./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/list-simple/sll2n_insert_equal.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-simple/sll2n_insert_equal.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 43bf83586090da08f52ccb7b612d2451c8f1efe9c820d873134ac51350c022e3 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 06:05:37,562 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 06:05:37,564 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 06:05:37,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 06:05:37,608 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 06:05:37,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 06:05:37,616 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 06:05:37,617 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 06:05:37,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 06:05:37,618 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 06:05:37,619 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 06:05:37,620 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 06:05:37,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 06:05:37,621 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 06:05:37,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 06:05:37,626 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 06:05:37,628 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 06:05:37,631 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 06:05:37,632 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 06:05:37,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 06:05:37,643 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 06:05:37,644 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 06:05:37,646 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 06:05:37,649 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 06:05:37,652 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 06:05:37,653 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 06:05:37,653 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 06:05:37,655 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 06:05:37,655 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 06:05:37,656 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 06:05:37,656 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 06:05:37,657 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 06:05:37,658 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 06:05:37,659 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 06:05:37,660 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 06:05:37,660 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 06:05:37,660 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 06:05:37,660 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 06:05:37,660 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 06:05:37,661 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 06:05:37,661 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 06:05:37,662 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2021-12-16 06:05:37,685 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 06:05:37,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 06:05:37,685 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 06:05:37,686 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 06:05:37,687 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 06:05:37,687 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 06:05:37,688 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 06:05:37,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 06:05:37,688 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 06:05:37,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 06:05:37,689 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 06:05:37,689 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 06:05:37,690 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 06:05:37,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 06:05:37,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 06:05:37,690 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 06:05:37,690 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 06:05:37,691 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 06:05:37,691 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 06:05:37,691 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 06:05:37,691 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 06:05:37,691 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 06:05:37,692 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 06:05:37,692 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 06:05:37,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 06:05:37,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 06:05:37,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 06:05:37,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 06:05:37,693 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-16 06:05:37,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-16 06:05:37,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 06:05:37,693 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43bf83586090da08f52ccb7b612d2451c8f1efe9c820d873134ac51350c022e3 [2021-12-16 06:05:37,915 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 06:05:37,949 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 06:05:37,952 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 06:05:37,953 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 06:05:37,954 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 06:05:37,955 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_insert_equal.i [2021-12-16 06:05:38,027 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79a1fac8e/11da0d476e434216af482455f4502122/FLAGc3030e29e [2021-12-16 06:05:38,468 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 06:05:38,469 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_insert_equal.i [2021-12-16 06:05:38,483 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79a1fac8e/11da0d476e434216af482455f4502122/FLAGc3030e29e [2021-12-16 06:05:38,827 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/79a1fac8e/11da0d476e434216af482455f4502122 [2021-12-16 06:05:38,832 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 06:05:38,834 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 06:05:38,835 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 06:05:38,835 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 06:05:38,842 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 06:05:38,842 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:05:38" (1/1) ... [2021-12-16 06:05:38,843 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@746c5ed9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:38, skipping insertion in model container [2021-12-16 06:05:38,844 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:05:38" (1/1) ... [2021-12-16 06:05:38,850 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 06:05:38,883 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 06:05:39,152 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-simple/sll2n_insert_equal.i[24301,24314] [2021-12-16 06:05:39,158 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:05:39,175 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 06:05:39,218 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-simple/sll2n_insert_equal.i[24301,24314] [2021-12-16 06:05:39,219 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:05:39,245 INFO L208 MainTranslator]: Completed translation [2021-12-16 06:05:39,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:39 WrapperNode [2021-12-16 06:05:39,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 06:05:39,248 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 06:05:39,248 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 06:05:39,248 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 06:05:39,255 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:39" (1/1) ... [2021-12-16 06:05:39,282 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:39" (1/1) ... [2021-12-16 06:05:39,315 INFO L137 Inliner]: procedures = 127, calls = 32, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 122 [2021-12-16 06:05:39,316 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 06:05:39,316 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 06:05:39,317 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 06:05:39,317 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 06:05:39,324 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:39" (1/1) ... [2021-12-16 06:05:39,324 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:39" (1/1) ... [2021-12-16 06:05:39,338 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:39" (1/1) ... [2021-12-16 06:05:39,338 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:39" (1/1) ... [2021-12-16 06:05:39,347 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:39" (1/1) ... [2021-12-16 06:05:39,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:39" (1/1) ... [2021-12-16 06:05:39,357 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:39" (1/1) ... [2021-12-16 06:05:39,360 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 06:05:39,361 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 06:05:39,361 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 06:05:39,361 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 06:05:39,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:39" (1/1) ... [2021-12-16 06:05:39,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 06:05:39,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:05:39,409 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 06:05:39,431 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 06:05:39,450 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-16 06:05:39,450 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-16 06:05:39,450 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-16 06:05:39,450 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-16 06:05:39,450 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 06:05:39,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 06:05:39,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 06:05:39,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 06:05:39,451 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 06:05:39,451 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 06:05:39,451 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-16 06:05:39,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-16 06:05:39,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 06:05:39,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 06:05:39,593 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 06:05:39,595 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 06:05:39,820 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 06:05:39,829 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 06:05:39,829 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-16 06:05:39,831 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:05:39 BoogieIcfgContainer [2021-12-16 06:05:39,831 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 06:05:39,834 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 06:05:39,834 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 06:05:39,837 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 06:05:39,837 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 06:05:38" (1/3) ... [2021-12-16 06:05:39,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3413edfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 06:05:39, skipping insertion in model container [2021-12-16 06:05:39,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:39" (2/3) ... [2021-12-16 06:05:39,838 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3413edfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 06:05:39, skipping insertion in model container [2021-12-16 06:05:39,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:05:39" (3/3) ... [2021-12-16 06:05:39,840 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_insert_equal.i [2021-12-16 06:05:39,844 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 06:05:39,844 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2021-12-16 06:05:39,892 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 06:05:39,903 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 06:05:39,903 INFO L340 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2021-12-16 06:05:39,919 INFO L276 IsEmpty]: Start isEmpty. Operand has 82 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 78 states have internal predecessors, (90), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:05:39,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 06:05:39,930 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:39,931 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:39,931 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-16 06:05:39,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:39,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1813843193, now seen corresponding path program 1 times [2021-12-16 06:05:39,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:05:39,941 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202032031] [2021-12-16 06:05:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:39,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:05:40,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:40,106 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 06:05:40,106 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:05:40,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202032031] [2021-12-16 06:05:40,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202032031] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:40,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:40,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 06:05:40,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641306304] [2021-12-16 06:05:40,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:40,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:05:40,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:05:40,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:05:40,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:05:40,142 INFO L87 Difference]: Start difference. First operand has 82 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 78 states have internal predecessors, (90), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:05:40,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:40,256 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-12-16 06:05:40,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:05:40,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 06:05:40,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:40,276 INFO L225 Difference]: With dead ends: 80 [2021-12-16 06:05:40,276 INFO L226 Difference]: Without dead ends: 77 [2021-12-16 06:05:40,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:05:40,281 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 8 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:40,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 126 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:05:40,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-16 06:05:40,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-12-16 06:05:40,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 73 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:05:40,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2021-12-16 06:05:40,311 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 7 [2021-12-16 06:05:40,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:40,311 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2021-12-16 06:05:40,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:05:40,312 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2021-12-16 06:05:40,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 06:05:40,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:40,312 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:40,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-16 06:05:40,313 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-16 06:05:40,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:40,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1813843194, now seen corresponding path program 1 times [2021-12-16 06:05:40,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:05:40,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668829536] [2021-12-16 06:05:40,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:40,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:05:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:40,360 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 06:05:40,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:05:40,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668829536] [2021-12-16 06:05:40,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668829536] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:40,361 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:40,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 06:05:40,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394364003] [2021-12-16 06:05:40,362 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:40,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:05:40,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:05:40,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:05:40,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:05:40,376 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:05:40,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:40,425 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2021-12-16 06:05:40,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:05:40,426 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 06:05:40,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:40,427 INFO L225 Difference]: With dead ends: 75 [2021-12-16 06:05:40,427 INFO L226 Difference]: Without dead ends: 75 [2021-12-16 06:05:40,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:05:40,431 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 4 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:40,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 126 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:05:40,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-16 06:05:40,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-12-16 06:05:40,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 45 states have (on average 1.711111111111111) internal successors, (77), 71 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:05:40,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2021-12-16 06:05:40,447 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 7 [2021-12-16 06:05:40,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:40,449 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2021-12-16 06:05:40,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:05:40,450 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2021-12-16 06:05:40,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 06:05:40,452 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:40,452 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:40,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-16 06:05:40,453 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-16 06:05:40,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:40,455 INFO L85 PathProgramCache]: Analyzing trace with hash 649951808, now seen corresponding path program 1 times [2021-12-16 06:05:40,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:05:40,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043468113] [2021-12-16 06:05:40,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:40,456 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:05:40,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:40,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 06:05:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:40,605 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 06:05:40,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:05:40,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043468113] [2021-12-16 06:05:40,605 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043468113] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:40,605 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:40,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 06:05:40,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49762325] [2021-12-16 06:05:40,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:40,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 06:05:40,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:05:40,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 06:05:40,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:05:40,607 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:05:40,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:40,833 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-12-16 06:05:40,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 06:05:40,834 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-16 06:05:40,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:40,836 INFO L225 Difference]: With dead ends: 79 [2021-12-16 06:05:40,839 INFO L226 Difference]: Without dead ends: 79 [2021-12-16 06:05:40,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-16 06:05:40,840 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 11 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:40,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 293 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 06:05:40,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-16 06:05:40,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2021-12-16 06:05:40,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 70 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:05:40,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2021-12-16 06:05:40,856 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 13 [2021-12-16 06:05:40,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:40,857 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2021-12-16 06:05:40,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:05:40,858 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2021-12-16 06:05:40,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 06:05:40,858 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:40,859 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:40,859 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-16 06:05:40,859 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-16 06:05:40,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:40,860 INFO L85 PathProgramCache]: Analyzing trace with hash 649951809, now seen corresponding path program 1 times [2021-12-16 06:05:40,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:05:40,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533140006] [2021-12-16 06:05:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:40,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:05:40,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:40,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 06:05:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:41,099 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 06:05:41,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:05:41,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533140006] [2021-12-16 06:05:41,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533140006] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:41,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:41,101 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-12-16 06:05:41,101 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059064669] [2021-12-16 06:05:41,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:41,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-12-16 06:05:41,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:05:41,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-12-16 06:05:41,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:05:41,103 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:05:41,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:41,300 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2021-12-16 06:05:41,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-12-16 06:05:41,301 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-16 06:05:41,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:41,302 INFO L225 Difference]: With dead ends: 78 [2021-12-16 06:05:41,302 INFO L226 Difference]: Without dead ends: 78 [2021-12-16 06:05:41,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-12-16 06:05:41,303 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 9 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:41,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 309 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-16 06:05:41,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-16 06:05:41,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2021-12-16 06:05:41,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 69 states have internal predecessors, (75), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:05:41,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2021-12-16 06:05:41,310 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 13 [2021-12-16 06:05:41,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:41,311 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2021-12-16 06:05:41,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:05:41,311 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2021-12-16 06:05:41,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-16 06:05:41,312 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:41,312 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:41,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-16 06:05:41,312 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-16 06:05:41,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:41,313 INFO L85 PathProgramCache]: Analyzing trace with hash 87749440, now seen corresponding path program 1 times [2021-12-16 06:05:41,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:05:41,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352416877] [2021-12-16 06:05:41,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:41,314 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:05:41,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:41,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2021-12-16 06:05:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:41,366 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 06:05:41,367 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:05:41,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352416877] [2021-12-16 06:05:41,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352416877] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:41,368 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:41,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-16 06:05:41,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742247466] [2021-12-16 06:05:41,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:41,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-16 06:05:41,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:05:41,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-16 06:05:41,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 06:05:41,370 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:05:41,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:41,436 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-12-16 06:05:41,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-16 06:05:41,437 