./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_b8bbbf12-742d-48b0-8acf-003b88d86854/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_b8bbbf12-742d-48b0-8acf-003b88d86854/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_b8bbbf12-742d-48b0-8acf-003b88d86854/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_b8bbbf12-742d-48b0-8acf-003b88d86854/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_b8bbbf12-742d-48b0-8acf-003b88d86854/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_b8bbbf12-742d-48b0-8acf-003b88d86854/bin/uautomizer --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 3589167bbf5d7f5cd80f4f92aa27b7dbe19a0217 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 03:11:50,922 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 03:11:50,925 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 03:11:50,986 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 03:11:51,005 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 03:11:51,006 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 03:11:51,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 03:11:51,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 03:11:51,020 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 03:11:51,021 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 03:11:51,023 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 03:11:51,026 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 03:11:51,026 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 03:11:51,028 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 03:11:51,030 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 03:11:51,032 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 03:11:51,033 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 03:11:51,034 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 03:11:51,037 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 03:11:51,040 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 03:11:51,043 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 03:11:51,045 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 03:11:51,047 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 03:11:51,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 03:11:51,053 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 03:11:51,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 03:11:51,054 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 03:11:51,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 03:11:51,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 03:11:51,057 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 03:11:51,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 03:11:51,059 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 03:11:51,061 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 03:11:51,062 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 03:11:51,064 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 03:11:51,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 03:11:51,067 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 03:11:51,068 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 03:11:51,069 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 03:11:51,070 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 03:11:51,072 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 03:11:51,073 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_b8bbbf12-742d-48b0-8acf-003b88d86854/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 03:11:51,121 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 03:11:51,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 03:11:51,127 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 03:11:51,128 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 03:11:51,128 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 03:11:51,128 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 03:11:51,129 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 03:11:51,129 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 03:11:51,129 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 03:11:51,129 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 03:11:51,131 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 03:11:51,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 03:11:51,131 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 03:11:51,131 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 03:11:51,132 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 03:11:51,132 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 03:11:51,132 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 03:11:51,133 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 03:11:51,133 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 03:11:51,133 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 03:11:51,133 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 03:11:51,134 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:11:51,134 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 03:11:51,134 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 03:11:51,134 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 03:11:51,135 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 03:11:51,135 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 03:11:51,135 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 03:11:51,136 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 03:11:51,136 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:/tmp/vcloud-vcloud-master/worker/run_dir_b8bbbf12-742d-48b0-8acf-003b88d86854/bin/uautomizer/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_b8bbbf12-742d-48b0-8acf-003b88d86854/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3589167bbf5d7f5cd80f4f92aa27b7dbe19a0217 [2020-11-28 03:11:51,419 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 03:11:51,455 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 03:11:51,458 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 03:11:51,459 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 03:11:51,460 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 03:11:51,461 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_b8bbbf12-742d-48b0-8acf-003b88d86854/bin/uautomizer/../../sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i [2020-11-28 03:11:51,562 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b8bbbf12-742d-48b0-8acf-003b88d86854/bin/uautomizer/data/7176cfedc/fda618ac2ae44ad78114eae8876047cf/FLAG55a66125a [2020-11-28 03:11:52,118 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 03:11:52,119 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_b8bbbf12-742d-48b0-8acf-003b88d86854/sv-benchmarks/c/list-ext3-properties/sll_length_check-1.i [2020-11-28 03:11:52,133 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_b8bbbf12-742d-48b0-8acf-003b88d86854/bin/uautomizer/data/7176cfedc/fda618ac2ae44ad78114eae8876047cf/FLAG55a66125a [2020-11-28 03:11:52,438 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_b8bbbf12-742d-48b0-8acf-003b88d86854/bin/uautomizer/data/7176cfedc/fda618ac2ae44ad78114eae8876047cf [2020-11-28 03:11:52,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 03:11:52,445 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 03:11:52,453 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 03:11:52,453 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 03:11:52,461 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 03:11:52,462 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:11:52" (1/1) ... [2020-11-28 03:11:52,465 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4314eb88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:52, skipping insertion in model container [2020-11-28 03:11:52,465 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 03:11:52" (1/1) ... [2020-11-28 03:11:52,474 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 03:11:52,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 03:11:52,899 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:11:52,911 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 03:11:52,950 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 03:11:53,005 INFO L208 MainTranslator]: Completed translation [2020-11-28 03:11:53,006 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:53 WrapperNode [2020-11-28 03:11:53,006 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 03:11:53,007 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 03:11:53,007 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 03:11:53,008 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 03:11:53,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:53" (1/1) ... [2020-11-28 03:11:53,032 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:53" (1/1) ... [2020-11-28 03:11:53,065 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 03:11:53,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 03:11:53,066 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 03:11:53,066 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 03:11:53,078 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:53" (1/1) ... [2020-11-28 03:11:53,078 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:53" (1/1) ... [2020-11-28 03:11:53,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:53" (1/1) ... [2020-11-28 03:11:53,091 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:53" (1/1) ... [2020-11-28 03:11:53,107 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:53" (1/1) ... [2020-11-28 03:11:53,119 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:53" (1/1) ... [2020-11-28 03:11:53,126 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:53" (1/1) ... [2020-11-28 03:11:53,130 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 03:11:53,131 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 03:11:53,131 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 03:11:53,131 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 03:11:53,145 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:53" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b8bbbf12-742d-48b0-8acf-003b88d86854/bin/uautomizer/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 03:11:53,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 03:11:53,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-28 03:11:53,233 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 03:11:53,233 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-28 03:11:53,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 03:11:53,233 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 03:11:53,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 03:11:53,233 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 03:11:53,653 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 03:11:53,654 INFO L298 CfgBuilder]: Removed 18 assume(true) statements. [2020-11-28 03:11:53,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:11:53 BoogieIcfgContainer [2020-11-28 03:11:53,655 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 03:11:53,657 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 03:11:53,657 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 03:11:53,660 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 03:11:53,661 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 03:11:52" (1/3) ... [2020-11-28 03:11:53,661 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@237f3807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:11:53, skipping insertion in model container [2020-11-28 03:11:53,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 03:11:53" (2/3) ... [2020-11-28 03:11:53,662 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@237f3807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 03:11:53, skipping insertion in model container [2020-11-28 03:11:53,662 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:11:53" (3/3) ... [2020-11-28 03:11:53,663 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_length_check-1.i [2020-11-28 03:11:53,674 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 03:11:53,678 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-28 03:11:53,689 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-28 03:11:53,711 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 03:11:53,712 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 03:11:53,712 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 03:11:53,712 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 03:11:53,712 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 03:11:53,712 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 03:11:53,712 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 03:11:53,713 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 03:11:53,725 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-11-28 03:11:53,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 03:11:53,730 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:53,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:53,731 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:53,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:53,737 INFO L82 PathProgramCache]: Analyzing trace with hash 191422306, now seen corresponding path program 1 times [2020-11-28 03:11:53,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:53,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787754012] [2020-11-28 03:11:53,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:53,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:53,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:53,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787754012] [2020-11-28 03:11:53,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:11:53,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 03:11:53,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164988245] [2020-11-28 03:11:53,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 03:11:53,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:53,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 03:11:53,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 03:11:53,879 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-11-28 03:11:53,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:53,895 INFO L93 Difference]: Finished difference Result 46 states and 65 transitions. [2020-11-28 03:11:53,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 03:11:53,897 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 14 [2020-11-28 03:11:53,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:53,905 INFO L225 Difference]: With dead ends: 46 [2020-11-28 03:11:53,905 INFO L226 Difference]: Without dead ends: 19 [2020-11-28 03:11:53,908 INFO L677 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 [2020-11-28 03:11:53,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-11-28 03:11:53,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-11-28 03:11:53,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-11-28 03:11:53,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2020-11-28 03:11:53,941 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 14 [2020-11-28 03:11:53,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:53,942 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2020-11-28 03:11:53,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 03:11:53,942 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2020-11-28 03:11:53,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 03:11:53,943 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:53,943 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:53,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 03:11:53,943 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:53,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:53,944 INFO L82 PathProgramCache]: Analyzing trace with hash -992019435, now seen corresponding path program 1 times [2020-11-28 03:11:53,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:53,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130851739] [2020-11-28 03:11:53,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:53,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:54,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:54,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130851739] [2020-11-28 03:11:54,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:11:54,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 03:11:54,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6336731] [2020-11-28 03:11:54,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 03:11:54,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:54,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 03:11:54,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 03:11:54,045 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand 4 states. [2020-11-28 03:11:54,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:54,173 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2020-11-28 03:11:54,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 03:11:54,176 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-11-28 03:11:54,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:54,177 INFO L225 Difference]: With dead ends: 49 [2020-11-28 03:11:54,177 INFO L226 Difference]: Without dead ends: 39 [2020-11-28 03:11:54,178 INFO L677 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 [2020-11-28 03:11:54,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-11-28 03:11:54,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 24. [2020-11-28 03:11:54,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-28 03:11:54,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2020-11-28 03:11:54,189 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 16 [2020-11-28 03:11:54,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:54,189 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2020-11-28 03:11:54,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 03:11:54,200 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2020-11-28 03:11:54,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-28 03:11:54,202 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:54,202 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:54,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 03:11:54,204 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:54,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:54,207 INFO L82 PathProgramCache]: Analyzing trace with hash 617811326, now seen corresponding path program 1 times [2020-11-28 03:11:54,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:54,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767432143] [2020-11-28 03:11:54,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:54,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:54,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:54,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767432143] [2020-11-28 03:11:54,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 03:11:54,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-28 03:11:54,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979585531] [2020-11-28 03:11:54,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:11:54,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:54,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:11:54,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:11:54,357 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand 6 states. [2020-11-28 03:11:54,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:54,448 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2020-11-28 03:11:54,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 03:11:54,449 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-11-28 03:11:54,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:54,450 INFO L225 Difference]: With dead ends: 45 [2020-11-28 03:11:54,450 INFO L226 Difference]: Without dead ends: 38 [2020-11-28 03:11:54,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-28 03:11:54,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-11-28 03:11:54,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 28. [2020-11-28 03:11:54,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-28 03:11:54,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2020-11-28 03:11:54,458 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 19 [2020-11-28 03:11:54,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:54,458 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2020-11-28 03:11:54,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:11:54,459 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2020-11-28 03:11:54,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-28 03:11:54,459 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:54,460 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:54,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 03:11:54,460 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:54,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:54,461 INFO L82 PathProgramCache]: Analyzing trace with hash -2029446786, now seen corresponding path program 1 times [2020-11-28 03:11:54,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:54,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910245638] [2020-11-28 03:11:54,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:54,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:54,573 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:54,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910245638] [2020-11-28 03:11:54,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986625420] [2020-11-28 03:11:54,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b8bbbf12-742d-48b0-8acf-003b88d86854/bin/uautomizer/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:11:54,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:54,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 03:11:54,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:54,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:54,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-28 03:11:54,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2020-11-28 03:11:54,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665298110] [2020-11-28 03:11:54,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 03:11:54,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:54,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 03:11:54,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:11:54,767 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand 5 states. [2020-11-28 03:11:54,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:54,834 INFO L93 Difference]: Finished difference Result 52 states and 59 transitions. [2020-11-28 03:11:54,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 03:11:54,835 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-11-28 03:11:54,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:54,836 INFO L225 Difference]: With dead ends: 52 [2020-11-28 03:11:54,836 INFO L226 Difference]: Without dead ends: 42 [2020-11-28 03:11:54,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-11-28 03:11:54,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-28 03:11:54,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 21. [2020-11-28 03:11:54,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-28 03:11:54,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2020-11-28 03:11:54,842 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 19 [2020-11-28 03:11:54,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:54,842 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2020-11-28 03:11:54,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 03:11:54,843 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2020-11-28 03:11:54,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-28 03:11:54,843 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:54,844 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:55,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:11:55,059 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:55,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:55,059 INFO L82 PathProgramCache]: Analyzing trace with hash 72340444, now seen corresponding path program 1 times [2020-11-28 03:11:55,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:55,060 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232187910] [2020-11-28 03:11:55,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:55,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:55,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:11:55,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232187910] [2020-11-28 03:11:55,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996165466] [2020-11-28 03:11:55,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b8bbbf12-742d-48b0-8acf-003b88d86854/bin/uautomizer/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:11:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:55,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-28 03:11:55,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:11:55,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:55,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-28 03:11:55,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594313310] [2020-11-28 03:11:55,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 03:11:55,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:55,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 03:11:55,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 03:11:55,331 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand 6 states. [2020-11-28 03:11:55,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:55,472 INFO L93 Difference]: Finished difference Result 61 states and 69 transitions. [2020-11-28 03:11:55,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 03:11:55,474 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-11-28 03:11:55,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:55,475 INFO L225 Difference]: With dead ends: 61 [2020-11-28 03:11:55,475 INFO L226 Difference]: Without dead ends: 50 [2020-11-28 03:11:55,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:11:55,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-28 03:11:55,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 24. [2020-11-28 03:11:55,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-28 03:11:55,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-11-28 03:11:55,486 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 20 [2020-11-28 03:11:55,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:55,486 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-11-28 03:11:55,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 03:11:55,486 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-11-28 03:11:55,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-28 03:11:55,487 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:55,487 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:55,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:11:55,688 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:55,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:55,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1067124933, now seen corresponding path program 2 times [2020-11-28 03:11:55,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:55,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818024470] [2020-11-28 03:11:55,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:55,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:55,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 03:11:55,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818024470] [2020-11-28 03:11:55,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324523791] [2020-11-28 03:11:55,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b8bbbf12-742d-48b0-8acf-003b88d86854/bin/uautomizer/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:11:55,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-28 03:11:55,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:11:55,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 03:11:55,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:56,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-28 03:11:56,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:56,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6] total 12 [2020-11-28 03:11:56,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718356973] [2020-11-28 03:11:56,033 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-28 03:11:56,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:56,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-28 03:11:56,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-11-28 03:11:56,034 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 12 states. [2020-11-28 03:11:56,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:56,356 INFO L93 Difference]: Finished difference Result 39 states and 44 transitions. [2020-11-28 03:11:56,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-28 03:11:56,357 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 23 [2020-11-28 03:11:56,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:56,358 INFO L225 Difference]: With dead ends: 39 [2020-11-28 03:11:56,358 INFO L226 Difference]: Without dead ends: 28 [2020-11-28 03:11:56,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2020-11-28 03:11:56,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-28 03:11:56,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-28 03:11:56,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-28 03:11:56,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2020-11-28 03:11:56,366 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 23 [2020-11-28 03:11:56,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:56,367 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2020-11-28 03:11:56,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-28 03:11:56,367 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2020-11-28 03:11:56,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-28 03:11:56,368 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:56,368 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:56,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:11:56,590 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:56,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:56,590 INFO L82 PathProgramCache]: Analyzing trace with hash -907290146, now seen corresponding path program 3 times [2020-11-28 03:11:56,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:56,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628218168] [2020-11-28 03:11:56,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:56,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 03:11:56,805 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-28 03:11:56,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628218168] [2020-11-28 03:11:56,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384565647] [2020-11-28 03:11:56,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_b8bbbf12-742d-48b0-8acf-003b88d86854/bin/uautomizer/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:11:56,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-28 03:11:56,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-28 03:11:56,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-28 03:11:56,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 03:11:56,924 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-11-28 03:11:56,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-28 03:11:56,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-28 03:11:56,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822600092] [2020-11-28 03:11:56,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 03:11:56,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 03:11:56,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 03:11:56,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-28 03:11:56,926 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand 8 states. [2020-11-28 03:11:57,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 03:11:57,095 INFO L93 Difference]: Finished difference Result 62 states and 68 transitions. [2020-11-28 03:11:57,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 03:11:57,096 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-11-28 03:11:57,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 03:11:57,097 INFO L225 Difference]: With dead ends: 62 [2020-11-28 03:11:57,097 INFO L226 Difference]: Without dead ends: 55 [2020-11-28 03:11:57,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-11-28 03:11:57,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-28 03:11:57,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 45. [2020-11-28 03:11:57,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-28 03:11:57,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 51 transitions. [2020-11-28 03:11:57,115 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 51 transitions. Word has length 27 [2020-11-28 03:11:57,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 03:11:57,116 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 51 transitions. [2020-11-28 03:11:57,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 03:11:57,116 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 51 transitions. [2020-11-28 03:11:57,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-28 03:11:57,117 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 03:11:57,117 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 03:11:57,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 03:11:57,318 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 03:11:57,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 03:11:57,319 INFO L82 PathProgramCache]: Analyzing trace with hash 38835068, now seen corresponding path program 4 times [2020-11-28 03:11:57,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 03:11:57,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861181639] [2020-11-28 03:11:57,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 03:11:57,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:57,372 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 03:11:57,429 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 03:11:57,470 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 03:11:57,470 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 03:11:57,471 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 03:11:57,532 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 03:11:57 BoogieIcfgContainer [2020-11-28 03:11:57,532 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 03:11:57,533 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 03:11:57,533 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 03:11:57,533 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 03:11:57,533 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 03:11:53" (3/4) ... [2020-11-28 03:11:57,535 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 03:11:57,621 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_b8bbbf12-742d-48b0-8acf-003b88d86854/bin/uautomizer/witness.graphml [2020-11-28 03:11:57,621 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 03:11:57,623 INFO L168 Benchmark]: Toolchain (without parser) took 5176.46 ms. Allocated memory was 123.7 MB in the beginning and 148.9 MB in the end (delta: 25.2 MB). Free memory was 89.8 MB in the beginning and 71.0 MB in the end (delta: 18.8 MB). Peak memory consumption was 43.4 MB. Max. memory is 16.1 GB. [2020-11-28 03:11:57,623 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 75.5 MB. Free memory was 32.7 MB in the beginning and 32.6 MB in the end (delta: 56.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:11:57,624 INFO L168 Benchmark]: CACSL2BoogieTranslator took 553.85 ms. Allocated memory is still 123.7 MB. Free memory was 89.5 MB in the beginning and 87.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 03:11:57,624 INFO L168 Benchmark]: Boogie Procedure Inliner took 57.96 ms. Allocated memory is still 123.7 MB. Free memory was 87.9 MB in the beginning and 85.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 03:11:57,625 INFO L168 Benchmark]: Boogie Preprocessor took 64.01 ms. Allocated memory is still 123.7 MB. Free memory was 85.8 MB in the beginning and 84.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 03:11:57,625 INFO L168 Benchmark]: RCFGBuilder took 524.31 ms. Allocated memory is still 123.7 MB. Free memory was 84.4 MB in the beginning and 66.2 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-11-28 03:11:57,626 INFO L168 Benchmark]: TraceAbstraction took 3875.29 ms. Allocated memory was 123.7 MB in the beginning and 148.9 MB in the end (delta: 25.2 MB). Free memory was 65.5 MB in the beginning and 75.2 MB in the end (delta: -9.7 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.1 GB. [2020-11-28 03:11:57,627 INFO L168 Benchmark]: Witness Printer took 88.44 ms. Allocated memory is still 148.9 MB. Free memory was 75.2 MB in the beginning and 71.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2020-11-28 03:11:57,630 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 75.5 MB. Free memory was 32.7 MB in the beginning and 32.6 MB in the end (delta: 56.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 553.85 ms. Allocated memory is still 123.7 MB. Free memory was 89.5 MB in the beginning and 87.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 57.96 ms. Allocated memory is still 123.7 MB. Free memory was 87.9 MB in the beginning and 85.8 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 64.01 ms. Allocated memory is still 123.7 MB. Free memory was 85.8 MB in the beginning and 84.4 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 524.31 ms. Allocated memory is still 123.7 MB. Free memory was 84.4 MB in the beginning and 66.2 MB in the end (delta: 18.2 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 3875.29 ms. Allocated memory was 123.7 MB in the beginning and 148.9 MB in the end (delta: 25.2 MB). Free memory was 65.5 MB in the beginning and 75.2 MB in the end (delta: -9.7 MB). Peak memory consumption was 18.6 MB. Max. memory is 16.1 GB. * Witness Printer took 88.44 ms. Allocated memory is still 148.9 MB. Free memory was 75.2 MB in the beginning and 71.0 MB in the end (delta: 4.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 12]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L603] int len = 2; [L604] len < 32 && __VERIFIER_nondet_int() [L604] len < 32 && __VERIFIER_nondet_int() [L604] COND FALSE !(len < 32 && __VERIFIER_nondet_int()) [L575] SLL head = ((void *)0); [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) [L581] new_head->next = head [L582] head = new_head [L583] len-- [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) [L581] new_head->next = head [L582] head = new_head [L583] len-- [L576] COND TRUE len > 0 [L577] SLL new_head = (SLL) malloc(sizeof(struct node)); [L578] COND FALSE !(((void *)0) == new_head) [L581] new_head->next = head [L582] head = new_head [L583] len-- [L576] COND FALSE !(len > 0) [L585] return head; [L607] SLL s = sll_create(len + 1); [L588] int len = 0; [L589] COND TRUE \read(head) [L590] len++ [L591] EXPR head->next [L591] head = head->next [L589] COND TRUE \read(head) [L590] len++ [L591] EXPR head->next [L591] head = head->next [L589] COND TRUE \read(head) [L590] len++ [L591] EXPR head->next [L591] head = head->next [L589] COND FALSE !(\read(head)) [L593] return len; [L608] COND TRUE len != sll_length(s) [L12] COND FALSE !(0) [L12] __assert_fail ("0", "sll_length_check-1.c", 3, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 26 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 3.7s, OverallIterations: 8, TraceHistogramMax: 3, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 146 SDtfs, 218 SDslu, 348 SDs, 0 SdLazy, 258 SolverSat, 41 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 142 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=45occurred in iteration=7, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 7 MinimizatonAttempts, 82 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 0.9s InterpolantComputationTime, 255 NumberOfCodeBlocks, 249 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 216 ConstructedInterpolants, 0 QuantifiedInterpolants, 11982 SizeOfPredicates, 12 NumberOfNonLiveVariables, 424 ConjunctsInSsa, 29 ConjunctsInUnsatCore, 11 InterpolantComputations, 4 PerfectInterpolantSequences, 33/53 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! Received shutdown request...