./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg --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 7887c90df48e0e32a16c0ae4217eb11a41b3b1af1e02493e847dc25239198c19 ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 0.2.1-dev-b2eff8b [2021-10-28 09:26:34,166 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-28 09:26:34,169 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-28 09:26:34,223 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-28 09:26:34,224 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-28 09:26:34,229 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-28 09:26:34,231 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-28 09:26:34,235 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-28 09:26:34,238 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-28 09:26:34,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-28 09:26:34,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-28 09:26:34,249 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-28 09:26:34,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-28 09:26:34,253 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-28 09:26:34,256 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-28 09:26:34,263 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-28 09:26:34,264 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-28 09:26:34,265 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-28 09:26:34,267 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-28 09:26:34,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-28 09:26:34,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-28 09:26:34,275 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-28 09:26:34,282 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-28 09:26:34,283 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-28 09:26:34,293 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-28 09:26:34,293 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-28 09:26:34,294 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-28 09:26:34,296 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-28 09:26:34,296 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-28 09:26:34,298 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-28 09:26:34,299 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-28 09:26:34,300 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-28 09:26:34,302 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-28 09:26:34,303 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-28 09:26:34,305 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-28 09:26:34,305 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-28 09:26:34,306 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-28 09:26:34,306 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-28 09:26:34,306 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-28 09:26:34,307 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-28 09:26:34,308 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-28 09:26:34,309 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-28 09:26:34,363 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-28 09:26:34,363 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-28 09:26:34,364 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-28 09:26:34,364 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-28 09:26:34,365 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-28 09:26:34,365 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-28 09:26:34,366 INFO L138 SettingsManager]: * Use SBE=true [2021-10-28 09:26:34,366 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-28 09:26:34,366 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-28 09:26:34,366 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-28 09:26:34,366 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-28 09:26:34,367 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-28 09:26:34,367 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-28 09:26:34,367 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-28 09:26:34,367 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-28 09:26:34,367 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-28 09:26:34,367 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-28 09:26:34,368 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-28 09:26:34,368 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-28 09:26:34,368 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-28 09:26:34,368 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-28 09:26:34,368 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-28 09:26:34,369 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:26:34,369 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-28 09:26:34,369 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-28 09:26:34,369 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-28 09:26:34,369 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-28 09:26:34,370 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-28 09:26:34,370 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-28 09:26:34,370 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-28 09:26:34,370 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-28 09:26:34,370 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-28 09:26:34,370 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_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7887c90df48e0e32a16c0ae4217eb11a41b3b1af1e02493e847dc25239198c19 [2021-10-28 09:26:34,677 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-28 09:26:34,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-28 09:26:34,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-28 09:26:34,718 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-28 09:26:34,719 INFO L275 PluginConnector]: CDTParser initialized [2021-10-28 09:26:34,720 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/../../sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2021-10-28 09:26:34,795 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/data/ba42fe154/51eb84c644b846f6a29fc52f29fe4aa9/FLAGe2191fedc [2021-10-28 09:26:35,424 INFO L306 CDTParser]: Found 1 translation units. [2021-10-28 09:26:35,427 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i [2021-10-28 09:26:35,447 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/data/ba42fe154/51eb84c644b846f6a29fc52f29fe4aa9/FLAGe2191fedc [2021-10-28 09:26:35,672 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/data/ba42fe154/51eb84c644b846f6a29fc52f29fe4aa9 [2021-10-28 09:26:35,674 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-28 09:26:35,676 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-28 09:26:35,678 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-28 09:26:35,678 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-28 09:26:35,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-28 09:26:35,681 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:26:35" (1/1) ... [2021-10-28 09:26:35,682 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75bc3f5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:35, skipping insertion in model container [2021-10-28 09:26:35,683 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:26:35" (1/1) ... [2021-10-28 09:26:35,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-28 09:26:35,728 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-28 09:26:36,005 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i[24046,24059] [2021-10-28 09:26:36,009 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:26:36,025 INFO L203 MainTranslator]: Completed pre-run [2021-10-28 09:26:36,113 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/sv-benchmarks/c/list-ext3-properties/dll_nullified-1.i[24046,24059] [2021-10-28 09:26:36,114 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-28 09:26:36,153 INFO L208 MainTranslator]: Completed translation [2021-10-28 09:26:36,153 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:36 WrapperNode [2021-10-28 09:26:36,153 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-28 09:26:36,154 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-28 09:26:36,155 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-28 09:26:36,155 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-28 09:26:36,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:36" (1/1) ... [2021-10-28 09:26:36,178 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:36" (1/1) ... [2021-10-28 09:26:36,206 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-28 09:26:36,207 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-28 09:26:36,207 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-28 09:26:36,208 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-28 09:26:36,217 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:36" (1/1) ... [2021-10-28 09:26:36,217 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:36" (1/1) ... [2021-10-28 09:26:36,222 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:36" (1/1) ... [2021-10-28 09:26:36,222 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:36" (1/1) ... [2021-10-28 09:26:36,230 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:36" (1/1) ... [2021-10-28 09:26:36,235 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:36" (1/1) ... [2021-10-28 09:26:36,237 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:36" (1/1) ... [2021-10-28 09:26:36,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-28 09:26:36,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-28 09:26:36,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-28 09:26:36,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-28 09:26:36,243 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:36" (1/1) ... [2021-10-28 09:26:36,252 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-28 09:26:36,266 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:26:36,283 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-28 09:26:36,287 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-28 09:26:36,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-28 09:26:36,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-28 09:26:36,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-28 09:26:36,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-28 09:26:36,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-28 09:26:36,326 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-28 09:26:36,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-28 09:26:36,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-28 09:26:36,327 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-28 09:26:36,327 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-28 09:26:36,703 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-28 09:26:36,703 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-10-28 09:26:36,705 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:26:36 BoogieIcfgContainer [2021-10-28 09:26:36,705 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-28 09:26:36,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-28 09:26:36,708 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-28 09:26:36,711 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-28 09:26:36,712 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:26:35" (1/3) ... [2021-10-28 09:26:36,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5297fb37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:26:36, skipping insertion in model container [2021-10-28 09:26:36,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:26:36" (2/3) ... [2021-10-28 09:26:36,713 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5297fb37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:26:36, skipping insertion in model container [2021-10-28 09:26:36,713 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:26:36" (3/3) ... [2021-10-28 09:26:36,715 INFO L111 eAbstractionObserver]: Analyzing ICFG dll_nullified-1.i [2021-10-28 09:26:36,721 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-28 09:26:36,721 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-28 09:26:36,813 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-28 09:26:36,825 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-28 09:26:36,825 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-28 09:26:36,846 INFO L276 IsEmpty]: Start isEmpty. Operand has 29 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:36,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 09:26:36,853 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:26:36,853 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:26:36,855 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:26:36,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:36,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1957812527, now seen corresponding path program 1 times [2021-10-28 09:26:36,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:36,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150042030] [2021-10-28 09:26:36,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:36,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:26:37,144 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:37,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:26:37,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150042030] [2021-10-28 09:26:37,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150042030] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:26:37,146 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:26:37,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-28 09:26:37,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727423883] [2021-10-28 09:26:37,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-28 09:26:37,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:26:37,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-28 09:26:37,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 09:26:37,175 INFO L87 Difference]: Start difference. First operand has 29 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 28 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:37,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:26:37,197 INFO L93 Difference]: Finished difference Result 48 states and 71 transitions. [2021-10-28 09:26:37,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-28 09:26:37,198 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-28 09:26:37,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:26:37,208 INFO L225 Difference]: With dead ends: 48 [2021-10-28 09:26:37,208 INFO L226 Difference]: Without dead ends: 24 [2021-10-28 09:26:37,211 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-28 09:26:37,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-28 09:26:37,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-28 09:26:37,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:37,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 33 transitions. [2021-10-28 09:26:37,248 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 33 transitions. Word has length 12 [2021-10-28 09:26:37,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:26:37,249 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 33 transitions. [2021-10-28 09:26:37,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:37,250 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 33 transitions. [2021-10-28 09:26:37,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-28 09:26:37,251 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:26:37,252 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:26:37,252 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-28 09:26:37,252 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:26:37,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:37,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1580862863, now seen corresponding path program 1 times [2021-10-28 09:26:37,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:37,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267348778] [2021-10-28 09:26:37,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:37,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:26:37,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:37,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:26:37,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267348778] [2021-10-28 09:26:37,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267348778] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:26:37,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:26:37,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:26:37,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615128637] [2021-10-28 09:26:37,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:26:37,370 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:26:37,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:26:37,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:26:37,372 INFO L87 Difference]: Start difference. First operand 24 states and 33 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:37,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:26:37,413 INFO L93 Difference]: Finished difference Result 46 states and 64 transitions. [2021-10-28 09:26:37,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:26:37,414 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-28 09:26:37,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:26:37,415 INFO L225 Difference]: With dead ends: 46 [2021-10-28 09:26:37,415 INFO L226 Difference]: Without dead ends: 31 [2021-10-28 09:26:37,416 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:26:37,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-28 09:26:37,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2021-10-28 09:26:37,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:37,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 34 transitions. [2021-10-28 09:26:37,427 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 34 transitions. Word has length 12 [2021-10-28 09:26:37,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:26:37,428 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 34 transitions. [2021-10-28 09:26:37,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:37,429 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 34 transitions. [2021-10-28 09:26:37,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:26:37,430 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:26:37,430 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:26:37,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-28 09:26:37,431 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:26:37,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:37,432 INFO L85 PathProgramCache]: Analyzing trace with hash -2031015874, now seen corresponding path program 1 times [2021-10-28 09:26:37,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:37,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379712865] [2021-10-28 09:26:37,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:37,439 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:37,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:26:37,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:37,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:26:37,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379712865] [2021-10-28 09:26:37,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379712865] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:26:37,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:26:37,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-28 09:26:37,574 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290883364] [2021-10-28 09:26:37,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-28 09:26:37,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:26:37,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-28 09:26:37,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:26:37,578 INFO L87 Difference]: Start difference. First operand 25 states and 34 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:37,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:26:37,614 INFO L93 Difference]: Finished difference Result 53 states and 73 transitions. [2021-10-28 09:26:37,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-28 09:26:37,614 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-28 09:26:37,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:26:37,615 INFO L225 Difference]: With dead ends: 53 [2021-10-28 09:26:37,616 INFO L226 Difference]: Without dead ends: 31 [2021-10-28 09:26:37,616 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-28 09:26:37,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-28 09:26:37,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-10-28 09:26:37,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:37,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 40 transitions. [2021-10-28 09:26:37,622 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 40 transitions. Word has length 19 [2021-10-28 09:26:37,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:26:37,622 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 40 transitions. [2021-10-28 09:26:37,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:37,623 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 40 transitions. [2021-10-28 09:26:37,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:26:37,624 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:26:37,624 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:26:37,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-28 09:26:37,625 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:26:37,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:37,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1772850436, now seen corresponding path program 1 times [2021-10-28 09:26:37,626 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:37,626 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622464961] [2021-10-28 09:26:37,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:37,627 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:37,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:26:37,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:37,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:26:37,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622464961] [2021-10-28 09:26:37,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622464961] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-28 09:26:37,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-28 09:26:37,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-10-28 09:26:37,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599139429] [2021-10-28 09:26:37,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-28 09:26:37,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:26:37,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-28 09:26:37,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-10-28 09:26:37,746 INFO L87 Difference]: Start difference. First operand 30 states and 40 transitions. Second operand has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:37,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:26:37,965 INFO L93 Difference]: Finished difference Result 77 states and 107 transitions. [2021-10-28 09:26:37,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-28 09:26:37,966 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-28 09:26:37,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:26:37,967 INFO L225 Difference]: With dead ends: 77 [2021-10-28 09:26:37,968 INFO L226 Difference]: Without dead ends: 64 [2021-10-28 09:26:37,968 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-10-28 09:26:37,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-28 09:26:37,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 37. [2021-10-28 09:26:37,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:37,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 49 transitions. [2021-10-28 09:26:37,977 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 49 transitions. Word has length 19 [2021-10-28 09:26:37,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:26:37,978 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 49 transitions. [2021-10-28 09:26:37,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:37,978 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 49 transitions. [2021-10-28 09:26:37,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-28 09:26:37,980 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:26:37,980 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:26:37,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-28 09:26:37,980 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:26:37,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:37,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1771003394, now seen corresponding path program 1 times [2021-10-28 09:26:37,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:37,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585895387] [2021-10-28 09:26:37,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:37,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:38,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:26:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:38,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:26:38,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585895387] [2021-10-28 09:26:38,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585895387] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:26:38,036 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155351058] [2021-10-28 09:26:38,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:38,037 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:26:38,037 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:26:38,039 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:26:38,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-28 09:26:38,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:26:38,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-28 09:26:38,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:26:38,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:38,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155351058] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:26:38,307 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:26:38,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-10-28 09:26:38,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412788849] [2021-10-28 09:26:38,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-28 09:26:38,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:26:38,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-28 09:26:38,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:26:38,311 INFO L87 Difference]: Start difference. First operand 37 states and 49 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:38,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:26:38,360 INFO L93 Difference]: Finished difference Result 64 states and 86 transitions. [2021-10-28 09:26:38,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-28 09:26:38,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-28 09:26:38,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:26:38,364 INFO L225 Difference]: With dead ends: 64 [2021-10-28 09:26:38,365 INFO L226 Difference]: Without dead ends: 46 [2021-10-28 09:26:38,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-28 09:26:38,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-28 09:26:38,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 39. [2021-10-28 09:26:38,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.3421052631578947) internal successors, (51), 38 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:38,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2021-10-28 09:26:38,381 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 19 [2021-10-28 09:26:38,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:26:38,381 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2021-10-28 09:26:38,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:38,382 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2021-10-28 09:26:38,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-28 09:26:38,385 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:26:38,389 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:26:38,429 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-28 09:26:38,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:26:38,616 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:26:38,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:38,617 INFO L85 PathProgramCache]: Analyzing trace with hash -282378703, now seen corresponding path program 1 times [2021-10-28 09:26:38,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:38,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067785178] [2021-10-28 09:26:38,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:38,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:38,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:26:38,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:38,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:26:38,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067785178] [2021-10-28 09:26:38,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067785178] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:26:38,733 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376044028] [2021-10-28 09:26:38,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:38,733 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:26:38,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:26:38,736 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:26:38,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-28 09:26:38,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:26:38,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-28 09:26:38,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:26:38,943 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:38,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376044028] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:26:38,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:26:38,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-10-28 09:26:38,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416300026] [2021-10-28 09:26:38,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-28 09:26:38,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:26:38,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-28 09:26:38,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:26:38,947 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:38,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:26:38,987 INFO L93 Difference]: Finished difference Result 75 states and 100 transitions. [2021-10-28 09:26:38,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-28 09:26:38,988 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-10-28 09:26:38,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:26:38,991 INFO L225 Difference]: With dead ends: 75 [2021-10-28 09:26:38,992 INFO L226 Difference]: Without dead ends: 55 [2021-10-28 09:26:38,993 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-28 09:26:38,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-28 09:26:39,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2021-10-28 09:26:39,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.3333333333333333) internal successors, (60), 45 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:39,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2021-10-28 09:26:39,014 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 26 [2021-10-28 09:26:39,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:26:39,015 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2021-10-28 09:26:39,015 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 5 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:39,015 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2021-10-28 09:26:39,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-28 09:26:39,017 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:26:39,017 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:26:39,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-28 09:26:39,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:26:39,244 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:26:39,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:39,244 INFO L85 PathProgramCache]: Analyzing trace with hash 700996956, now seen corresponding path program 2 times [2021-10-28 09:26:39,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:39,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076378863] [2021-10-28 09:26:39,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:39,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:39,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:26:39,400 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:39,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:26:39,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076378863] [2021-10-28 09:26:39,401 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076378863] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:26:39,401 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107681550] [2021-10-28 09:26:39,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-28 09:26:39,402 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:26:39,402 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:26:39,405 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:26:39,408 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-28 09:26:39,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-28 09:26:39,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:26:39,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-28 09:26:39,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:26:39,660 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:39,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107681550] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:26:39,660 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:26:39,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-10-28 09:26:39,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677791898] [2021-10-28 09:26:39,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-28 09:26:39,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:26:39,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-28 09:26:39,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:26:39,664 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:39,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:26:39,713 INFO L93 Difference]: Finished difference Result 82 states and 109 transitions. [2021-10-28 09:26:39,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-28 09:26:39,714 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-10-28 09:26:39,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:26:39,716 INFO L225 Difference]: With dead ends: 82 [2021-10-28 09:26:39,716 INFO L226 Difference]: Without dead ends: 62 [2021-10-28 09:26:39,717 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-28 09:26:39,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-28 09:26:39,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 53. [2021-10-28 09:26:39,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 52 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:39,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 69 transitions. [2021-10-28 09:26:39,730 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 69 transitions. Word has length 33 [2021-10-28 09:26:39,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:26:39,731 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 69 transitions. [2021-10-28 09:26:39,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:39,731 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 69 transitions. [2021-10-28 09:26:39,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-28 09:26:39,733 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:26:39,733 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:26:39,773 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-10-28 09:26:39,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:26:39,960 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:26:39,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:39,960 INFO L85 PathProgramCache]: Analyzing trace with hash -338892847, now seen corresponding path program 3 times [2021-10-28 09:26:39,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:39,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713266058] [2021-10-28 09:26:39,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:39,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:39,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:26:40,069 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-28 09:26:40,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:26:40,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713266058] [2021-10-28 09:26:40,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713266058] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:26:40,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155153304] [2021-10-28 09:26:40,076 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-28 09:26:40,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:26:40,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:26:40,082 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:26:40,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-28 09:26:43,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-28 09:26:43,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-28 09:26:43,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-28 09:26:43,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:26:43,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:26:43,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2021-10-28 09:26:43,472 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:26:43,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:26:43,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:26:43,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:26:43,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:26:43,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:26:43,487 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:26:43,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 6 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 60 treesize of output 51 [2021-10-28 09:26:43,501 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:26:43,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:26:43,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:26:43,508 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-10-28 09:26:43,509 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 23 [2021-10-28 09:26:43,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-10-28 09:26:43,608 INFO L354 Elim1Store]: treesize reduction 74, result has 18.7 percent of original size [2021-10-28 09:26:43,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 26 [2021-10-28 09:26:43,852 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 30 proven. 7 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-10-28 09:26:43,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155153304] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:26:43,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:26:43,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 16 [2021-10-28 09:26:43,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279979516] [2021-10-28 09:26:43,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-28 09:26:43,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:26:43,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-28 09:26:43,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-10-28 09:26:43,856 INFO L87 Difference]: Start difference. First operand 53 states and 69 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:44,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:26:44,725 INFO L93 Difference]: Finished difference Result 95 states and 128 transitions. [2021-10-28 09:26:44,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-28 09:26:44,726 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-10-28 09:26:44,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:26:44,728 INFO L225 Difference]: With dead ends: 95 [2021-10-28 09:26:44,728 INFO L226 Difference]: Without dead ends: 75 [2021-10-28 09:26:44,729 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2021-10-28 09:26:44,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-28 09:26:44,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2021-10-28 09:26:44,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.3272727272727274) internal successors, (73), 55 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:44,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 73 transitions. [2021-10-28 09:26:44,737 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 73 transitions. Word has length 40 [2021-10-28 09:26:44,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:26:44,737 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 73 transitions. [2021-10-28 09:26:44,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:44,738 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 73 transitions. [2021-10-28 09:26:44,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 09:26:44,739 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:26:44,740 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:26:44,773 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-28 09:26:44,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-28 09:26:44,960 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:26:44,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:44,960 INFO L85 PathProgramCache]: Analyzing trace with hash 2038353598, now seen corresponding path program 1 times [2021-10-28 09:26:44,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:44,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812028194] [2021-10-28 09:26:44,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:44,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:45,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:26:45,358 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 38 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-10-28 09:26:45,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-28 09:26:45,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812028194] [2021-10-28 09:26:45,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812028194] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:26:45,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628678284] [2021-10-28 09:26:45,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:45,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:26:45,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 [2021-10-28 09:26:45,360 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-28 09:26:45,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-28 09:26:45,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-28 09:26:45,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-28 09:26:45,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-28 09:26:45,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-10-28 09:26:45,652 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-10-28 09:26:45,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2021-10-28 09:26:45,704 INFO L354 Elim1Store]: treesize reduction 21, result has 25.0 percent of original size [2021-10-28 09:26:45,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 17 [2021-10-28 09:26:45,824 INFO L354 Elim1Store]: treesize reduction 156, result has 14.3 percent of original size [2021-10-28 09:26:45,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 60 treesize of output 51 [2021-10-28 09:26:45,851 INFO L354 Elim1Store]: treesize reduction 68, result has 20.0 percent of original size [2021-10-28 09:26:45,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 23 [2021-10-28 09:26:45,930 INFO L354 Elim1Store]: treesize reduction 84, result has 16.8 percent of original size [2021-10-28 09:26:45,931 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 40 treesize of output 27 [2021-10-28 09:26:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 44 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-10-28 09:26:46,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628678284] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-28 09:26:46,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-28 09:26:46,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 19 [2021-10-28 09:26:46,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898960735] [2021-10-28 09:26:46,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-28 09:26:46,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-28 09:26:46,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-28 09:26:46,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=298, Unknown=0, NotChecked=0, Total=342 [2021-10-28 09:26:46,155 INFO L87 Difference]: Start difference. First operand 56 states and 73 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:47,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-28 09:26:47,091 INFO L93 Difference]: Finished difference Result 86 states and 115 transitions. [2021-10-28 09:26:47,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-28 09:26:47,092 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-10-28 09:26:47,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-28 09:26:47,093 INFO L225 Difference]: With dead ends: 86 [2021-10-28 09:26:47,093 INFO L226 Difference]: Without dead ends: 73 [2021-10-28 09:26:47,094 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2021-10-28 09:26:47,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-28 09:26:47,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 58. [2021-10-28 09:26:47,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.3157894736842106) internal successors, (75), 57 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:47,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 75 transitions. [2021-10-28 09:26:47,101 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 75 transitions. Word has length 47 [2021-10-28 09:26:47,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-28 09:26:47,102 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 75 transitions. [2021-10-28 09:26:47,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 19 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-28 09:26:47,102 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 75 transitions. [2021-10-28 09:26:47,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-28 09:26:47,103 INFO L505 BasicCegarLoop]: Found error trace [2021-10-28 09:26:47,103 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:26:47,150 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-10-28 09:26:47,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-28 09:26:47,318 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-28 09:26:47,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-28 09:26:47,319 INFO L85 PathProgramCache]: Analyzing trace with hash 2038355520, now seen corresponding path program 1 times [2021-10-28 09:26:47,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-28 09:26:47,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657164534] [2021-10-28 09:26:47,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-28 09:26:47,319 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-28 09:26:47,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:26:47,453 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-28 09:26:47,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-28 09:26:47,619 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-28 09:26:47,619 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-28 09:26:47,623 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-28 09:26:47,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-28 09:26:47,629 INFO L731 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1] [2021-10-28 09:26:47,633 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-28 09:26:47,704 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.10 09:26:47 BoogieIcfgContainer [2021-10-28 09:26:47,704 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-28 09:26:47,705 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-28 09:26:47,705 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-28 09:26:47,706 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-28 09:26:47,706 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:26:36" (3/4) ... [2021-10-28 09:26:47,708 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-28 09:26:47,792 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/witness.graphml [2021-10-28 09:26:47,792 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-28 09:26:47,794 INFO L168 Benchmark]: Toolchain (without parser) took 12117.74 ms. Allocated memory was 83.9 MB in the beginning and 144.7 MB in the end (delta: 60.8 MB). Free memory was 43.7 MB in the beginning and 103.9 MB in the end (delta: -60.2 MB). Peak memory consumption was 1.9 MB. Max. memory is 16.1 GB. [2021-10-28 09:26:47,795 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 83.9 MB. Free memory is still 61.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-28 09:26:47,795 INFO L168 Benchmark]: CACSL2BoogieTranslator took 475.55 ms. Allocated memory was 83.9 MB in the beginning and 119.5 MB in the end (delta: 35.7 MB). Free memory was 43.5 MB in the beginning and 87.7 MB in the end (delta: -44.1 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. [2021-10-28 09:26:47,796 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.12 ms. Allocated memory is still 119.5 MB. Free memory was 87.7 MB in the beginning and 85.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:26:47,796 INFO L168 Benchmark]: Boogie Preprocessor took 33.99 ms. Allocated memory is still 119.5 MB. Free memory was 85.6 MB in the beginning and 83.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-28 09:26:47,797 INFO L168 Benchmark]: RCFGBuilder took 463.46 ms. Allocated memory is still 119.5 MB. Free memory was 83.5 MB in the beginning and 70.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-28 09:26:47,797 INFO L168 Benchmark]: TraceAbstraction took 10996.83 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 70.0 MB in the beginning and 109.1 MB in the end (delta: -39.1 MB). Peak memory consumption was 60.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:26:47,798 INFO L168 Benchmark]: Witness Printer took 87.65 ms. Allocated memory is still 144.7 MB. Free memory was 109.1 MB in the beginning and 103.9 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-28 09:26:47,801 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 83.9 MB. Free memory is still 61.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 475.55 ms. Allocated memory was 83.9 MB in the beginning and 119.5 MB in the end (delta: 35.7 MB). Free memory was 43.5 MB in the beginning and 87.7 MB in the end (delta: -44.1 MB). Peak memory consumption was 8.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.12 ms. Allocated memory is still 119.5 MB. Free memory was 87.7 MB in the beginning and 85.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.99 ms. Allocated memory is still 119.5 MB. Free memory was 85.6 MB in the beginning and 83.5 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 463.46 ms. Allocated memory is still 119.5 MB. Free memory was 83.5 MB in the beginning and 70.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10996.83 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 70.0 MB in the beginning and 109.1 MB in the end (delta: -39.1 MB). Peak memory consumption was 60.2 MB. Max. memory is 16.1 GB. * Witness Printer took 87.65 ms. Allocated memory is still 144.7 MB. Free memory was 109.1 MB in the beginning and 103.9 MB in the end (delta: 5.2 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 616]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L599] const int len = 5; [L579] DLL head = ((void *)0); [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND FALSE !(\read(head)) [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND TRUE len > 0 [L581] DLL new_head = (DLL) malloc(sizeof(struct node)); [L582] COND FALSE !(((void *)0) == new_head) [L585] new_head->data_0 = 0 [L586] new_head->data_1 = 0 [L587] EXPR __VERIFIER_nondet_int() == len? 1 : 0 [L587] new_head->data_2 = __VERIFIER_nondet_int() == len? 1 : 0 [L588] new_head->next = head [L589] new_head->prev = ((void *)0) [L590] COND TRUE \read(head) [L591] head->prev = new_head [L593] head = new_head [L594] len-- [L580] COND FALSE !(len > 0) [L596] return head; [L600] DLL head = dll_create(len); [L601] head->next [L601] COND TRUE head->next [L602] EXPR head->data_0 [L602] EXPR 0 != head->data_0 || 0 != head->data_1 [L602] EXPR head->data_1 [L602] EXPR 0 != head->data_0 || 0 != head->data_1 [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L602] EXPR head->data_2 [L602] 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L602] COND TRUE 0 != head->data_0 || 0 != head->data_1 || 0 != head->data_2 [L616] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 29 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 10.8s, OverallIterations: 10, TraceHistogramMax: 5, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 239 SDtfs, 981 SDslu, 503 SDs, 0 SdLazy, 628 SolverSat, 203 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 253 GetRequests, 175 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=58occurred in iteration=9, InterpolantAutomatonStates: 60, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 9 MinimizatonAttempts, 93 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 3.6s SatisfiabilityAnalysisTime, 2.5s InterpolantComputationTime, 439 NumberOfCodeBlocks, 432 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 378 ConstructedInterpolants, 0 QuantifiedInterpolants, 1306 SizeOfPredicates, 33 NumberOfNonLiveVariables, 809 ConjunctsInSsa, 67 ConjunctsInUnsatCore, 14 InterpolantComputations, 4 PerfectInterpolantSequences, 159/312 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-28 09:26:47,867 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ce23678b-da66-46bf-82b1-6d693646d335/bin/uautomizer-UnR33cPsHg/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...