./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version c3fed411 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-17 07:54:33,587 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-17 07:54:33,589 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-17 07:54:33,631 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-17 07:54:33,631 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-17 07:54:33,636 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-17 07:54:33,638 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-17 07:54:33,644 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-17 07:54:33,646 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-17 07:54:33,652 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-17 07:54:33,653 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-17 07:54:33,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-17 07:54:33,655 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-17 07:54:33,655 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-17 07:54:33,656 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-17 07:54:33,658 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-17 07:54:33,659 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-17 07:54:33,660 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-17 07:54:33,665 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-17 07:54:33,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-17 07:54:33,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-17 07:54:33,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-17 07:54:33,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-17 07:54:33,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-17 07:54:33,680 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-17 07:54:33,680 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-17 07:54:33,680 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-17 07:54:33,682 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-17 07:54:33,683 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-17 07:54:33,683 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-17 07:54:33,684 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-17 07:54:33,685 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-17 07:54:33,686 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-17 07:54:33,687 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-17 07:54:33,688 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-17 07:54:33,689 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-17 07:54:33,689 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-17 07:54:33,689 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-17 07:54:33,690 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-17 07:54:33,690 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-17 07:54:33,691 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-17 07:54:33,692 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-17 07:54:33,725 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-17 07:54:33,725 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-17 07:54:33,726 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-17 07:54:33,726 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-17 07:54:33,727 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-17 07:54:33,727 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-17 07:54:33,728 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-17 07:54:33,728 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-17 07:54:33,728 INFO L138 SettingsManager]: * Use SBE=true [2021-12-17 07:54:33,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-17 07:54:33,729 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-17 07:54:33,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-17 07:54:33,730 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-17 07:54:33,730 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-17 07:54:33,730 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-17 07:54:33,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-17 07:54:33,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-17 07:54:33,730 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-17 07:54:33,731 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-17 07:54:33,731 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-17 07:54:33,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-17 07:54:33,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-17 07:54:33,731 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-17 07:54:33,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-17 07:54:33,732 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 07:54:33,732 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-17 07:54:33,732 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-17 07:54:33,733 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-17 07:54:33,734 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-17 07:54:33,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-17 07:54:33,734 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-17 07:54:33,734 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-17 07:54:33,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-17 07:54:33,735 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-17 07:54:33,735 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f8d14145608efc0a8f321a178564faff63399ecbab28641c0c2971fec318068f [2021-12-17 07:54:34,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-17 07:54:34,038 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-17 07:54:34,040 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-17 07:54:34,041 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-17 07:54:34,043 INFO L275 PluginConnector]: CDTParser initialized [2021-12-17 07:54:34,044 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2021-12-17 07:54:34,104 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82e4d11cb/acf0197ede4549acb2d18d96b713f95f/FLAG2f26d3d2c [2021-12-17 07:54:34,623 INFO L306 CDTParser]: Found 1 translation units. [2021-12-17 07:54:34,627 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/heap-manipulation/sll_to_dll_rev-1.i [2021-12-17 07:54:34,640 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82e4d11cb/acf0197ede4549acb2d18d96b713f95f/FLAG2f26d3d2c [2021-12-17 07:54:34,937 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82e4d11cb/acf0197ede4549acb2d18d96b713f95f [2021-12-17 07:54:34,940 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-17 07:54:34,941 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-17 07:54:34,948 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-17 07:54:34,948 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-17 07:54:34,951 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-17 07:54:34,951 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 07:54:34" (1/1) ... [2021-12-17 07:54:34,952 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@54d8a8ca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:54:34, skipping insertion in model container [2021-12-17 07:54:34,952 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.12 07:54:34" (1/1) ... [2021-12-17 07:54:34,970 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-17 07:54:35,021 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-17 07:54:35,197 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-1.i[22636,22649] [2021-12-17 07:54:35,246 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 07:54:35,259 INFO L203 MainTranslator]: Completed pre-run [2021-12-17 07:54:35,302 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-1.i[22636,22649] [2021-12-17 07:54:35,324 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-17 07:54:35,358 INFO L208 MainTranslator]: Completed translation [2021-12-17 07:54:35,358 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:54:35 WrapperNode [2021-12-17 07:54:35,358 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-17 07:54:35,360 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-17 07:54:35,361 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-17 07:54:35,361 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-17 07:54:35,367 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:54:35" (1/1) ... [2021-12-17 07:54:35,397 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:54:35" (1/1) ... [2021-12-17 07:54:35,430 INFO L137 Inliner]: procedures = 129, calls = 79, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 200 [2021-12-17 07:54:35,430 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-17 07:54:35,431 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-17 07:54:35,431 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-17 07:54:35,431 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-17 07:54:35,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:54:35" (1/1) ... [2021-12-17 07:54:35,439 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:54:35" (1/1) ... [2021-12-17 07:54:35,444 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:54:35" (1/1) ... [2021-12-17 07:54:35,445 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:54:35" (1/1) ... [2021-12-17 07:54:35,453 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:54:35" (1/1) ... [2021-12-17 07:54:35,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:54:35" (1/1) ... [2021-12-17 07:54:35,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:54:35" (1/1) ... [2021-12-17 07:54:35,466 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-17 07:54:35,467 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-17 07:54:35,467 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-17 07:54:35,467 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-17 07:54:35,468 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:54:35" (1/1) ... [2021-12-17 07:54:35,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-17 07:54:35,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 07:54:35,515 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) [2021-12-17 07:54:35,546 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 [2021-12-17 07:54:35,571 INFO L130 BoogieDeclarations]: Found specification of procedure fail [2021-12-17 07:54:35,572 INFO L138 BoogieDeclarations]: Found implementation of procedure fail [2021-12-17 07:54:35,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-17 07:54:35,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-17 07:54:35,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-17 07:54:35,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-17 07:54:35,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-17 07:54:35,573 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_prev [2021-12-17 07:54:35,573 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_prev [2021-12-17 07:54:35,573 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-17 07:54:35,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-12-17 07:54:35,573 INFO L130 BoogieDeclarations]: Found specification of procedure chain_node [2021-12-17 07:54:35,573 INFO L138 BoogieDeclarations]: Found implementation of procedure chain_node [2021-12-17 07:54:35,573 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-17 07:54:35,574 INFO L130 BoogieDeclarations]: Found specification of procedure check_seq_next [2021-12-17 07:54:35,574 INFO L138 BoogieDeclarations]: Found implementation of procedure check_seq_next [2021-12-17 07:54:35,574 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-17 07:54:35,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-17 07:54:35,666 INFO L236 CfgBuilder]: Building ICFG [2021-12-17 07:54:35,668 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-17 07:54:35,998 INFO L277 CfgBuilder]: Performing block encoding [2021-12-17 07:54:36,008 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-17 07:54:36,011 INFO L301 CfgBuilder]: Removed 33 assume(true) statements. [2021-12-17 07:54:36,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:54:36 BoogieIcfgContainer [2021-12-17 07:54:36,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-17 07:54:36,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-17 07:54:36,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-17 07:54:36,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-17 07:54:36,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.12 07:54:34" (1/3) ... [2021-12-17 07:54:36,022 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@400d7a5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 07:54:36, skipping insertion in model container [2021-12-17 07:54:36,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.12 07:54:35" (2/3) ... [2021-12-17 07:54:36,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@400d7a5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.12 07:54:36, skipping insertion in model container [2021-12-17 07:54:36,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:54:36" (3/3) ... [2021-12-17 07:54:36,024 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_to_dll_rev-1.i [2021-12-17 07:54:36,028 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-17 07:54:36,029 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-12-17 07:54:36,084 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-17 07:54:36,095 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 [2021-12-17 07:54:36,095 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-12-17 07:54:36,123 INFO L276 IsEmpty]: Start isEmpty. Operand has 96 states, 75 states have (on average 1.68) internal successors, (126), 83 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) [2021-12-17 07:54:36,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-12-17 07:54:36,129 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:54:36,130 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 07:54:36,131 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:54:36,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:54:36,136 INFO L85 PathProgramCache]: Analyzing trace with hash 1660370747, now seen corresponding path program 1 times [2021-12-17 07:54:36,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 07:54:36,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671517742] [2021-12-17 07:54:36,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:54:36,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 07:54:36,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:36,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-17 07:54:36,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 07:54:36,333 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [671517742] [2021-12-17 07:54:36,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [671517742] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-17 07:54:36,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-17 07:54:36,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-17 07:54:36,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078467756] [2021-12-17 07:54:36,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-17 07:54:36,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-17 07:54:36,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 07:54:36,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-17 07:54:36,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-17 07:54:36,375 INFO L87 Difference]: Start difference. First operand has 96 states, 75 states have (on average 1.68) internal successors, (126), 83 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) [2021-12-17 07:54:36,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:54:36,430 INFO L93 Difference]: Finished difference Result 188 states and 326 transitions. [2021-12-17 07:54:36,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-17 07:54:36,432 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 [2021-12-17 07:54:36,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:54:36,441 INFO L225 Difference]: With dead ends: 188 [2021-12-17 07:54:36,441 INFO L226 Difference]: Without dead ends: 88 [2021-12-17 07:54:36,448 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 [2021-12-17 07:54:36,452 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 [2021-12-17 07:54:36,453 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] [2021-12-17 07:54:36,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-12-17 07:54:36,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-12-17 07:54:36,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 67 states have (on average 1.2388059701492538) internal successors, (83), 76 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) [2021-12-17 07:54:36,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2021-12-17 07:54:36,508 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 16 [2021-12-17 07:54:36,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:54:36,508 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2021-12-17 07:54:36,509 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) [2021-12-17 07:54:36,509 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2021-12-17 07:54:36,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-12-17 07:54:36,511 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:54:36,511 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 07:54:36,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-17 07:54:36,512 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:54:36,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:54:36,513 INFO L85 PathProgramCache]: Analyzing trace with hash -871113262, now seen corresponding path program 1 times [2021-12-17 07:54:36,514 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 07:54:36,514 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697105290] [2021-12-17 07:54:36,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:54:36,514 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 07:54:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:37,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 07:54:37,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:37,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 07:54:37,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 07:54:37,492 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 07:54:37,492 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697105290] [2021-12-17 07:54:37,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697105290] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 07:54:37,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638454604] [2021-12-17 07:54:37,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:54:37,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 07:54:37,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 07:54:37,500 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) [2021-12-17 07:54:37,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-17 07:54:37,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:37,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 339 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-17 07:54:37,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 07:54:37,891 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-17 07:54:37,892 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 [2021-12-17 07:54:37,898 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 [2021-12-17 07:54:37,904 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 [2021-12-17 07:54:37,949 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 [2021-12-17 07:54:37,969 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-17 07:54:37,970 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 [2021-12-17 07:54:37,973 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 [2021-12-17 07:54:38,154 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-17 07:54:38,157 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 [2021-12-17 07:54:38,321 INFO L354 Elim1Store]: treesize reduction 40, result has 27.3 percent of original size [2021-12-17 07:54:38,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 29 [2021-12-17 07:54:38,399 INFO L354 Elim1Store]: treesize reduction 24, result has 4.0 percent of original size [2021-12-17 07:54:38,400 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 31 treesize of output 11 [2021-12-17 07:54:38,555 WARN L860 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int) (v_ArrVal_245 (Array Int Int)) (v_ArrVal_244 (Array Int Int))) (and (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (not (= 0 |chain_node_~node~0#1.base|)) (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_244) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_245) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|))))) is different from true [2021-12-17 07:54:38,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 07:54:38,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 07:54:38,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 07:54:38,650 INFO L354 Elim1Store]: treesize reduction 47, result has 44.7 percent of original size [2021-12-17 07:54:38,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 45 treesize of output 71 [2021-12-17 07:54:38,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 13 [2021-12-17 07:54:38,708 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 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 29 [2021-12-17 07:54:38,733 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 36 treesize of output 32 [2021-12-17 07:54:38,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 07:54:38,920 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 42 treesize of output 30 [2021-12-17 07:54:38,940 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-17 07:54:38,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 07:54:39,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638454604] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 07:54:39,116 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 07:54:39,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2021-12-17 07:54:39,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830209028] [2021-12-17 07:54:39,117 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 07:54:39,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-17 07:54:39,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 07:54:39,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-17 07:54:39,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=568, Unknown=10, NotChecked=48, Total=702 [2021-12-17 07:54:39,119 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 26 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 23 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 07:54:40,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:54:40,013 INFO L93 Difference]: Finished difference Result 129 states and 157 transitions. [2021-12-17 07:54:40,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 07:54:40,014 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 23 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 33 [2021-12-17 07:54:40,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:54:40,016 INFO L225 Difference]: With dead ends: 129 [2021-12-17 07:54:40,016 INFO L226 Difference]: Without dead ends: 126 [2021-12-17 07:54:40,017 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=147, Invalid=1103, Unknown=14, NotChecked=68, Total=1332 [2021-12-17 07:54:40,018 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 135 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 1078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 300 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 07:54:40,018 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 785 Invalid, 1078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 721 Invalid, 0 Unknown, 300 Unchecked, 0.5s Time] [2021-12-17 07:54:40,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-12-17 07:54:40,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 117. [2021-12-17 07:54:40,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 92 states have (on average 1.2282608695652173) internal successors, (113), 101 states have internal predecessors, (113), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 07:54:40,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 142 transitions. [2021-12-17 07:54:40,032 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 142 transitions. Word has length 33 [2021-12-17 07:54:40,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:54:40,033 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 142 transitions. [2021-12-17 07:54:40,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 23 states have internal predecessors, (46), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 07:54:40,033 