./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 13:35:14,555 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 13:35:14,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 13:35:14,606 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 13:35:14,607 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 13:35:14,611 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 13:35:14,613 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 13:35:14,616 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 13:35:14,617 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 13:35:14,623 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 13:35:14,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 13:35:14,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 13:35:14,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 13:35:14,626 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 13:35:14,628 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 13:35:14,629 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 13:35:14,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 13:35:14,634 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 13:35:14,635 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 13:35:14,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 13:35:14,640 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 13:35:14,641 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 13:35:14,642 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 13:35:14,643 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 13:35:14,645 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 13:35:14,645 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 13:35:14,645 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 13:35:14,646 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 13:35:14,646 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 13:35:14,647 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 13:35:14,647 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 13:35:14,648 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 13:35:14,648 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 13:35:14,649 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 13:35:14,649 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 13:35:14,650 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 13:35:14,651 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 13:35:14,651 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 13:35:14,651 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 13:35:14,652 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 13:35:14,652 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 13:35:14,653 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-14 13:35:14,684 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 13:35:14,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 13:35:14,685 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 13:35:14,685 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 13:35:14,686 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 13:35:14,686 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 13:35:14,687 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 13:35:14,687 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 13:35:14,687 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 13:35:14,687 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 13:35:14,688 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 13:35:14,688 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-14 13:35:14,688 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 13:35:14,688 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 13:35:14,689 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 13:35:14,689 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 13:35:14,689 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 13:35:14,689 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 13:35:14,689 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 13:35:14,689 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 13:35:14,689 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 13:35:14,690 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 13:35:14,690 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 13:35:14,690 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 13:35:14,690 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:35:14,690 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 13:35:14,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 13:35:14,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 13:35:14,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-14 13:35:14,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-14 13:35:14,692 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 13:35:14,692 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 13:35:14,692 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 13:35:14,693 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 13:35:14,693 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 [2021-12-14 13:35:14,875 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 13:35:14,905 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 13:35:14,907 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 13:35:14,907 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 13:35:14,908 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 13:35:14,909 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2021-12-14 13:35:14,969 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b161d1e8a/411aabc94741436097960b63bd9bdf75/FLAG877753cc3 [2021-12-14 13:35:15,386 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 13:35:15,387 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2021-12-14 13:35:15,401 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b161d1e8a/411aabc94741436097960b63bd9bdf75/FLAG877753cc3 [2021-12-14 13:35:15,756 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b161d1e8a/411aabc94741436097960b63bd9bdf75 [2021-12-14 13:35:15,759 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 13:35:15,760 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 13:35:15,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 13:35:15,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 13:35:15,763 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 13:35:15,764 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:35:15" (1/1) ... [2021-12-14 13:35:15,765 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@9bf0bcc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:15, skipping insertion in model container [2021-12-14 13:35:15,765 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:35:15" (1/1) ... [2021-12-14 13:35:15,770 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 13:35:15,807 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 13:35:16,006 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/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2021-12-14 13:35:16,022 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:35:16,028 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 13:35:16,046 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/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2021-12-14 13:35:16,055 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:35:16,072 INFO L208 MainTranslator]: Completed translation [2021-12-14 13:35:16,073 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:16 WrapperNode [2021-12-14 13:35:16,073 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 13:35:16,074 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 13:35:16,074 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 13:35:16,074 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 13:35:16,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:16" (1/1) ... [2021-12-14 13:35:16,087 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:16" (1/1) ... [2021-12-14 13:35:16,104 INFO L137 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 200 [2021-12-14 13:35:16,104 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 13:35:16,105 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 13:35:16,105 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 13:35:16,105 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 13:35:16,110 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:16" (1/1) ... [2021-12-14 13:35:16,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:16" (1/1) ... [2021-12-14 13:35:16,113 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:16" (1/1) ... [2021-12-14 13:35:16,113 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:16" (1/1) ... [2021-12-14 13:35:16,120 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:16" (1/1) ... [2021-12-14 13:35:16,124 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:16" (1/1) ... [2021-12-14 13:35:16,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:16" (1/1) ... [2021-12-14 13:35:16,128 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 13:35:16,128 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 13:35:16,129 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 13:35:16,129 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 13:35:16,129 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:16" (1/1) ... [2021-12-14 13:35:16,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:35:16,171 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:35:16,192 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) [2021-12-14 13:35:16,224 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 [2021-12-14 13:35:16,258 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2021-12-14 13:35:16,258 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2021-12-14 13:35:16,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 13:35:16,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 13:35:16,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 13:35:16,259 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 13:35:16,259 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 13:35:16,259 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2021-12-14 13:35:16,259 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2021-12-14 13:35:16,259 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 13:35:16,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 13:35:16,260 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2021-12-14 13:35:16,260 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2021-12-14 13:35:16,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-14 13:35:16,260 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2021-12-14 13:35:16,260 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2021-12-14 13:35:16,260 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 13:35:16,260 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 13:35:16,386 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 13:35:16,393 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 13:35:16,627 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 13:35:16,631 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 13:35:16,632 INFO L301 CfgBuilder]: Removed 33 assume(true) statements. [2021-12-14 13:35:16,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:35:16 BoogieIcfgContainer [2021-12-14 13:35:16,633 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 13:35:16,634 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 13:35:16,634 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 13:35:16,636 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 13:35:16,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:35:15" (1/3) ... [2021-12-14 13:35:16,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507a72f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:35:16, skipping insertion in model container [2021-12-14 13:35:16,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:16" (2/3) ... [2021-12-14 13:35:16,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@507a72f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:35:16, skipping insertion in model container [2021-12-14 13:35:16,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:35:16" (3/3) ... [2021-12-14 13:35:16,638 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-2.i [2021-12-14 13:35:16,641 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 13:35:16,641 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 13:35:16,668 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 13:35:16,672 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 13:35:16,672 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 13:35:16,683 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 76 states have (on average 1.6578947368421053) internal successors, (126), 82 states have internal predecessors, (126), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-14 13:35:16,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 13:35:16,686 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:35:16,686 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:35:16,687 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:35:16,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:35:16,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1660370747, now seen corresponding path program 1 times [2021-12-14 13:35:16,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:35:16,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207712778] [2021-12-14 13:35:16,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:35:16,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:35:16,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:35:16,811 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:35:16,811 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:35:16,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207712778] [2021-12-14 13:35:16,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207712778] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:35:16,812 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:35:16,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 13:35:16,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012872647] [2021-12-14 13:35:16,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:35:16,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 13:35:16,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:35:16,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 13:35:16,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 13:35:16,839 INFO L87 Difference]: Start difference. First operand has 96 states, 76 states have (on average 1.6578947368421053) internal successors, (126), 82 states have internal predecessors, (126), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:35:16,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:35:16,862 INFO L93 Difference]: Finished difference Result 188 states and 326 transitions. [2021-12-14 13:35:16,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 13:35:16,863 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-14 13:35:16,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:35:16,868 INFO L225 Difference]: With dead ends: 188 [2021-12-14 13:35:16,868 INFO L226 Difference]: Without dead ends: 88 [2021-12-14 13:35:16,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 13:35:16,872 INFO L933 BasicCegarLoop]: 115 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, 115 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:35:16,873 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:35:16,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-14 13:35:16,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-12-14 13:35:16,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.2388059701492538) internal successors, (83), 75 states have internal predecessors, (83), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-14 13:35:16,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2021-12-14 13:35:16,897 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 16 [2021-12-14 13:35:16,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:35:16,898 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2021-12-14 13:35:16,898 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:35:16,898 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2021-12-14 13:35:16,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-12-14 13:35:16,899 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:35:16,899 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:35:16,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-14 13:35:16,900 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:35:16,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:35:16,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1299807145, now seen corresponding path program 1 times [2021-12-14 13:35:16,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:35:16,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612254281] [2021-12-14 13:35:16,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:35:16,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:35:17,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:35:17,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 13:35:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:35:17,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 13:35:17,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:35:17,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-14 13:35:17,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:35:17,582 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 13 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-12-14 13:35:17,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:35:17,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612254281] [2021-12-14 13:35:17,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612254281] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:35:17,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931841914] [2021-12-14 13:35:17,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:35:17,584 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:35:17,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:35:17,600 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) [2021-12-14 13:35:17,609 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-14 13:35:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:35:17,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 63 conjunts are in the unsatisfiable core [2021-12-14 13:35:17,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:35:17,899 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-14 13:35:17,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2021-12-14 13:35:17,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-14 13:35:17,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-14 13:35:17,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-12-14 13:35:17,964 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 9 treesize of output 7 [2021-12-14 13:35:17,974 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 27 treesize of output 15 [2021-12-14 13:35:18,052 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-14 13:35:18,053 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-12-14 13:35:18,088 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-14 13:35:18,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 8 [2021-12-14 13:35:18,184 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_328 (Array Int Int)) (v_ArrVal_327 (Array Int Int)) (|chain_node_~node~0#1.base| Int)) (and (= (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_327) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_328) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|)) |c_#memory_$Pointer$.base|) (not (= |chain_node_~node~0#1.base| 0)) (<= (+ |chain_node_~node~0#1.base| 1) |c_#StackHeapBarrier|))) is different from true [2021-12-14 13:35:18,215 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:35:18,251 INFO L354 Elim1Store]: treesize reduction 52, result has 46.4 percent of original size [2021-12-14 13:35:18,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 90 [2021-12-14 13:35:18,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-14 13:35:18,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 44 [2021-12-14 13:35:18,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:35:18,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-12-14 13:35:18,333 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 9 treesize of output 7 [2021-12-14 13:35:18,355 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-14 13:35:18,436 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-12-14 13:35:18,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 60 [2021-12-14 13:35:18,458 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 29 treesize of output 21 [2021-12-14 13:35:18,502 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-14 13:35:18,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 35 [2021-12-14 13:35:18,505 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 23 treesize of output 17 [2021-12-14 13:35:18,633 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:35:18,633 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 33 treesize of output 25 [2021-12-14 13:35:18,649 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 2 not checked. [2021-12-14 13:35:18,649 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-14 13:35:18,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931841914] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:35:18,769 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-14 13:35:18,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-12-14 13:35:18,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82206264] [2021-12-14 13:35:18,770 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-14 13:35:18,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-12-14 13:35:18,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:35:18,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-12-14 13:35:18,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=435, Unknown=9, NotChecked=42, Total=552 [2021-12-14 13:35:18,772 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 23 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-14 13:35:19,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:35:19,377 INFO L93 Difference]: Finished difference Result 125 states and 151 transitions. [2021-12-14 13:35:19,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-14 13:35:19,377 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 40 [2021-12-14 13:35:19,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:35:19,380 INFO L225 Difference]: With dead ends: 125 [2021-12-14 13:35:19,380 INFO L226 Difference]: Without dead ends: 122 [2021-12-14 13:35:19,380 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=803, Unknown=12, NotChecked=58, Total=992 [2021-12-14 13:35:19,381 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 70 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 1079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 271 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-12-14 13:35:19,381 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 879 Invalid, 1079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 777 Invalid, 0 Unknown, 271 Unchecked, 0.4s Time] [2021-12-14 13:35:19,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-12-14 13:35:19,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 115. [2021-12-14 13:35:19,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 89 states have (on average 1.2247191011235956) internal successors, (109), 99 states have internal predecessors, (109), 20 states have call successors, (20), 6 states have call predecessors, (20), 5 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-14 13:35:19,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 140 transitions. [2021-12-14 13:35:19,392 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 140 transitions. Word has length 40 [2021-12-14 13:35:19,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:35:19,392 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 140 transitions. [2021-12-14 13:35:19,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 6 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2021-12-14 13:35:19,393 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 140 transitions. [2021-12-14 13:35:19,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-14 13:35:19,394 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:35:19,394 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:35:19,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-14 13:35:19,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:35:19,610 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:35:19,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:35:19,610 INFO L85 PathProgramCache]: Analyzing trace with hash -727961485, now seen corresponding path program 1 times [2021-12-14 13:35:19,611 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-14 13:35:19,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758191506] [2021-12-14 13:35:19,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:35:19,611 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-14 13:35:19,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:35:19,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-14 13:35:19,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:35:19,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2021-12-14 13:35:19,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:35:20,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2021-12-14 13:35:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:35:20,108 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-12-14 13:35:20,110 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-14 13:35:20,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758191506] [2021-12-14 13:35:20,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758191506] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-14 13:35:20,111 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614919566] [2021-12-14 13:35:20,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:35:20,111 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-14 13:35:20,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:35:20,129 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) [2021-12-14 13:35:20,143 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-14 13:35:20,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:35:20,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 120 conjunts are in the unsatisfiable core [2021-12-14 13:35:20,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:35:20,306 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 10 treesize of output 8 [2021-12-14 13:35:20,373 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-14 13:35:20,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2021-12-14 13:35:20,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-14 13:35:20,381 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-14 13:35:20,398 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 11 treesize of output 7 [2021-12-14 13:35:20,424 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-14 13:35:20,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 34 [2021-12-14 13:35:20,426 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 22 treesize of output 16 [2021-12-14 13:35:20,530 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-14 13:35:20,530 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 1 case distinctions, treesize of input 24 treesize of output 19 [2021-12-14 13:35:20,573 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-14 13:35:20,574 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 8 [2021-12-14 13:35:20,732 WARN L860 $PredicateComparison]: unable to prove that (exists ((v_ArrVal_645 (Array Int Int)) (|chain_node_~node~0#1.base| Int) (|chain_node_~node~0#1.offset| Int)) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (= |c_#memory_$Pointer$.base| (let ((.cse0 (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| (store v_ArrVal_645 |chain_node_~node~0#1.offset| (select (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_645) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset|))))) (store .cse0 |c_chain_node_#in~ppnode#1.base| (store (select .cse0 |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|)))) (not (= |chain_node_~node~0#1.base| 0)))) is different from true [2021-12-14 13:35:20,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:35:20,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:35:20,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:35:20,809 INFO L354 Elim1Store]: treesize reduction 13, result has 58.1 percent of original size [2021-12-14 13:35:20,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 4 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 49 [2021-12-14 13:35:20,814 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 10 treesize of output 9 [2021-12-14 13:35:20,843 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 25 treesize of output 20 [2021-12-14 13:35:20,937 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 47 treesize of output 43 [2021-12-14 13:35:23,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:35:23,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:35:23,587 INFO L354 Elim1Store]: treesize reduction 42, result has 42.5 percent of original size [2021-12-14 13:35:23,587 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 91 treesize of output 101 [2021-12-14 13:35:23,600 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Should have been eliminated by DER [2021-12-14 13:35:23,600 INFO L186 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2021-12-14 13:35:23,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2021-12-14 13:35:23,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403046115] [2021-12-14 13:35:23,600 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2021-12-14 13:35:23,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 13:35:23,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-14 13:35:23,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 13:35:23,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=487, Unknown=2, NotChecked=44, Total=600 [2021-12-14 13:35:23,604 INFO L87 Difference]: Start difference. First operand 115 states and 140 transitions. Second operand has 17 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 15 states have internal predecessors, (29), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-12-14 13:35:23,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 13:35:23,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=67, Invalid=487, Unknown=2, NotChecked=44, Total=600 [2021-12-14 13:35:23,609 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 [2021-12-14 13:35:23,610 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] [2021-12-14 13:35:23,632 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-14 13:35:23,830 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,SelfDestructingSolverStorable2 [2021-12-14 13:35:23,830 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.smtlibutils.IncrementalPlicationChecker@64d9e036 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) [2021-12-14 13:35:23,834 INFO L158 Benchmark]: Toolchain (without parser) took 8073.93ms. Allocated memory was 100.7MB in the beginning and 218.1MB in the end (delta: 117.4MB). Free memory was 73.1MB in the beginning and 84.2MB in the end (delta: -11.1MB). Peak memory consumption was 105.4MB. Max. memory is 16.1GB. [2021-12-14 13:35:23,834 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 100.7MB. Free memory is still 57.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-14 13:35:23,834 INFO L158 Benchmark]: CACSL2BoogieTranslator took 312.23ms. Allocated memory was 100.7MB in the beginning and 159.4MB in the end (delta: 58.7MB). Free memory was 72.9MB in the beginning and 127.2MB in the end (delta: -54.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2021-12-14 13:35:23,834 INFO L158 Benchmark]: Boogie Procedure Inliner took 30.60ms. Allocated memory is still 159.4MB. Free memory was 127.2MB in the beginning and 125.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-14 13:35:23,834 INFO L158 Benchmark]: Boogie Preprocessor took 23.17ms. Allocated memory is still 159.4MB. Free memory was 125.1MB in the beginning and 122.6MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-14 13:35:23,835 INFO L158 Benchmark]: RCFGBuilder took 504.50ms. Allocated memory is still 159.4MB. Free memory was 122.6MB in the beginning and 102.9MB in the end (delta: 19.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2021-12-14 13:35:23,835 INFO L158 Benchmark]: TraceAbstraction took 7199.28ms. Allocated memory was 159.4MB in the beginning and 218.1MB in the end (delta: 58.7MB). Free memory was 102.5MB in the beginning and 84.2MB in the end (delta: 18.3MB). Peak memory consumption was 79.3MB. Max. memory is 16.1GB. [2021-12-14 13:35:23,836 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 100.7MB. Free memory is still 57.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 312.23ms. Allocated memory was 100.7MB in the beginning and 159.4MB in the end (delta: 58.7MB). Free memory was 72.9MB in the beginning and 127.2MB in the end (delta: -54.3MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 30.60ms. Allocated memory is still 159.4MB. Free memory was 127.2MB in the beginning and 125.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.17ms. Allocated memory is still 159.4MB. Free memory was 125.1MB in the beginning and 122.6MB in the end (delta: 2.5MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 504.50ms. Allocated memory is still 159.4MB. Free memory was 122.6MB in the beginning and 102.9MB in the end (delta: 19.7MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 7199.28ms. Allocated memory was 159.4MB in the beginning and 218.1MB in the end (delta: 58.7MB). Free memory was 102.5MB in the beginning and 84.2MB in the end (delta: 18.3MB). Peak memory consumption was 79.3MB. 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.smtlibutils.IncrementalPlicationChecker@64d9e036 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@64d9e036: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:82) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-12-14 13:35:23,864 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-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 ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 --- Real Ultimate output --- This is Ultimate 0.2.2-839c364b5d67a0f615c82cb70ab247790648d4a9-839c364 [2021-12-14 13:35:25,543 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-14 13:35:25,544 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-14 13:35:25,578 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-14 13:35:25,579 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-14 13:35:25,581 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-14 13:35:25,583 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-14 13:35:25,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-14 13:35:25,588 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-14 13:35:25,591 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-14 13:35:25,592 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-14 13:35:25,593 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-14 13:35:25,593 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-14 13:35:25,595 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-14 13:35:25,597 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-14 13:35:25,599 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-14 13:35:25,600 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-14 13:35:25,601 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-14 13:35:25,601 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-14 13:35:25,604 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-14 13:35:25,607 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-14 13:35:25,608 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-14 13:35:25,608 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-14 13:35:25,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-14 13:35:25,611 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-14 13:35:25,613 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-14 13:35:25,614 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-14 13:35:25,614 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-14 13:35:25,615 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-14 13:35:25,616 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-14 13:35:25,616 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-14 13:35:25,616 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-14 13:35:25,617 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-14 13:35:25,618 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-14 13:35:25,619 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-14 13:35:25,619 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-14 13:35:25,619 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-14 13:35:25,619 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-14 13:35:25,620 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-14 13:35:25,621 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-14 13:35:25,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-14 13:35:25,624 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Bitvector.epf [2021-12-14 13:35:25,645 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-14 13:35:25,645 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-14 13:35:25,645 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-14 13:35:25,646 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-14 13:35:25,646 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-14 13:35:25,646 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-14 13:35:25,647 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-14 13:35:25,647 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-14 13:35:25,648 INFO L138 SettingsManager]: * Use SBE=true [2021-12-14 13:35:25,648 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-14 13:35:25,648 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-14 13:35:25,648 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-14 13:35:25,649 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-14 13:35:25,649 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-14 13:35:25,649 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-14 13:35:25,649 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-14 13:35:25,649 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-12-14 13:35:25,649 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-12-14 13:35:25,650 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-12-14 13:35:25,650 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-14 13:35:25,650 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-14 13:35:25,650 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-14 13:35:25,650 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-14 13:35:25,650 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-14 13:35:25,651 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-14 13:35:25,651 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-14 13:35:25,651 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:35:25,651 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-14 13:35:25,651 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-14 13:35:25,651 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-14 13:35:25,651 INFO L138 SettingsManager]: * Trace refinement strategy=WOLF [2021-12-14 13:35:25,652 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-12-14 13:35:25,652 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-14 