 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 06:01:53,215 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 06:01:53,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 06:01:53,222 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 06:01:53,223 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 06:01:53,224 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 06:01:53,224 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 06:01:53,227 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 06:01:53,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 06:01:53,234 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 06:01:53,235 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 06:01:53,235 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 06:01:53,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 06:01:53,243 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 06:01:53,244 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 06:01:53,248 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 06:01:53,249 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 06:01:53,251 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 06:01:53,256 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 06:01:53,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 06:01:53,257 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 06:01:53,258 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 06:01:53,259 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 06:01:53,259 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 06:01:53,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 06:01:53,260 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 06:01:53,262 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 06:01:53,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 06:01:53,263 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 06:01:53,264 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 06:01:53,264 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 06:01:53,265 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 06:01:53,265 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 06:01:53,266 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 06:01:53,267 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 06:01:53,268 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-16 06:01:53,304 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 06:01:53,305 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 06:01:53,306 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 06:01:53,306 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 06:01:53,307 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 06:01:53,307 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 06:01:53,308 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 06:01:53,308 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 06:01:53,309 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 06:01:53,309 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 06:01:53,309 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 06:01:53,310 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 06:01:53,310 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 06:01:53,310 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 06:01:53,310 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 06:01:53,310 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 06:01:53,311 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 06:01:53,311 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 06:01:53,311 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 06:01:53,311 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 06:01:53,311 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-16 06:01:53,312 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-16 06:01:53,312 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 06:01:53,312 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 06:01:53,312 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 06:01:53,316 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 06:01:53,317 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 06:01:53,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 06:01:53,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 06:01:53,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 06:01:53,320 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-16 06:01:53,321 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-16 06:01:53,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 06:01:53,321 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-16 06:01:53,322 INFO L138 SettingsManager]: * Logic for external solver=AUFBV 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a0d4825ef04f5689aff4ed3e5df593fedd83b7eb3ae072cea52c48718c9baf42 [2021-12-16 06:01:53,630 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 06:01:53,648 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 06:01:53,650 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 06:01:53,651 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 06:01:53,652 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 06:01:53,653 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-properties/simple-2.i [2021-12-16 06:01:53,710 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bebc331dc/d258abf3f47948c696df8b1e92b6300d/FLAGac063d9da [2021-12-16 06:01:54,200 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 06:01:54,201 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-properties/simple-2.i [2021-12-16 06:01:54,216 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bebc331dc/d258abf3f47948c696df8b1e92b6300d/FLAGac063d9da [2021-12-16 06:01:54,701 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bebc331dc/d258abf3f47948c696df8b1e92b6300d [2021-12-16 06:01:54,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 06:01:54,704 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 06:01:54,706 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 06:01:54,706 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 06:01:54,709 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 06:01:54,710 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:01:54" (1/1) ... [2021-12-16 06:01:54,711 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b30f08e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:54, skipping insertion in model container [2021-12-16 06:01:54,711 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:01:54" (1/1) ... [2021-12-16 06:01:54,717 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 06:01:54,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 06:01:55,019 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/list-properties/simple-2.i[23225,23238] [2021-12-16 06:01:55,026 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:01:55,044 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 06:01:55,080 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/list-properties/simple-2.i[23225,23238] [2021-12-16 06:01:55,082 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:01:55,113 INFO L208 MainTranslator]: Completed translation [2021-12-16 06:01:55,114 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:55 WrapperNode [2021-12-16 06:01:55,114 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 06:01:55,115 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 06:01:55,116 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 06:01:55,116 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 06:01:55,121 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:55" (1/1) ... [2021-12-16 06:01:55,139 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:55" (1/1) ... [2021-12-16 06:01:55,160 INFO L137 Inliner]: procedures = 127, calls = 17, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 52 [2021-12-16 06:01:55,161 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 06:01:55,162 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 06:01:55,162 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 06:01:55,162 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 06:01:55,169 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:55" (1/1) ... [2021-12-16 06:01:55,169 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:55" (1/1) ... [2021-12-16 06:01:55,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:55" (1/1) ... [2021-12-16 06:01:55,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:55" (1/1) ... [2021-12-16 06:01:55,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:55" (1/1) ... [2021-12-16 06:01:55,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:55" (1/1) ... [2021-12-16 06:01:55,200 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:55" (1/1) ... [2021-12-16 06:01:55,203 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 06:01:55,204 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 06:01:55,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 06:01:55,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 06:01:55,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:55" (1/1) ... [2021-12-16 06:01:55,211 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 06:01:55,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:01:55,239 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) [2021-12-16 06:01:55,246 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 [2021-12-16 06:01:55,270 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2021-12-16 06:01:55,271 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2021-12-16 06:01:55,271 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-16 06:01:55,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 06:01:55,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 06:01:55,271 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 06:01:55,272 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 06:01:55,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-16 06:01:55,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-16 06:01:55,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 06:01:55,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 06:01:55,407 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 06:01:55,409 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 06:01:55,482 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2021-12-16 06:01:55,730 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 06:01:55,735 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 06:01:55,737 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-12-16 06:01:55,740 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:01:55 BoogieIcfgContainer [2021-12-16 06:01:55,740 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 06:01:55,742 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 06:01:55,742 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 06:01:55,745 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 06:01:55,745 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 06:01:54" (1/3) ... [2021-12-16 06:01:55,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af6586c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 06:01:55, skipping insertion in model container [2021-12-16 06:01:55,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:01:55" (2/3) ... [2021-12-16 06:01:55,746 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7af6586c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 06:01:55, skipping insertion in model container [2021-12-16 06:01:55,746 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:01:55" (3/3) ... [2021-12-16 06:01:55,748 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2021-12-16 06:01:55,752 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 06:01:55,753 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2021-12-16 06:01:55,801 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 06:01:55,810 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=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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 [2021-12-16 06:01:55,810 INFO L340 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2021-12-16 06:01:55,839 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 25 states have (on average 1.92) internal successors, (48), 42 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:55,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-16 06:01:55,847 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:01:55,848 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-16 06:01:55,849 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 06:01:55,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:01:55,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1037516511, now seen corresponding path program 1 times [2021-12-16 06:01:55,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:01:55,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [596801411] [2021-12-16 06:01:55,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:01:55,867 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:01:55,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:01:55,869 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:01:55,870 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-16 06:01:55,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:01:55,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 06:01:55,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:01:56,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 06:01:56,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:01:56,133 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:01:56,134 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:01:56,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [596801411] [2021-12-16 06:01:56,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [596801411] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:01:56,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:01:56,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 06:01:56,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201790241] [2021-12-16 06:01:56,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:01:56,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 06:01:56,142 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:01:56,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 06:01:56,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 06:01:56,184 INFO L87 Difference]: Start difference. First operand has 44 states, 25 states have (on average 1.92) internal successors, (48), 42 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:56,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:01:56,485 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2021-12-16 06:01:56,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 06:01:56,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-16 06:01:56,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:01:56,492 INFO L225 Difference]: With dead ends: 74 [2021-12-16 06:01:56,492 INFO L226 Difference]: Without dead ends: 65 [2021-12-16 06:01:56,494 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 06:01:56,497 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 94 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 06:01:56,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 34 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 06:01:56,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-12-16 06:01:56,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2021-12-16 06:01:56,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 49 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:56,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2021-12-16 06:01:56,540 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 6 [2021-12-16 06:01:56,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:01:56,540 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2021-12-16 06:01:56,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:56,541 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2021-12-16 06:01:56,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-16 06:01:56,541 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:01:56,541 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-16 06:01:56,551 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-12-16 06:01:56,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:01:56,751 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 06:01:56,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:01:56,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1037516510, now seen corresponding path program 1 times [2021-12-16 06:01:56,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:01:56,752 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1945368833] [2021-12-16 06:01:56,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:01:56,753 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:01:56,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:01:56,756 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:01:56,758 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-16 06:01:56,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:01:56,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 06:01:56,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:01:56,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 06:01:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:01:56,875 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:01:56,875 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:01:56,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1945368833] [2021-12-16 06:01:56,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1945368833] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:01:56,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:01:56,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 06:01:56,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365597500] [2021-12-16 06:01:56,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:01:56,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 06:01:56,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:01:56,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 06:01:56,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 06:01:56,882 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:57,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:01:57,001 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2021-12-16 06:01:57,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 06:01:57,003 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-16 06:01:57,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:01:57,003 INFO L225 Difference]: With dead ends: 49 [2021-12-16 06:01:57,003 INFO L226 Difference]: Without dead ends: 49 [2021-12-16 06:01:57,004 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 06:01:57,005 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 59 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:01:57,005 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 17 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:01:57,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-16 06:01:57,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2021-12-16 06:01:57,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.4705882352941178) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:57,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-12-16 06:01:57,013 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 6 [2021-12-16 06:01:57,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:01:57,014 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-12-16 06:01:57,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:57,015 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-12-16 06:01:57,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-12-16 06:01:57,015 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:01:57,016 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:01:57,030 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-16 06:01:57,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:01:57,225 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 06:01:57,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:01:57,225 INFO L85 PathProgramCache]: Analyzing trace with hash 417959389, now seen corresponding path program 1 times [2021-12-16 06:01:57,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:01:57,226 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [815117809] [2021-12-16 06:01:57,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:01:57,226 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:01:57,226 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:01:57,229 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:01:57,230 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-16 06:01:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:01:57,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 06:01:57,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:01:57,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:01:57,336 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:01:57,336 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:01:57,336 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [815117809] [2021-12-16 06:01:57,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [815117809] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:01:57,337 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:01:57,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 06:01:57,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928661415] [2021-12-16 06:01:57,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:01:57,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 06:01:57,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:01:57,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 06:01:57,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 06:01:57,338 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:57,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:01:57,448 INFO L93 Difference]: Finished difference Result 51 states and 53 transitions. [2021-12-16 06:01:57,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 06:01:57,448 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-12-16 06:01:57,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:01:57,449 INFO L225 Difference]: With dead ends: 51 [2021-12-16 06:01:57,449 INFO L226 Difference]: Without dead ends: 51 [2021-12-16 06:01:57,450 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-16 06:01:57,451 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 57 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:01:57,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 35 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:01:57,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-12-16 06:01:57,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 46. [2021-12-16 06:01:57,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 34 states have (on average 1.4411764705882353) internal successors, (49), 45 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:57,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2021-12-16 06:01:57,455 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 11 [2021-12-16 06:01:57,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:01:57,456 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2021-12-16 06:01:57,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:57,456 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2021-12-16 06:01:57,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-12-16 06:01:57,456 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:01:57,456 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:01:57,471 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-12-16 06:01:57,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:01:57,666 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 06:01:57,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:01:57,667 INFO L85 PathProgramCache]: Analyzing trace with hash 71880067, now seen corresponding path program 1 times [2021-12-16 06:01:57,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:01:57,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1791633832] [2021-12-16 06:01:57,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:01:57,668 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:01:57,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:01:57,669 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:01:57,671 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-12-16 06:01:57,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:01:57,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2021-12-16 06:01:57,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:01:57,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-12-16 06:01:57,822 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-12-16 06:01:57,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 20 [2021-12-16 06:01:57,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-12-16 06:01:57,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:01:57,880 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:01:57,881 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:01:57,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1791633832] [2021-12-16 06:01:57,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1791633832] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:01:57,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:01:57,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-12-16 06:01:57,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702437724] [2021-12-16 06:01:57,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:01:57,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 06:01:57,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:01:57,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 06:01:57,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:01:57,883 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:58,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:01:58,148 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2021-12-16 06:01:58,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 06:01:58,149 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-12-16 06:01:58,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:01:58,150 INFO L225 Difference]: With dead ends: 82 [2021-12-16 06:01:58,150 INFO L226 Difference]: Without dead ends: 82 [2021-12-16 06:01:58,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-16 06:01:58,151 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 62 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 06:01:58,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 91 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 06:01:58,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-12-16 06:01:58,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 50. [2021-12-16 06:01:58,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.394736842105263) internal successors, (53), 49 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:58,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2021-12-16 06:01:58,157 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 12 [2021-12-16 06:01:58,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:01:58,157 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2021-12-16 06:01:58,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:58,158 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2021-12-16 06:01:58,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 06:01:58,158 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:01:58,159 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:01:58,174 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-12-16 06:01:58,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:01:58,359 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 06:01:58,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:01:58,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1327769707, now seen corresponding path program 1 times [2021-12-16 06:01:58,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:01:58,360 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [782588147] [2021-12-16 06:01:58,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:01:58,363 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:01:58,363 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:01:58,364 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:01:58,366 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-12-16 06:01:58,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:01:58,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2021-12-16 06:01:58,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:01:58,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 06:01:58,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 06:01:58,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 06:01:58,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 9 [2021-12-16 06:01:58,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 06:01:58,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:01:58,588 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:01:58,588 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:01:58,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [782588147] [2021-12-16 06:01:58,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [782588147] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:01:58,588 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:01:58,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 06:01:58,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720946408] [2021-12-16 06:01:58,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:01:58,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 06:01:58,589 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:01:58,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 06:01:58,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:01:58,590 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:58,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:01:58,923 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2021-12-16 06:01:58,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 06:01:58,923 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-16 06:01:58,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:01:58,924 INFO L225 Difference]: With dead ends: 60 [2021-12-16 06:01:58,924 INFO L226 Difference]: Without dead ends: 60 [2021-12-16 06:01:58,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-12-16 06:01:58,925 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 33 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 06:01:58,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 103 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 06:01:58,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-12-16 06:01:58,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 41. [2021-12-16 06:01:58,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:58,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-12-16 06:01:58,929 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 13 [2021-12-16 06:01:58,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:01:58,929 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-12-16 06:01:58,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:58,929 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-12-16 06:01:58,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 06:01:58,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:01:58,930 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:01:58,942 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-12-16 06:01:59,135 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:01:59,136 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 06:01:59,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:01:59,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1327769708, now seen corresponding path program 1 times [2021-12-16 06:01:59,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:01:59,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1009599134] [2021-12-16 06:01:59,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:01:59,137 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:01:59,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:01:59,138 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:01:59,139 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-12-16 06:01:59,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:01:59,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-12-16 06:01:59,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:01:59,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-12-16 06:01:59,225 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 06:01:59,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 12 [2021-12-16 06:01:59,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:01:59,265 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:01:59,265 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:01:59,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1009599134] [2021-12-16 06:01:59,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1009599134] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:01:59,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:01:59,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 06:01:59,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4293465] [2021-12-16 06:01:59,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:01:59,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 06:01:59,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:01:59,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 06:01:59,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:01:59,267 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:59,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:01:59,477 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2021-12-16 06:01:59,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 06:01:59,477 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-12-16 06:01:59,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:01:59,478 INFO L225 Difference]: With dead ends: 54 [2021-12-16 06:01:59,478 INFO L226 Difference]: Without dead ends: 54 [2021-12-16 06:01:59,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-12-16 06:01:59,479 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 32 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 06:01:59,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 85 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 06:01:59,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-12-16 06:01:59,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2021-12-16 06:01:59,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:59,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2021-12-16 06:01:59,482 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 13 [2021-12-16 06:01:59,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:01:59,482 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2021-12-16 06:01:59,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.6) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:01:59,483 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2021-12-16 06:01:59,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-16 06:01:59,483 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:01:59,484 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:01:59,495 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-12-16 06:01:59,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:01:59,693 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 06:01:59,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:01:59,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1804762195, now seen corresponding path program 1 times [2021-12-16 06:01:59,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:01:59,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1583963850] [2021-12-16 06:01:59,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:01:59,694 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:01:59,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:01:59,695 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:01:59,695 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-12-16 06:01:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:01:59,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 15 conjunts are in the unsatisfiable core [2021-12-16 06:01:59,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:01:59,786 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 06:01:59,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2021-12-16 06:01:59,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 06:01:59,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-12-16 06:01:59,923 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:01:59,923 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:01:59,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 29 [2021-12-16 06:02:00,012 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:02:00,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:02:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:02:00,032 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:02:00,032 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1583963850] [2021-12-16 06:02:00,032 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1583963850] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 06:02:00,032 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:02:00,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-12-16 06:02:00,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311248307] [2021-12-16 06:02:00,033 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:02:00,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 06:02:00,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:02:00,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 06:02:00,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:02:00,034 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:02:00,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:02:00,528 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-12-16 06:02:00,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-12-16 06:02:00,529 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-12-16 06:02:00,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:02:00,529 INFO L225 Difference]: With dead ends: 53 [2021-12-16 06:02:00,529 INFO L226 Difference]: Without dead ends: 53 [2021-12-16 06:02:00,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-12-16 06:02:00,531 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 30 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 06:02:00,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 79 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-12-16 06:02:00,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-12-16 06:02:00,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 41. [2021-12-16 06:02:00,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.2222222222222223) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:02:00,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2021-12-16 06:02:00,534 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 15 [2021-12-16 06:02:00,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:02:00,535 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2021-12-16 06:02:00,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:02:00,535 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2021-12-16 06:02:00,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-16 06:02:00,536 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:02:00,536 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:02:00,544 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-12-16 06:02:00,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:02:00,744 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 12 more)] === [2021-12-16 06:02:00,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:02:00,744 INFO L85 PathProgramCache]: Analyzing trace with hash -113054509, now seen corresponding path program 1 times [2021-12-16 06:02:00,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:02:00,745 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1602936753] [2021-12-16 06:02:00,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:02:00,745 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:02:00,745 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:02:00,747 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:02:00,748 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-12-16 06:02:00,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 06:02:00,801 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-16 06:02:00,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-16 06:02:00,847 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-12-16 06:02:00,847 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-16 06:02:00,848 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK (15 of 16 remaining) [2021-12-16 06:02:00,867 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION (14 of 16 remaining) [2021-12-16 06:02:00,867 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION (13 of 16 remaining) [2021-12-16 06:02:00,867 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION (12 of 16 remaining) [2021-12-16 06:02:00,868 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION (11 of 16 remaining) [2021-12-16 06:02:00,868 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION (10 of 16 remaining) [2021-12-16 06:02:00,868 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION (9 of 16 remaining) [2021-12-16 06:02:00,868 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6REQUIRES_VIOLATION (8 of 16 remaining) [2021-12-16 06:02:00,868 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION (7 of 16 remaining) [2021-12-16 06:02:00,868 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION (6 of 16 remaining) [2021-12-16 06:02:00,868 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr9REQUIRES_VIOLATION (5 of 16 remaining) [2021-12-16 06:02:00,868 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr10REQUIRES_VIOLATION (4 of 16 remaining) [2021-12-16 06:02:00,868 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr11REQUIRES_VIOLATION (3 of 16 remaining) [2021-12-16 06:02:00,869 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK (2 of 16 remaining) [2021-12-16 06:02:00,869 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr13REQUIRES_VIOLATION (1 of 16 remaining) [2021-12-16 06:02:00,869 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr14REQUIRES_VIOLATION (0 of 16 remaining) [2021-12-16 06:02:00,895 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (9)] Ended with exit code 0 [2021-12-16 06:02:01,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:02:01,098 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:02:01,102 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-16 06:02:01,119 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.12 06:02:01 BoogieIcfgContainer [2021-12-16 06:02:01,120 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-16 06:02:01,120 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-16 06:02:01,120 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-16 06:02:01,121 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-16 06:02:01,121 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:01:55" (3/4) ... [2021-12-16 06:02:01,124 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-12-16 06:02:01,124 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-16 06:02:01,124 INFO L158 Benchmark]: Toolchain (without parser) took 6419.83ms. Allocated memory was 52.4MB in the beginning and 75.5MB in the end (delta: 23.1MB). Free memory was 27.9MB in the beginning and 34.6MB in the end (delta: -6.7MB). Peak memory consumption was 14.4MB. Max. memory is 16.1GB. [2021-12-16 06:02:01,124 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 52.4MB. Free memory is still 34.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 06:02:01,125 INFO L158 Benchmark]: CACSL2BoogieTranslator took 409.00ms. Allocated memory was 52.4MB in the beginning and 62.9MB in the end (delta: 10.5MB). Free memory was 27.8MB in the beginning and 38.1MB in the end (delta: -10.3MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. [2021-12-16 06:02:01,125 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.70ms. Allocated memory is still 62.9MB. Free memory was 37.9MB in the beginning and 36.1MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 06:02:01,125 INFO L158 Benchmark]: Boogie Preprocessor took 40.89ms. Allocated memory is still 62.9MB. Free memory was 35.9MB in the beginning and 34.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 06:02:01,126 INFO L158 Benchmark]: RCFGBuilder took 536.69ms. Allocated memory is still 62.9MB. Free memory was 34.5MB in the beginning and 35.7MB in the end (delta: -1.2MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. [2021-12-16 06:02:01,126 INFO L158 Benchmark]: TraceAbstraction took 5377.60ms. Allocated memory was 62.9MB in the beginning and 75.5MB in the end (delta: 12.6MB). Free memory was 35.1MB in the beginning and 35.1MB in the end (delta: -744B). Peak memory consumption was 12.1MB. Max. memory is 16.1GB. [2021-12-16 06:02:01,126 INFO L158 Benchmark]: Witness Printer took 3.49ms. Allocated memory is still 75.5MB. Free memory was 35.1MB in the beginning and 34.6MB in the end (delta: 513.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 06:02:01,127 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 52.4MB. Free memory is still 34.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 409.00ms. Allocated memory was 52.4MB in the beginning and 62.9MB in the end (delta: 10.5MB). Free memory was 27.8MB in the beginning and 38.1MB in the end (delta: -10.3MB). Peak memory consumption was 5.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.70ms. Allocated memory is still 62.9MB. Free memory was 37.9MB in the beginning and 36.1MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 40.89ms. Allocated memory is still 62.9MB. Free memory was 35.9MB in the beginning and 34.5MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 536.69ms. Allocated memory is still 62.9MB. Free memory was 34.5MB in the beginning and 35.7MB in the end (delta: -1.2MB). Peak memory consumption was 13.0MB. Max. memory is 16.1GB. * TraceAbstraction took 5377.60ms. Allocated memory was 62.9MB in the beginning and 75.5MB in the end (delta: 12.6MB). Free memory was 35.1MB in the beginning and 35.1MB in the end (delta: -744B). Peak memory consumption was 12.1MB. Max. memory is 16.1GB. * Witness Printer took 3.49ms. Allocated memory is still 75.5MB. Free memory was 35.1MB in the beginning and 34.6MB in the end (delta: 513.8kB). There was no memory consumed. 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 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) VAL [a={6:0}] [L534] List t; [L535] List p = a; VAL [a={6:0}, p={6:0}] [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 1 VAL [a={6:0}, p={6:0}] [L544] p->n = 0 VAL [a={6:0}, p={6:0}] [L545] p = a VAL [a={6:0}, p={6:0}] [L546] COND TRUE p!=0 VAL [a={6:0}, p={6:0}] [L547] EXPR p->h VAL [a={6:0}, p={6:0}, p->h=1] [L547] COND FALSE !(p->h != 1) [L550] EXPR p->n VAL [a={6:0}, p={6:0}, p->n={0:0}] [L550] p = p->n [L546] COND FALSE !(p!=0) VAL [a={6:0}, p={0:0}] [L552] return 0; VAL [\result=0, a={6:0}, p={0:0}] - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 540]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 541]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 544]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 547]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 548]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 550]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 45 locations, 16 error locations. Started 1 CEGAR loops. OverallTime: 5.3s, OverallIterations: 8, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 367 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 367 mSDsluCounter, 444 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 277 mSDsCounter, 72 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 527 IncrementalHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 72 mSolverCounterUnsat, 167 mSDtfsCounter, 527 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 101 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred in iteration=1, InterpolantAutomatonStates: 43, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 102 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 92 NumberOfCodeBlocks, 92 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 83 ConstructedInterpolants, 0 QuantifiedInterpolants, 557 SizeOfPredicates, 31 NumberOfNonLiveVariables, 387 ConjunctsInSsa, 61 ConjunctsInUnsatCore, 8 InterpolantComputations, 6 PerfectInterpolantSequences, 4/6 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 could not prove your program: unable to determine feasibility of some traces [2021-12-16 06:02:01,160 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 Result: UNKNOWN: Overapproximated counterexample