./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/max.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/max.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc --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 97795e7b99ddd869ecccb7f865206a167342b52333873684a94abd35acf6650e --- 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-5e519f3 [2022-11-02 20:12:54,276 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:12:54,278 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:12:54,317 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:12:54,317 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:12:54,321 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:12:54,323 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:12:54,328 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:12:54,330 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:12:54,335 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:12:54,336 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:12:54,338 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:12:54,338 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:12:54,341 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:12:54,342 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:12:54,344 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:12:54,345 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:12:54,346 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:12:54,347 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:12:54,354 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:12:54,355 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:12:54,357 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:12:54,360 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:12:54,360 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:12:54,368 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:12:54,369 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:12:54,369 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:12:54,371 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:12:54,371 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:12:54,372 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:12:54,373 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:12:54,374 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:12:54,376 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:12:54,377 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:12:54,378 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:12:54,379 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:12:54,379 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:12:54,379 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:12:54,380 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:12:54,381 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:12:54,382 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:12:54,384 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:12:54,418 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:12:54,419 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:12:54,419 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:12:54,419 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:12:54,420 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:12:54,424 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:12:54,425 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:12:54,425 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:12:54,425 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:12:54,426 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:12:54,427 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:12:54,427 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:12:54,427 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:12:54,427 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:12:54,427 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:12:54,428 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:12:54,428 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:12:54,428 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:12:54,428 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:12:54,428 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:12:54,428 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:12:54,429 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:12:54,429 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:12:54,429 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:12:54,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:12:54,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:12:54,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:12:54,430 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:12:54,430 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:12:54,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:12:54,431 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:12:54,431 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:12:54,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:12:54,431 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_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 97795e7b99ddd869ecccb7f865206a167342b52333873684a94abd35acf6650e [2022-11-02 20:12:54,702 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:12:54,730 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:12:54,733 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:12:54,735 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:12:54,735 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:12:54,737 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/reducercommutativity/max.i [2022-11-02 20:12:54,811 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/data/aa8bf698b/a8ad785d720440e98c4f6b5fbdfbca4d/FLAG7ed32030b [2022-11-02 20:12:55,302 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:12:55,302 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/sv-benchmarks/c/reducercommutativity/max.i [2022-11-02 20:12:55,308 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/data/aa8bf698b/a8ad785d720440e98c4f6b5fbdfbca4d/FLAG7ed32030b [2022-11-02 20:12:55,698 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/data/aa8bf698b/a8ad785d720440e98c4f6b5fbdfbca4d [2022-11-02 20:12:55,703 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:12:55,705 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:12:55,711 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:12:55,711 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:12:55,715 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:12:55,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:12:55" (1/1) ... [2022-11-02 20:12:55,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3209a494 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:55, skipping insertion in model container [2022-11-02 20:12:55,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:12:55" (1/1) ... [2022-11-02 20:12:55,724 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:12:55,742 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:12:55,941 WARN L230 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_264af27e-eb97-4c01-b855-c7778702805c/sv-benchmarks/c/reducercommutativity/max.i[1295,1308] [2022-11-02 20:12:55,944 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:12:55,950 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:12:55,968 WARN L230 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_264af27e-eb97-4c01-b855-c7778702805c/sv-benchmarks/c/reducercommutativity/max.i[1295,1308] [2022-11-02 20:12:55,969 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:12:55,982 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:12:55,983 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:55 WrapperNode [2022-11-02 20:12:55,983 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:12:55,983 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:12:55,983 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:12:55,984 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:12:55,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:55" (1/1) ... [2022-11-02 20:12:55,996 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:55" (1/1) ... [2022-11-02 20:12:56,014 INFO L138 Inliner]: procedures = 16, calls = 27, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 65 [2022-11-02 