./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_091497ad-9b53-4d23-aa29-3fed0511c4c6/bin/uautomizer/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_091497ad-9b53-4d23-aa29-3fed0511c4c6/bin/uautomizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_091497ad-9b53-4d23-aa29-3fed0511c4c6/bin/uautomizer/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_091497ad-9b53-4d23-aa29-3fed0511c4c6/bin/uautomizer/config/AutomizerReach.xml -i ../../sv-benchmarks/c/forester-heap/dll-token-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_091497ad-9b53-4d23-aa29-3fed0511c4c6/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_091497ad-9b53-4d23-aa29-3fed0511c4c6/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 [2020-11-29 19:49:52,225 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-29 19:49:52,228 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-29 19:49:52,279 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-29 19:49:52,280 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-29 19:49:52,281 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-29 19:49:52,284 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-29 19:49:52,287 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-29 19:49:52,289 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-29 19:49:52,291 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-29 19:49:52,293 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-29 19:49:52,295 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-29 19:49:52,295 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-29 19:49:52,297 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-29 19:49:52,299 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-29 19:49:52,301 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-29 19:49:52,302 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-29 19:49:52,304 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-29 19:49:52,307 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-29 19:49:52,310 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-29 19:49:52,313 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-29 19:49:52,315 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-29 19:49:52,317 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-29 19:49:52,319 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-29 19:49:52,323 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-29 19:49:52,324 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-29 19:49:52,325 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-29 19:49:52,326 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-29 19:49:52,327 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-29 19:49:52,329 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-29 19:49:52,329 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-29 19:49:52,331 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-29 19:49:52,332 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-29 19:49:52,334 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-29 19:49:52,335 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-29 19:49:52,336 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-29 19:49:52,337 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-29 19:49:52,338 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-29 19:49:52,338 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-29 19:49:52,340 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-29 19:49:52,341 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-29 19:49:52,343 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_091497ad-9b53-4d23-aa29-3fed0511c4c6/bin/uautomizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2020-11-29 19:49:52,371 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-29 19:49:52,372 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-29 19:49:52,374 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-29 19:49:52,374 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-29 19:49:52,375 INFO L138 SettingsManager]: * Use SBE=true [2020-11-29 19:49:52,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-29 19:49:52,376 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-29 19:49:52,376 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-29 19:49:52,380 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-29 19:49:52,381 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-29 19:49:52,381 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-29 19:49:52,382 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-29 19:49:52,382 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-29 19:49:52,383 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-29 19:49:52,383 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-29 19:49:52,384 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-29 19:49:52,384 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-29 19:49:52,386 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-29 19:49:52,387 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-29 19:49:52,387 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-29 19:49:52,387 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-29 19:49:52,388 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-29 19:49:52,388 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-29 19:49:52,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-29 19:49:52,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-29 19:49:52,390 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-29 19:49:52,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-29 19:49:52,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-29 19:49:52,391 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-29 19:49:52,391 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_091497ad-9b53-4d23-aa29-3fed0511c4c6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_091497ad-9b53-4d23-aa29-3fed0511c4c6/bin/uautomizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1d66a07d2a90ded112831066684eab385c0c1369 [2020-11-29 19:49:52,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-29 19:49:52,771 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-29 19:49:52,775 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-29 19:49:52,777 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-29 19:49:52,778 INFO L275 PluginConnector]: CDTParser initialized [2020-11-29 19:49:52,779 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_091497ad-9b53-4d23-aa29-3fed0511c4c6/bin/uautomizer/../../sv-benchmarks/c/forester-heap/dll-token-2.i [2020-11-29 19:49:52,911 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_091497ad-9b53-4d23-aa29-3fed0511c4c6/bin/uautomizer/data/b323b2f6c/e9ad14f078914703afbbffc76f7e7d3a/FLAG7bfbd3e97 [2020-11-29 19:49:53,619 INFO L306 CDTParser]: Found 1 translation units. [2020-11-29 19:49:53,620 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_091497ad-9b53-4d23-aa29-3fed0511c4c6/sv-benchmarks/c/forester-heap/dll-token-2.i [2020-11-29 19:49:53,635 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_091497ad-9b53-4d23-aa29-3fed0511c4c6/bin/uautomizer/data/b323b2f6c/e9ad14f078914703afbbffc76f7e7d3a/FLAG7bfbd3e97 [2020-11-29 19:49:53,900 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_091497ad-9b53-4d23-aa29-3fed0511c4c6/bin/uautomizer/data/b323b2f6c/e9ad14f078914703afbbffc76f7e7d3a [2020-11-29 19:49:53,903 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-29 19:49:53,905 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-29 19:49:53,907 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-29 19:49:53,907 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-29 19:49:53,911 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-29 19:49:53,913 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:49:53" (1/1) ... [2020-11-29 19:49:53,915 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1bb6847a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:49:53, skipping insertion in model container [2020-11-29 19:49:53,915 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:49:53" (1/1) ... [2020-11-29 19:49:53,925 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-29 19:49:53,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-29 19:49:54,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:49:54,437 INFO L203 MainTranslator]: Completed pre-run [2020-11-29 19:49:54,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-29 19:49:54,588 INFO L208 MainTranslator]: Completed translation [2020-11-29 19:49:54,589 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:49:54 WrapperNode [2020-11-29 19:49:54,589 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-29 19:49:54,591 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-29 19:49:54,592 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-29 19:49:54,592 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-29 19:49:54,602 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:49:54" (1/1) ... [2020-11-29 19:49:54,620 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:49:54" (1/1) ... [2020-11-29 19:49:54,651 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-29 19:49:54,652 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-29 19:49:54,652 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-29 19:49:54,653 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-29 19:49:54,663 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:49:54" (1/1) ... [2020-11-29 19:49:54,664 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:49:54" (1/1) ... [2020-11-29 19:49:54,669 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:49:54" (1/1) ... [2020-11-29 19:49:54,670 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:49:54" (1/1) ... [2020-11-29 19:49:54,680 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:49:54" (1/1) ... [2020-11-29 19:49:54,687 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:49:54" (1/1) ... [2020-11-29 19:49:54,690 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:49:54" (1/1) ... [2020-11-29 19:49:54,694 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-29 19:49:54,695 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-29 19:49:54,696 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-29 19:49:54,696 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-29 19:49:54,706 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:49:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_091497ad-9b53-4d23-aa29-3fed0511c4c6/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 [2020-11-29 19:49:54,815 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-29 19:49:54,815 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-29 19:49:54,815 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-29 19:49:54,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-29 19:49:54,816 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-29 19:49:54,816 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-29 19:49:54,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-29 19:49:54,816 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-29 19:49:54,816 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-29 19:49:54,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-29 19:49:55,465 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-29 19:49:55,466 INFO L298 CfgBuilder]: Removed 31 assume(true) statements. [2020-11-29 19:49:55,468 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:49:55 BoogieIcfgContainer [2020-11-29 19:49:55,468 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-29 19:49:55,474 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-29 19:49:55,474 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-29 19:49:55,478 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-29 19:49:55,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:49:53" (1/3) ... [2020-11-29 19:49:55,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@214ed688 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:49:55, skipping insertion in model container [2020-11-29 19:49:55,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:49:54" (2/3) ... [2020-11-29 19:49:55,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@214ed688 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:49:55, skipping insertion in model container [2020-11-29 19:49:55,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:49:55" (3/3) ... [2020-11-29 19:49:55,482 INFO L111 eAbstractionObserver]: Analyzing ICFG dll-token-2.i [2020-11-29 19:49:55,492 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-29 19:49:55,497 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 6 error locations. [2020-11-29 19:49:55,518 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-11-29 19:49:55,552 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-29 19:49:55,552 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-29 19:49:55,552 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-29 19:49:55,552 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-29 19:49:55,552 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-29 19:49:55,552 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-29 19:49:55,552 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-29 19:49:55,552 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-29 19:49:55,569 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-11-29 19:49:55,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-29 19:49:55,574 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:49:55,574 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:49:55,575 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]=== [2020-11-29 19:49:55,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:49:55,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1837354219, now seen corresponding path program 1 times [2020-11-29 19:49:55,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:49:55,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133253166] [2020-11-29 19:49:55,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:49:55,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:49:55,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:49:55,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133253166] [2020-11-29 19:49:55,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:49:55,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-29 19:49:55,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877883577] [2020-11-29 19:49:55,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-29 19:49:55,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:49:55,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-29 19:49:55,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-29 19:49:55,846 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 2 states. [2020-11-29 19:49:55,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:49:55,884 INFO L93 Difference]: Finished difference Result 104 states and 162 transitions. [2020-11-29 19:49:55,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-29 19:49:55,886 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 7 [2020-11-29 19:49:55,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:49:55,898 INFO L225 Difference]: With dead ends: 104 [2020-11-29 19:49:55,898 INFO L226 Difference]: Without dead ends: 45 [2020-11-29 19:49:55,904 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 [2020-11-29 19:49:55,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-11-29 19:49:55,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-11-29 19:49:55,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-29 19:49:55,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2020-11-29 19:49:55,978 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 7 [2020-11-29 19:49:55,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:49:55,978 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2020-11-29 19:49:55,979 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-29 19:49:55,979 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2020-11-29 19:49:55,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-29 19:49:55,999 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:49:55,999 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:49:55,999 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-29 19:49:56,000 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]=== [2020-11-29 19:49:56,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:49:56,003 INFO L82 PathProgramCache]: Analyzing trace with hash 1806908811, now seen corresponding path program 1 times [2020-11-29 19:49:56,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:49:56,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649629858] [2020-11-29 19:49:56,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:49:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:49:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:49:56,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649629858] [2020-11-29 19:49:56,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:49:56,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:49:56,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701936116] [2020-11-29 19:49:56,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:49:56,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:49:56,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:49:56,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:49:56,234 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand 4 states. [2020-11-29 19:49:56,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:49:56,397 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2020-11-29 19:49:56,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-29 19:49:56,398 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-29 19:49:56,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:49:56,399 INFO L225 Difference]: With dead ends: 45 [2020-11-29 19:49:56,399 INFO L226 Difference]: Without dead ends: 42 [2020-11-29 19:49:56,401 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 [2020-11-29 19:49:56,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-29 19:49:56,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-29 19:49:56,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-29 19:49:56,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2020-11-29 19:49:56,409 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 7 [2020-11-29 19:49:56,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:49:56,409 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2020-11-29 19:49:56,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:49:56,410 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2020-11-29 19:49:56,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-29 19:49:56,410 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:49:56,411 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:49:56,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-29 19:49:56,411 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]=== [2020-11-29 19:49:56,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:49:56,412 INFO L82 PathProgramCache]: Analyzing trace with hash 178460429, now seen corresponding path program 1 times [2020-11-29 19:49:56,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:49:56,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717153524] [2020-11-29 19:49:56,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:49:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:49:56,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:49:56,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717153524] [2020-11-29 19:49:56,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:49:56,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-29 19:49:56,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217794664] [2020-11-29 19:49:56,494 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-29 19:49:56,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:49:56,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-29 19:49:56,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-29 19:49:56,495 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand 4 states. [2020-11-29 19:49:56,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:49:56,602 INFO L93 Difference]: Finished difference Result 72 states and 75 transitions. [2020-11-29 19:49:56,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-29 19:49:56,605 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-29 19:49:56,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:49:56,607 INFO L225 Difference]: With dead ends: 72 [2020-11-29 19:49:56,607 INFO L226 Difference]: Without dead ends: 69 [2020-11-29 19:49:56,608 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 [2020-11-29 19:49:56,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-29 19:49:56,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 39. [2020-11-29 19:49:56,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-11-29 19:49:56,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2020-11-29 19:49:56,616 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 8 [2020-11-29 19:49:56,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:49:56,617 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2020-11-29 19:49:56,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-29 19:49:56,617 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2020-11-29 19:49:56,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 19:49:56,618 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:49:56,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:49:56,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-29 19:49:56,619 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]=== [2020-11-29 19:49:56,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:49:56,620 INFO L82 PathProgramCache]: Analyzing trace with hash 566715598, now seen corresponding path program 1 times [2020-11-29 19:49:56,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:49:56,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46976911] [2020-11-29 19:49:56,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:49:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:49:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:49:56,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46976911] [2020-11-29 19:49:56,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:49:56,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 19:49:56,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980042698] [2020-11-29 19:49:56,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:49:56,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:49:56,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:49:56,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:49:56,754 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand 5 states. [2020-11-29 19:49:56,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:49:56,897 INFO L93 Difference]: Finished difference Result 39 states and 41 transitions. [2020-11-29 19:49:56,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:49:56,898 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-29 19:49:56,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:49:56,899 INFO L225 Difference]: With dead ends: 39 [2020-11-29 19:49:56,899 INFO L226 Difference]: Without dead ends: 36 [2020-11-29 19:49:56,900 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 [2020-11-29 19:49:56,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-29 19:49:56,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-29 19:49:56,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-29 19:49:56,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-11-29 19:49:56,906 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 13 [2020-11-29 19:49:56,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:49:56,907 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-11-29 19:49:56,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:49:56,907 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-11-29 19:49:56,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-29 19:49:56,908 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:49:56,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:49:56,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-29 19:49:56,909 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]=== [2020-11-29 19:49:56,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:49:56,912 INFO L82 PathProgramCache]: Analyzing trace with hash 567669904, now seen corresponding path program 1 times [2020-11-29 19:49:56,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:49:56,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707517331] [2020-11-29 19:49:56,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:49:56,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-29 19:49:57,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-29 19:49:57,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707517331] [2020-11-29 19:49:57,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-29 19:49:57,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-29 19:49:57,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291879882] [2020-11-29 19:49:57,152 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-29 19:49:57,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-29 19:49:57,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-29 19:49:57,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-29 19:49:57,153 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 5 states. [2020-11-29 19:49:57,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-29 19:49:57,415 INFO L93 Difference]: Finished difference Result 74 states and 79 transitions. [2020-11-29 19:49:57,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-29 19:49:57,417 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-29 19:49:57,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-29 19:49:57,418 INFO L225 Difference]: With dead ends: 74 [2020-11-29 19:49:57,418 INFO L226 Difference]: Without dead ends: 47 [2020-11-29 19:49:57,419 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 [2020-11-29 19:49:57,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-29 19:49:57,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2020-11-29 19:49:57,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-29 19:49:57,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-11-29 19:49:57,432 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 13 [2020-11-29 19:49:57,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-29 19:49:57,432 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-11-29 19:49:57,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-29 19:49:57,433 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-11-29 19:49:57,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-29 19:49:57,435 INFO L414 BasicCegarLoop]: Found error trace [2020-11-29 19:49:57,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-29 19:49:57,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-29 19:49:57,437 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]=== [2020-11-29 19:49:57,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-29 19:49:57,438 INFO L82 PathProgramCache]: Analyzing trace with hash -892989727, now seen corresponding path program 1 times [2020-11-29 19:49:57,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-29 19:49:57,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834361671] [2020-11-29 19:49:57,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-29 19:49:57,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:49:57,505 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:49:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-29 19:49:57,550 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-29 19:49:57,594 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-11-29 19:49:57,595 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-29 19:49:57,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-29 19:49:57,655 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 07:49:57 BoogieIcfgContainer [2020-11-29 19:49:57,655 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-29 19:49:57,656 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-29 19:49:57,657 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-29 19:49:57,657 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-29 19:49:57,658 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:49:55" (3/4) ... [2020-11-29 19:49:57,660 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-11-29 19:49:57,734 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_091497ad-9b53-4d23-aa29-3fed0511c4c6/bin/uautomizer/witness.graphml [2020-11-29 19:49:57,738 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-29 19:49:57,745 INFO L168 Benchmark]: Toolchain (without parser) took 3838.90 ms. Allocated memory was 79.7 MB in the beginning and 125.8 MB in the end (delta: 46.1 MB). Free memory was 47.3 MB in the beginning and 92.9 MB in the end (delta: -45.6 MB). Peak memory consumption was 1.3 MB. Max. memory is 16.1 GB. [2020-11-29 19:49:57,747 INFO L168 Benchmark]: CDTParser took 0.40 ms. Allocated memory is still 79.7 MB. Free memory was 40.4 MB in the beginning and 40.4 MB in the end (delta: 43.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:49:57,748 INFO L168 Benchmark]: CACSL2BoogieTranslator took 682.99 ms. Allocated memory was 79.7 MB in the beginning and 102.8 MB in the end (delta: 23.1 MB). Free memory was 47.0 MB in the beginning and 69.0 MB in the end (delta: -22.0 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2020-11-29 19:49:57,750 INFO L168 Benchmark]: Boogie Procedure Inliner took 60.19 ms. Allocated memory is still 102.8 MB. Free memory was 69.0 MB in the beginning and 67.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:49:57,751 INFO L168 Benchmark]: Boogie Preprocessor took 42.47 ms. Allocated memory is still 102.8 MB. Free memory was 66.8 MB in the beginning and 65.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:49:57,752 INFO L168 Benchmark]: RCFGBuilder took 773.27 ms. Allocated memory is still 102.8 MB. Free memory was 65.1 MB in the beginning and 67.1 MB in the end (delta: -2.0 MB). Peak memory consumption was 16.7 MB. Max. memory is 16.1 GB. [2020-11-29 19:49:57,753 INFO L168 Benchmark]: TraceAbstraction took 2181.52 ms. Allocated memory was 102.8 MB in the beginning and 125.8 MB in the end (delta: 23.1 MB). Free memory was 66.8 MB in the beginning and 95.5 MB in the end (delta: -28.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-29 19:49:57,754 INFO L168 Benchmark]: Witness Printer took 86.21 ms. Allocated memory is still 125.8 MB. Free memory was 95.5 MB in the beginning and 92.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-29 19:49:57,757 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.40 ms. Allocated memory is still 79.7 MB. Free memory was 40.4 MB in the beginning and 40.4 MB in the end (delta: 43.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 682.99 ms. Allocated memory was 79.7 MB in the beginning and 102.8 MB in the end (delta: 23.1 MB). Free memory was 47.0 MB in the beginning and 69.0 MB in the end (delta: -22.0 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 60.19 ms. Allocated memory is still 102.8 MB. Free memory was 69.0 MB in the beginning and 67.2 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 42.47 ms. Allocated memory is still 102.8 MB. Free memory was 66.8 MB in the beginning and 65.1 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 773.27 ms. Allocated memory is still 102.8 MB. Free memory was 65.1 MB in the beginning and 67.1 MB in the end (delta: -2.0 MB). Peak memory consumption was 16.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2181.52 ms. Allocated memory was 102.8 MB in the beginning and 125.8 MB in the end (delta: 23.1 MB). Free memory was 66.8 MB in the beginning and 95.5 MB in the end (delta: -28.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 86.21 ms. Allocated memory is still 125.8 MB. Free memory was 95.5 MB in the beginning and 92.9 MB in the end (delta: 2.6 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: 2.0s, 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, 0.4s 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, 0.2s SatisfiabilityAnalysisTime, 0.4s 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...