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-16 06:05:41,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:41,441 INFO L225 Difference]: With dead ends: 79 [2021-12-16 06:05:41,441 INFO L226 Difference]: Without dead ends: 79 [2021-12-16 06:05:41,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-16 06:05:41,443 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 4 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:41,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 186 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:05:41,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-16 06:05:41,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2021-12-16 06:05:41,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 70 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:05:41,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2021-12-16 06:05:41,451 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 15 [2021-12-16 06:05:41,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:41,452 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2021-12-16 06:05:41,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:05:41,452 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2021-12-16 06:05:41,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 06:05:41,453 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:41,453 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:41,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-12-16 06:05:41,453 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-16 06:05:41,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:41,454 INFO L85 PathProgramCache]: Analyzing trace with hash -847170750, now seen corresponding path program 1 times [2021-12-16 06:05:41,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:05:41,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110220463] [2021-12-16 06:05:41,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:41,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:05:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:41,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 06:05:41,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:41,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2021-12-16 06:05:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:41,582 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 06:05:41,582 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:05:41,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110220463] [2021-12-16 06:05:41,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110220463] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:41,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128363161] [2021-12-16 06:05:41,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:41,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:05:41,583 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:05:41,591 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 06:05:41,606 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 06:05:41,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:41,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 06:05:41,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:41,799 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:05:41,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:05:41,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 06:05:41,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [128363161] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 06:05:41,860 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 06:05:41,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 6 [2021-12-16 06:05:41,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394209197] [2021-12-16 06:05:41,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 06:05:41,861 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 06:05:41,861 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:05:41,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 06:05:41,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:05:41,862 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 06:05:41,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:41,920 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-12-16 06:05:41,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 06:05:41,920 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-12-16 06:05:41,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:41,921 INFO L225 Difference]: With dead ends: 80 [2021-12-16 06:05:41,921 INFO L226 Difference]: Without dead ends: 80 [2021-12-16 06:05:41,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:05:41,922 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 8 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:41,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 255 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:05:41,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-12-16 06:05:41,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-12-16 06:05:41,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 51 states have (on average 1.588235294117647) internal successors, (81), 75 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:05:41,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2021-12-16 06:05:41,928 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 28 [2021-12-16 06:05:41,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:41,928 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2021-12-16 06:05:41,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 states have internal predecessors, (31), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 06:05:41,929 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2021-12-16 06:05:41,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 06:05:41,929 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:41,930 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:41,958 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 06:05:42,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-12-16 06:05:42,155 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-16 06:05:42,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:42,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1562281600, now seen corresponding path program 2 times [2021-12-16 06:05:42,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:05:42,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384039345] [2021-12-16 06:05:42,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:42,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:05:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:42,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 06:05:42,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:42,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 06:05:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:42,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 06:05:42,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 06:05:42,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:05:42,458 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384039345] [2021-12-16 06:05:42,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384039345] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:42,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451751126] [2021-12-16 06:05:42,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 06:05:42,459 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:05:42,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:05:42,464 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 06:05:42,492 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-16 06:05:42,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 06:05:42,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 06:05:42,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 35 conjunts are in the unsatisfiable core [2021-12-16 06:05:42,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:42,646 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 06:05:42,782 INFO L354 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2021-12-16 06:05:42,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2021-12-16 06:05:42,910 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 06:05:42,911 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 18 [2021-12-16 06:05:43,049 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-12-16 06:05:43,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 14 [2021-12-16 06:05:43,060 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-12-16 06:05:43,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:05:43,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451751126] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:43,511 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:05:43,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 17 [2021-12-16 06:05:43,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14833410] [2021-12-16 06:05:43,512 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:05:43,512 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-12-16 06:05:43,512 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:05:43,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-12-16 06:05:43,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-12-16 06:05:43,513 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 14 states have internal predecessors, (48), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-16 06:05:43,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:43,775 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2021-12-16 06:05:43,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-12-16 06:05:43,778 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 14 states have internal predecessors, (48), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 41 [2021-12-16 06:05:43,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:43,779 INFO L225 Difference]: With dead ends: 89 [2021-12-16 06:05:43,779 INFO L226 Difference]: Without dead ends: 89 [2021-12-16 06:05:43,779 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2021-12-16 06:05:43,780 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 97 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 115 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:43,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 385 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 230 Invalid, 0 Unknown, 115 Unchecked, 0.2s Time] [2021-12-16 06:05:43,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-12-16 06:05:43,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 77. [2021-12-16 06:05:43,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 51 states have (on average 1.5294117647058822) internal successors, (78), 72 states have internal predecessors, (78), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:05:43,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 84 transitions. [2021-12-16 06:05:43,785 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 84 transitions. Word has length 41 [2021-12-16 06:05:43,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:43,785 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 84 transitions. [2021-12-16 06:05:43,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.823529411764706) internal successors, (48), 14 states have internal predecessors, (48), 3 states have call successors, (4), 2 states have call predecessors, (4), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2021-12-16 06:05:43,785 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 84 transitions. [2021-12-16 06:05:43,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 06:05:43,786 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:43,786 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:43,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:43,986 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-16 06:05:43,987 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-16 06:05:43,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:43,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1562281601, now seen corresponding path program 1 times [2021-12-16 06:05:43,988 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-16 06:05:43,988 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587425522] [2021-12-16 06:05:43,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:43,988 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-16 06:05:44,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:44,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2021-12-16 06:05:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:44,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2021-12-16 06:05:44,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:44,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2021-12-16 06:05:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:44,258 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-12-16 06:05:44,258 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-16 06:05:44,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587425522] [2021-12-16 06:05:44,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587425522] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:44,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671637259] [2021-12-16 06:05:44,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:44,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:05:44,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:05:44,260 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 06:05:44,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-16 06:05:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:44,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 26 conjunts are in the unsatisfiable core [2021-12-16 06:05:44,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:44,419 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 06:05:44,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-12-16 06:05:44,588 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: line 43799 column 46: unknown constant v_#length_BEFORE_CALL_2 [2021-12-16 06:05:44,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-16 06:05:44,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2021-12-16 06:05:44,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356294965] [2021-12-16 06:05:44,589 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-16 06:05:44,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-12-16 06:05:44,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-16 06:05:44,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-12-16 06:05:44,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-16 06:05:44,592 INFO L87 Difference]: Start difference. First operand 77 states and 84 transitions. Second operand has 9 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 8 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:05:44,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-16 06:05:44,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-12-16 06:05:44,593 INFO L933 BasicCegarLoop]: 1 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, 1 SdHoareTripleChecker+Invalid, 1 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 06:05:44,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 1 Invalid, 1 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:05:44,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:44,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:05:44,804 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@1a9ca4b2 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:360) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:206) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:131) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker$ProtectedHtc.checkInternal(ChainingHoareTripleChecker.java:455) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ChainingHoareTripleChecker.checkInternal(ChainingHoareTripleChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:95) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:868) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:784) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-12-16 06:05:44,808 INFO L158 Benchmark]: Toolchain (without parser) took 5974.69ms. Allocated memory was 79.7MB in the beginning and 142.6MB in the end (delta: 62.9MB). Free memory was 46.4MB in the beginning and 81.8MB in the end (delta: -35.4MB). Peak memory consumption was 28.4MB. Max. memory is 16.1GB. [2021-12-16 06:05:44,809 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 79.7MB. Free memory was 50.0MB in the beginning and 49.9MB in the end (delta: 26.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 06:05:44,809 INFO L158 Benchmark]: CACSL2BoogieTranslator took 412.02ms. Allocated memory was 79.7MB in the beginning and 96.5MB in the end (delta: 16.8MB). Free memory was 46.2MB in the beginning and 65.1MB in the end (delta: -18.9MB). Peak memory consumption was 8.1MB. Max. memory is 16.1GB. [2021-12-16 06:05:44,809 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.86ms. Allocated memory is still 96.5MB. Free memory was 65.1MB in the beginning and 63.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-16 06:05:44,810 INFO L158 Benchmark]: Boogie Preprocessor took 43.63ms. Allocated memory is still 96.5MB. Free memory was 63.0MB in the beginning and 61.2MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2021-12-16 06:05:44,810 INFO L158 Benchmark]: RCFGBuilder took 470.58ms. Allocated memory is still 96.5MB. Free memory was 61.2MB in the beginning and 65.1MB in the end (delta: -3.9MB). Peak memory consumption was 15.0MB. Max. memory is 16.1GB. [2021-12-16 06:05:44,810 INFO L158 Benchmark]: TraceAbstraction took 4974.17ms. Allocated memory was 96.5MB in the beginning and 142.6MB in the end (delta: 46.1MB). Free memory was 64.6MB in the beginning and 81.8MB in the end (delta: -17.2MB). Peak memory consumption was 28.3MB. Max. memory is 16.1GB. [2021-12-16 06:05:44,812 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 79.7MB. Free memory was 50.0MB in the beginning and 49.9MB in the end (delta: 26.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 412.02ms. Allocated memory was 79.7MB in the beginning and 96.5MB in the end (delta: 16.8MB). Free memory was 46.2MB in the beginning and 65.1MB in the end (delta: -18.9MB). Peak memory consumption was 8.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 67.86ms. Allocated memory is still 96.5MB. Free memory was 65.1MB in the beginning and 63.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 43.63ms. Allocated memory is still 96.5MB. Free memory was 63.0MB in the beginning and 61.2MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 470.58ms. Allocated memory is still 96.5MB. Free memory was 61.2MB in the beginning and 65.1MB in the end (delta: -3.9MB). Peak memory consumption was 15.0MB. Max. memory is 16.1GB. * TraceAbstraction took 4974.17ms. Allocated memory was 96.5MB in the beginning and 142.6MB in the end (delta: 46.1MB). Free memory was 64.6MB in the beginning and 81.8MB in the end (delta: -17.2MB). Peak memory consumption was 28.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@1a9ca4b2 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.MonolithicImplicationChecker@1a9ca4b2: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-16 06:05:44,827 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 1 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-simple/sll2n_insert_equal.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 43bf83586090da08f52ccb7b612d2451c8f1efe9c820d873134ac51350c022e3 --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-16 06:05:46,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-16 06:05:46,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-16 06:05:46,881 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-16 06:05:46,882 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-16 06:05:46,886 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-16 06:05:46,889 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-16 06:05:46,895 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-16 06:05:46,898 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-16 06:05:46,904 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-16 06:05:46,905 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-16 06:05:46,909 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-16 06:05:46,910 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-16 06:05:46,912 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-16 06:05:46,914 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-16 06:05:46,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-16 06:05:46,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-16 06:05:46,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-16 06:05:46,923 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-16 06:05:46,929 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-16 06:05:46,932 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-16 06:05:46,933 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-16 06:05:46,934 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-16 06:05:46,940 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-16 06:05:46,944 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-16 06:05:46,945 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-16 06:05:46,945 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-16 06:05:46,947 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-16 06:05:46,947 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-16 06:05:46,948 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-16 06:05:46,948 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-16 06:05:46,949 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-16 06:05:46,950 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-16 06:05:46,951 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-16 06:05:46,952 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-16 06:05:46,952 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-16 06:05:46,953 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-16 06:05:46,953 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-16 06:05:46,953 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-16 06:05:46,955 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-16 06:05:46,956 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-16 06:05:46,960 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2021-12-16 06:05:47,000 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-16 06:05:47,000 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-16 06:05:47,001 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-16 06:05:47,001 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-16 06:05:47,002 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-16 06:05:47,003 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-16 06:05:47,004 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-16 06:05:47,004 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-16 06:05:47,004 INFO L138 SettingsManager]: * Use SBE=true [2021-12-16 06:05:47,004 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-16 06:05:47,004 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-16 06:05:47,005 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-12-16 06:05:47,005 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-16 06:05:47,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-16 06:05:47,005 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-16 06:05:47,005 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-12-16 06:05:47,005 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-12-16 06:05:47,006 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-12-16 06:05:47,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-16 06:05:47,006 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-16 06:05:47,006 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-16 06:05:47,006 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-16 06:05:47,006 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-16 06:05:47,006 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-16 06:05:47,006 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-16 06:05:47,007 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-16 06:05:47,007 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-16 06:05:47,007 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 06:05:47,007 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-16 06:05:47,007 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-16 06:05:47,007 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-16 06:05:47,008 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-16 06:05:47,008 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-16 06:05:47,008 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-16 06:05:47,008 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 43bf83586090da08f52ccb7b612d2451c8f1efe9c820d873134ac51350c022e3 [2021-12-16 06:05:47,330 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-16 06:05:47,362 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-16 06:05:47,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-16 06:05:47,365 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-16 06:05:47,366 INFO L275 PluginConnector]: CDTParser initialized [2021-12-16 06:05:47,368 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/list-simple/sll2n_insert_equal.i [2021-12-16 06:05:47,431 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39fb880b2/0534fadcc74c474788649b7379a8957b/FLAGe5a5796ae [2021-12-16 06:05:47,997 INFO L306 CDTParser]: Found 1 translation units. [2021-12-16 06:05:47,998 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/list-simple/sll2n_insert_equal.i [2021-12-16 06:05:48,011 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39fb880b2/0534fadcc74c474788649b7379a8957b/FLAGe5a5796ae [2021-12-16 06:05:48,395 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39fb880b2/0534fadcc74c474788649b7379a8957b [2021-12-16 06:05:48,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-16 06:05:48,400 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-16 06:05:48,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-16 06:05:48,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-16 06:05:48,404 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-16 06:05:48,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:05:48" (1/1) ... [2021-12-16 06:05:48,406 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3748c8ad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:48, skipping insertion in model container [2021-12-16 06:05:48,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.12 06:05:48" (1/1) ... [2021-12-16 06:05:48,413 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-16 06:05:48,457 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-16 06:05:48,761 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-simple/sll2n_insert_equal.i[24301,24314] [2021-12-16 06:05:48,763 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:05:48,780 INFO L203 MainTranslator]: Completed pre-run [2021-12-16 06:05:48,835 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-simple/sll2n_insert_equal.i[24301,24314] [2021-12-16 06:05:48,838 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-16 06:05:48,872 INFO L208 MainTranslator]: Completed translation [2021-12-16 06:05:48,873 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:48 WrapperNode [2021-12-16 06:05:48,873 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-16 06:05:48,874 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-16 06:05:48,874 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-16 06:05:48,875 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-16 06:05:48,880 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:48" (1/1) ... [2021-12-16 06:05:48,915 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:48" (1/1) ... [2021-12-16 06:05:48,945 INFO L137 Inliner]: procedures = 130, calls = 32, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 123 [2021-12-16 06:05:48,945 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-16 06:05:48,947 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-16 06:05:48,947 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-16 06:05:48,947 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-16 06:05:48,954 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:48" (1/1) ... [2021-12-16 06:05:48,955 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:48" (1/1) ... [2021-12-16 06:05:48,967 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:48" (1/1) ... [2021-12-16 06:05:48,968 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:48" (1/1) ... [2021-12-16 06:05:48,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:48" (1/1) ... [2021-12-16 06:05:48,994 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:48" (1/1) ... [2021-12-16 06:05:49,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:48" (1/1) ... [2021-12-16 06:05:49,009 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-16 06:05:49,011 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-16 06:05:49,011 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-16 06:05:49,011 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-16 06:05:49,012 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:48" (1/1) ... [2021-12-16 06:05:49,018 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-16 06:05:49,027 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:05:49,045 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 06:05:49,065 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 06:05:49,079 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-12-16 06:05:49,079 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2021-12-16 06:05:49,079 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2021-12-16 06:05:49,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-16 06:05:49,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-16 06:05:49,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-16 06:05:49,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-16 06:05:49,080 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-16 06:05:49,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-16 06:05:49,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-12-16 06:05:49,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-16 06:05:49,080 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-16 06:05:49,080 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-16 06:05:49,080 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-16 06:05:49,238 INFO L236 CfgBuilder]: Building ICFG [2021-12-16 06:05:49,239 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-16 06:05:49,626 INFO L277 CfgBuilder]: Performing block encoding [2021-12-16 06:05:49,632 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-16 06:05:49,632 INFO L301 CfgBuilder]: Removed 4 assume(true) statements. [2021-12-16 06:05:49,634 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:05:49 BoogieIcfgContainer [2021-12-16 06:05:49,634 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-16 06:05:49,636 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-16 06:05:49,636 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-16 06:05:49,639 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-16 06:05:49,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.12 06:05:48" (1/3) ... [2021-12-16 06:05:49,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473efd0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 06:05:49, skipping insertion in model container [2021-12-16 06:05:49,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.12 06:05:48" (2/3) ... [2021-12-16 06:05:49,640 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@473efd0b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.12 06:05:49, skipping insertion in model container [2021-12-16 06:05:49,640 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.12 06:05:49" (3/3) ... [2021-12-16 06:05:49,641 INFO L111 eAbstractionObserver]: Analyzing ICFG sll2n_insert_equal.i [2021-12-16 06:05:49,646 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-16 06:05:49,652 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 31 error locations. [2021-12-16 06:05:49,698 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-16 06:05:49,704 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 06:05:49,704 INFO L340 AbstractCegarLoop]: Starting to check reachability of 31 error locations. [2021-12-16 06:05:49,732 INFO L276 IsEmpty]: Start isEmpty. Operand has 82 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 78 states have internal predecessors, (90), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:05:49,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 06:05:49,738 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:49,739 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:49,739 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-16 06:05:49,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:49,744 INFO L85 PathProgramCache]: Analyzing trace with hash 1813843193, now seen corresponding path program 1 times [2021-12-16 06:05:49,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:49,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [222662991] [2021-12-16 06:05:49,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:49,755 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:49,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:49,763 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 06:05:49,770 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 06:05:49,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:49,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-16 06:05:49,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:49,956 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 06:05:49,981 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 06:05:49,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:05:49,982 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:49,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [222662991] [2021-12-16 06:05:49,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [222662991] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:49,983 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:49,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 06:05:49,985 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236278223] [2021-12-16 06:05:49,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:49,990 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:05:49,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:50,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:05:50,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:05:50,016 INFO L87 Difference]: Start difference. First operand has 82 states, 47 states have (on average 1.9148936170212767) internal successors, (90), 78 states have internal predecessors, (90), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:05:50,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:50,152 INFO L93 Difference]: Finished difference Result 80 states and 87 transitions. [2021-12-16 06:05:50,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:05:50,154 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 06:05:50,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:50,160 INFO L225 Difference]: With dead ends: 80 [2021-12-16 06:05:50,160 INFO L226 Difference]: Without dead ends: 77 [2021-12-16 06:05:50,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:05:50,164 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 8 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:50,165 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 126 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:05:50,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-12-16 06:05:50,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-12-16 06:05:50,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 45 states have (on average 1.7555555555555555) internal successors, (79), 73 states have internal predecessors, (79), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:05:50,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 83 transitions. [2021-12-16 06:05:50,201 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 83 transitions. Word has length 7 [2021-12-16 06:05:50,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:50,201 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 83 transitions. [2021-12-16 06:05:50,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:05:50,202 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 83 transitions. [2021-12-16 06:05:50,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-16 06:05:50,202 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:50,202 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:50,217 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-16 06:05:50,417 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 06:05:50,417 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-16 06:05:50,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:50,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1813843194, now seen corresponding path program 1 times [2021-12-16 06:05:50,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:50,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [990412761] [2021-12-16 06:05:50,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:50,419 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:50,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:50,421 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 06:05:50,422 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 06:05:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:50,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 06:05:50,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:50,506 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 06:05:50,534 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 06:05:50,534 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:05:50,534 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:50,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [990412761] [2021-12-16 06:05:50,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [990412761] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:50,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:50,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-16 06:05:50,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742756642] [2021-12-16 06:05:50,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:50,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:05:50,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:50,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:05:50,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:05:50,544 INFO L87 Difference]: Start difference. First operand 77 states and 83 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:05:50,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:50,698 INFO L93 Difference]: Finished difference Result 75 states and 81 transitions. [2021-12-16 06:05:50,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:05:50,699 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 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 06:05:50,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:50,700 INFO L225 Difference]: With dead ends: 75 [2021-12-16 06:05:50,700 INFO L226 Difference]: Without dead ends: 75 [2021-12-16 06:05:50,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:05:50,701 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 4 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:50,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4 Valid, 126 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-16 06:05:50,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-12-16 06:05:50,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-12-16 06:05:50,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 45 states have (on average 1.711111111111111) internal successors, (77), 71 states have internal predecessors, (77), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:05:50,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2021-12-16 06:05:50,720 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 7 [2021-12-16 06:05:50,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:50,721 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2021-12-16 06:05:50,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-16 06:05:50,721 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2021-12-16 06:05:50,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 06:05:50,721 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:50,722 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:50,744 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 06:05:50,930 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 06:05:50,930 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-16 06:05:50,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:50,931 INFO L85 PathProgramCache]: Analyzing trace with hash 649951808, now seen corresponding path program 1 times [2021-12-16 06:05:50,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:50,932 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1948822617] [2021-12-16 06:05:50,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:50,932 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:50,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:50,935 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 06:05:50,937 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 06:05:50,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:51,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-16 06:05:51,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:51,039 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 06:05:51,091 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 06:05:51,092 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:05:51,092 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:51,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1948822617] [2021-12-16 06:05:51,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1948822617] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:51,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:51,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 06:05:51,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249679863] [2021-12-16 06:05:51,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:51,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 06:05:51,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:51,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 06:05:51,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:05:51,094 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:05:51,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:51,388 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-12-16 06:05:51,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 06:05:51,389 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-16 06:05:51,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:51,391 INFO L225 Difference]: With dead ends: 79 [2021-12-16 06:05:51,391 INFO L226 Difference]: Without dead ends: 79 [2021-12-16 06:05:51,392 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:05:51,392 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 10 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:51,393 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 261 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 06:05:51,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-16 06:05:51,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2021-12-16 06:05:51,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 70 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:05:51,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2021-12-16 06:05:51,401 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 13 [2021-12-16 06:05:51,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:51,402 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2021-12-16 06:05:51,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:05:51,402 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2021-12-16 06:05:51,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-16 06:05:51,403 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:51,403 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:51,415 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 06:05:51,613 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 06:05:51,613 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-16 06:05:51,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:51,613 INFO L85 PathProgramCache]: Analyzing trace with hash 649951809, now seen corresponding path program 1 times [2021-12-16 06:05:51,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:51,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [512548668] [2021-12-16 06:05:51,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:51,614 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:51,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:51,615 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 06:05:51,616 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 06:05:51,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:51,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-12-16 06:05:51,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:51,716 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 06:05:51,807 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 06:05:51,807 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:05:51,808 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:51,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [512548668] [2021-12-16 06:05:51,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [512548668] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:51,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:51,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-16 06:05:51,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039302813] [2021-12-16 06:05:51,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:51,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 06:05:51,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:51,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 06:05:51,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:05:51,810 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:05:52,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:52,099 INFO L93 Difference]: Finished difference Result 78 states and 87 transitions. [2021-12-16 06:05:52,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-16 06:05:52,100 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2021-12-16 06:05:52,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:52,101 INFO L225 Difference]: With dead ends: 78 [2021-12-16 06:05:52,101 INFO L226 Difference]: Without dead ends: 78 [2021-12-16 06:05:52,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-12-16 06:05:52,102 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 9 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:52,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 277 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-12-16 06:05:52,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-12-16 06:05:52,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 73. [2021-12-16 06:05:52,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 69 states have internal predecessors, (75), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:05:52,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 79 transitions. [2021-12-16 06:05:52,107 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 79 transitions. Word has length 13 [2021-12-16 06:05:52,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:52,108 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 79 transitions. [2021-12-16 06:05:52,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:05:52,108 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 79 transitions. [2021-12-16 06:05:52,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-12-16 06:05:52,109 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:52,109 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:52,118 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 06:05:52,318 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 06:05:52,318 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-16 06:05:52,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:52,320 INFO L85 PathProgramCache]: Analyzing trace with hash 87749440, now seen corresponding path program 1 times [2021-12-16 06:05:52,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:52,320 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [109631449] [2021-12-16 06:05:52,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:52,324 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:52,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:52,325 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 06:05:52,327 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 06:05:52,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:52,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-16 06:05:52,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:52,450 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 06:05:52,450 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-16 06:05:52,450 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:52,450 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [109631449] [2021-12-16 06:05:52,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [109631449] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-16 06:05:52,450 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-16 06:05:52,451 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-16 06:05:52,451 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621254552] [2021-12-16 06:05:52,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-16 06:05:52,451 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-16 06:05:52,451 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:52,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-16 06:05:52,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:05:52,452 INFO L87 Difference]: Start difference. First operand 73 states and 79 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:05:52,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:52,462 INFO L93 Difference]: Finished difference Result 79 states and 86 transitions. [2021-12-16 06:05:52,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-16 06:05:52,464 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2021-12-16 06:05:52,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:52,465 INFO L225 Difference]: With dead ends: 79 [2021-12-16 06:05:52,465 INFO L226 Difference]: Without dead ends: 79 [2021-12-16 06:05:52,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-16 06:05:52,466 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 4 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 153 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:52,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 153 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:05:52,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-12-16 06:05:52,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 74. [2021-12-16 06:05:52,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 46 states have (on average 1.6521739130434783) internal successors, (76), 70 states have internal predecessors, (76), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-12-16 06:05:52,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2021-12-16 06:05:52,471 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 15 [2021-12-16 06:05:52,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:52,472 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2021-12-16 06:05:52,472 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-12-16 06:05:52,472 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2021-12-16 06:05:52,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-12-16 06:05:52,472 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:52,473 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:52,485 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 06:05:52,679 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 06:05:52,680 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-16 06:05:52,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:52,680 INFO L85 PathProgramCache]: Analyzing trace with hash -847170750, now seen corresponding path program 1 times [2021-12-16 06:05:52,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:52,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639266740] [2021-12-16 06:05:52,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:05:52,681 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:52,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:52,682 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 06:05:52,682 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 06:05:52,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:05:52,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-16 06:05:52,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:52,847 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 7 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:05:52,848 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:05:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-12-16 06:05:52,939 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:52,942 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639266740] [2021-12-16 06:05:52,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639266740] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 06:05:52,942 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:05:52,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-16 06:05:52,942 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834065340] [2021-12-16 06:05:52,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:05:52,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-16 06:05:52,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:05:52,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-16 06:05:52,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:05:52,944 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 06:05:52,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:05:52,976 INFO L93 Difference]: Finished difference Result 85 states and 93 transitions. [2021-12-16 06:05:52,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-12-16 06:05:52,977 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) Word has length 28 [2021-12-16 06:05:52,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:05:52,978 INFO L225 Difference]: With dead ends: 85 [2021-12-16 06:05:52,978 INFO L226 Difference]: Without dead ends: 85 [2021-12-16 06:05:52,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-12-16 06:05:52,979 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 11 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-16 06:05:52,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 305 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-16 06:05:52,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-16 06:05:52,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 80. [2021-12-16 06:05:52,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 51 states have (on average 1.588235294117647) internal successors, (81), 75 states have internal predecessors, (81), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:05:52,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 87 transitions. [2021-12-16 06:05:52,984 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 87 transitions. Word has length 28 [2021-12-16 06:05:52,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:05:52,985 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 87 transitions. [2021-12-16 06:05:52,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 6 states have internal predecessors, (31), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2021-12-16 06:05:52,985 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 87 transitions. [2021-12-16 06:05:52,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 06:05:52,986 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:05:52,986 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:05:52,995 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 06:05:53,195 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 06:05:53,196 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-16 06:05:53,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:05:53,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1562281600, now seen corresponding path program 2 times [2021-12-16 06:05:53,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:05:53,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1734397487] [2021-12-16 06:05:53,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 06:05:53,197 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:05:53,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:05:53,198 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 06:05:53,198 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 06:05:53,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 06:05:53,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 06:05:53,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 19 conjunts are in the unsatisfiable core [2021-12-16 06:05:53,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:53,442 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 06:05:53,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 6 [2021-12-16 06:05:53,688 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-16 06:05:53,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-16 06:05:53,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 6 [2021-12-16 06:05:53,915 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:53,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-16 06:05:54,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 6 [2021-12-16 06:05:56,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:05:56,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 17 [2021-12-16 06:05:56,524 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 14 proven. 6 refuted. 6 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 06:05:56,524 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:05:56,615 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:05:56,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1734397487] [2021-12-16 06:05:56,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1734397487] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:05:56,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1928626978] [2021-12-16 06:05:56,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 06:05:56,615 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-16 06:05:56,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-16 06:05:56,617 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-16 06:05:56,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-12-16 06:05:56,848 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-16 06:05:56,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218076536] [2021-12-16 06:05:56,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-16 06:05:56,848 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:05:56,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-16 06:05:56,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 1 [2021-12-16 06:05:56,860 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-16 06:05:56,863 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-16 06:05:57,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-16 06:05:57,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-16 06:05:57,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 17 conjunts are in the unsatisfiable core [2021-12-16 06:05:57,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:05:57,047 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 06:05:59,207 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-12-16 06:05:59,207 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 27 [2021-12-16 06:06:03,402 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-16 06:06:03,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 15 treesize of output 20 [2021-12-16 06:06:05,567 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-12-16 06:06:05,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 14 treesize of output 19 [2021-12-16 06:06:05,593 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 10 times theorem prover too weak. 15 trivial. 0 not checked. [2021-12-16 06:06:05,593 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:06:06,285 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-12-16 06:06:06,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218076536] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-16 06:06:06,286 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-12-16 06:06:06,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7, 5] total 18 [2021-12-16 06:06:06,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533756859] [2021-12-16 06:06:06,286 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-12-16 06:06:06,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 06:06:06,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:06:06,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 06:06:06,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=305, Unknown=4, NotChecked=0, Total=380 [2021-12-16 06:06:06,287 INFO L87 Difference]: Start difference. First operand 80 states and 87 transitions. Second operand has 19 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-16 06:06:20,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:06:20,917 INFO L93 Difference]: Finished difference Result 132 states and 142 transitions. [2021-12-16 06:06:20,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-16 06:06:20,917 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 41 [2021-12-16 06:06:20,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:06:20,918 INFO L225 Difference]: With dead ends: 132 [2021-12-16 06:06:20,918 INFO L226 Difference]: Without dead ends: 132 [2021-12-16 06:06:20,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 92 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=126, Invalid=518, Unknown=6, NotChecked=0, Total=650 [2021-12-16 06:06:20,919 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 70 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 247 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 06:06:20,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 846 Invalid, 505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 254 Invalid, 0 Unknown, 247 Unchecked, 0.4s Time] [2021-12-16 06:06:20,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-12-16 06:06:20,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 85. [2021-12-16 06:06:20,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 57 states have (on average 1.4912280701754386) internal successors, (85), 79 states have internal predecessors, (85), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:06:20,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 91 transitions. [2021-12-16 06:06:20,925 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 91 transitions. Word has length 41 [2021-12-16 06:06:20,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:06:20,926 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 91 transitions. [2021-12-16 06:06:20,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-12-16 06:06:20,926 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 91 transitions. [2021-12-16 06:06:20,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-12-16 06:06:20,927 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:06:20,927 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:06:20,938 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 06:06:21,155 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-16 06:06:21,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-16 06:06:21,336 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-16 06:06:21,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:06:21,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1562281601, now seen corresponding path program 1 times [2021-12-16 06:06:21,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:06:21,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1895176037] [2021-12-16 06:06:21,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:06:21,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:06:21,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:06:21,338 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:06:21,344 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-12-16 06:06:21,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:06:21,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 25 conjunts are in the unsatisfiable core [2021-12-16 06:06:21,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:06:21,537 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 06:06:21,544 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 06:06:21,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-12-16 06:06:21,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 8 treesize of output 6 [2021-12-16 06:06:23,747 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:06:23,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 06:06:23,760 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-12-16 06:06:23,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 14 [2021-12-16 06:06:23,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-12-16 06:06:26,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:06:26,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 06:06:26,304 INFO L354 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2021-12-16 06:06:26,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 12 treesize of output 18 [2021-12-16 06:06:26,406 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-16 06:06:26,406 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:06:26,679 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:06:26,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1895176037] [2021-12-16 06:06:26,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1895176037] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:06:26,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1154712825] [2021-12-16 06:06:26,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:06:26,680 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-16 06:06:26,680 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-16 06:06:26,681 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-16 06:06:26,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-12-16 06:06:26,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:06:26,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 24 conjunts are in the unsatisfiable core [2021-12-16 06:06:27,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:06:27,017 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 06:06:27,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-12-16 06:06:27,229 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:06:27,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 06:06:27,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-12-16 06:06:29,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:06:29,726 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 06:06:30,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 5 treesize of output 3 [2021-12-16 06:06:30,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:06:30,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 14 [2021-12-16 06:06:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-12-16 06:06:30,215 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:06:30,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1154712825] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:06:30,406 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:06:30,406 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 18 [2021-12-16 06:06:30,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337277589] [2021-12-16 06:06:30,407 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:06:30,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-12-16 06:06:30,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:06:30,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-12-16 06:06:30,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=395, Unknown=3, NotChecked=0, Total=462 [2021-12-16 06:06:30,408 INFO L87 Difference]: Start difference. First operand 85 states and 91 transitions. Second operand has 19 states, 17 states have (on average 3.176470588235294) internal successors, (54), 14 states have internal predecessors, (54), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-16 06:06:33,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:06:33,276 INFO L93 Difference]: Finished difference Result 91 states and 96 transitions. [2021-12-16 06:06:33,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-16 06:06:33,277 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 17 states have (on average 3.176470588235294) internal successors, (54), 14 states have internal predecessors, (54), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) Word has length 41 [2021-12-16 06:06:33,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:06:33,278 INFO L225 Difference]: With dead ends: 91 [2021-12-16 06:06:33,278 INFO L226 Difference]: Without dead ends: 91 [2021-12-16 06:06:33,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=106, Invalid=646, Unknown=4, NotChecked=0, Total=756 [2021-12-16 06:06:33,279 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 5 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 645 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 177 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-16 06:06:33,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 645 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 190 Invalid, 0 Unknown, 177 Unchecked, 0.4s Time] [2021-12-16 06:06:33,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-12-16 06:06:33,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-12-16 06:06:33,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 63 states have (on average 1.4285714285714286) internal successors, (90), 84 states have internal predecessors, (90), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:06:33,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2021-12-16 06:06:33,284 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 41 [2021-12-16 06:06:33,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:06:33,284 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2021-12-16 06:06:33,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 17 states have (on average 3.176470588235294) internal successors, (54), 14 states have internal predecessors, (54), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (6), 6 states have call predecessors, (6), 5 states have call successors, (6) [2021-12-16 06:06:33,284 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2021-12-16 06:06:33,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-16 06:06:33,285 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:06:33,285 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:06:33,299 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-12-16 06:06:33,489 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-12-16 06:06:33,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3,12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt [2021-12-16 06:06:33,687 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-16 06:06:33,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:06:33,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1665526433, now seen corresponding path program 1 times [2021-12-16 06:06:33,687 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:06:33,688 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1156135235] [2021-12-16 06:06:33,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:06:33,688 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:06:33,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:06:33,689 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:06:33,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-12-16 06:06:33,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:06:33,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-16 06:06:33,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:06:33,977 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 06:06:34,081 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 6 treesize of output 5 [2021-12-16 06:06:34,175 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 12 treesize of output 8 [2021-12-16 06:06:34,291 WARN L860 $PredicateComparison]: unable to prove that (and (exists ((v_ArrVal_464 (_ BitVec 1))) (and (= |c_#valid| (store |c_old(#valid)| |c_node_create_~temp~0#1.base| v_ArrVal_464)) (= (_ bv0 1) (bvadd (bvneg v_ArrVal_464) (_ bv1 1))))) (exists ((v_ArrVal_465 (Array (_ BitVec 32) (_ BitVec 32)))) (= |c_#memory_$Pointer$.base| (store |c_old(#memory_$Pointer$.base)| |c_node_create_~temp~0#1.base| v_ArrVal_465))) (bvult |c_node_create_~temp~0#1.base| |c_#StackHeapBarrier|) (not (= (_ bv0 32) (bvadd |c_#StackHeapBarrier| (_ bv1 32))))) is different from true [2021-12-16 06:06:34,457 INFO L354 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2021-12-16 06:06:34,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 19 treesize of output 24 [2021-12-16 06:06:34,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:06:34,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2021-12-16 06:06:34,561 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 13 [2021-12-16 06:06:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 21 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 2 not checked. [2021-12-16 06:06:34,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:06:35,069 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:06:35,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1156135235] [2021-12-16 06:06:35,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1156135235] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:06:35,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [130878064] [2021-12-16 06:06:35,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:06:35,070 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-16 06:06:35,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-16 06:06:35,071 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-16 06:06:35,072 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-12-16 06:06:35,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:06:35,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 27 conjunts are in the unsatisfiable core [2021-12-16 06:06:35,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:06:35,481 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 06:06:35,860 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 12 treesize of output 8 [2021-12-16 06:06:36,255 INFO L354 Elim1Store]: treesize reduction 27, result has 43.8 percent of original size [2021-12-16 06:06:36,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 35 [2021-12-16 06:06:36,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:06:36,269 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-12-16 06:06:36,418 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 29 treesize of output 17 [2021-12-16 06:06:36,537 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 06:06:36,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:06:36,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [130878064] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:06:36,724 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-16 06:06:36,725 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 29 [2021-12-16 06:06:36,725 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881112796] [2021-12-16 06:06:36,725 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-16 06:06:36,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-12-16 06:06:36,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-16 06:06:36,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-12-16 06:06:36,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=868, Unknown=15, NotChecked=60, Total=1056 [2021-12-16 06:06:36,726 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand has 30 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-16 06:06:37,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-16 06:06:37,703 INFO L93 Difference]: Finished difference Result 98 states and 108 transitions. [2021-12-16 06:06:37,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-12-16 06:06:37,704 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 44 [2021-12-16 06:06:37,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-16 06:06:37,705 INFO L225 Difference]: With dead ends: 98 [2021-12-16 06:06:37,705 INFO L226 Difference]: Without dead ends: 98 [2021-12-16 06:06:37,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=183, Invalid=1361, Unknown=20, NotChecked=76, Total=1640 [2021-12-16 06:06:37,706 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 21 mSDsluCounter, 676 mSDsCounter, 0 mSdLazyCounter, 292 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 280 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-16 06:06:37,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 733 Invalid, 576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 292 Invalid, 0 Unknown, 280 Unchecked, 0.5s Time] [2021-12-16 06:06:37,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-12-16 06:06:37,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2021-12-16 06:06:37,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 65 states have (on average 1.4461538461538461) internal successors, (94), 86 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-16 06:06:37,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 100 transitions. [2021-12-16 06:06:37,726 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 100 transitions. Word has length 44 [2021-12-16 06:06:37,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-16 06:06:37,726 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 100 transitions. [2021-12-16 06:06:37,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 2.259259259259259) internal successors, (61), 27 states have internal predecessors, (61), 4 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-16 06:06:37,727 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 100 transitions. [2021-12-16 06:06:37,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-12-16 06:06:37,727 INFO L506 BasicCegarLoop]: Found error trace [2021-12-16 06:06:37,728 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-16 06:06:37,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-12-16 06:06:37,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-12-16 06:06:38,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-16 06:06:38,129 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 27 more)] === [2021-12-16 06:06:38,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-16 06:06:38,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1665526434, now seen corresponding path program 1 times [2021-12-16 06:06:38,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-16 06:06:38,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1323722713] [2021-12-16 06:06:38,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:06:38,130 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-16 06:06:38,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-16 06:06:38,131 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-12-16 06:06:38,131 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-12-16 06:06:38,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:06:38,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 42 conjunts are in the unsatisfiable core [2021-12-16 06:06:38,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:06:38,466 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 06:06:38,670 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 6 treesize of output 5 [2021-12-16 06:06:38,694 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 6 treesize of output 5 [2021-12-16 06:06:38,887 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 9 treesize of output 5 [2021-12-16 06:06:38,893 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 7 treesize of output 3 [2021-12-16 06:06:39,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:06:39,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-16 06:06:39,355 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-12-16 06:06:39,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 16 treesize of output 18 [2021-12-16 06:06:39,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:06:39,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-16 06:06:39,529 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 17 treesize of output 9 [2021-12-16 06:06:39,537 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 06:06:39,830 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 06:06:39,830 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-16 06:06:40,882 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-16 06:06:40,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1323722713] [2021-12-16 06:06:40,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1323722713] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-16 06:06:40,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [899874753] [2021-12-16 06:06:40,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-16 06:06:40,883 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-12-16 06:06:40,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 [2021-12-16 06:06:40,884 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-12-16 06:06:40,886 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-12-16 06:06:41,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-16 06:06:41,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 43 conjunts are in the unsatisfiable core [2021-12-16 06:06:41,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-16 06:06:41,456 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 06:06:41,464 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 06:06:42,127 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 22 treesize of output 14 [2021-12-16 06:06:42,133 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 7 treesize of output 3 [2021-12-16 06:06:42,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:06:42,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 18 [2021-12-16 06:06:42,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:06:42,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 28 [2021-12-16 06:06:42,745 INFO L354 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2021-12-16 06:06:42,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 18 [2021-12-16 06:06:42,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-16 06:06:42,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 16 [2021-12-16 06:06:42,956 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 25 treesize of output 13 [2021-12-16 06:06:42,967 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 06:06:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-16 06:06:43,190 INFO L328 TraceCheckSpWp]: Computing backward predicates...