./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/forester-heap/sll-circular-2.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/forester-heap/sll-circular-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 f91abcd8d9f4c4a9bb166bca3090e9f421fd2afed3c0226bce3d2e7c0b6ce95e --- Real Ultimate output --- This is Ultimate 0.2.2-tmp.no-commuhash-c3fed41 [2021-12-15 23:53:55,415 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-15 23:53:55,417 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-15 23:53:55,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-15 23:53:55,462 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-15 23:53:55,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-15 23:53:55,466 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-15 23:53:55,469 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-15 23:53:55,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-15 23:53:55,475 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-15 23:53:55,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-15 23:53:55,477 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-15 23:53:55,477 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-15 23:53:55,479 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-15 23:53:55,481 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-15 23:53:55,484 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-15 23:53:55,485 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-15 23:53:55,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-15 23:53:55,487 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-15 23:53:55,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-15 23:53:55,493 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-15 23:53:55,494 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-15 23:53:55,496 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-15 23:53:55,496 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-15 23:53:55,502 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-15 23:53:55,502 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-15 23:53:55,502 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-15 23:53:55,504 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-15 23:53:55,504 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-15 23:53:55,505 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-15 23:53:55,505 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-15 23:53:55,506 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-15 23:53:55,507 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-15 23:53:55,509 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-15 23:53:55,510 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-15 23:53:55,510 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-15 23:53:55,511 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-15 23:53:55,511 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-15 23:53:55,511 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-15 23:53:55,512 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-15 23:53:55,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-15 23:53:55,513 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-15 23:53:55,546 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-15 23:53:55,546 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-15 23:53:55,547 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-15 23:53:55,547 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-15 23:53:55,548 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-15 23:53:55,548 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-15 23:53:55,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-15 23:53:55,549 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-15 23:53:55,549 INFO L138 SettingsManager]: * Use SBE=true [2021-12-15 23:53:55,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-15 23:53:55,550 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-15 23:53:55,550 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-15 23:53:55,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-15 23:53:55,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-15 23:53:55,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-15 23:53:55,551 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-15 23:53:55,551 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-15 23:53:55,551 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-15 23:53:55,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-15 23:53:55,551 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-15 23:53:55,552 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-15 23:53:55,552 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-15 23:53:55,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-15 23:53:55,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-15 23:53:55,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:53:55,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-15 23:53:55,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-15 23:53:55,553 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-15 23:53:55,553 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-15 23:53:55,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-15 23:53:55,553 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-15 23:53:55,554 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-15 23:53:55,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-15 23:53:55,554 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-15 23:53:55,554 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f91abcd8d9f4c4a9bb166bca3090e9f421fd2afed3c0226bce3d2e7c0b6ce95e [2021-12-15 23:53:55,792 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-15 23:53:55,818 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-15 23:53:55,821 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-15 23:53:55,822 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-15 23:53:55,822 INFO L275 PluginConnector]: CDTParser initialized [2021-12-15 23:53:55,824 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/forester-heap/sll-circular-2.i [2021-12-15 23:53:55,875 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9198dce3/c38d5165b7f7432f97b06557c7a6e51e/FLAG282cc1ee2 [2021-12-15 23:53:56,355 INFO L306 CDTParser]: Found 1 translation units. [2021-12-15 23:53:56,356 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/forester-heap/sll-circular-2.i [2021-12-15 23:53:56,376 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9198dce3/c38d5165b7f7432f97b06557c7a6e51e/FLAG282cc1ee2 [2021-12-15 23:53:56,677 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b9198dce3/c38d5165b7f7432f97b06557c7a6e51e [2021-12-15 23:53:56,680 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-15 23:53:56,682 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-15 23:53:56,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-15 23:53:56,685 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-15 23:53:56,687 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-15 23:53:56,688 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:53:56" (1/1) ... [2021-12-15 23:53:56,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f6e81a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:53:56, skipping insertion in model container [2021-12-15 23:53:56,689 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.12 11:53:56" (1/1) ... [2021-12-15 23:53:56,694 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-15 23:53:56,731 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-15 23:53:56,934 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/forester-heap/sll-circular-2.i[22324,22337] [2021-12-15 23:53:56,938 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/forester-heap/sll-circular-2.i[22430,22443] [2021-12-15 