13:35:25,652 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-14 13:35:25,652 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-14 13:35:25,652 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-14 13:35:25,653 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-12-14 13:35:25,653 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8f9453cad2383b5119b308e041fed5f4a740e7abd43cb8ad7833872af20a8d57 [2021-12-14 13:35:25,928 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-14 13:35:25,947 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-14 13:35:25,949 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-14 13:35:25,950 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-14 13:35:25,950 INFO L275 PluginConnector]: CDTParser initialized [2021-12-14 13:35:25,952 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2021-12-14 13:35:26,019 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22387ab37/c04e2ecf2fd545e19c0aa5bb3b180833/FLAG20bdc0daf [2021-12-14 13:35:26,472 INFO L306 CDTParser]: Found 1 translation units. [2021-12-14 13:35:26,472 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-2.i [2021-12-14 13:35:26,480 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22387ab37/c04e2ecf2fd545e19c0aa5bb3b180833/FLAG20bdc0daf [2021-12-14 13:35:26,862 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/22387ab37/c04e2ecf2fd545e19c0aa5bb3b180833 [2021-12-14 13:35:26,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-14 13:35:26,865 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-14 13:35:26,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-14 13:35:26,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-14 13:35:26,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-14 13:35:26,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:35:26" (1/1) ... [2021-12-14 13:35:26,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d06daa5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:26, skipping insertion in model container [2021-12-14 13:35:26,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 01:35:26" (1/1) ... [2021-12-14 13:35:26,874 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-14 13:35:26,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-14 13:35:27,075 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/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2021-12-14 13:35:27,091 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:35:27,101 INFO L203 MainTranslator]: Completed pre-run [2021-12-14 13:35:27,134 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/heap-manipulation/sll_to_dll_rev-2.i[22636,22649] [2021-12-14 13:35:27,153 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-14 13:35:27,175 INFO L208 MainTranslator]: Completed translation [2021-12-14 13:35:27,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:27 WrapperNode [2021-12-14 13:35:27,175 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-14 13:35:27,176 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-14 13:35:27,176 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-14 13:35:27,177 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-14 13:35:27,181 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:27" (1/1) ... [2021-12-14 13:35:27,202 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:27" (1/1) ... [2021-12-14 13:35:27,223 INFO L137 Inliner]: procedures = 130, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 198 [2021-12-14 13:35:27,224 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-14 13:35:27,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-14 13:35:27,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-14 13:35:27,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-14 13:35:27,229 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:27" (1/1) ... [2021-12-14 13:35:27,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:27" (1/1) ... [2021-12-14 13:35:27,232 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:27" (1/1) ... [2021-12-14 13:35:27,232 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:27" (1/1) ... [2021-12-14 13:35:27,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:27" (1/1) ... [2021-12-14 13:35:27,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:27" (1/1) ... [2021-12-14 13:35:27,244 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:27" (1/1) ... [2021-12-14 13:35:27,247 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-14 13:35:27,248 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-14 13:35:27,248 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-14 13:35:27,248 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-14 13:35:27,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:27" (1/1) ... [2021-12-14 13:35:27,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-14 13:35:27,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-14 13:35:27,280 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) [2021-12-14 13:35:27,314 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 [2021-12-14 13:35:27,318 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2021-12-14 13:35:27,318 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2021-12-14 13:35:27,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-14 13:35:27,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-14 13:35:27,318 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-14 13:35:27,318 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-14 13:35:27,318 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-14 13:35:27,318 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2021-12-14 13:35:27,319 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2021-12-14 13:35:27,319 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-14 13:35:27,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-14 13:35:27,319 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-12-14 13:35:27,319 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2021-12-14 13:35:27,319 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2021-12-14 13:35:27,319 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2021-12-14 13:35:27,319 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2021-12-14 13:35:27,320 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-14 13:35:27,320 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-14 13:35:27,405 INFO L236 CfgBuilder]: Building ICFG [2021-12-14 13:35:27,406 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-14 13:35:27,670 INFO L277 CfgBuilder]: Performing block encoding [2021-12-14 13:35:27,675 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-14 13:35:27,675 INFO L301 CfgBuilder]: Removed 33 assume(true) statements. [2021-12-14 13:35:27,677 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:35:27 BoogieIcfgContainer [2021-12-14 13:35:27,677 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-14 13:35:27,678 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-14 13:35:27,678 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-14 13:35:27,680 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-14 13:35:27,680 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 01:35:26" (1/3) ... [2021-12-14 13:35:27,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52326326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:35:27, skipping insertion in model container [2021-12-14 13:35:27,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 01:35:27" (2/3) ... [2021-12-14 13:35:27,681 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@52326326 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 01:35:27, skipping insertion in model container [2021-12-14 13:35:27,681 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 01:35:27" (3/3) ... [2021-12-14 13:35:27,682 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-2.i [2021-12-14 13:35:27,685 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-14 13:35:27,685 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-14 13:35:27,715 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-14 13:35:27,720 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-12-14 13:35:27,720 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-14 13:35:27,731 INFO L276 IsEmpty]: Start isEmpty. Operand has 93 states, 73 states have (on average 1.6849315068493151) internal successors, (123), 79 states have internal predecessors, (123), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-12-14 13:35:27,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-14 13:35:27,735 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:35:27,735 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:35:27,736 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:35:27,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:35:27,739 INFO L85 PathProgramCache]: Analyzing trace with hash -467593890, now seen corresponding path program 1 times [2021-12-14 13:35:27,747 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 13:35:27,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1565239624] [2021-12-14 13:35:27,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:35:27,748 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 13:35:27,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 13:35:27,750 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) [2021-12-14 13:35:27,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-12-14 13:35:27,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:35:27,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-14 13:35:27,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:35:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-14 13:35:27,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 13:35:27,878 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 13:35:27,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1565239624] [2021-12-14 13:35:27,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1565239624] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:35:27,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:35:27,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-14 13:35:27,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114494826] [2021-12-14 13:35:27,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:35:27,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-14 13:35:27,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 13:35:27,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-14 13:35:27,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 13:35:27,902 INFO L87 Difference]: Start difference. First operand has 93 states, 73 states have (on average 1.6849315068493151) internal successors, (123), 79 states have internal predecessors, (123), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:35:27,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:35:27,922 INFO L93 Difference]: Finished difference Result 182 states and 320 transitions. [2021-12-14 13:35:27,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-14 13:35:27,924 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-12-14 13:35:27,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:35:27,929 INFO L225 Difference]: With dead ends: 182 [2021-12-14 13:35:27,929 INFO L226 Difference]: Without dead ends: 85 [2021-12-14 13:35:27,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-14 13:35:27,934 INFO L933 BasicCegarLoop]: 112 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, 112 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-14 13:35:27,935 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-14 13:35:27,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-12-14 13:35:27,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-12-14 13:35:27,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 64 states have (on average 1.25) internal successors, (80), 72 states have internal predecessors, (80), 17 states have call successors, (17), 4 states have call predecessors, (17), 3 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2021-12-14 13:35:27,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 105 transitions. [2021-12-14 13:35:27,969 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 105 transitions. Word has length 16 [2021-12-14 13:35:27,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:35:27,970 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 105 transitions. [2021-12-14 13:35:27,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-14 13:35:27,970 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 105 transitions. [2021-12-14 13:35:27,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-12-14 13:35:27,971 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:35:27,971 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:35:27,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-12-14 13:35:28,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 13:35:28,180 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:35:28,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:35:28,181 INFO L85 PathProgramCache]: Analyzing trace with hash -485270813, now seen corresponding path program 1 times [2021-12-14 13:35:28,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 13:35:28,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2020497974] [2021-12-14 13:35:28,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:35:28,183 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 13:35:28,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 13:35:28,187 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) [2021-12-14 13:35:28,188 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-12-14 13:35:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:35:28,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 38 conjunts are in the unsatisfiable core [2021-12-14 13:35:28,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:35:28,747 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-14 13:35:28,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2021-12-14 13:35:28,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-14 13:35:28,773 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-14 13:35:28,833 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:35:28,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 19 [2021-12-14 13:35:28,839 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 9 treesize of output 7 [2021-12-14 13:35:28,858 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 27 treesize of output 15 [2021-12-14 13:35:28,981 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-14 13:35:28,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 24 treesize of output 19 [2021-12-14 13:35:29,023 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-14 13:35:29,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 8 [2021-12-14 13:35:29,292 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:35:29,375 INFO L354 Elim1Store]: treesize reduction 52, result has 46.4 percent of original size [2021-12-14 13:35:29,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 56 treesize of output 90 [2021-12-14 13:35:29,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-14 13:35:29,478 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-12-14 13:35:29,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 51 [2021-12-14 13:35:29,487 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 28 treesize of output 20 [2021-12-14 13:35:29,623 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-14 13:35:29,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 51 treesize of output 40 [2021-12-14 13:35:29,629 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 28 treesize of output 20 [2021-12-14 13:35:29,949 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:35:29,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2021-12-14 13:35:30,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 3 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 107 treesize of output 107 [2021-12-14 13:35:30,737 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 9 treesize of output 7 [2021-12-14 13:35:31,329 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:35:31,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 80 treesize of output 64 [2021-12-14 13:35:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-14 13:35:31,722 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-14 13:35:31,722 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-12-14 13:35:31,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2020497974] [2021-12-14 13:35:31,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2020497974] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-14 13:35:31,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-14 13:35:31,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-12-14 13:35:31,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259569643] [2021-12-14 13:35:31,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-14 13:35:31,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-12-14 13:35:31,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-12-14 13:35:31,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-12-14 13:35:31,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=224, Unknown=2, NotChecked=0, Total=272 [2021-12-14 13:35:31,727 INFO L87 Difference]: Start difference. First operand 85 states and 105 transitions. Second operand has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 13:35:32,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-14 13:35:32,087 INFO L93 Difference]: Finished difference Result 114 states and 139 transitions. [2021-12-14 13:35:32,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-12-14 13:35:32,087 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2021-12-14 13:35:32,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-14 13:35:32,089 INFO L225 Difference]: With dead ends: 114 [2021-12-14 13:35:32,089 INFO L226 Difference]: Without dead ends: 111 [2021-12-14 13:35:32,090 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=71, Invalid=346, Unknown=3, NotChecked=0, Total=420 [2021-12-14 13:35:32,090 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 19 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 68 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-14 13:35:32,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 640 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 93 Invalid, 0 Unknown, 68 Unchecked, 0.2s Time] [2021-12-14 13:35:32,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-12-14 13:35:32,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 100. [2021-12-14 13:35:32,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 76 states have (on average 1.2236842105263157) internal successors, (93), 84 states have internal predecessors, (93), 19 states have call successors, (19), 6 states have call predecessors, (19), 4 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-14 13:35:32,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 122 transitions. [2021-12-14 13:35:32,101 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 122 transitions. Word has length 37 [2021-12-14 13:35:32,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-14 13:35:32,101 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 122 transitions. [2021-12-14 13:35:32,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 15 states have internal predecessors, (29), 4 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2021-12-14 13:35:32,101 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 122 transitions. [2021-12-14 13:35:32,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-14 13:35:32,102 INFO L506 BasicCegarLoop]: Found error trace [2021-12-14 13:35:32,102 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-14 13:35:32,127 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-12-14 13:35:32,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 [2021-12-14 13:35:32,313 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-14 13:35:32,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-14 13:35:32,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1799128557, now seen corresponding path program 1 times [2021-12-14 13:35:32,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-12-14 13:35:32,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1581226735] [2021-12-14 13:35:32,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-14 13:35:32,314 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-12-14 13:35:32,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat [2021-12-14 13:35:32,315 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) [2021-12-14 13:35:32,317 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-12-14 13:35:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-14 13:35:32,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 57 conjunts are in the unsatisfiable core [2021-12-14 13:35:32,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-14 13:35:32,565 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 26 treesize of output 24 [2021-12-14 13:35:32,661 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-14 13:35:32,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 36 treesize of output 51 [2021-12-14 13:35:32,668 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-14 13:35:32,679 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 11 [2021-12-14 13:35:32,700 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 11 treesize of output 7 [2021-12-14 13:35:32,734 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-14 13:35:32,735 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 34 [2021-12-14 13:35:32,738 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 22 treesize of output 16 [2021-12-14 13:35:32,842 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-14 13:35:32,843 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 1 case distinctions, treesize of input 24 treesize of output 19 [2021-12-14 13:35:32,880 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-14 13:35:32,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 20 treesize of output 8 [2021-12-14 13:35:33,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:35:33,158 INFO L354 Elim1Store]: treesize reduction 40, result has 57.9 percent of original size [2021-12-14 13:35:33,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 60 treesize of output 94 [2021-12-14 13:35:33,195 INFO L354 Elim1Store]: treesize reduction 26, result has 36.6 percent of original size [2021-12-14 13:35:33,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 45 [2021-12-14 13:35:33,317 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:35:33,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:35:33,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 24 [2021-12-14 13:35:33,457 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-14 13:35:33,458 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 19 treesize of output 13 [2021-12-14 13:35:33,507 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 7 treesize of output 5 [2021-12-14 13:35:33,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-14 13:35:33,534 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 33 treesize of output 35 [2021-12-14 13:35:33,653 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 19 treesize of output 21 [2021-12-14 13:35:33,708 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 [2021-12-14 13:35:34,031 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-14 13:35:34,098 INFO L354 Elim1Store]: treesize reduction 52, result has 46.4 percent of original size [2021-12-14 13:35:34,098 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 49 treesize of output 87 [2021-12-14 13:35:34,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2021-12-14 13:35:34,185 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-12-14 13:35:34,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 60 treesize of output 55 [2021-12-14 13:35:34,199 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 28 treesize of output 20