20:12:56,015 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:12:56,015 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:12:56,016 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:12:56,016 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:12:56,024 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:55" (1/1) ... [2022-11-02 20:12:56,024 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:55" (1/1) ... [2022-11-02 20:12:56,027 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:55" (1/1) ... [2022-11-02 20:12:56,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:55" (1/1) ... [2022-11-02 20:12:56,033 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:55" (1/1) ... [2022-11-02 20:12:56,036 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:55" (1/1) ... [2022-11-02 20:12:56,038 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:55" (1/1) ... [2022-11-02 20:12:56,039 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:55" (1/1) ... [2022-11-02 20:12:56,040 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:12:56,041 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:12:56,042 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:12:56,042 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:12:56,043 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:55" (1/1) ... [2022-11-02 20:12:56,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:12:56,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:12:56,083 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:12:56,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:12:56,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:12:56,127 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-11-02 20:12:56,127 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-11-02 20:12:56,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:12:56,128 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 20:12:56,128 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 20:12:56,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:12:56,128 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:12:56,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 20:12:56,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 20:12:56,195 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:12:56,197 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:12:56,342 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:12:56,348 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:12:56,348 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:12:56,350 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:12:56 BoogieIcfgContainer [2022-11-02 20:12:56,351 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:12:56,353 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:12:56,353 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:12:56,356 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:12:56,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:12:55" (1/3) ... [2022-11-02 20:12:56,357 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e250034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:12:56, skipping insertion in model container [2022-11-02 20:12:56,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:12:55" (2/3) ... [2022-11-02 20:12:56,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e250034 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:12:56, skipping insertion in model container [2022-11-02 20:12:56,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:12:56" (3/3) ... [2022-11-02 20:12:56,359 INFO L112 eAbstractionObserver]: Analyzing ICFG max.i [2022-11-02 20:12:56,378 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:12:56,378 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:12:56,427 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:12:56,434 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;@4a719520, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:12:56,434 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:12:56,438 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:12:56,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:12:56,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:12:56,448 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:12:56,448 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:12:56,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:56,453 INFO L85 PathProgramCache]: Analyzing trace with hash -344723103, now seen corresponding path program 1 times [2022-11-02 20:12:56,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:56,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708575054] [2022-11-02 20:12:56,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:56,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:56,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:12:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:56,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-02 20:12:56,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:56,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:12:56,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:56,688 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 20:12:56,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:56,694 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708575054] [2022-11-02 20:12:56,695 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708575054] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:12:56,695 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:12:56,695 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:12:56,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458913356] [2022-11-02 20:12:56,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:12:56,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:12:56,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:56,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:12:56,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:12:56,740 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 23 states have internal predecessors, (30), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:12:56,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:12:56,758 INFO L93 Difference]: Finished difference Result 52 states and 69 transitions. [2022-11-02 20:12:56,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:12:56,760 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-11-02 20:12:56,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:12:56,767 INFO L225 Difference]: With dead ends: 52 [2022-11-02 20:12:56,767 INFO L226 Difference]: Without dead ends: 23 [2022-11-02 20:12:56,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:12:56,773 INFO L413 NwaCegarLoop]: 33 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, 33 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 [2022-11-02 20:12:56,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:12:56,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-02 20:12:56,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-02 20:12:56,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 18 states have internal predecessors, (21), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:12:56,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-11-02 20:12:56,808 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 28 [2022-11-02 20:12:56,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:12:56,808 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-11-02 20:12:56,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 7.0) internal successors, (14), 2 states have internal predecessors, (14), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:12:56,809 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-11-02 20:12:56,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:12:56,810 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:12:56,810 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:12:56,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 20:12:56,811 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:12:56,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:56,812 INFO L85 PathProgramCache]: Analyzing trace with hash 47571572, now seen corresponding path program 1 times [2022-11-02 20:12:56,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:56,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168598188] [2022-11-02 20:12:56,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:56,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:56,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:57,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:12:57,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:57,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-02 20:12:57,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:57,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 20:12:57,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:57,088 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:12:57,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:57,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168598188] [2022-11-02 20:12:57,089 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168598188] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:12:57,089 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375521718] [2022-11-02 20:12:57,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:57,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:57,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:12:57,109 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:12:57,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:12:57,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:57,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:12:57,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:12:57,330 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:12:57,330 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:12:57,331 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375521718] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:12:57,331 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 20:12:57,331 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 6 [2022-11-02 20:12:57,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758146178] [2022-11-02 20:12:57,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:12:57,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:12:57,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:57,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:12:57,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:12:57,335 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:12:57,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:12:57,384 INFO L93 Difference]: Finished difference Result 46 states and 58 transitions. [2022-11-02 20:12:57,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:12:57,385 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2022-11-02 20:12:57,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:12:57,385 INFO L225 Difference]: With dead ends: 46 [2022-11-02 20:12:57,386 INFO L226 Difference]: Without dead ends: 27 [2022-11-02 20:12:57,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:12:57,388 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:12:57,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 30 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:12:57,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-02 20:12:57,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2022-11-02 20:12:57,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:12:57,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-11-02 20:12:57,395 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 28 [2022-11-02 20:12:57,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:12:57,395 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-11-02 20:12:57,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 4 states have internal predecessors, (16), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:12:57,396 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-11-02 20:12:57,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-11-02 20:12:57,397 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:12:57,398 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:12:57,440 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:12:57,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-02 20:12:57,625 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:12:57,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:57,626 INFO L85 PathProgramCache]: Analyzing trace with hash 892558991, now seen corresponding path program 1 times [2022-11-02 20:12:57,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:57,626 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669550319] [2022-11-02 20:12:57,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:57,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:57,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:57,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:12:57,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:57,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 20:12:57,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:57,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-11-02 20:12:57,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:57,905 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-02 20:12:57,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:57,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669550319] [2022-11-02 20:12:57,906 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669550319] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:12:57,906 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:12:57,906 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:12:57,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459268331] [2022-11-02 20:12:57,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:12:57,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:12:57,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:57,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:12:57,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:12:57,916 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:12:57,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:12:57,967 INFO L93 Difference]: Finished difference Result 41 states and 47 transitions. [2022-11-02 20:12:57,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:12:57,968 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2022-11-02 20:12:57,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:12:57,969 INFO L225 Difference]: With dead ends: 41 [2022-11-02 20:12:57,970 INFO L226 Difference]: Without dead ends: 26 [2022-11-02 20:12:57,970 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:12:57,972 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:12:57,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 32 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:12:57,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-02 20:12:57,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-11-02 20:12:57,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:12:57,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2022-11-02 20:12:57,985 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 40 [2022-11-02 20:12:57,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:12:57,987 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2022-11-02 20:12:57,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 20:12:57,987 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2022-11-02 20:12:57,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-02 20:12:57,989 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:12:57,989 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:12:57,989 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 20:12:57,989 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:12:57,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:57,990 INFO L85 PathProgramCache]: Analyzing trace with hash 759414797, now seen corresponding path program 1 times [2022-11-02 20:12:57,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:57,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641523067] [2022-11-02 20:12:57,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:57,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:58,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:58,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:12:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:58,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2022-11-02 20:12:58,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:58,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-02 20:12:58,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 20:12:58,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:12:58,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641523067] [2022-11-02 20:12:58,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641523067] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:12:58,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644396672] [2022-11-02 20:12:58,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:58,144 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:58,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:12:58,146 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:12:58,148 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:12:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:58,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 20:12:58,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:12:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2022-11-02 20:12:58,336 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:12:58,528 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 20:12:58,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644396672] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:12:58,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:12:58,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6] total 10 [2022-11-02 20:12:58,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647687712] [2022-11-02 20:12:58,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:12:58,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 20:12:58,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:12:58,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 20:12:58,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-02 20:12:58,537 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:12:58,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:12:58,631 INFO L93 Difference]: Finished difference Result 53 states and 66 transitions. [2022-11-02 20:12:58,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:12:58,632 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) Word has length 42 [2022-11-02 20:12:58,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:12:58,633 INFO L225 Difference]: With dead ends: 53 [2022-11-02 20:12:58,633 INFO L226 Difference]: Without dead ends: 32 [2022-11-02 20:12:58,634 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 83 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2022-11-02 20:12:58,635 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 43 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:12:58,635 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 97 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:12:58,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-02 20:12:58,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2022-11-02 20:12:58,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 20:12:58,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-11-02 20:12:58,641 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 42 [2022-11-02 20:12:58,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:12:58,641 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-11-02 20:12:58,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 10 states have internal predecessors, (48), 2 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (6), 1 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 20:12:58,641 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-11-02 20:12:58,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-02 20:12:58,643 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:12:58,643 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:12:58,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:12:58,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:12:58,844 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:12:58,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:12:58,844 INFO L85 PathProgramCache]: Analyzing trace with hash -239696728, now seen corresponding path program 2 times [2022-11-02 20:12:58,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:12:58,845 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001480749] [2022-11-02 20:12:58,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:12:58,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:12:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:12:59,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:12:59,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:00,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-02 20:13:00,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:00,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:13:00,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:00,444 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2022-11-02 20:13:00,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:00,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001480749] [2022-11-02 20:13:00,449 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001480749] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:00,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127987727] [2022-11-02 20:13:00,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:13:00,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:00,450 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:00,453 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:00,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:13:00,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:13:00,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:13:00,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 52 conjunts are in the unsatisfiable core [2022-11-02 20:13:00,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:00,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:13:00,786 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 17 [2022-11-02 20:13:01,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:13:01,259 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:13:01,260 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 28 [2022-11-02 20:13:01,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:13:01,364 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:13:01,366 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:13:01,367 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 37 [2022-11-02 20:13:01,904 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 15 proven. 79 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:13:01,904 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:13:02,701 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127987727] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:02,701 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:13:02,701 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 26] total 35 [2022-11-02 20:13:02,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556129388] [2022-11-02 20:13:02,701 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:13:02,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-11-02 20:13:02,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:02,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-11-02 20:13:02,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1738, Unknown=0, NotChecked=0, Total=1980 [2022-11-02 20:13:02,704 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 35 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:13:04,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:04,728 INFO L93 Difference]: Finished difference Result 159 states and 200 transitions. [2022-11-02 20:13:04,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-02 20:13:04,729 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) Word has length 54 [2022-11-02 20:13:04,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:04,732 INFO L225 Difference]: With dead ends: 159 [2022-11-02 20:13:04,733 INFO L226 Difference]: Without dead ends: 128 [2022-11-02 20:13:04,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1948 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=866, Invalid=5454, Unknown=0, NotChecked=0, Total=6320 [2022-11-02 20:13:04,736 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 201 mSDsluCounter, 286 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 1263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 425 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:04,736 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [217 Valid, 313 Invalid, 1263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 740 Invalid, 0 Unknown, 425 Unchecked, 0.7s Time] [2022-11-02 20:13:04,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-11-02 20:13:04,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2022-11-02 20:13:04,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 80 states have (on average 1.2375) internal successors, (99), 81 states have internal predecessors, (99), 8 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (20), 8 states have call predecessors, (20), 8 states have call successors, (20) [2022-11-02 20:13:04,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 127 transitions. [2022-11-02 20:13:04,786 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 127 transitions. Word has length 54 [2022-11-02 20:13:04,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:04,786 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 127 transitions. [2022-11-02 20:13:04,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.34375) internal successors, (75), 31 states have internal predecessors, (75), 5 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 5 states have call successors, (6) [2022-11-02 20:13:04,786 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 127 transitions. [2022-11-02 20:13:04,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-02 20:13:04,789 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:04,789 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:04,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-02 20:13:05,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:05,017 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:13:05,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:05,017 INFO L85 PathProgramCache]: Analyzing trace with hash 1146506666, now seen corresponding path program 1 times [2022-11-02 20:13:05,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:05,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054733518] [2022-11-02 20:13:05,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:05,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:05,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:06,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:13:06,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:07,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-02 20:13:07,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:08,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:13:08,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:08,883 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 1 proven. 84 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:13:08,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:08,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054733518] [2022-11-02 20:13:08,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054733518] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:08,883 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412991002] [2022-11-02 20:13:08,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:08,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:08,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:08,889 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:08,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:13:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:09,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 92 conjunts are in the unsatisfiable core [2022-11-02 20:13:09,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:10,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:13:10,248 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 112 treesize of output 58 [2022-11-02 20:13:10,894 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 123 treesize of output 71 [2022-11-02 20:13:11,091 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:13:11,563 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 155 treesize of output 91 [2022-11-02 20:13:12,010 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 3 proven. 87 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:13:12,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:13:12,682 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 45 treesize of output 41 [2022-11-02 20:13:12,687 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 64 treesize of output 56 [2022-11-02 20:13:12,724 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 44 treesize of output 40 [2022-11-02 20:13:12,728 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 63 treesize of output 55 [2022-11-02 20:13:14,006 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 115 treesize of output 67 [2022-11-02 20:13:14,890 INFO L356 Elim1Store]: treesize reduction 4, result has 76.5 percent of original size [2022-11-02 20:13:14,891 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 21 treesize of output 21 [2022-11-02 20:13:15,153 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-02 20:13:15,153 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412991002] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:13:15,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:13:15,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 28, 26] total 65 [2022-11-02 20:13:15,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766495340] [2022-11-02 20:13:15,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:13:15,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-11-02 20:13:15,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:15,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-11-02 20:13:15,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=3861, Unknown=0, NotChecked=0, Total=4160 [2022-11-02 20:13:15,158 INFO L87 Difference]: Start difference. First operand 93 states and 127 transitions. Second operand has 65 states, 59 states have (on average 1.847457627118644) internal successors, (109), 57 states have internal predecessors, (109), 7 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-02 20:13:25,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:25,793 INFO L93 Difference]: Finished difference Result 279 states and 381 transitions. [2022-11-02 20:13:25,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-02 20:13:25,795 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 59 states have (on average 1.847457627118644) internal successors, (109), 57 states have internal predecessors, (109), 7 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) Word has length 54 [2022-11-02 20:13:25,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:25,798 INFO L225 Difference]: With dead ends: 279 [2022-11-02 20:13:25,798 INFO L226 Difference]: Without dead ends: 275 [2022-11-02 20:13:25,806 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 70 SyntacticMatches, 11 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4029 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=1117, Invalid=11765, Unknown=0, NotChecked=0, Total=12882 [2022-11-02 20:13:25,807 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 229 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 2768 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 2877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 2768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:25,809 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 437 Invalid, 2877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 2768 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-11-02 20:13:25,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-11-02 20:13:25,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 196. [2022-11-02 20:13:25,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 172 states have (on average 1.2383720930232558) internal successors, (213), 178 states have internal predecessors, (213), 12 states have call successors, (12), 5 states have call predecessors, (12), 11 states have return successors, (45), 12 states have call predecessors, (45), 12 states have call successors, (45) [2022-11-02 20:13:25,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 270 transitions. [2022-11-02 20:13:25,877 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 270 transitions. Word has length 54 [2022-11-02 20:13:25,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:25,878 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 270 transitions. [2022-11-02 20:13:25,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 59 states have (on average 1.847457627118644) internal successors, (109), 57 states have internal predecessors, (109), 7 states have call successors, (9), 3 states have call predecessors, (9), 6 states have return successors, (8), 7 states have call predecessors, (8), 7 states have call successors, (8) [2022-11-02 20:13:25,878 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 270 transitions. [2022-11-02 20:13:25,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-02 20:13:25,891 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:25,892 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:25,931 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:26,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:13:26,109 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:13:26,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:26,110 INFO L85 PathProgramCache]: Analyzing trace with hash 753479656, now seen corresponding path program 2 times [2022-11-02 20:13:26,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:26,110 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663170053] [2022-11-02 20:13:26,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:26,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:27,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:13:27,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:27,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-02 20:13:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:27,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:13:27,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:27,775 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 24 proven. 59 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:13:27,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:27,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663170053] [2022-11-02 20:13:27,775 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663170053] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:27,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1841784258] [2022-11-02 20:13:27,775 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 20:13:27,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:27,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:27,777 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:27,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:13:27,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 20:13:27,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:13:27,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 57 conjunts are in the unsatisfiable core [2022-11-02 20:13:27,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:28,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:13:28,296 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:13:28,296 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 28 [2022-11-02 20:13:28,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:13:28,521 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:13:28,521 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 43 treesize of output 28 [2022-11-02 20:13:28,618 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 20:13:28,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 20:13:28,622 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:13:28,623 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 37 [2022-11-02 20:13:29,319 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 1 proven. 87 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-02 20:13:29,319 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:13:30,114 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1841784258] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:30,114 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:13:30,114 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 42 [2022-11-02 20:13:30,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161133674] [2022-11-02 20:13:30,115 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:13:30,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-02 20:13:30,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:30,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-02 20:13:30,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=2342, Unknown=0, NotChecked=0, Total=2550 [2022-11-02 20:13:30,117 INFO L87 Difference]: Start difference. First operand 196 states and 270 transitions. Second operand has 42 states, 40 states have (on average 2.025) internal successors, (81), 40 states have internal predecessors, (81), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-02 20:13:32,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:32,994 INFO L93 Difference]: Finished difference Result 353 states and 474 transitions. [2022-11-02 20:13:32,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-11-02 20:13:32,995 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.025) internal successors, (81), 40 states have internal predecessors, (81), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) Word has length 54 [2022-11-02 20:13:32,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:32,998 INFO L225 Difference]: With dead ends: 353 [2022-11-02 20:13:32,998 INFO L226 Difference]: Without dead ends: 330 [2022-11-02 20:13:33,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 54 SyntacticMatches, 5 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2587 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=749, Invalid=7623, Unknown=0, NotChecked=0, Total=8372 [2022-11-02 20:13:33,002 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 110 mSDsluCounter, 502 mSDsCounter, 0 mSdLazyCounter, 815 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 536 SdHoareTripleChecker+Invalid, 1698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 855 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:33,002 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 536 Invalid, 1698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 815 Invalid, 0 Unknown, 855 Unchecked, 0.7s Time] [2022-11-02 20:13:33,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-11-02 20:13:33,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 250. [2022-11-02 20:13:33,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 221 states have (on average 1.239819004524887) internal successors, (274), 227 states have internal predecessors, (274), 14 states have call successors, (14), 8 states have call predecessors, (14), 14 states have return successors, (47), 14 states have call predecessors, (47), 14 states have call successors, (47) [2022-11-02 20:13:33,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 335 transitions. [2022-11-02 20:13:33,042 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 335 transitions. Word has length 54 [2022-11-02 20:13:33,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:33,043 INFO L495 AbstractCegarLoop]: Abstraction has 250 states and 335 transitions. [2022-11-02 20:13:33,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.025) internal successors, (81), 40 states have internal predecessors, (81), 4 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 3 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-02 20:13:33,043 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 335 transitions. [2022-11-02 20:13:33,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-02 20:13:33,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:33,045 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:33,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:33,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:33,260 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:13:33,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:33,260 INFO L85 PathProgramCache]: Analyzing trace with hash -257637594, now seen corresponding path program 3 times [2022-11-02 20:13:33,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:33,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674005954] [2022-11-02 20:13:33,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:33,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:33,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:13:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:34,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-02 20:13:34,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:34,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:13:34,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 24 proven. 61 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2022-11-02 20:13:34,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:34,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674005954] [2022-11-02 20:13:34,357 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674005954] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:34,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700358988] [2022-11-02 20:13:34,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 20:13:34,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:34,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:34,358 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:34,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:13:34,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2022-11-02 20:13:34,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:13:34,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 37 conjunts are in the unsatisfiable core [2022-11-02 20:13:34,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:34,665 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 [2022-11-02 20:13:34,718 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 16 treesize of output 12 [2022-11-02 20:13:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 50 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2022-11-02 20:13:35,287 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:13:35,441 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700358988] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:35,441 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:13:35,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 33 [2022-11-02 20:13:35,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015342405] [2022-11-02 20:13:35,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:13:35,441 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-02 20:13:35,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:13:35,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-02 20:13:35,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2022-11-02 20:13:35,442 INFO L87 Difference]: Start difference. First operand 250 states and 335 transitions. Second operand has 33 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-02 20:13:37,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:13:37,399 INFO L93 Difference]: Finished difference Result 555 states and 857 transitions. [2022-11-02 20:13:37,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-02 20:13:37,399 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 54 [2022-11-02 20:13:37,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:13:37,404 INFO L225 Difference]: With dead ends: 555 [2022-11-02 20:13:37,404 INFO L226 Difference]: Without dead ends: 545 [2022-11-02 20:13:37,407 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=458, Invalid=3574, Unknown=0, NotChecked=0, Total=4032 [2022-11-02 20:13:37,408 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 96 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 655 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 443 SdHoareTripleChecker+Invalid, 1173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 454 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:13:37,409 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 443 Invalid, 1173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 655 Invalid, 0 Unknown, 454 Unchecked, 0.6s Time] [2022-11-02 20:13:37,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-11-02 20:13:37,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 494. [2022-11-02 20:13:37,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 437 states have (on average 1.2471395881006866) internal successors, (545), 445 states have internal predecessors, (545), 34 states have call successors, (34), 14 states have call predecessors, (34), 22 states have return successors, (145), 34 states have call predecessors, (145), 34 states have call successors, (145) [2022-11-02 20:13:37,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 724 transitions. [2022-11-02 20:13:37,490 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 724 transitions. Word has length 54 [2022-11-02 20:13:37,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:13:37,490 INFO L495 AbstractCegarLoop]: Abstraction has 494 states and 724 transitions. [2022-11-02 20:13:37,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 31 states have internal predecessors, (81), 4 states have call successors, (6), 3 states have call predecessors, (6), 6 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-11-02 20:13:37,491 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 724 transitions. [2022-11-02 20:13:37,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-02 20:13:37,495 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:13:37,495 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:13:37,530 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:13:37,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:37,708 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:13:37,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:13:37,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1074120108, now seen corresponding path program 4 times [2022-11-02 20:13:37,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:13:37,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264928388] [2022-11-02 20:13:37,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:13:37,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:13:37,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:38,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 20:13:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:38,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2022-11-02 20:13:38,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:38,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2022-11-02 20:13:38,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:13:38,428 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-02 20:13:38,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:13:38,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264928388] [2022-11-02 20:13:38,429 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264928388] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 20:13:38,429 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124558099] [2022-11-02 20:13:38,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 20:13:38,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:13:38,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:13:38,431 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:13:38,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:13:38,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 20:13:38,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 20:13:38,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 53 conjunts are in the unsatisfiable core [2022-11-02 20:13:38,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:13:38,950 INFO L356 Elim1Store]: treesize reduction 33, result has 21.4 percent of original size [2022-11-02 20:13:38,950 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 34 treesize of output 36 [2022-11-02 20:13:39,215 INFO L356 Elim1Store]: treesize reduction 125, result has 10.7 percent of original size [2022-11-02 20:13:39,216 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 33 [2022-11-02 20:13:39,928 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:13:39,928 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:14:07,014 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 104 treesize of output 90 [2022-11-02 20:14:07,033 INFO L356 Elim1Store]: treesize reduction 18, result has 21.7 percent of original size [2022-11-02 20:14:07,034 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 812 treesize of output 663 [2022-11-02 20:14:10,733 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:14:10,734 INFO L390 Elim1Store]: Elim1 did not use preprocessing 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 106 treesize of output 100 [2022-11-02 20:14:10,747 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 9 treesize of output 3 [2022-11-02 20:14:10,781 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-02 20:14:10,782 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 715 treesize of output 633 [2022-11-02 20:14:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 6 proven. 85 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-02 20:14:13,051 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124558099] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:14:13,052 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 20:14:13,052 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 25, 23] total 61 [2022-11-02 20:14:13,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108401356] [2022-11-02 20:14:13,055 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 20:14:13,057 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-11-02 20:14:13,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:14:13,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-11-02 20:14:13,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=3304, Unknown=11, NotChecked=0, Total=3660 [2022-11-02 20:14:13,059 INFO L87 Difference]: Start difference. First operand 494 states and 724 transitions. Second operand has 61 states, 57 states have (on average 2.280701754385965) internal successors, (130), 59 states have internal predecessors, (130), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-02 20:14:33,559 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse7 (< 2 c_~N~0)) (.cse14 (< 3 c_~N~0)) (.cse6 (+ |c_max_#in~x.offset| 4)) (.cse5 (select |c_#memory_int| |c_max_#in~x.base|)) (.cse13 (* c_~N~0 4))) (let ((.cse1 (< c_max_~ret~0 |c_max_#t~mem2|)) (.cse0 (= |c_max_#in~x.base| c_max_~x.base)) (.cse2 (forall ((v_ArrVal_160 Int) (|ULTIMATE.start_main_~i~1#1| Int)) (let ((.cse15 (store (let ((.cse17 (* |ULTIMATE.start_main_~i~1#1| 4))) (store .cse5 (+ .cse17 |c_max_#in~x.offset|) (select .cse5 (+ .cse17 |c_max_#in~x.offset| 4)))) (+ .cse13 |c_max_#in~x.offset| (- 4)) v_ArrVal_160))) (let ((.cse16 (select .cse15 |c_max_#in~x.offset|))) (or (< (select .cse15 .cse6) (+ .cse16 1)) (< .cse16 1) (< (+ 2 |ULTIMATE.start_main_~i~1#1|) c_~N~0) (not (< (+ |ULTIMATE.start_main_~i~1#1| 1) c_~N~0))))))) (.cse3 (and .cse7 (not .cse14)))) (and .cse0 (or .cse1 .cse2 .cse3) (or (let ((.cse4 (select .cse5 |c_max_#in~x.offset|))) (and (not (< .cse4 1)) (not (< (select .cse5 .cse6) (+ .cse4 1))))) (not .cse1)) (<= (select (select |c_#memory_int| c_max_~x.base) |c_max_#in~x.offset|) 0) (or (let ((.cse12 (+ (* c_max_~i~0 4) c_max_~x.offset))) (let ((.cse10 (< c_max_~ret~0 2)) (.cse8 (< c_max_~ret~0 1)) (.cse9 (<= c_~N~0 1)) (.cse11 (= .cse6 .cse12))) (and (or (and .cse0 (or .cse7 .cse8 .cse9) .cse10 .cse11) (= |c_max_#in~x.offset| .cse12)) (or (not (= .cse13 4)) (and .cse0 .cse10 .cse11)) (or (and .cse0 .cse8 (or .cse7 .cse9)) .cse11)))) .cse3) (or (not .cse7) .cse14) (or .cse2 .cse3)))) is different from false [2022-11-02 20:15:09,258 WARN L234 SmtUtils]: Spent 19.86s on a formula simplification. DAG size of input: 51 DAG size of output: 48 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:16:12,764 WARN L234 SmtUtils]: Spent 12.16s on a formula simplification. DAG size of input: 44 DAG size of output: 41 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-02 20:16:13,708 WARN L833 $PredicateComparison]: unable to prove that (let ((.cse3 (< 2 c_~N~0)) (.cse4 (< 3 c_~N~0)) (.cse2 (select |c_#memory_int| |c_max_#in~x.base|))) (let ((.cse0 (forall ((v_ArrVal_160 Int) (|ULTIMATE.start_main_~i~1#1| Int)) (let ((.cse5 (store (let ((.cse7 (* |ULTIMATE.start_main_~i~1#1| 4))) (store .cse2 (+ .cse7 |c_max_#in~x.offset|) (select .cse2 (+ .cse7 |c_max_#in~x.offset| 4)))) (+ (* c_~N~0 4) |c_max_#in~x.offset| (- 4)) v_ArrVal_160))) (let ((.cse6 (select .cse5 |c_max_#in~x.offset|))) (or (< (select .cse5 (+ |c_max_#in~x.offset| 4)) (+ .cse6 1)) (< .cse6 1) (< (+ 2 |ULTIMATE.start_main_~i~1#1|) c_~N~0) (not (< (+ |ULTIMATE.start_main_~i~1#1| 1) c_~N~0))))))) (.cse1 (and .cse3 (not .cse4)))) (and (or (< c_max_~ret~0 |c_max_#t~mem2|) .cse0 .cse1) (<= (select .cse2 |c_max_#in~x.offset|) 0) (or (not .cse3) .cse4) (or .cse0 .cse1)))) is different from false [2022-11-02 20:16:14,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:16:14,550 INFO L93 Difference]: Finished difference Result 1114 states and 1605 transitions. [2022-11-02 20:16:14,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-11-02 20:16:14,550 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 57 states have (on average 2.280701754385965) internal successors, (130), 59 states have internal predecessors, (130), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) Word has length 54 [2022-11-02 20:16:14,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:16:14,557 INFO L225 Difference]: With dead ends: 1114 [2022-11-02 20:16:14,558 INFO L226 Difference]: Without dead ends: 931 [2022-11-02 20:16:14,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 103 SyntacticMatches, 5 SemanticMatches, 152 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 7773 ImplicationChecksByTransitivity, 149.1s TimeCoverageRelationStatistics Valid=2117, Invalid=20771, Unknown=72, NotChecked=602, Total=23562 [2022-11-02 20:16:14,565 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 452 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 1506 mSolverCounterSat, 240 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 881 SdHoareTripleChecker+Invalid, 3453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 240 IncrementalHoareTripleChecker+Valid, 1506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1707 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-11-02 20:16:14,566 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [462 Valid, 881 Invalid, 3453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [240 Valid, 1506 Invalid, 0 Unknown, 1707 Unchecked, 1.6s Time] [2022-11-02 20:16:14,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2022-11-02 20:16:14,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 692. [2022-11-02 20:16:14,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 692 states, 614 states have (on average 1.247557003257329) internal successors, (766), 631 states have internal predecessors, (766), 43 states have call successors, (43), 22 states have call predecessors, (43), 34 states have return successors, (208), 38 states have call predecessors, (208), 43 states have call successors, (208) [2022-11-02 20:16:14,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 692 states to 692 states and 1017 transitions. [2022-11-02 20:16:14,675 INFO L78 Accepts]: Start accepts. Automaton has 692 states and 1017 transitions. Word has length 54 [2022-11-02 20:16:14,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:16:14,675 INFO L495 AbstractCegarLoop]: Abstraction has 692 states and 1017 transitions. [2022-11-02 20:16:14,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 57 states have (on average 2.280701754385965) internal successors, (130), 59 states have internal predecessors, (130), 9 states have call successors, (9), 4 states have call predecessors, (9), 9 states have return successors, (9), 6 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-02 20:16:14,676 INFO L276 IsEmpty]: Start isEmpty. Operand 692 states and 1017 transitions. [2022-11-02 20:16:14,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-11-02 20:16:14,679 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:16:14,680 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:16:14,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:16:14,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_264af27e-eb97-4c01-b855-c7778702805c/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:16:14,900 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:16:14,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:16:14,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1612855716, now seen corresponding path program 5 times [2022-11-02 20:16:14,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:16:14,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4347581] [2022-11-02 20:16:14,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:16:14,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:16:14,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat