./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/dll-token-2.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_f4f6ab69-6048-41e7-84e0-9710c8fbb158/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_f4f6ab69-6048-41e7-84e0-9710c8fbb158/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_f4f6ab69-6048-41e7-84e0-9710c8fbb158/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_f4f6ab69-6048-41e7-84e0-9710c8fbb158/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-token-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_f4f6ab69-6048-41e7-84e0-9710c8fbb158/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_f4f6ab69-6048-41e7-84e0-9710c8fbb158/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 1d66a07d2a90ded112831066684eab385c0c1369 .......................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 02:57:50,901 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 02:57:50,903 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 02:57:50,969 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 02:57:50,978 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 02:57:50,980 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 02:57:50,987 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 02:57:50,994 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 02:57:50,998 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 02:57:51,000 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 02:57:51,002 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 02:57:51,004 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 02:57:51,005 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 02:57:51,014 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 02:57:51,016 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 02:57:51,018 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 02:57:51,019 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 02:57:51,023 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 02:57:51,025 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 02:57:51,035 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 02:57:51,041 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 02:57:51,043 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 02:57:51,044 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 02:57:51,046 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 02:57:51,049 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 02:57:51,053 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 02:57:51,053 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 02:57:51,055 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 02:57:51,056 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 02:57:51,058 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 02:57:51,058 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 02:57:51,060 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 02:57:51,062 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 02:57:51,063 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 02:57:51,065 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 02:57:51,065 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 02:57:51,066 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 02:57:51,066 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 02:57:51,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 02:57:51,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 02:57:51,069 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 02:57:51,073 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_f4f6ab69-6048-41e7-84e0-9710c8fbb158/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-28 02:57:51,113 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 02:57:51,116 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 02:57:51,118 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 02:57:51,119 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 02:57:51,119 INFO L138 SettingsManager]: * Use SBE=true [2020-11-28 02:57:51,119 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 02:57:51,120 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 02:57:51,120 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 02:57:51,120 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 02:57:51,120 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 02:57:51,121 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-28 02:57:51,122 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 02:57:51,122 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-28 02:57:51,122 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 02:57:51,122 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-28 02:57:51,123 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 02:57:51,123 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-28 02:57:51,123 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 02:57:51,123 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 02:57:51,123 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 02:57:51,124 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 02:57:51,124 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 02:57:51,124 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 02:57:51,124 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 02:57:51,125 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-28 02:57:51,125 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-28 02:57:51,125 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 02:57:51,125 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-28 02:57:51,126 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 02:57:51,126 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_f4f6ab69-6048-41e7-84e0-9710c8fbb158/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_f4f6ab69-6048-41e7-84e0-9710c8fbb158/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d66a07d2a90ded112831066684eab385c0c1369 [2020-11-28 02:57:51,431 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 02:57:51,473 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 02:57:51,480 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 02:57:51,481 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 02:57:51,482 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 02:57:51,483 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_f4f6ab69-6048-41e7-84e0-9710c8fbb158/bin/uautomizer/../../sv-benchmarks/c/forester-heap/dll-token-2.i [2020-11-28 02:57:51,575 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f4f6ab69-6048-41e7-84e0-9710c8fbb158/bin/uautomizer/data/43ef71ac4/73b1324452d947638ab503840e3a39b1/FLAGb9f609bc3 [2020-11-28 02:57:52,186 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 02:57:52,187 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_f4f6ab69-6048-41e7-84e0-9710c8fbb158/sv-benchmarks/c/forester-heap/dll-token-2.i [2020-11-28 02:57:52,208 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_f4f6ab69-6048-41e7-84e0-9710c8fbb158/bin/uautomizer/data/43ef71ac4/73b1324452d947638ab503840e3a39b1/FLAGb9f609bc3 [2020-11-28 02:57:52,491 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_f4f6ab69-6048-41e7-84e0-9710c8fbb158/bin/uautomizer/data/43ef71ac4/73b1324452d947638ab503840e3a39b1 [2020-11-28 02:57:52,493 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 02:57:52,494 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 02:57:52,501 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 02:57:52,501 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 02:57:52,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 02:57:52,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:57:52" (1/1) ... [2020-11-28 02:57:52,517 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e279fc6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:52, skipping insertion in model container [2020-11-28 02:57:52,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 02:57:52" (1/1) ... [2020-11-28 02:57:52,527 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 02:57:52,576 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 02:57:52,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:57:52,917 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 02:57:52,993 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 02:57:53,053 INFO L208 MainTranslator]: Completed translation [2020-11-28 02:57:53,054 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:53 WrapperNode [2020-11-28 02:57:53,054 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 02:57:53,055 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 02:57:53,056 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 02:57:53,056 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 02:57:53,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:53" (1/1) ... [2020-11-28 02:57:53,098 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:53" (1/1) ... [2020-11-28 02:57:53,128 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 02:57:53,129 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 02:57:53,129 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 02:57:53,129 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 02:57:53,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:53" (1/1) ... [2020-11-28 02:57:53,139 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:53" (1/1) ... [2020-11-28 02:57:53,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:53" (1/1) ... [2020-11-28 02:57:53,143 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:53" (1/1) ... [2020-11-28 02:57:53,152 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:53" (1/1) ... [2020-11-28 02:57:53,158 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:53" (1/1) ... [2020-11-28 02:57:53,160 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:53" (1/1) ... [2020-11-28 02:57:53,163 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 02:57:53,164 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 02:57:53,165 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 02:57:53,165 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 02:57:53,166 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:53" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_f4f6ab69-6048-41e7-84e0-9710c8fbb158/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 02:57:53,235 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 02:57:53,235 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 02:57:53,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 02:57:53,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-28 02:57:53,236 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 02:57:53,236 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-28 02:57:53,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-28 02:57:53,236 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 02:57:53,236 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 02:57:53,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 02:57:53,800 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 02:57:53,801 INFO L298 CfgBuilder]: Removed 31 assume(true) statements. [2020-11-28 02:57:53,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:57:53 BoogieIcfgContainer [2020-11-28 02:57:53,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 02:57:53,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 02:57:53,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 02:57:53,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 02:57:53,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 02:57:52" (1/3) ... [2020-11-28 02:57:53,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16c9ec76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:57:53, skipping insertion in model container [2020-11-28 02:57:53,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 02:57:53" (2/3) ... [2020-11-28 02:57:53,812 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16c9ec76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 02:57:53, skipping insertion in model container [2020-11-28 02:57:53,812 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:57:53" (3/3) ... [2020-11-28 02:57:53,814 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-token-2.i [2020-11-28 02:57:53,827 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 02:57:53,832 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-11-28 02:57:53,845 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-11-28 02:57:53,866 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 02:57:53,866 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-28 02:57:53,866 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 02:57:53,867 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 02:57:53,867 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 02:57:53,867 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 02:57:53,867 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 02:57:53,867 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 02:57:53,881 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-11-28 02:57:53,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 02:57:53,886 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:53,887 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:53,888 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:57:53,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:53,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1837354219, now seen corresponding path program 1 times [2020-11-28 02:57:53,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:53,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750896507] [2020-11-28 02:57:53,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:54,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:54,055 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 02:57:54,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750896507] [2020-11-28 02:57:54,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:54,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 02:57:54,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271133055] [2020-11-28 02:57:54,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 02:57:54,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:54,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 02:57:54,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 02:57:54,095 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 2 states. [2020-11-28 02:57:54,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:54,118 INFO L93 Difference]: Finished difference Result 104 states and 162 transitions. [2020-11-28 02:57:54,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 02:57:54,120 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-11-28 02:57:54,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:54,128 INFO L225 Difference]: With dead ends: 104 [2020-11-28 02:57:54,129 INFO L226 Difference]: Without dead ends: 45 [2020-11-28 02:57:54,132 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 02:57:54,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-28 02:57:54,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-11-28 02:57:54,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-28 02:57:54,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-11-28 02:57:54,168 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 7 [2020-11-28 02:57:54,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:54,168 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-11-28 02:57:54,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 02:57:54,168 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-11-28 02:57:54,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-28 02:57:54,169 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:54,169 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:54,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 02:57:54,170 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:57:54,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:54,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1806908811, now seen corresponding path program 1 times [2020-11-28 02:57:54,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:54,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701154691] [2020-11-28 02:57:54,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:54,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:54,291 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 02:57:54,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701154691] [2020-11-28 02:57:54,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:54,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 02:57:54,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101866545] [2020-11-28 02:57:54,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 02:57:54,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:54,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 02:57:54,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:57:54,295 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 4 states. [2020-11-28 02:57:54,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:54,459 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-11-28 02:57:54,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-28 02:57:54,461 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-28 02:57:54,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:54,462 INFO L225 Difference]: With dead ends: 45 [2020-11-28 02:57:54,462 INFO L226 Difference]: Without dead ends: 42 [2020-11-28 02:57:54,463 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 02:57:54,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-28 02:57:54,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-28 02:57:54,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-28 02:57:54,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-11-28 02:57:54,479 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 7 [2020-11-28 02:57:54,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:54,479 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-11-28 02:57:54,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 02:57:54,480 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-11-28 02:57:54,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 02:57:54,481 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:54,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:54,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 02:57:54,483 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:57:54,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:54,485 INFO L82 PathProgramCache]: Analyzing trace with hash 178460429, now seen corresponding path program 1 times [2020-11-28 02:57:54,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:54,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656983509] [2020-11-28 02:57:54,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:54,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:54,591 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 02:57:54,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656983509] [2020-11-28 02:57:54,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:54,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 02:57:54,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655380794] [2020-11-28 02:57:54,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 02:57:54,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:54,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 02:57:54,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 02:57:54,594 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 4 states. [2020-11-28 02:57:54,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:54,710 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2020-11-28 02:57:54,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 02:57:54,713 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-28 02:57:54,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:54,714 INFO L225 Difference]: With dead ends: 72 [2020-11-28 02:57:54,715 INFO L226 Difference]: Without dead ends: 69 [2020-11-28 02:57:54,715 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 02:57:54,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-28 02:57:54,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 39. [2020-11-28 02:57:54,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-28 02:57:54,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-11-28 02:57:54,722 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 8 [2020-11-28 02:57:54,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:54,723 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-11-28 02:57:54,723 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 02:57:54,723 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-11-28 02:57:54,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 02:57:54,724 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:54,724 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:54,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 02:57:54,724 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:57:54,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:54,725 INFO L82 PathProgramCache]: Analyzing trace with hash 566715598, now seen corresponding path program 1 times [2020-11-28 02:57:54,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:54,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731943057] [2020-11-28 02:57:54,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:54,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:54,834 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 02:57:54,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731943057] [2020-11-28 02:57:54,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:54,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 02:57:54,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117814471] [2020-11-28 02:57:54,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:57:54,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:54,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:57:54,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:57:54,836 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 5 states. [2020-11-28 02:57:54,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:54,954 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-11-28 02:57:54,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:57:54,959 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-28 02:57:54,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:54,960 INFO L225 Difference]: With dead ends: 39 [2020-11-28 02:57:54,960 INFO L226 Difference]: Without dead ends: 36 [2020-11-28 02:57:54,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 02:57:54,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-28 02:57:54,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-28 02:57:54,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-28 02:57:54,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-11-28 02:57:54,966 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 13 [2020-11-28 02:57:54,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:54,966 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-11-28 02:57:54,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:57:54,966 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-11-28 02:57:54,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 02:57:54,967 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:54,967 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:54,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 02:57:54,968 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:57:54,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:54,969 INFO L82 PathProgramCache]: Analyzing trace with hash 567669904, now seen corresponding path program 1 times [2020-11-28 02:57:54,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:54,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058993898] [2020-11-28 02:57:54,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:54,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 02:57:55,111 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 02:57:55,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058993898] [2020-11-28 02:57:55,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 02:57:55,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-28 02:57:55,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436448778] [2020-11-28 02:57:55,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 02:57:55,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-28 02:57:55,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 02:57:55,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 02:57:55,114 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 5 states. [2020-11-28 02:57:55,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 02:57:55,336 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2020-11-28 02:57:55,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 02:57:55,338 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-28 02:57:55,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 02:57:55,339 INFO L225 Difference]: With dead ends: 74 [2020-11-28 02:57:55,339 INFO L226 Difference]: Without dead ends: 47 [2020-11-28 02:57:55,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 02:57:55,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-28 02:57:55,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2020-11-28 02:57:55,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-28 02:57:55,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-11-28 02:57:55,346 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 13 [2020-11-28 02:57:55,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 02:57:55,346 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-11-28 02:57:55,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 02:57:55,346 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-11-28 02:57:55,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-28 02:57:55,347 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 02:57:55,347 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 02:57:55,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 02:57:55,347 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr4ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr5ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-28 02:57:55,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 02:57:55,352 INFO L82 PathProgramCache]: Analyzing trace with hash -892989727, now seen corresponding path program 1 times [2020-11-28 02:57:55,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-28 02:57:55,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312613581] [2020-11-28 02:57:55,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 02:57:55,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:57:55,398 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:57:55,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 02:57:55,448 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 02:57:55,486 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-28 02:57:55,486 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 02:57:55,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 02:57:55,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 02:57:55 BoogieIcfgContainer [2020-11-28 02:57:55,536 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 02:57:55,541 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 02:57:55,541 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 02:57:55,542 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 02:57:55,542 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 02:57:53" (3/4) ... [2020-11-28 02:57:55,544 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-28 02:57:55,602 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_f4f6ab69-6048-41e7-84e0-9710c8fbb158/bin/uautomizer/witness.graphml [2020-11-28 02:57:55,603 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 02:57:55,605 INFO L168 Benchmark]: Toolchain (without parser) took 3109.23 ms. Allocated memory was 94.4 MB in the beginning and 115.3 MB in the end (delta: 21.0 MB). Free memory was 59.0 MB in the beginning and 78.2 MB in the end (delta: -19.2 MB). Peak memory consumption was 1.3 MB. Max. memory is 16.1 GB. [2020-11-28 02:57:55,606 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 94.4 MB. Free memory was 68.1 MB in the beginning and 68.0 MB in the end (delta: 27.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:57:55,608 INFO L168 Benchmark]: CACSL2BoogieTranslator took 554.02 ms. Allocated memory is still 94.4 MB. Free memory was 58.7 MB in the beginning and 59.9 MB in the end (delta: -1.2 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. [2020-11-28 02:57:55,608 INFO L168 Benchmark]: Boogie Procedure Inliner took 72.75 ms. Allocated memory is still 94.4 MB. Free memory was 59.9 MB in the beginning and 57.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:57:55,609 INFO L168 Benchmark]: Boogie Preprocessor took 34.95 ms. Allocated memory is still 94.4 MB. Free memory was 57.7 MB in the beginning and 56.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:57:55,609 INFO L168 Benchmark]: RCFGBuilder took 638.72 ms. Allocated memory was 94.4 MB in the beginning and 115.3 MB in the end (delta: 21.0 MB). Free memory was 55.8 MB in the beginning and 74.7 MB in the end (delta: -18.9 MB). Peak memory consumption was 12.5 MB. Max. memory is 16.1 GB. [2020-11-28 02:57:55,610 INFO L168 Benchmark]: TraceAbstraction took 1731.36 ms. Allocated memory is still 115.3 MB. Free memory was 74.0 MB in the beginning and 80.3 MB in the end (delta: -6.3 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 02:57:55,610 INFO L168 Benchmark]: Witness Printer took 61.56 ms. Allocated memory is still 115.3 MB. Free memory was 80.3 MB in the beginning and 78.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 02:57:55,613 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 94.4 MB. Free memory was 68.1 MB in the beginning and 68.0 MB in the end (delta: 27.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 554.02 ms. Allocated memory is still 94.4 MB. Free memory was 58.7 MB in the beginning and 59.9 MB in the end (delta: -1.2 MB). Peak memory consumption was 8.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 72.75 ms. Allocated memory is still 94.4 MB. Free memory was 59.9 MB in the beginning and 57.7 MB in the end (delta: 2.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.95 ms. Allocated memory is still 94.4 MB. Free memory was 57.7 MB in the beginning and 56.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 638.72 ms. Allocated memory was 94.4 MB in the beginning and 115.3 MB in the end (delta: 21.0 MB). Free memory was 55.8 MB in the beginning and 74.7 MB in the end (delta: -18.9 MB). Peak memory consumption was 12.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1731.36 ms. Allocated memory is still 115.3 MB. Free memory was 74.0 MB in the beginning and 80.3 MB in the end (delta: -6.3 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 61.56 ms. Allocated memory is still 115.3 MB. Free memory was 80.3 MB in the beginning and 78.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 992]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L1004] SLL* head = malloc(sizeof(SLL)); [L1005] head->next = ((void*)0) [L1006] head->prev = ((void*)0) [L1007] head->data = 0 [L1009] SLL* x = head; [L1012] COND FALSE !(__VERIFIER_nondet_int()) [L1021] x->data = 1 [L1022] x->next = malloc(sizeof(SLL)) [L1023] EXPR x->next [L1023] x->next->prev = x [L1024] EXPR x->next [L1024] x->next->data = 2 [L1026] x = head [L1028] COND FALSE !(!(((void*)0) != x)) [L1030] EXPR x->data [L1030] COND FALSE !(1 != x->data) [L1035] EXPR x->data [L1035] COND FALSE !(!(1 == x->data)) [L1036] EXPR x->next [L1036] x = x->next [L1037] EXPR x->data [L1037] COND TRUE !(2 != x->data) [L992] COND FALSE !(0) [L992] __assert_fail ("0", "dll-token-2.c", 12, __extension__ __PRETTY_FUNCTION__) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 56 locations, 6 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.6s, OverallIterations: 6, TraceHistogramMax: 1, AutomataDifference: 0.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 185 SDtfs, 101 SDslu, 220 SDs, 0 SdLazy, 144 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=56occurred in iteration=0, 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, 5 MinimizatonAttempts, 34 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 65 NumberOfCodeBlocks, 65 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 43 ConstructedInterpolants, 0 QuantifiedInterpolants, 1735 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 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! Received shutdown request...