23:53:56,939 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/forester-heap/sll-circular-2.i[22554,22567] [2021-12-15 23:53:56,942 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:53:56,955 INFO L203 MainTranslator]: Completed pre-run [2021-12-15 23:53:56,997 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/forester-heap/sll-circular-2.i[22324,22337] [2021-12-15 23:53:56,998 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/forester-heap/sll-circular-2.i[22430,22443] [2021-12-15 23:53:57,000 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/forester-heap/sll-circular-2.i[22554,22567] [2021-12-15 23:53:57,005 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-15 23:53:57,028 INFO L208 MainTranslator]: Completed translation [2021-12-15 23:53:57,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:53:57 WrapperNode [2021-12-15 23:53:57,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-15 23:53:57,029 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-15 23:53:57,029 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-15 23:53:57,029 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-15 23:53:57,034 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:53:57" (1/1) ... [2021-12-15 23:53:57,052 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:53:57" (1/1) ... [2021-12-15 23:53:57,080 INFO L137 Inliner]: procedures = 119, calls = 28, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 113 [2021-12-15 23:53:57,080 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-15 23:53:57,081 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-15 23:53:57,082 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-15 23:53:57,082 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-15 23:53:57,089 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:53:57" (1/1) ... [2021-12-15 23:53:57,089 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:53:57" (1/1) ... [2021-12-15 23:53:57,104 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:53:57" (1/1) ... [2021-12-15 23:53:57,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:53:57" (1/1) ... [2021-12-15 23:53:57,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:53:57" (1/1) ... [2021-12-15 23:53:57,124 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:53:57" (1/1) ... [2021-12-15 23:53:57,128 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:53:57" (1/1) ... [2021-12-15 23:53:57,131 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-15 23:53:57,138 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-15 23:53:57,138 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-15 23:53:57,138 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-15 23:53:57,139 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:53:57" (1/1) ... [2021-12-15 23:53:57,146 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-15 23:53:57,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-12-15 23:53:57,163 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) [2021-12-15 23:53:57,168 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 [2021-12-15 23:53:57,199 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-15 23:53:57,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-15 23:53:57,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-15 23:53:57,200 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-15 23:53:57,200 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-15 23:53:57,200 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-15 23:53:57,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-15 23:53:57,201 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-15 23:53:57,201 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-15 23:53:57,201 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-15 23:53:57,313 INFO L236 CfgBuilder]: Building ICFG [2021-12-15 23:53:57,314 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-15 23:53:57,530 INFO L277 CfgBuilder]: Performing block encoding [2021-12-15 23:53:57,535 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-15 23:53:57,536 INFO L301 CfgBuilder]: Removed 9 assume(true) statements. [2021-12-15 23:53:57,537 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:53:57 BoogieIcfgContainer [2021-12-15 23:53:57,537 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-15 23:53:57,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-15 23:53:57,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-15 23:53:57,549 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-15 23:53:57,549 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.12 11:53:56" (1/3) ... [2021-12-15 23:53:57,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a9f8a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:53:57, skipping insertion in model container [2021-12-15 23:53:57,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.12 11:53:57" (2/3) ... [2021-12-15 23:53:57,550 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45a9f8a6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.12 11:53:57, skipping insertion in model container [2021-12-15 23:53:57,550 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:53:57" (3/3) ... [2021-12-15 23:53:57,551 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-circular-2.i [2021-12-15 23:53:57,556 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-15 23:53:57,556 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-12-15 23:53:57,606 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-15 23:53:57,616 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 [2021-12-15 23:53:57,616 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-12-15 23:53:57,631 INFO L276 IsEmpty]: Start isEmpty. Operand has 33 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:53:57,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-12-15 23:53:57,647 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:53:57,647 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-12-15 23:53:57,648 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:53:57,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:53:57,652 INFO L85 PathProgramCache]: Analyzing trace with hash 890892102, now seen corresponding path program 1 times [2021-12-15 23:53:57,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:53:57,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988738717] [2021-12-15 23:53:57,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:53:57,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:53:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:53:57,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:53:57,836 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:53:57,836 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988738717] [2021-12-15 23:53:57,837 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988738717] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:53:57,837 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:53:57,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-15 23:53:57,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447708152] [2021-12-15 23:53:57,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:53:57,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-15 23:53:57,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:53:57,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-15 23:53:57,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-15 23:53:57,874 INFO L87 Difference]: Start difference. First operand has 33 states, 29 states have (on average 1.7586206896551724) internal successors, (51), 32 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:53:57,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:53:57,891 INFO L93 Difference]: Finished difference Result 64 states and 100 transitions. [2021-12-15 23:53:57,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-15 23:53:57,893 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-12-15 23:53:57,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:53:57,899 INFO L225 Difference]: With dead ends: 64 [2021-12-15 23:53:57,900 INFO L226 Difference]: Without dead ends: 26 [2021-12-15 23:53:57,902 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 [2021-12-15 23:53:57,906 INFO L933 BasicCegarLoop]: 39 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, 39 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 [2021-12-15 23:53:57,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 23:53:57,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-12-15 23:53:57,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-12-15 23:53:57,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:53:57,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2021-12-15 23:53:57,938 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 6 [2021-12-15 23:53:57,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:53:57,939 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2021-12-15 23:53:57,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:53:57,939 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2021-12-15 23:53:57,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-12-15 23:53:57,940 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:53:57,940 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:53:57,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-12-15 23:53:57,940 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:53:57,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:53:57,943 INFO L85 PathProgramCache]: Analyzing trace with hash 1806883023, now seen corresponding path program 1 times [2021-12-15 23:53:57,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:53:57,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384672087] [2021-12-15 23:53:57,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:53:57,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:53:57,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:53:58,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:53:58,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:53:58,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384672087] [2021-12-15 23:53:58,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384672087] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:53:58,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:53:58,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-15 23:53:58,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362031387] [2021-12-15 23:53:58,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:53:58,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-15 23:53:58,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:53:58,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-15 23:53:58,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-15 23:53:58,080 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:53:58,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:53:58,144 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2021-12-15 23:53:58,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-15 23:53:58,144 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2021-12-15 23:53:58,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:53:58,146 INFO L225 Difference]: With dead ends: 42 [2021-12-15 23:53:58,147 INFO L226 Difference]: Without dead ends: 38 [2021-12-15 23:53:58,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-15 23:53:58,152 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:53:58,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 47 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 23:53:58,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-12-15 23:53:58,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2021-12-15 23:53:58,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 27 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:53:58,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2021-12-15 23:53:58,158 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 7 [2021-12-15 23:53:58,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:53:58,158 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2021-12-15 23:53:58,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:53:58,158 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2021-12-15 23:53:58,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-12-15 23:53:58,159 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:53:58,159 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:53:58,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-12-15 23:53:58,159 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:53:58,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:53:58,161 INFO L85 PathProgramCache]: Analyzing trace with hash 706691337, now seen corresponding path program 1 times [2021-12-15 23:53:58,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:53:58,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529790783] [2021-12-15 23:53:58,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:53:58,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:53:58,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-15 23:53:58,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-15 23:53:58,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-15 23:53:58,246 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529790783] [2021-12-15 23:53:58,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529790783] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-15 23:53:58,247 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-15 23:53:58,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-15 23:53:58,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103825642] [2021-12-15 23:53:58,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-15 23:53:58,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-15 23:53:58,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-15 23:53:58,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-15 23:53:58,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:53:58,249 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:53:58,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-15 23:53:58,279 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2021-12-15 23:53:58,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-15 23:53:58,280 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-12-15 23:53:58,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-15 23:53:58,283 INFO L225 Difference]: With dead ends: 71 [2021-12-15 23:53:58,283 INFO L226 Difference]: Without dead ends: 49 [2021-12-15 23:53:58,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-15 23:53:58,289 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 20 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-15 23:53:58,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 48 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-15 23:53:58,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-12-15 23:53:58,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 35. [2021-12-15 23:53:58,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 33 states have (on average 1.303030303030303) internal successors, (43), 34 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:53:58,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 43 transitions. [2021-12-15 23:53:58,300 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 43 transitions. Word has length 10 [2021-12-15 23:53:58,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-15 23:53:58,301 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 43 transitions. [2021-12-15 23:53:58,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-15 23:53:58,301 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 43 transitions. [2021-12-15 23:53:58,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-12-15 23:53:58,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-15 23:53:58,302 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-15 23:53:58,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-12-15 23:53:58,302 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-15 23:53:58,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-15 23:53:58,303 INFO L85 PathProgramCache]: Analyzing trace with hash -84804677, now seen corresponding path program 1 times [2021-12-15 23:53:58,303 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-15 23:53:58,303 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437098047] [2021-12-15 23:53:58,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-15 23:53:58,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-15 23:53:58,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 23:53:58,339 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-12-15 23:53:58,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-12-15 23:53:58,372 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-12-15 23:53:58,373 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-12-15 23:53:58,374 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2021-12-15 23:53:58,375 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2021-12-15 23:53:58,376 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2021-12-15 23:53:58,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-12-15 23:53:58,379 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-12-15 23:53:58,382 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-12-15 23:53:58,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.12 11:53:58 BoogieIcfgContainer [2021-12-15 23:53:58,402 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-12-15 23:53:58,403 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-12-15 23:53:58,403 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-12-15 23:53:58,403 INFO L275 PluginConnector]: Witness Printer initialized [2021-12-15 23:53:58,404 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.12 11:53:57" (3/4) ... [2021-12-15 23:53:58,406 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-12-15 23:53:58,432 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-12-15 23:53:58,432 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-12-15 23:53:58,433 INFO L158 Benchmark]: Toolchain (without parser) took 1750.90ms. Allocated memory is still 90.2MB. Free memory was 61.0MB in the beginning and 38.4MB in the end (delta: 22.6MB). Peak memory consumption was 23.7MB. Max. memory is 16.1GB. [2021-12-15 23:53:58,433 INFO L158 Benchmark]: CDTParser took 0.21ms. Allocated memory is still 90.2MB. Free memory is still 69.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-12-15 23:53:58,433 INFO L158 Benchmark]: CACSL2BoogieTranslator took 344.31ms. Allocated memory is still 90.2MB. Free memory was 60.8MB in the beginning and 43.8MB in the end (delta: 17.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2021-12-15 23:53:58,434 INFO L158 Benchmark]: Boogie Procedure Inliner took 51.47ms. Allocated memory is still 90.2MB. Free memory was 43.8MB in the beginning and 68.5MB in the end (delta: -24.7MB). Peak memory consumption was 6.7MB. Max. memory is 16.1GB. [2021-12-15 23:53:58,434 INFO L158 Benchmark]: Boogie Preprocessor took 55.93ms. Allocated memory is still 90.2MB. Free memory was 68.5MB in the beginning and 66.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 23:53:58,434 INFO L158 Benchmark]: RCFGBuilder took 399.41ms. Allocated memory is still 90.2MB. Free memory was 66.9MB in the beginning and 54.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-12-15 23:53:58,435 INFO L158 Benchmark]: TraceAbstraction took 863.99ms. Allocated memory is still 90.2MB. Free memory was 53.7MB in the beginning and 40.5MB in the end (delta: 13.2MB). Peak memory consumption was 12.8MB. Max. memory is 16.1GB. [2021-12-15 23:53:58,435 INFO L158 Benchmark]: Witness Printer took 29.25ms. Allocated memory is still 90.2MB. Free memory was 40.4MB in the beginning and 38.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-12-15 23:53:58,437 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21ms. Allocated memory is still 90.2MB. Free memory is still 69.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 344.31ms. Allocated memory is still 90.2MB. Free memory was 60.8MB in the beginning and 43.8MB in the end (delta: 17.0MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 51.47ms. Allocated memory is still 90.2MB. Free memory was 43.8MB in the beginning and 68.5MB in the end (delta: -24.7MB). Peak memory consumption was 6.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.93ms. Allocated memory is still 90.2MB. Free memory was 68.5MB in the beginning and 66.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 399.41ms. Allocated memory is still 90.2MB. Free memory was 66.9MB in the beginning and 54.2MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 863.99ms. Allocated memory is still 90.2MB. Free memory was 53.7MB in the beginning and 40.5MB in the end (delta: 13.2MB). Peak memory consumption was 12.8MB. Max. memory is 16.1GB. * Witness Printer took 29.25ms. Allocated memory is still 90.2MB. Free memory was 40.4MB in the beginning and 38.4MB in the end (delta: 2.0MB). Peak memory consumption was 2.1MB. 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: 1032]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L996] SLL* head = malloc(sizeof(SLL)); [L997] head->next = head [L998] head->data = 0 [L1000] SLL* x = head; [L1001] int state = 1; VAL [head={-1:0}, state=1, x={-1:0}] [L1004] COND FALSE !(__VERIFIER_nondet_int()) [L1025] x->data = state [L1027] EXPR head->next [L1027] x = head->next [L1028] COND FALSE !(!(((void*)0) != x)) VAL [head={-1:0}, state=1, x={-1:0}] [L1030] EXPR x->data VAL [head={-1:0}, state=1, x={-1:0}, x->data=1] [L1030] COND TRUE x->data != 0 [L1032] EXPR x->next [L1032] EXPR x->next->data [L1032] EXPR x->next->data != 0 && x->data > x->next->data [L1032] EXPR x->data [L1032] EXPR x->next [L1032] EXPR x->next->data [L1032] EXPR x->next->data != 0 && x->data > x->next->data VAL [head={-1:0}, state=1, x={-1:0}, x->data=1, x->next={-1:0}, x->next={-1:0}, x->next->data=1, x->next->data=1, x->next->data != 0 && x->data > x->next->data=0] [L1032] COND TRUE !(x->next->data != 0 && x->data > x->next->data) [L1032] reach_error() VAL [head={-1:0}, state=1, x={-1:0}] - UnprovableResult [Line: 1023]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1028]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 33 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 0.8s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 44 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 44 mSDsluCounter, 134 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 49 mSDsCounter, 4 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 35 IncrementalHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 4 mSolverCounterUnsat, 85 mSDtfsCounter, 35 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=35occurred in iteration=3, InterpolantAutomatonStates: 9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 3 MinimizatonAttempts, 24 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 36 NumberOfCodeBlocks, 36 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 20 ConstructedInterpolants, 0 QuantifiedInterpolants, 82 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 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! [2021-12-15 23:53:58,473 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