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 142 transitions. [2021-12-17 07:54:40,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-12-17 07:54:40,034 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:54:40,035 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 07:54:40,062 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-17 07:54:40,254 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 [2021-12-17 07:54:40,255 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:54:40,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:54:40,255 INFO L85 PathProgramCache]: Analyzing trace with hash 371633244, now seen corresponding path program 1 times [2021-12-17 07:54:40,255 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 07:54:40,255 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797637193] [2021-12-17 07:54:40,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:54:40,256 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 07:54:40,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:40,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2021-12-17 07:54:40,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:40,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2021-12-17 07:54:40,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:40,729 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-17 07:54:40,729 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-17 07:54:40,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797637193] [2021-12-17 07:54:40,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797637193] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 07:54:40,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066268397] [2021-12-17 07:54:40,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:54:40,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-17 07:54:40,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-17 07:54:40,736 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) [2021-12-17 07:54:40,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-17 07:54:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-17 07:54:40,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 74 conjunts are in the unsatisfiable core [2021-12-17 07:54:40,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-17 07:54:40,887 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 [2021-12-17 07:54:40,980 INFO L354 Elim1Store]: treesize reduction 26, result has 42.2 percent of original size [2021-12-17 07:54:40,981 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 [2021-12-17 07:54:40,986 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 [2021-12-17 07:54:40,993 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 [2021-12-17 07:54:41,015 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 [2021-12-17 07:54:41,027 INFO L354 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2021-12-17 07:54:41,027 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 [2021-12-17 07:54:41,029 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 [2021-12-17 07:54:41,136 INFO L354 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2021-12-17 07:54:41,137 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 [2021-12-17 07:54:41,233 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-12-17 07:54:41,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 2 case distinctions, treesize of input 26 treesize of output 33 [2021-12-17 07:54:41,254 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 [2021-12-17 07:54:41,301 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 8 treesize of output 4 [2021-12-17 07:54:41,442 WARN L860 $PredicateComparison]: unable to prove that (exists ((|chain_node_~node~0#1.base| Int) (v_ArrVal_483 (Array Int Int)) (v_ArrVal_482 (Array Int Int))) (and (= |c_#memory_$Pointer$.base| (store (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_482) |c_chain_node_#in~ppnode#1.base| (store (select (store |c_old(#memory_$Pointer$.base)| |chain_node_~node~0#1.base| v_ArrVal_483) |c_chain_node_#in~ppnode#1.base|) |c_chain_node_#in~ppnode#1.offset| |chain_node_~node~0#1.base|))) (< |chain_node_~node~0#1.base| |c_#StackHeapBarrier|) (not (= 0 |chain_node_~node~0#1.base|)))) is different from true [2021-12-17 07:54:41,477 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 07:54:41,518 INFO L354 Elim1Store]: treesize reduction 52, result has 46.4 percent of original size [2021-12-17 07:54:41,518 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 45 treesize of output 83 [2021-12-17 07:54:41,525 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 [2021-12-17 07:54:41,536 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 [2021-12-17 07:54:41,568 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 36 [2021-12-17 07:54:41,635 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-12-17 07:54:41,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-12-17 07:54:41,644 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 [2021-12-17 07:54:41,648 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 [2021-12-17 07:54:41,686 INFO L354 Elim1Store]: treesize reduction 17, result has 32.0 percent of original size [2021-12-17 07:54:41,686 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 84 treesize of output 75 [2021-12-17 07:54:41,722 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 [2021-12-17 07:54:41,888 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-12-17 07:54:41,889 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 [2021-12-17 07:54:41,939 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 2 not checked. [2021-12-17 07:54:41,939 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-17 07:54:42,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066268397] provided 0 perfect and 1 imperfect interpolant sequences [2021-12-17 07:54:42,100 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-17 07:54:42,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 26 [2021-12-17 07:54:42,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829095801] [2021-12-17 07:54:42,100 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-17 07:54:42,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-12-17 07:54:42,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-17 07:54:42,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-12-17 07:54:42,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=567, Unknown=10, NotChecked=48, Total=702 [2021-12-17 07:54:42,102 INFO L87 Difference]: Start difference. First operand 117 states and 142 transitions. Second operand has 26 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 23 states have internal predecessors, (48), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 07:54:42,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-17 07:54:42,924 INFO L93 Difference]: Finished difference Result 128 states and 155 transitions. [2021-12-17 07:54:42,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-12-17 07:54:42,925 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 23 states have internal predecessors, (48), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 35 [2021-12-17 07:54:42,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-17 07:54:42,926 INFO L225 Difference]: With dead ends: 128 [2021-12-17 07:54:42,926 INFO L226 Difference]: Without dead ends: 125 [2021-12-17 07:54:42,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 40 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=146, Invalid=1103, Unknown=15, NotChecked=68, Total=1332 [2021-12-17 07:54:42,928 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 100 mSDsluCounter, 686 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 777 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-12-17 07:54:42,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 777 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 785 Invalid, 0 Unknown, 140 Unchecked, 0.5s Time] [2021-12-17 07:54:42,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-12-17 07:54:42,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 117. [2021-12-17 07:54:42,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 92 states have (on average 1.2173913043478262) internal successors, (112), 101 states have internal predecessors, (112), 19 states have call successors, (19), 6 states have call predecessors, (19), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2021-12-17 07:54:42,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2021-12-17 07:54:42,948 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 35 [2021-12-17 07:54:42,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-17 07:54:42,949 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2021-12-17 07:54:42,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 23 states have internal predecessors, (48), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-12-17 07:54:42,949 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2021-12-17 07:54:42,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-12-17 07:54:42,950 INFO L506 BasicCegarLoop]: Found error trace [2021-12-17 07:54:42,950 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-17 07:54:42,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-12-17 07:54:43,151 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 [2021-12-17 07:54:43,151 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting failErr0ASSERT_VIOLATIONERROR_FUNCTION === [failErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-17 07:54:43,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-17 07:54:43,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1899770360, now seen corresponding path program 1 times [2021-12-17 07:54:43,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-17 07:54:43,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617226259] [2021-12-17 07:54:43,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-17 07:54:43,152 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-17 07:54:43,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 07:54:43,201 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-17 07:54:43,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-17 07:54:43,254 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-17 07:54:43,255 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-17 07:54:43,256 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location failErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-12-17 07:54:43,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-17 07:54:43,260 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-12-17 07:54:43,262 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-17 07:54:43,313 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.12 07:54:43 BoogieIcfgContainer [2021-12-17 07:54:43,314 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-17 07:54:43,314 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-17 07:54:43,314 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-17 07:54:43,315 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-17 07:54:43,315 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.12 07:54:36" (3/4) ... [2021-12-17 07:54:43,317 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-17 07:54:43,377 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-17 07:54:43,377 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-17 07:54:43,378 INFO L158 Benchmark]: Toolchain (without parser) took 8436.65ms. Allocated memory was 81.8MB in the beginning and 161.5MB in the end (delta: 79.7MB). Free memory was 40.1MB in the beginning and 89.3MB in the end (delta: -49.2MB). Peak memory consumption was 33.0MB. Max. memory is 16.1GB. [2021-12-17 07:54:43,378 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 81.8MB. Free memory is still 57.8MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-17 07:54:43,378 INFO L158 Benchmark]: CACSL2BoogieTranslator took 411.12ms. Allocated memory was 81.8MB in the beginning and 102.8MB in the end (delta: 21.0MB). Free memory was 39.9MB in the beginning and 65.1MB in the end (delta: -25.2MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. [2021-12-17 07:54:43,378 INFO L158 Benchmark]: Boogie Procedure Inliner took 70.62ms. Allocated memory is still 102.8MB. Free memory was 65.1MB in the beginning and 62.7MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 07:54:43,381 INFO L158 Benchmark]: Boogie Preprocessor took 35.49ms. Allocated memory is still 102.8MB. Free memory was 62.7MB in the beginning and 60.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-17 07:54:43,381 INFO L158 Benchmark]: RCFGBuilder took 547.32ms. Allocated memory is still 102.8MB. Free memory was 60.3MB in the beginning and 62.0MB in the end (delta: -1.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-17 07:54:43,381 INFO L158 Benchmark]: TraceAbstraction took 7296.22ms. Allocated memory was 102.8MB in the beginning and 161.5MB in the end (delta: 58.7MB). Free memory was 61.5MB in the beginning and 92.4MB in the end (delta: -30.9MB). Peak memory consumption was 28.3MB. Max. memory is 16.1GB. [2021-12-17 07:54:43,381 INFO L158 Benchmark]: Witness Printer took 62.80ms. Allocated memory is still 161.5MB. Free memory was 92.4MB in the beginning and 89.3MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-12-17 07:54:43,384 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 81.8MB. Free memory is still 57.8MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 411.12ms. Allocated memory was 81.8MB in the beginning and 102.8MB in the end (delta: 21.0MB). Free memory was 39.9MB in the beginning and 65.1MB in the end (delta: -25.2MB). Peak memory consumption was 5.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 70.62ms. Allocated memory is still 102.8MB. Free memory was 65.1MB in the beginning and 62.7MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 35.49ms. Allocated memory is still 102.8MB. Free memory was 62.7MB in the beginning and 60.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 547.32ms. Allocated memory is still 102.8MB. Free memory was 60.3MB in the beginning and 62.0MB in the end (delta: -1.7MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * TraceAbstraction took 7296.22ms. Allocated memory was 102.8MB in the beginning and 161.5MB in the end (delta: 58.7MB). Free memory was 61.5MB in the beginning and 92.4MB in the end (delta: -30.9MB). Peak memory consumption was 28.3MB. Max. memory is 16.1GB. * Witness Printer took 62.80ms. Allocated memory is still 161.5MB. Free memory was 92.4MB in the beginning and 89.3MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 565]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L639] const struct node *p1, *p2; [L640] CALL, EXPR create_sll(&p1, &p2) [L588] struct node *list = ((void *)0); VAL [list={6:0}, pp1={7:0}, pp1={7:0}, pp2={5:0}, pp2={5:0}] [L590] CALL chain_node(&list) [L582] CALL, EXPR alloc_node() [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) VAL [ptr={-1:0}] [L576] ptr->next = ((void *)0) [L577] ptr->prev = ((void *)0) [L578] return ptr; VAL [\result={-1:0}, ptr={-1:0}] [L582] RET, EXPR alloc_node() [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) [L583] node->next = *ppnode [L584] *ppnode = node VAL [node={-1:0}, ppnode={6:0}, ppnode={6:0}] [L590] RET chain_node(&list) VAL [list={6:0}, pp1={7:0}, pp1={7:0}, pp2={5:0}, pp2={5:0}] [L591] COND FALSE !(__VERIFIER_nondet_int()) [L592] EXPR \read(*list) [L592] *pp2 = list [L593] COND FALSE !(__VERIFIER_nondet_int()) [L595] EXPR \read(*list) [L595] *pp1 = list [L597] CALL chain_node(&list) [L582] CALL, EXPR alloc_node() [L573] struct node *ptr = malloc(sizeof *ptr); [L574] COND FALSE !(!ptr) VAL [ptr={3:0}] [L576] ptr->next = ((void *)0) [L577] ptr->prev = ((void *)0) [L578] return ptr; VAL [\result={3:0}, ptr={3:0}] [L582] RET, EXPR alloc_node() [L582] struct node *node = alloc_node(); [L583] EXPR \read(**ppnode) [L583] node->next = *ppnode [L584] *ppnode = node VAL [node={3:0}, ppnode={6:0}, ppnode={6:0}] [L597] RET chain_node(&list) VAL [list={6:0}, pp1={7:0}, pp1={7:0}, pp2={5:0}, pp2={5:0}] [L598] COND FALSE !(__VERIFIER_nondet_int()) [L599] EXPR \read(*list) [L599] return list; [L588] struct node *list = ((void *)0); [L599] return list; VAL [\result={3:0}, pp1={7:0}, pp1={7:0}, pp2={5:0}, pp2={5:0}] [L640] RET, EXPR create_sll(&p1, &p2) [L640] struct node *list = create_sll(&p1, &p2); [L642] EXPR \read(*p1) [L642] EXPR \read(*p2) VAL [\read(*p1)={-1:0}, \read(*p2)={-1:0}, list={3:0}, p1={7:0}, p2={5:0}] [L642] CALL check_seq_next(p1, p2) VAL [beg={-1:0}, end={-1:0}] [L626] COND FALSE !(!(beg)) VAL [beg={-1:0}, beg={-1:0}, end={-1:0}, end={-1:0}] [L627] COND FALSE !(!(end)) VAL [beg={-1:0}, beg={-1:0}, end={-1:0}, end={-1:0}] [L628] EXPR beg->next [L628] beg = beg->next [L628] COND TRUE end != beg VAL [beg={-1:0}, beg={0:0}, end={-1:0}, end={-1:0}] [L629] COND TRUE !(beg) VAL [beg={0:0}, beg={-1:0}, end={-1:0}, end={-1:0}] [L629] CALL fail() [L565] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 96 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 7.2s, OverallIterations: 4, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 1.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 237 SdHoareTripleChecker+Valid, 1.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 235 mSDsluCounter, 1677 SdHoareTripleChecker+Invalid, 0.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 440 IncrementalHoareTripleChecker+Unchecked, 1378 mSDsCounter, 98 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1506 IncrementalHoareTripleChecker+Invalid, 2044 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 98 mSolverCounterUnsat, 299 mSDtfsCounter, 1506 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 154 GetRequests, 78 SyntacticMatches, 6 SemanticMatches, 70 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 439 ImplicationChecksByTransitivity, 1.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=117occurred in iteration=2, InterpolantAutomatonStates: 38, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 3 MinimizatonAttempts, 17 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 4.0s InterpolantComputationTime, 191 NumberOfCodeBlocks, 191 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 147 ConstructedInterpolants, 22 QuantifiedInterpolants, 3337 SizeOfPredicates, 49 NumberOfNonLiveVariables, 680 ConjunctsInSsa, 148 ConjunctsInUnsatCore, 5 InterpolantComputations, 1 PerfectInterpolantSequences, 10/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-12-17 07:54:43,425 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE