./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/list-properties/list_search-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/config/AutomizerReach.xml -i ../../sv-benchmarks/c/list-properties/list_search-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN --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 ef935aaf7590747bfbe771bbb249e6b84337edbf0e97024d9de82d0d23d44f30 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-6b4ec56 [2022-11-20 10:57:10,181 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 10:57:10,183 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 10:57:10,225 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 10:57:10,226 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 10:57:10,230 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 10:57:10,233 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 10:57:10,237 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 10:57:10,239 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 10:57:10,245 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 10:57:10,246 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 10:57:10,247 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 10:57:10,247 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 10:57:10,248 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 10:57:10,249 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 10:57:10,250 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 10:57:10,251 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 10:57:10,252 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 10:57:10,254 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 10:57:10,266 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 10:57:10,269 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 10:57:10,272 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 10:57:10,275 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 10:57:10,276 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 10:57:10,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 10:57:10,288 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 10:57:10,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 10:57:10,290 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 10:57:10,291 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 10:57:10,292 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 10:57:10,292 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 10:57:10,293 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 10:57:10,295 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 10:57:10,296 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 10:57:10,297 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 10:57:10,298 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 10:57:10,298 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 10:57:10,299 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 10:57:10,299 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 10:57:10,301 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 10:57:10,301 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 10:57:10,304 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-20 10:57:10,358 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 10:57:10,358 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 10:57:10,359 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 10:57:10,359 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 10:57:10,360 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 10:57:10,361 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 10:57:10,362 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-20 10:57:10,362 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-20 10:57:10,362 INFO L138 SettingsManager]: * Use SBE=true [2022-11-20 10:57:10,362 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 10:57:10,363 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 10:57:10,364 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 10:57:10,364 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 10:57:10,364 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 10:57:10,364 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 10:57:10,365 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 10:57:10,365 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 10:57:10,365 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 10:57:10,365 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 10:57:10,365 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 10:57:10,366 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 10:57:10,366 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 10:57:10,366 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-20 10:57:10,366 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 10:57:10,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:57:10,367 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 10:57:10,367 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 10:57:10,367 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 10:57:10,368 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-20 10:57:10,368 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 10:57:10,368 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-20 10:57:10,369 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-20 10:57:10,369 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 10:57:10,369 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_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ef935aaf7590747bfbe771bbb249e6b84337edbf0e97024d9de82d0d23d44f30 [2022-11-20 10:57:10,657 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 10:57:10,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 10:57:10,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 10:57:10,699 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 10:57:10,700 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 10:57:10,701 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/../../sv-benchmarks/c/list-properties/list_search-1.i [2022-11-20 10:57:13,806 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 10:57:14,065 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 10:57:14,068 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/sv-benchmarks/c/list-properties/list_search-1.i [2022-11-20 10:57:14,087 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/data/a38af70ec/db1a694cb11d4567b4cfdcdc205fd742/FLAGf57364f29 [2022-11-20 10:57:14,108 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/data/a38af70ec/db1a694cb11d4567b4cfdcdc205fd742 [2022-11-20 10:57:14,112 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 10:57:14,114 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 10:57:14,118 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 10:57:14,119 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 10:57:14,123 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 10:57:14,124 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:57:14" (1/1) ... [2022-11-20 10:57:14,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7bcb6556 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:14, skipping insertion in model container [2022-11-20 10:57:14,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 10:57:14" (1/1) ... [2022-11-20 10:57:14,146 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 10:57:14,205 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 10:57:14,386 WARN L237 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_e97697c1-1abe-4ea0-bb6f-7f40367fb434/sv-benchmarks/c/list-properties/list_search-1.i[813,826] [2022-11-20 10:57:14,539 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:57:14,555 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 10:57:14,574 WARN L237 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_e97697c1-1abe-4ea0-bb6f-7f40367fb434/sv-benchmarks/c/list-properties/list_search-1.i[813,826] [2022-11-20 10:57:14,630 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 10:57:14,666 INFO L208 MainTranslator]: Completed translation [2022-11-20 10:57:14,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:14 WrapperNode [2022-11-20 10:57:14,667 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 10:57:14,668 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 10:57:14,669 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 10:57:14,669 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 10:57:14,678 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:14" (1/1) ... [2022-11-20 10:57:14,699 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:14" (1/1) ... [2022-11-20 10:57:14,722 INFO L138 Inliner]: procedures = 125, calls = 22, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 66 [2022-11-20 10:57:14,723 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 10:57:14,724 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 10:57:14,724 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 10:57:14,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 10:57:14,734 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:14" (1/1) ... [2022-11-20 10:57:14,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:14" (1/1) ... [2022-11-20 10:57:14,738 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:14" (1/1) ... [2022-11-20 10:57:14,741 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:14" (1/1) ... [2022-11-20 10:57:14,747 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:14" (1/1) ... [2022-11-20 10:57:14,762 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:14" (1/1) ... [2022-11-20 10:57:14,766 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:14" (1/1) ... [2022-11-20 10:57:14,775 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:14" (1/1) ... [2022-11-20 10:57:14,777 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 10:57:14,778 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 10:57:14,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 10:57:14,789 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 10:57:14,790 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:14" (1/1) ... [2022-11-20 10:57:14,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 10:57:14,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:57:14,832 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 10:57:14,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 10:57:14,872 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 10:57:14,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 10:57:14,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-20 10:57:14,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 10:57:14,873 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-20 10:57:14,873 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-20 10:57:14,874 INFO L130 BoogieDeclarations]: Found specification of procedure insert_list [2022-11-20 10:57:14,874 INFO L138 BoogieDeclarations]: Found implementation of procedure insert_list [2022-11-20 10:57:14,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 10:57:14,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 10:57:14,874 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 10:57:14,875 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 10:57:15,048 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 10:57:15,050 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 10:57:15,289 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 10:57:15,295 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 10:57:15,296 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-20 10:57:15,298 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:57:15 BoogieIcfgContainer [2022-11-20 10:57:15,298 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 10:57:15,301 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 10:57:15,301 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 10:57:15,305 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 10:57:15,305 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 10:57:14" (1/3) ... [2022-11-20 10:57:15,306 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b98379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:57:15, skipping insertion in model container [2022-11-20 10:57:15,306 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 10:57:14" (2/3) ... [2022-11-20 10:57:15,307 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b98379 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 10:57:15, skipping insertion in model container [2022-11-20 10:57:15,307 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:57:15" (3/3) ... [2022-11-20 10:57:15,308 INFO L112 eAbstractionObserver]: Analyzing ICFG list_search-1.i [2022-11-20 10:57:15,327 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 10:57:15,327 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 10:57:15,394 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 10:57:15,402 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@40e2ae0d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 10:57:15,402 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-20 10:57:15,406 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 10:57:15,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-20 10:57:15,415 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:15,415 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:15,416 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:57:15,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:15,422 INFO L85 PathProgramCache]: Analyzing trace with hash -547062782, now seen corresponding path program 1 times [2022-11-20 10:57:15,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:57:15,432 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749058397] [2022-11-20 10:57:15,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:57:15,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:57:15,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:15,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:57:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:16,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 10:57:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:16,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 10:57:16,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:16,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:57:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:16,250 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 10:57:16,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:57:16,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749058397] [2022-11-20 10:57:16,252 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749058397] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:57:16,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278240846] [2022-11-20 10:57:16,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:57:16,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:57:16,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:57:16,256 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:57:16,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 10:57:16,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:16,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-20 10:57:16,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-20 10:57:16,507 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-20 10:57:16,508 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278240846] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:57:16,508 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-20 10:57:16,508 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [7] total 7 [2022-11-20 10:57:16,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428135103] [2022-11-20 10:57:16,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:57:16,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-20 10:57:16,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:57:16,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-20 10:57:16,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:57:16,581 INFO L87 Difference]: Start difference. First operand has 28 states, 21 states have (on average 1.380952380952381) internal successors, (29), 22 states have internal predecessors, (29), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 10:57:16,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:16,613 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2022-11-20 10:57:16,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-20 10:57:16,615 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 35 [2022-11-20 10:57:16,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:16,626 INFO L225 Difference]: With dead ends: 38 [2022-11-20 10:57:16,626 INFO L226 Difference]: Without dead ends: 23 [2022-11-20 10:57:16,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:57:16,636 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:16,639 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-20 10:57:16,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-20 10:57:16,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-20 10:57:16,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 4 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-20 10:57:16,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-11-20 10:57:16,683 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 35 [2022-11-20 10:57:16,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:16,685 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-11-20 10:57:16,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 10:57:16,685 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-11-20 10:57:16,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 10:57:16,689 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:16,689 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:16,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-20 10:57:16,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-20 10:57:16,896 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:57:16,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:16,897 INFO L85 PathProgramCache]: Analyzing trace with hash -745059685, now seen corresponding path program 1 times [2022-11-20 10:57:16,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:57:16,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889085820] [2022-11-20 10:57:16,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:57:16,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:57:16,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:17,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:57:17,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:17,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 10:57:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:17,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 10:57:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:17,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:57:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:17,394 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 10:57:17,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:57:17,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889085820] [2022-11-20 10:57:17,401 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889085820] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:57:17,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999249520] [2022-11-20 10:57:17,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:57:17,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:57:17,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:57:17,411 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:57:17,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 10:57:17,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:17,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-20 10:57:17,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:17,713 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-20 10:57:17,717 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:57:17,851 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 1 proven. 22 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:57:17,851 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999249520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 10:57:17,851 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 10:57:17,851 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 8 [2022-11-20 10:57:17,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795410703] [2022-11-20 10:57:17,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 10:57:17,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-20 10:57:17,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:57:17,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-20 10:57:17,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2022-11-20 10:57:17,854 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-20 10:57:18,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:18,010 INFO L93 Difference]: Finished difference Result 47 states and 59 transitions. [2022-11-20 10:57:18,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-20 10:57:18,012 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2022-11-20 10:57:18,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:18,014 INFO L225 Difference]: With dead ends: 47 [2022-11-20 10:57:18,014 INFO L226 Difference]: Without dead ends: 29 [2022-11-20 10:57:18,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:57:18,018 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 27 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:18,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 79 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:57:18,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-20 10:57:18,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-11-20 10:57:18,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-20 10:57:18,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-11-20 10:57:18,036 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 37 [2022-11-20 10:57:18,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:18,036 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-11-20 10:57:18,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (6), 2 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-20 10:57:18,037 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-11-20 10:57:18,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 10:57:18,038 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:18,038 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:18,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 10:57:18,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:57:18,245 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:57:18,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:18,246 INFO L85 PathProgramCache]: Analyzing trace with hash -2113798375, now seen corresponding path program 1 times [2022-11-20 10:57:18,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:57:18,246 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175607117] [2022-11-20 10:57:18,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:57:18,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:57:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:18,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:57:18,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:18,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 10:57:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:18,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 10:57:18,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:18,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:57:18,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:18,861 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 10:57:18,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:57:18,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175607117] [2022-11-20 10:57:18,861 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175607117] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:57:18,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:57:18,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-11-20 10:57:18,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903735614] [2022-11-20 10:57:18,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:57:18,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-20 10:57:18,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:57:18,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-20 10:57:18,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-11-20 10:57:18,872 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 10:57:19,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:19,072 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2022-11-20 10:57:19,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:57:19,073 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2022-11-20 10:57:19,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:19,074 INFO L225 Difference]: With dead ends: 43 [2022-11-20 10:57:19,074 INFO L226 Difference]: Without dead ends: 38 [2022-11-20 10:57:19,075 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-20 10:57:19,076 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 37 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:19,076 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 76 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:57:19,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-20 10:57:19,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2022-11-20 10:57:19,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-20 10:57:19,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-11-20 10:57:19,083 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 37 [2022-11-20 10:57:19,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:19,084 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-11-20 10:57:19,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 7 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 10:57:19,084 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-11-20 10:57:19,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-11-20 10:57:19,085 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:19,086 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:19,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 10:57:19,086 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:57:19,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:19,087 INFO L85 PathProgramCache]: Analyzing trace with hash -2056540073, now seen corresponding path program 1 times [2022-11-20 10:57:19,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:57:19,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869049682] [2022-11-20 10:57:19,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:57:19,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:57:19,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:19,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:57:19,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:19,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 10:57:19,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:19,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 10:57:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:19,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:57:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:19,382 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-20 10:57:19,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:57:19,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869049682] [2022-11-20 10:57:19,384 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869049682] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 10:57:19,386 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 10:57:19,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-20 10:57:19,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245524839] [2022-11-20 10:57:19,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 10:57:19,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 10:57:19,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:57:19,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 10:57:19,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-20 10:57:19,396 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 10:57:19,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:19,554 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2022-11-20 10:57:19,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-20 10:57:19,555 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 37 [2022-11-20 10:57:19,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:19,560 INFO L225 Difference]: With dead ends: 40 [2022-11-20 10:57:19,560 INFO L226 Difference]: Without dead ends: 32 [2022-11-20 10:57:19,560 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2022-11-20 10:57:19,563 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:19,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 88 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 10:57:19,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-20 10:57:19,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-11-20 10:57:19,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.125) internal successors, (27), 24 states have internal predecessors, (27), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-20 10:57:19,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2022-11-20 10:57:19,583 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 37 [2022-11-20 10:57:19,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:19,583 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2022-11-20 10:57:19,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-20 10:57:19,584 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2022-11-20 10:57:19,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-20 10:57:19,586 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:19,586 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:19,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 10:57:19,586 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:57:19,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:19,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1005030197, now seen corresponding path program 1 times [2022-11-20 10:57:19,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:57:19,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581451048] [2022-11-20 10:57:19,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:57:19,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:57:19,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:20,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:57:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:20,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 10:57:20,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:20,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 10:57:20,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:20,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:57:20,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:21,164 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-20 10:57:21,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:57:21,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581451048] [2022-11-20 10:57:21,164 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581451048] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:57:21,165 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604542075] [2022-11-20 10:57:21,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:57:21,165 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:57:21,165 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:57:21,166 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:57:21,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-20 10:57:21,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:21,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 75 conjunts are in the unsatisfiable core [2022-11-20 10:57:21,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:21,397 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 10:57:21,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:57:21,412 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 10:57:21,588 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-20 10:57:21,600 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-20 10:57:21,753 INFO L321 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2022-11-20 10:57:21,753 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2022-11-20 10:57:21,776 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-20 10:57:21,777 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 15 [2022-11-20 10:57:21,899 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 15 [2022-11-20 10:57:21,904 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 10:57:21,990 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 19 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-20 10:57:21,990 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:57:22,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604542075] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:57:22,328 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:57:22,328 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 21 [2022-11-20 10:57:22,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762964097] [2022-11-20 10:57:22,328 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:57:22,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-20 10:57:22,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:57:22,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-20 10:57:22,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=587, Unknown=2, NotChecked=0, Total=650 [2022-11-20 10:57:22,330 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 10:57:23,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:23,292 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2022-11-20 10:57:23,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-20 10:57:23,294 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 40 [2022-11-20 10:57:23,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:23,295 INFO L225 Difference]: With dead ends: 48 [2022-11-20 10:57:23,295 INFO L226 Difference]: Without dead ends: 40 [2022-11-20 10:57:23,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=166, Invalid=1238, Unknown=2, NotChecked=0, Total=1406 [2022-11-20 10:57:23,297 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 61 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 324 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:23,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 167 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 324 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-20 10:57:23,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-20 10:57:23,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2022-11-20 10:57:23,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-20 10:57:23,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2022-11-20 10:57:23,305 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 40 [2022-11-20 10:57:23,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:23,306 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2022-11-20 10:57:23,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-20 10:57:23,309 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2022-11-20 10:57:23,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 10:57:23,311 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:23,311 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:23,323 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-20 10:57:23,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:57:23,518 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:57:23,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:23,518 INFO L85 PathProgramCache]: Analyzing trace with hash 2009254361, now seen corresponding path program 2 times [2022-11-20 10:57:23,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:57:23,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032822745] [2022-11-20 10:57:23,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:57:23,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:57:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:25,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:57:25,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:25,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 10:57:25,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:25,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 10:57:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:25,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:57:25,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:26,286 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:57:26,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:57:26,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032822745] [2022-11-20 10:57:26,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032822745] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:57:26,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615674517] [2022-11-20 10:57:26,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-20 10:57:26,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:57:26,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:57:26,291 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:57:26,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-20 10:57:26,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-20 10:57:26,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-20 10:57:26,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 110 conjunts are in the unsatisfiable core [2022-11-20 10:57:26,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:26,537 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 10:57:26,588 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:57:26,590 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 10:57:26,972 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-20 10:57:26,979 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-20 10:57:27,194 INFO L321 Elim1Store]: treesize reduction 36, result has 37.9 percent of original size [2022-11-20 10:57:27,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 2 case distinctions, treesize of input 23 treesize of output 33 [2022-11-20 10:57:27,216 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 22 [2022-11-20 10:57:27,471 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 10:57:27,488 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 10:57:27,709 INFO L321 Elim1Store]: treesize reduction 21, result has 44.7 percent of original size [2022-11-20 10:57:27,710 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 20 treesize of output 23 [2022-11-20 10:57:27,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:57:27,751 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 36 [2022-11-20 10:57:27,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-20 10:57:27,766 INFO L321 Elim1Store]: treesize reduction 4, result has 75.0 percent of original size [2022-11-20 10:57:27,767 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 22 [2022-11-20 10:57:27,777 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 19 [2022-11-20 10:57:28,163 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-20 10:57:28,174 INFO L321 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2022-11-20 10:57:28,175 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 89 treesize of output 49 [2022-11-20 10:57:28,195 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-20 10:57:28,196 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 18 [2022-11-20 10:57:28,276 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:57:28,277 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 10 [2022-11-20 10:57:28,347 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:57:28,347 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:57:28,861 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:57:28,861 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 38 [2022-11-20 10:57:28,872 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:57:28,872 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 35 [2022-11-20 10:57:28,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615674517] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:57:28,986 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:57:28,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 36 [2022-11-20 10:57:28,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136251516] [2022-11-20 10:57:28,986 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:57:28,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-20 10:57:28,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:57:28,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-20 10:57:28,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1534, Unknown=0, NotChecked=0, Total=1640 [2022-11-20 10:57:28,989 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 31 states have internal predecessors, (59), 5 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-20 10:57:30,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:30,534 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2022-11-20 10:57:30,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-20 10:57:30,536 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 31 states have internal predecessors, (59), 5 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) Word has length 43 [2022-11-20 10:57:30,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:30,537 INFO L225 Difference]: With dead ends: 55 [2022-11-20 10:57:30,537 INFO L226 Difference]: Without dead ends: 50 [2022-11-20 10:57:30,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=242, Invalid=2620, Unknown=0, NotChecked=0, Total=2862 [2022-11-20 10:57:30,539 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 44 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 381 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 341 SdHoareTripleChecker+Invalid, 485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 381 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 84 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:30,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 341 Invalid, 485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 381 Invalid, 0 Unknown, 84 Unchecked, 0.4s Time] [2022-11-20 10:57:30,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-20 10:57:30,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2022-11-20 10:57:30,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2022-11-20 10:57:30,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2022-11-20 10:57:30,557 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 43 [2022-11-20 10:57:30,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:30,558 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2022-11-20 10:57:30,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 31 states have internal predecessors, (59), 5 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 5 states have call successors, (7) [2022-11-20 10:57:30,558 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2022-11-20 10:57:30,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-20 10:57:30,562 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:30,563 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:30,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-20 10:57:30,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:57:30,770 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:57:30,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:30,771 INFO L85 PathProgramCache]: Analyzing trace with hash 2066512663, now seen corresponding path program 1 times [2022-11-20 10:57:30,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:57:30,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180823911] [2022-11-20 10:57:30,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:57:30,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:57:30,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:31,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2022-11-20 10:57:31,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:31,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2022-11-20 10:57:31,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:31,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-20 10:57:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:32,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-20 10:57:32,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:32,285 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 22 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-20 10:57:32,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-20 10:57:32,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180823911] [2022-11-20 10:57:32,286 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180823911] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:57:32,286 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885333134] [2022-11-20 10:57:32,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:57:32,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:57:32,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 [2022-11-20 10:57:32,288 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 10:57:32,322 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-20 10:57:32,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 10:57:32,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 64 conjunts are in the unsatisfiable core [2022-11-20 10:57:32,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 10:57:32,630 INFO L350 Elim1Store]: Elim1 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 [2022-11-20 10:57:32,667 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-20 10:57:32,857 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2022-11-20 10:57:32,867 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 14 [2022-11-20 10:57:32,994 INFO L321 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2022-11-20 10:57:32,994 INFO L350 Elim1Store]: Elim1 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 15 treesize of output 15 [2022-11-20 10:57:33,004 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2022-11-20 10:57:33,116 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-20 10:57:33,192 INFO L321 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2022-11-20 10:57:33,193 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 15 [2022-11-20 10:57:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-20 10:57:33,200 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 10:57:33,411 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-20 10:57:33,411 INFO L350 Elim1Store]: Elim1 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 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 20 [2022-11-20 10:57:33,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885333134] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 10:57:33,467 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-20 10:57:33,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 28 [2022-11-20 10:57:33,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585597596] [2022-11-20 10:57:33,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-20 10:57:33,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-11-20 10:57:33,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-20 10:57:33,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-11-20 10:57:33,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=899, Unknown=2, NotChecked=0, Total=992 [2022-11-20 10:57:33,469 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 23 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-20 10:57:35,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 10:57:35,139 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2022-11-20 10:57:35,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-11-20 10:57:35,140 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 23 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) Word has length 43 [2022-11-20 10:57:35,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 10:57:35,141 INFO L225 Difference]: With dead ends: 66 [2022-11-20 10:57:35,141 INFO L226 Difference]: Without dead ends: 54 [2022-11-20 10:57:35,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=418, Invalid=2442, Unknown=2, NotChecked=0, Total=2862 [2022-11-20 10:57:35,143 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 53 mSDsluCounter, 271 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 6 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-20 10:57:35,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 291 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 433 Invalid, 0 Unknown, 6 Unchecked, 0.5s Time] [2022-11-20 10:57:35,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-11-20 10:57:35,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 49. [2022-11-20 10:57:35,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (6), 5 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-20 10:57:35,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-11-20 10:57:35,168 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 43 [2022-11-20 10:57:35,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 10:57:35,169 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-11-20 10:57:35,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9642857142857142) internal successors, (55), 23 states have internal predecessors, (55), 4 states have call successors, (8), 4 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 4 states have call successors, (7) [2022-11-20 10:57:35,169 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-11-20 10:57:35,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-20 10:57:35,171 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 10:57:35,172 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 10:57:35,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-20 10:57:35,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 10:57:35,380 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 10:57:35,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 10:57:35,381 INFO L85 PathProgramCache]: Analyzing trace with hash 1384296971, now seen corresponding path program 3 times [2022-11-20 10:57:35,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-20 10:57:35,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754256782] [2022-11-20 10:57:35,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 10:57:35,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 10:57:35,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:57:35,426 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 10:57:35,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 10:57:35,500 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-20 10:57:35,500 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 10:57:35,501 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-11-20 10:57:35,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 10:57:35,507 INFO L444 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1] [2022-11-20 10:57:35,514 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-20 10:57:35,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 10:57:35 BoogieIcfgContainer [2022-11-20 10:57:35,588 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-20 10:57:35,589 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-20 10:57:35,589 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-20 10:57:35,589 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-20 10:57:35,590 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 10:57:15" (3/4) ... [2022-11-20 10:57:35,592 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-20 10:57:35,665 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/witness.graphml [2022-11-20 10:57:35,669 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-20 10:57:35,669 INFO L158 Benchmark]: Toolchain (without parser) took 21555.45ms. Allocated memory was 180.4MB in the beginning and 377.5MB in the end (delta: 197.1MB). Free memory was 135.6MB in the beginning and 295.8MB in the end (delta: -160.1MB). Peak memory consumption was 39.5MB. Max. memory is 16.1GB. [2022-11-20 10:57:35,670 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 134.2MB. Free memory is still 77.5MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-20 10:57:35,670 INFO L158 Benchmark]: CACSL2BoogieTranslator took 549.24ms. Allocated memory is still 180.4MB. Free memory was 135.1MB in the beginning and 118.4MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-20 10:57:35,671 INFO L158 Benchmark]: Boogie Procedure Inliner took 54.83ms. Allocated memory is still 180.4MB. Free memory was 118.4MB in the beginning and 116.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 10:57:35,671 INFO L158 Benchmark]: Boogie Preprocessor took 53.71ms. Allocated memory is still 180.4MB. Free memory was 116.8MB in the beginning and 115.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-20 10:57:35,671 INFO L158 Benchmark]: RCFGBuilder took 520.19ms. Allocated memory is still 180.4MB. Free memory was 115.2MB in the beginning and 102.1MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2022-11-20 10:57:35,672 INFO L158 Benchmark]: TraceAbstraction took 20287.57ms. Allocated memory was 180.4MB in the beginning and 377.5MB in the end (delta: 197.1MB). Free memory was 101.5MB in the beginning and 298.9MB in the end (delta: -197.4MB). Peak memory consumption was 1.8MB. Max. memory is 16.1GB. [2022-11-20 10:57:35,672 INFO L158 Benchmark]: Witness Printer took 80.00ms. Allocated memory is still 377.5MB. Free memory was 298.9MB in the beginning and 295.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-20 10:57:35,674 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 134.2MB. Free memory is still 77.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 549.24ms. Allocated memory is still 180.4MB. Free memory was 135.1MB in the beginning and 118.4MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 54.83ms. Allocated memory is still 180.4MB. Free memory was 118.4MB in the beginning and 116.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 53.71ms. Allocated memory is still 180.4MB. Free memory was 116.8MB in the beginning and 115.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 520.19ms. Allocated memory is still 180.4MB. Free memory was 115.2MB in the beginning and 102.1MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 20287.57ms. Allocated memory was 180.4MB in the beginning and 377.5MB in the end (delta: 197.1MB). Free memory was 101.5MB in the beginning and 298.9MB in the end (delta: -197.4MB). Peak memory consumption was 1.8MB. Max. memory is 16.1GB. * Witness Printer took 80.00ms. Allocated memory is still 377.5MB. Free memory was 298.9MB in the beginning and 295.8MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 15]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L533] mlist *head; VAL [head={0:0}] [L554] int i; [L555] mlist *mylist, *temp; VAL [head={0:0}] [L556] CALL insert_list(mylist,2) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, l={55:64}] [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, k=2, l={55:64}, l={-1:0}] [L544] COND TRUE head==((void *)0) [L545] l->next = ((void *)0) VAL [\old(head)=0, \old(head)=0, \old(k)=2, head={0:0}, k=2, l={55:64}, l={-1:0}] [L550] head = l [L551] return 0; VAL [\old(head)=0, \old(head)=0, \old(k)=2, \result=0, head={-1:0}, k=2, l={-1:0}, l={55:64}] [L556] RET insert_list(mylist,2) VAL [head={-1:0}, insert_list(mylist,2)=0, mylist={55:64}] [L557] CALL insert_list(mylist,5) VAL [\old(head)=-1, \old(head)=0, \old(k)=5, head={-1:0}, l={55:64}] [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k VAL [\old(head)=0, \old(head)=-1, \old(k)=5, head={-1:0}, k=5, l={-5:0}, l={55:64}] [L544] COND FALSE !(head==((void *)0)) [L547] l->key = k [L548] l->next = head VAL [\old(head)=-1, \old(head)=0, \old(k)=5, head={-1:0}, k=5, l={55:64}, l={-5:0}] [L550] head = l [L551] return 0; VAL [\old(head)=0, \old(head)=-1, \old(k)=5, \result=0, head={-5:0}, k=5, l={55:64}, l={-5:0}] [L557] RET insert_list(mylist,5) VAL [head={-5:0}, insert_list(mylist,5)=0, mylist={55:64}] [L558] CALL insert_list(mylist,1) VAL [\old(head)=0, \old(head)=-5, \old(k)=1, head={-5:0}, l={55:64}] [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k VAL [\old(head)=-5, \old(head)=0, \old(k)=1, head={-5:0}, k=1, l={-3:0}, l={55:64}] [L544] COND FALSE !(head==((void *)0)) [L547] l->key = k [L548] l->next = head VAL [\old(head)=0, \old(head)=-5, \old(k)=1, head={-5:0}, k=1, l={-3:0}, l={55:64}] [L550] head = l [L551] return 0; VAL [\old(head)=-5, \old(head)=0, \old(k)=1, \result=0, head={-3:0}, k=1, l={55:64}, l={-3:0}] [L558] RET insert_list(mylist,1) VAL [head={-3:0}, insert_list(mylist,1)=0, mylist={55:64}] [L559] CALL insert_list(mylist,3) VAL [\old(head)=0, \old(head)=-3, \old(k)=3, head={-3:0}, l={55:64}] [L542] l = (mlist*)malloc(sizeof(mlist)) [L543] l->key = k VAL [\old(head)=0, \old(head)=-3, \old(k)=3, head={-3:0}, k=3, l={-4:0}, l={55:64}] [L544] COND FALSE !(head==((void *)0)) [L547] l->key = k [L548] l->next = head VAL [\old(head)=-3, \old(head)=0, \old(k)=3, head={-3:0}, k=3, l={55:64}, l={-4:0}] [L550] head = l [L551] return 0; VAL [\old(head)=0, \old(head)=-3, \old(k)=3, \result=0, head={-4:0}, k=3, l={55:64}, l={-4:0}] [L559] RET insert_list(mylist,3) VAL [head={-4:0}, insert_list(mylist,3)=0, mylist={55:64}] [L560] CALL, EXPR search_list(head,2) [L535] l = head VAL [\old(k)=2, head={-4:0}, k=2, l={-4:0}, l={-4:0}] [L536] l!=((void *)0) && l->key!=k [L536] EXPR l->key [L536] l!=((void *)0) && l->key!=k VAL [\old(k)=2, head={-4:0}, k=2, l={-4:0}, l={-4:0}, l!=((void *)0) && l->key!=k=1, l->key=3] [L536] COND TRUE l!=((void *)0) && l->key!=k [L537] EXPR l->next [L537] l = l->next [L536] l!=((void *)0) && l->key!=k [L536] EXPR l->key [L536] l!=((void *)0) && l->key!=k VAL [\old(k)=2, head={-4:0}, k=2, l={-4:0}, l={-3:0}, l!=((void *)0) && l->key!=k=1, l->key=1] [L536] COND TRUE l!=((void *)0) && l->key!=k [L537] EXPR l->next [L537] l = l->next [L536] l!=((void *)0) && l->key!=k [L536] EXPR l->key [L536] l!=((void *)0) && l->key!=k VAL [\old(k)=2, head={-4:0}, k=2, l={-4:0}, l={-5:0}, l!=((void *)0) && l->key!=k=1, l->key=5] [L536] COND TRUE l!=((void *)0) && l->key!=k [L537] EXPR l->next [L537] l = l->next [L536] l!=((void *)0) && l->key!=k [L536] EXPR l->key [L536] l!=((void *)0) && l->key!=k VAL [\old(k)=2, head={-4:0}, k=2, l={-4:0}, l={-1:0}, l!=((void *)0) && l->key!=k=0, l->key=2] [L536] COND FALSE !(l!=((void *)0) && l->key!=k) [L539] return l; VAL [\old(k)=2, \result={-1:0}, head={-4:0}, k=2, l={-1:0}, l={-4:0}] [L560] RET, EXPR search_list(head,2) [L560] temp = search_list(head,2) [L561] EXPR temp->key [L561] CALL __VERIFIER_assert(temp->key==1) [L14] COND TRUE !(cond) VAL [\old(cond)=0, cond=0, head={-4:0}] [L15] reach_error() VAL [\old(cond)=0, cond=0, head={-4:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 28 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 20.1s, OverallIterations: 8, TraceHistogramMax: 4, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 4.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 248 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 248 mSDsluCounter, 1076 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 90 IncrementalHoareTripleChecker+Unchecked, 932 mSDsCounter, 108 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1356 IncrementalHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 108 mSolverCounterUnsat, 144 mSDtfsCounter, 1356 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 465 GetRequests, 272 SyntacticMatches, 15 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 6.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49occurred in iteration=7, InterpolantAutomatonStates: 94, 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, 7 MinimizatonAttempts, 23 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 12.2s InterpolantComputationTime, 516 NumberOfCodeBlocks, 516 NumberOfCodeBlocksAsserted, 14 NumberOfCheckSat, 494 ConstructedInterpolants, 10 QuantifiedInterpolants, 4947 SizeOfPredicates, 50 NumberOfNonLiveVariables, 1950 ConjunctsInSsa, 259 ConjunctsInUnsatCore, 13 InterpolantComputations, 3 PerfectInterpolantSequences, 280/432 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! [2022-11-20 10:57:35,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e97697c1-1abe-4ea0-bb6f-7f40367fb434/bin/uautomizer-ug76WZFUDN/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE