./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/max20-1.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_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/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_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/max20-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/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_5f3815cc-989c-4084-951e-e4382a3cb98e/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 da9ac0c3f4abc9a6d9e8b4bf1276cf60fb65e65c55d9f94968d51682bf71ef87 --- 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 21:05:42,617 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:05:42,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:05:42,647 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:05:42,648 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:05:42,649 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:05:42,650 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:05:42,652 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:05:42,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:05:42,655 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:05:42,657 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:05:42,658 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:05:42,658 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:05:42,660 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:05:42,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:05:42,662 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:05:42,664 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:05:42,665 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:05:42,666 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:05:42,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:05:42,670 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:05:42,671 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:05:42,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:05:42,674 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:05:42,678 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:05:42,678 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:05:42,679 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:05:42,680 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:05:42,680 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:05:42,681 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:05:42,682 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:05:42,683 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:05:42,684 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:05:42,685 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:05:42,686 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:05:42,687 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:05:42,688 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:05:42,688 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:05:42,688 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:05:42,689 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:05:42,690 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:05:42,691 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 21:05:42,712 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:05:42,713 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:05:42,713 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:05:42,713 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:05:42,714 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:05:42,714 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:05:42,715 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:05:42,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:05:42,716 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:05:42,716 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:05:42,716 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:05:42,717 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:05:42,717 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:05:42,717 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:05:42,717 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:05:42,718 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:05:42,718 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:05:42,718 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:05:42,718 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:05:42,719 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:05:42,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:05:42,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:05:42,720 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:05:42,720 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:05:42,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:05:42,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:05:42,721 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:05:42,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:05:42,721 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:05:42,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:05:42,722 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:05:42,722 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:05:42,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:05:42,723 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_5f3815cc-989c-4084-951e-e4382a3cb98e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> da9ac0c3f4abc9a6d9e8b4bf1276cf60fb65e65c55d9f94968d51682bf71ef87 [2022-11-02 21:05:43,036 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:05:43,060 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:05:43,064 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:05:43,066 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:05:43,066 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:05:43,068 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/reducercommutativity/max20-1.i [2022-11-02 21:05:43,155 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/data/dc1ddb85c/fcc5f175de6c4db8a53725ee405e054e/FLAG04f03f5c6 [2022-11-02 21:05:43,635 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:05:43,635 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/sv-benchmarks/c/reducercommutativity/max20-1.i [2022-11-02 21:05:43,642 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/data/dc1ddb85c/fcc5f175de6c4db8a53725ee405e054e/FLAG04f03f5c6 [2022-11-02 21:05:44,028 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/data/dc1ddb85c/fcc5f175de6c4db8a53725ee405e054e [2022-11-02 21:05:44,031 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:05:44,033 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:05:44,036 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:05:44,037 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:05:44,040 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:05:44,041 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:05:44" (1/1) ... [2022-11-02 21:05:44,042 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ab7e4e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:44, skipping insertion in model container [2022-11-02 21:05:44,042 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:05:44" (1/1) ... [2022-11-02 21:05:44,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:05:44,068 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:05:44,314 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_5f3815cc-989c-4084-951e-e4382a3cb98e/sv-benchmarks/c/reducercommutativity/max20-1.i[1290,1303] [2022-11-02 21:05:44,323 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:05:44,333 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:05:44,374 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_5f3815cc-989c-4084-951e-e4382a3cb98e/sv-benchmarks/c/reducercommutativity/max20-1.i[1290,1303] [2022-11-02 21:05:44,385 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:05:44,402 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:05:44,402 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:44 WrapperNode [2022-11-02 21:05:44,403 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:05:44,404 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:05:44,404 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:05:44,404 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:05:44,412 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:44" (1/1) ... [2022-11-02 21:05:44,432 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:44" (1/1) ... [2022-11-02 21:05:44,460 INFO L138 Inliner]: procedures = 16, calls = 23, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 67 [2022-11-02 21:05:44,460 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:05:44,461 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:05:44,462 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:05:44,462 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:05:44,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:44" (1/1) ... [2022-11-02 21:05:44,471 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:44" (1/1) ... [2022-11-02 21:05:44,477 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:44" (1/1) ... [2022-11-02 21:05:44,478 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:44" (1/1) ... [2022-11-02 21:05:44,494 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:44" (1/1) ... [2022-11-02 21:05:44,500 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:44" (1/1) ... [2022-11-02 21:05:44,506 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:44" (1/1) ... [2022-11-02 21:05:44,512 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:44" (1/1) ... [2022-11-02 21:05:44,515 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:05:44,516 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:05:44,517 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:05:44,517 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:05:44,519 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:44" (1/1) ... [2022-11-02 21:05:44,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:05:44,540 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:44,553 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:05:44,567 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:05:44,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:05:44,596 INFO L130 BoogieDeclarations]: Found specification of procedure max [2022-11-02 21:05:44,597 INFO L138 BoogieDeclarations]: Found implementation of procedure max [2022-11-02 21:05:44,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:05:44,597 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-02 21:05:44,597 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-02 21:05:44,597 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:05:44,597 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:05:44,598 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-02 21:05:44,598 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-02 21:05:44,714 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:05:44,716 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:05:44,956 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:05:44,962 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:05:44,962 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-02 21:05:44,964 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:05:44 BoogieIcfgContainer [2022-11-02 21:05:44,964 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:05:44,966 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:05:44,966 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:05:44,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:05:44,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:05:44" (1/3) ... [2022-11-02 21:05:44,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fbef0ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:05:44, skipping insertion in model container [2022-11-02 21:05:44,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:05:44" (2/3) ... [2022-11-02 21:05:44,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2fbef0ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:05:44, skipping insertion in model container [2022-11-02 21:05:44,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:05:44" (3/3) ... [2022-11-02 21:05:44,974 INFO L112 eAbstractionObserver]: Analyzing ICFG max20-1.i [2022-11-02 21:05:44,992 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:05:44,993 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:05:45,042 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:05:45,049 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;@b93cbc8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:05:45,049 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 21:05:45,053 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 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 21:05:45,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 21:05:45,061 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:45,062 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 21:05:45,063 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:45,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:45,068 INFO L85 PathProgramCache]: Analyzing trace with hash -528134526, now seen corresponding path program 1 times [2022-11-02 21:05:45,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:45,078 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498731379] [2022-11-02 21:05:45,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:45,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:45,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:45,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:05:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:45,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-02 21:05:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:45,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 21:05:45,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:45,408 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 21:05:45,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:45,409 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498731379] [2022-11-02 21:05:45,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498731379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:45,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:05:45,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:05:45,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066864417] [2022-11-02 21:05:45,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:45,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 21:05:45,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:45,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 21:05:45,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 21:05:45,468 INFO L87 Difference]: Start difference. First operand has 28 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 23 states have internal predecessors, (31), 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:05:45,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:45,498 INFO L93 Difference]: Finished difference Result 52 states and 71 transitions. [2022-11-02 21:05:45,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 21:05:45,501 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-11-02 21:05:45,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:45,508 INFO L225 Difference]: With dead ends: 52 [2022-11-02 21:05:45,509 INFO L226 Difference]: Without dead ends: 24 [2022-11-02 21:05:45,512 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 21:05:45,518 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 21:05:45,519 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 21:05:45,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-02 21:05:45,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-02 21:05:45,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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 21:05:45,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2022-11-02 21:05:45,563 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 28 [2022-11-02 21:05:45,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:45,563 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2022-11-02 21:05:45,564 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), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:05:45,564 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2022-11-02 21:05:45,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 21:05:45,566 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:45,566 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 21:05:45,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:05:45,567 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:45,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:45,568 INFO L85 PathProgramCache]: Analyzing trace with hash -321958693, now seen corresponding path program 1 times [2022-11-02 21:05:45,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:45,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209924528] [2022-11-02 21:05:45,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:45,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:45,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:45,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2022-11-02 21:05:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:45,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2022-11-02 21:05:45,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:45,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2022-11-02 21:05:45,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:45,781 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 21:05:45,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:45,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209924528] [2022-11-02 21:05:45,782 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209924528] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:45,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392729930] [2022-11-02 21:05:45,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:45,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:45,783 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:45,791 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:45,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 21:05:45,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:45,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 21:05:45,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:45,977 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 21:05:45,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:05:45,983 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392729930] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:45,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:05:45,984 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-02 21:05:45,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557714653] [2022-11-02 21:05:45,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:45,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:05:45,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:45,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:05:45,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:05:45,992 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:05:46,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:46,007 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-11-02 21:05:46,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:05:46,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-11-02 21:05:46,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:46,009 INFO L225 Difference]: With dead ends: 46 [2022-11-02 21:05:46,009 INFO L226 Difference]: Without dead ends: 26 [2022-11-02 21:05:46,010 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:05:46,011 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:46,012 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 52 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:05:46,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-02 21:05:46,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-11-02 21:05:46,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 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 21:05:46,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2022-11-02 21:05:46,019 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 28 [2022-11-02 21:05:46,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:46,019 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2022-11-02 21:05:46,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 21:05:46,020 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2022-11-02 21:05:46,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 21:05:46,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:46,021 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, 1, 1] [2022-11-02 21:05:46,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:46,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-02 21:05:46,239 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:46,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:46,239 INFO L85 PathProgramCache]: Analyzing trace with hash -1777476163, now seen corresponding path program 1 times [2022-11-02 21:05:46,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:46,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795312520] [2022-11-02 21:05:46,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:46,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:46,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:46,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:05:46,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:46,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2022-11-02 21:05:46,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:46,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-11-02 21:05:46,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:46,356 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:05:46,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:46,356 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795312520] [2022-11-02 21:05:46,356 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795312520] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:46,357 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356737505] [2022-11-02 21:05:46,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:46,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:46,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:46,370 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:46,380 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 21:05:46,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:46,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 21:05:46,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:46,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:05:46,462 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:05:46,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356737505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:46,462 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:05:46,462 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2022-11-02 21:05:46,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045889866] [2022-11-02 21:05:46,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:46,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:05:46,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:46,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:05:46,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:05:46,465 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 21:05:46,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:46,479 INFO L93 Difference]: Finished difference Result 48 states and 61 transitions. [2022-11-02 21:05:46,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:05:46,495 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 30 [2022-11-02 21:05:46,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:46,496 INFO L225 Difference]: With dead ends: 48 [2022-11-02 21:05:46,496 INFO L226 Difference]: Without dead ends: 29 [2022-11-02 21:05:46,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:05:46,498 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:46,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 50 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:05:46,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-02 21:05:46,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 26. [2022-11-02 21:05:46,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 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 21:05:46,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2022-11-02 21:05:46,504 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 30 [2022-11-02 21:05:46,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:46,504 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2022-11-02 21:05:46,505 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 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 21:05:46,505 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2022-11-02 21:05:46,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-02 21:05:46,506 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:46,506 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 21:05:46,545 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:46,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:46,731 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:46,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:46,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1540631384, now seen corresponding path program 1 times [2022-11-02 21:05:46,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:46,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560500283] [2022-11-02 21:05:46,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:46,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:46,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:05:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:46,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 21:05:46,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:46,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2022-11-02 21:05:46,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:46,962 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:05:46,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:46,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560500283] [2022-11-02 21:05:46,963 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560500283] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:46,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378442308] [2022-11-02 21:05:46,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:46,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:46,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:46,968 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:46,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 21:05:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:47,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-02 21:05:47,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:47,108 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-02 21:05:47,108 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:05:47,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378442308] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:05:47,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:05:47,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2022-11-02 21:05:47,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070851214] [2022-11-02 21:05:47,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:05:47,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:05:47,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:47,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:05:47,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:05:47,112 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:05:47,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:47,125 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2022-11-02 21:05:47,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:05:47,126 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 42 [2022-11-02 21:05:47,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:47,127 INFO L225 Difference]: With dead ends: 43 [2022-11-02 21:05:47,128 INFO L226 Difference]: Without dead ends: 28 [2022-11-02 21:05:47,128 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:05:47,129 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 1 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:47,130 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 51 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:05:47,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-02 21:05:47,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2022-11-02 21:05:47,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 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 21:05:47,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2022-11-02 21:05:47,136 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 42 [2022-11-02 21:05:47,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:47,138 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2022-11-02 21:05:47,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 9.333333333333334) internal successors, (28), 3 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-11-02 21:05:47,139 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2022-11-02 21:05:47,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-02 21:05:47,140 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:47,141 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, 1, 1] [2022-11-02 21:05:47,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:47,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:47,348 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:47,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:47,348 INFO L85 PathProgramCache]: Analyzing trace with hash -180199466, now seen corresponding path program 1 times [2022-11-02 21:05:47,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:47,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294519839] [2022-11-02 21:05:47,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:47,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:47,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:47,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2022-11-02 21:05:47,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:47,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2022-11-02 21:05:47,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:47,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2022-11-02 21:05:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:47,492 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 21:05:47,492 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:47,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294519839] [2022-11-02 21:05:47,493 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294519839] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:47,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119830402] [2022-11-02 21:05:47,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:47,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:47,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:47,512 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:47,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 21:05:47,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:47,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 21:05:47,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-02 21:05:47,656 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:47,698 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2022-11-02 21:05:47,699 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119830402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:05:47,699 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:05:47,699 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-11-02 21:05:47,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413482417] [2022-11-02 21:05:47,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:47,700 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:05:47,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:47,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:05:47,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:05:47,701 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 21:05:47,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:47,766 INFO L93 Difference]: Finished difference Result 62 states and 80 transitions. [2022-11-02 21:05:47,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:05:47,767 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 44 [2022-11-02 21:05:47,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:47,772 INFO L225 Difference]: With dead ends: 62 [2022-11-02 21:05:47,772 INFO L226 Difference]: Without dead ends: 40 [2022-11-02 21:05:47,774 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:05:47,775 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 15 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:47,775 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 70 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:05:47,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-02 21:05:47,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2022-11-02 21:05:47,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.15625) internal successors, (37), 32 states have internal predecessors, (37), 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 21:05:47,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 43 transitions. [2022-11-02 21:05:47,781 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 43 transitions. Word has length 44 [2022-11-02 21:05:47,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:47,782 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 43 transitions. [2022-11-02 21:05:47,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 9 states have internal predecessors, (43), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 21:05:47,788 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 43 transitions. [2022-11-02 21:05:47,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-02 21:05:47,794 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:47,794 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 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 21:05:47,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:48,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:48,011 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:48,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:48,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1875433, now seen corresponding path program 2 times [2022-11-02 21:05:48,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:48,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221580323] [2022-11-02 21:05:48,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:48,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:48,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:48,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-11-02 21:05:48,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:48,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-11-02 21:05:48,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:48,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2022-11-02 21:05:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2022-11-02 21:05:48,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:48,144 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221580323] [2022-11-02 21:05:48,144 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221580323] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:48,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247618581] [2022-11-02 21:05:48,145 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:05:48,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:48,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:48,147 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:48,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 21:05:48,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:05:48,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:05:48,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 21:05:48,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:48,325 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-02 21:05:48,326 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:48,421 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2022-11-02 21:05:48,421 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247618581] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:05:48,422 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:05:48,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 14 [2022-11-02 21:05:48,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762586940] [2022-11-02 21:05:48,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:48,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 21:05:48,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:48,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 21:05:48,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-02 21:05:48,424 INFO L87 Difference]: Start difference. First operand 37 states and 43 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 21:05:48,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:48,481 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2022-11-02 21:05:48,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 21:05:48,482 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 62 [2022-11-02 21:05:48,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:48,483 INFO L225 Difference]: With dead ends: 78 [2022-11-02 21:05:48,483 INFO L226 Difference]: Without dead ends: 52 [2022-11-02 21:05:48,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-02 21:05:48,484 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:48,485 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 93 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:05:48,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-11-02 21:05:48,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2022-11-02 21:05:48,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.108695652173913) internal successors, (51), 46 states have internal predecessors, (51), 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 21:05:48,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 57 transitions. [2022-11-02 21:05:48,502 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 57 transitions. Word has length 62 [2022-11-02 21:05:48,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:48,504 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 57 transitions. [2022-11-02 21:05:48,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2022-11-02 21:05:48,504 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 57 transitions. [2022-11-02 21:05:48,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-11-02 21:05:48,507 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:48,508 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 6, 6, 6, 6, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:48,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:48,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:48,735 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:48,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:48,736 INFO L85 PathProgramCache]: Analyzing trace with hash 1341943393, now seen corresponding path program 3 times [2022-11-02 21:05:48,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:48,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393677411] [2022-11-02 21:05:48,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:48,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:49,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2022-11-02 21:05:49,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:49,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-11-02 21:05:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:49,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2022-11-02 21:05:49,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:49,057 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 97 trivial. 0 not checked. [2022-11-02 21:05:49,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:49,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393677411] [2022-11-02 21:05:49,058 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393677411] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:49,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270311595] [2022-11-02 21:05:49,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:05:49,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:49,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:49,059 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:49,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 21:05:49,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-02 21:05:49,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:05:49,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:05:49,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:49,267 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-11-02 21:05:49,267 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:49,336 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 48 proven. 6 refuted. 0 times theorem prover too weak. 143 trivial. 0 not checked. [2022-11-02 21:05:49,336 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [270311595] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:05:49,336 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:05:49,337 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 5, 5] total 19 [2022-11-02 21:05:49,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738312346] [2022-11-02 21:05:49,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:49,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-02 21:05:49,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:49,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-02 21:05:49,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-02 21:05:49,341 INFO L87 Difference]: Start difference. First operand 51 states and 57 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 21:05:49,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:49,441 INFO L93 Difference]: Finished difference Result 98 states and 121 transitions. [2022-11-02 21:05:49,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-11-02 21:05:49,442 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 76 [2022-11-02 21:05:49,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:49,447 INFO L225 Difference]: With dead ends: 98 [2022-11-02 21:05:49,448 INFO L226 Difference]: Without dead ends: 70 [2022-11-02 21:05:49,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2022-11-02 21:05:49,453 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 39 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:49,455 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 160 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:05:49,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-11-02 21:05:49,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2022-11-02 21:05:49,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.140625) internal successors, (73), 64 states have internal predecessors, (73), 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 21:05:49,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2022-11-02 21:05:49,476 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 76 [2022-11-02 21:05:49,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:49,476 INFO L495 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2022-11-02 21:05:49,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 19 states have internal predecessors, (72), 2 states have call successors, (6), 1 states have call predecessors, (6), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 21:05:49,477 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2022-11-02 21:05:49,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-11-02 21:05:49,479 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:49,479 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 11, 11, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:49,519 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:49,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:49,695 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:49,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:49,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1821282991, now seen corresponding path program 4 times [2022-11-02 21:05:49,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:49,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284193830] [2022-11-02 21:05:49,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:49,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:50,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2022-11-02 21:05:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:50,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-11-02 21:05:50,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:50,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2022-11-02 21:05:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:50,116 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-11-02 21:05:50,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:50,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284193830] [2022-11-02 21:05:50,117 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284193830] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:50,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438752252] [2022-11-02 21:05:50,117 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:05:50,117 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:50,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:50,118 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:50,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 21:05:50,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:05:50,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:05:50,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-02 21:05:50,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:50,343 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-11-02 21:05:50,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:50,590 INFO L134 CoverageAnalysis]: Checked inductivity of 806 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 685 trivial. 0 not checked. [2022-11-02 21:05:50,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438752252] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:05:50,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:05:50,590 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 23 [2022-11-02 21:05:50,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255500289] [2022-11-02 21:05:50,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:50,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 21:05:50,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:50,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 21:05:50,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-11-02 21:05:50,593 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 21:05:50,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:50,672 INFO L93 Difference]: Finished difference Result 131 states and 159 transitions. [2022-11-02 21:05:50,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:05:50,672 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 126 [2022-11-02 21:05:50,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:50,673 INFO L225 Difference]: With dead ends: 131 [2022-11-02 21:05:50,673 INFO L226 Difference]: Without dead ends: 87 [2022-11-02 21:05:50,674 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 245 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2022-11-02 21:05:50,675 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 20 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:50,675 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 77 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:05:50,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-02 21:05:50,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-11-02 21:05:50,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 82 states have internal predecessors, (91), 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 21:05:50,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2022-11-02 21:05:50,684 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 126 [2022-11-02 21:05:50,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:50,684 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2022-11-02 21:05:50,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0869565217391304) internal successors, (71), 23 states have internal predecessors, (71), 1 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 21:05:50,685 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2022-11-02 21:05:50,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-11-02 21:05:50,686 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:50,686 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 18, 18, 18, 18, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:50,722 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:50,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-02 21:05:50,898 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:50,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:50,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1526385697, now seen corresponding path program 5 times [2022-11-02 21:05:50,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:50,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574797799] [2022-11-02 21:05:50,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:50,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:51,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 21:05:51,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:51,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-11-02 21:05:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:51,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2022-11-02 21:05:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:51,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 699 trivial. 0 not checked. [2022-11-02 21:05:51,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:51,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574797799] [2022-11-02 21:05:51,371 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574797799] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:51,371 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830924763] [2022-11-02 21:05:51,372 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:05:51,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:51,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:51,373 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:51,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 21:05:52,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2022-11-02 21:05:52,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:05:53,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 21:05:53,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 316 proven. 66 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2022-11-02 21:05:53,054 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:53,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1085 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 699 trivial. 0 not checked. [2022-11-02 21:05:53,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830924763] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:05:53,205 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:05:53,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2022-11-02 21:05:53,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678167650] [2022-11-02 21:05:53,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:53,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 21:05:53,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:53,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 21:05:53,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-11-02 21:05:53,210 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 21:05:53,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:53,300 INFO L93 Difference]: Finished difference Result 162 states and 199 transitions. [2022-11-02 21:05:53,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 21:05:53,301 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 144 [2022-11-02 21:05:53,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:53,304 INFO L225 Difference]: With dead ends: 162 [2022-11-02 21:05:53,304 INFO L226 Difference]: Without dead ends: 119 [2022-11-02 21:05:53,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 287 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2022-11-02 21:05:53,307 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 76 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 140 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:53,308 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 140 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:05:53,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-11-02 21:05:53,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-11-02 21:05:53,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.1491228070175439) internal successors, (131), 114 states have internal predecessors, (131), 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 21:05:53,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 137 transitions. [2022-11-02 21:05:53,338 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 137 transitions. Word has length 144 [2022-11-02 21:05:53,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:53,339 INFO L495 AbstractCegarLoop]: Abstraction has 119 states and 137 transitions. [2022-11-02 21:05:53,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 5.125) internal successors, (82), 16 states have internal predecessors, (82), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 21:05:53,339 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 137 transitions. [2022-11-02 21:05:53,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2022-11-02 21:05:53,346 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:53,347 INFO L195 NwaCegarLoop]: trace histogram [42, 42, 42, 42, 20, 20, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:53,388 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-02 21:05:53,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:53,574 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:53,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:53,574 INFO L85 PathProgramCache]: Analyzing trace with hash -577234183, now seen corresponding path program 6 times [2022-11-02 21:05:53,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:53,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778620120] [2022-11-02 21:05:53,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:53,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:54,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 21:05:54,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:54,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-11-02 21:05:54,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:54,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2022-11-02 21:05:54,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:54,497 INFO L134 CoverageAnalysis]: Checked inductivity of 3989 backedges. 0 proven. 2010 refuted. 0 times theorem prover too weak. 1979 trivial. 0 not checked. [2022-11-02 21:05:54,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:54,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778620120] [2022-11-02 21:05:54,498 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778620120] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:54,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033924612] [2022-11-02 21:05:54,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 21:05:54,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:54,499 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:54,500 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:54,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 21:05:54,746 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-02 21:05:54,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:05:54,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:05:54,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:54,814 INFO L134 CoverageAnalysis]: Checked inductivity of 3989 backedges. 1634 proven. 4 refuted. 0 times theorem prover too weak. 2351 trivial. 0 not checked. [2022-11-02 21:05:54,814 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:54,895 INFO L134 CoverageAnalysis]: Checked inductivity of 3989 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3985 trivial. 0 not checked. [2022-11-02 21:05:54,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033924612] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:05:54,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:05:54,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 5, 5] total 23 [2022-11-02 21:05:54,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041867639] [2022-11-02 21:05:54,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:54,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-02 21:05:54,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:54,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-02 21:05:54,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2022-11-02 21:05:54,899 INFO L87 Difference]: Start difference. First operand 119 states and 137 transitions. Second operand has 23 states, 23 states have (on average 4.391304347826087) internal successors, (101), 23 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 21:05:55,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:55,037 INFO L93 Difference]: Finished difference Result 209 states and 253 transitions. [2022-11-02 21:05:55,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-02 21:05:55,038 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.391304347826087) internal successors, (101), 23 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 240 [2022-11-02 21:05:55,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:55,042 INFO L225 Difference]: With dead ends: 209 [2022-11-02 21:05:55,042 INFO L226 Difference]: Without dead ends: 134 [2022-11-02 21:05:55,043 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 501 GetRequests, 480 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2022-11-02 21:05:55,043 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 96 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:55,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 115 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:05:55,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-11-02 21:05:55,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2022-11-02 21:05:55,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.1428571428571428) internal successors, (144), 126 states have internal predecessors, (144), 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 21:05:55,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 150 transitions. [2022-11-02 21:05:55,075 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 150 transitions. Word has length 240 [2022-11-02 21:05:55,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:55,075 INFO L495 AbstractCegarLoop]: Abstraction has 131 states and 150 transitions. [2022-11-02 21:05:55,075 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 4.391304347826087) internal successors, (101), 23 states have internal predecessors, (101), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-02 21:05:55,076 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 150 transitions. [2022-11-02 21:05:55,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-11-02 21:05:55,082 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:55,082 INFO L195 NwaCegarLoop]: trace histogram [45, 45, 45, 45, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:55,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:55,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 21:05:55,299 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:55,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:55,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1044531828, now seen corresponding path program 7 times [2022-11-02 21:05:55,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:55,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602785474] [2022-11-02 21:05:55,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:55,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:55,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:55,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 21:05:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:56,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-11-02 21:05:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:56,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 191 [2022-11-02 21:05:56,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:56,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4546 backedges. 0 proven. 2303 refuted. 0 times theorem prover too weak. 2243 trivial. 0 not checked. [2022-11-02 21:05:56,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:56,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602785474] [2022-11-02 21:05:56,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602785474] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:56,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497612889] [2022-11-02 21:05:56,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 21:05:56,247 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:56,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:56,249 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:56,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 21:05:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:56,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-02 21:05:56,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:56,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4546 backedges. 1864 proven. 435 refuted. 0 times theorem prover too weak. 2247 trivial. 0 not checked. [2022-11-02 21:05:56,644 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:56,979 INFO L134 CoverageAnalysis]: Checked inductivity of 4546 backedges. 0 proven. 2303 refuted. 0 times theorem prover too weak. 2243 trivial. 0 not checked. [2022-11-02 21:05:56,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497612889] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:05:56,979 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:05:56,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 22 [2022-11-02 21:05:56,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295676263] [2022-11-02 21:05:56,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:56,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 21:05:56,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:56,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 21:05:56,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-11-02 21:05:56,982 INFO L87 Difference]: Start difference. First operand 131 states and 150 transitions. Second operand has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 21:05:57,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:57,086 INFO L93 Difference]: Finished difference Result 238 states and 287 transitions. [2022-11-02 21:05:57,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:05:57,087 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) Word has length 260 [2022-11-02 21:05:57,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:57,090 INFO L225 Difference]: With dead ends: 238 [2022-11-02 21:05:57,091 INFO L226 Difference]: Without dead ends: 151 [2022-11-02 21:05:57,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 542 GetRequests, 510 SyntacticMatches, 12 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-11-02 21:05:57,092 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 105 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:57,092 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 196 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:05:57,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-11-02 21:05:57,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-11-02 21:05:57,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.1575342465753424) internal successors, (169), 146 states have internal predecessors, (169), 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 21:05:57,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 175 transitions. [2022-11-02 21:05:57,108 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 175 transitions. Word has length 260 [2022-11-02 21:05:57,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:57,108 INFO L495 AbstractCegarLoop]: Abstraction has 151 states and 175 transitions. [2022-11-02 21:05:57,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.0) internal successors, (110), 22 states have internal predecessors, (110), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 1 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-02 21:05:57,109 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 175 transitions. [2022-11-02 21:05:57,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2022-11-02 21:05:57,113 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:57,113 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 60, 20, 20, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:57,150 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:57,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 21:05:57,339 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:57,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:57,340 INFO L85 PathProgramCache]: Analyzing trace with hash 259706899, now seen corresponding path program 8 times [2022-11-02 21:05:57,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:57,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959625706] [2022-11-02 21:05:57,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:57,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:57,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:57,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 21:05:57,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:57,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-11-02 21:05:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:57,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 231 [2022-11-02 21:05:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 7711 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7675 trivial. 0 not checked. [2022-11-02 21:05:57,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:57,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959625706] [2022-11-02 21:05:57,860 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959625706] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:57,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413095898] [2022-11-02 21:05:57,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:05:57,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:57,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:57,862 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:57,891 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 21:05:58,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:05:58,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:05:58,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 1069 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-02 21:05:58,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:05:58,209 INFO L134 CoverageAnalysis]: Checked inductivity of 7711 backedges. 3290 proven. 36 refuted. 0 times theorem prover too weak. 4385 trivial. 0 not checked. [2022-11-02 21:05:58,210 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:05:58,338 INFO L134 CoverageAnalysis]: Checked inductivity of 7711 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7675 trivial. 0 not checked. [2022-11-02 21:05:58,338 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413095898] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:05:58,338 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:05:58,338 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2022-11-02 21:05:58,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519804491] [2022-11-02 21:05:58,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:05:58,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-02 21:05:58,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:05:58,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-02 21:05:58,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-11-02 21:05:58,341 INFO L87 Difference]: Start difference. First operand 151 states and 175 transitions. Second operand has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:05:58,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:05:58,393 INFO L93 Difference]: Finished difference Result 258 states and 310 transitions. [2022-11-02 21:05:58,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 21:05:58,394 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 320 [2022-11-02 21:05:58,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:05:58,395 INFO L225 Difference]: With dead ends: 258 [2022-11-02 21:05:58,395 INFO L226 Difference]: Without dead ends: 167 [2022-11-02 21:05:58,396 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 653 GetRequests, 638 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2022-11-02 21:05:58,397 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 21 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:05:58,397 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 75 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:05:58,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-11-02 21:05:58,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2022-11-02 21:05:58,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.1419753086419753) internal successors, (185), 162 states have internal predecessors, (185), 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 21:05:58,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 191 transitions. [2022-11-02 21:05:58,404 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 191 transitions. Word has length 320 [2022-11-02 21:05:58,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:05:58,406 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 191 transitions. [2022-11-02 21:05:58,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.3529411764705883) internal successors, (57), 17 states have internal predecessors, (57), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:05:58,406 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 191 transitions. [2022-11-02 21:05:58,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 337 [2022-11-02 21:05:58,438 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:05:58,438 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 60, 20, 20, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:05:58,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 21:05:58,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:58,639 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:05:58,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:05:58,639 INFO L85 PathProgramCache]: Analyzing trace with hash -849918461, now seen corresponding path program 9 times [2022-11-02 21:05:58,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:05:58,639 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655057978] [2022-11-02 21:05:58,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:05:58,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:05:58,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:59,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 21:05:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:59,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-11-02 21:05:59,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:59,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 247 [2022-11-02 21:05:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:05:59,479 INFO L134 CoverageAnalysis]: Checked inductivity of 7871 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 7675 trivial. 0 not checked. [2022-11-02 21:05:59,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:05:59,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655057978] [2022-11-02 21:05:59,480 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655057978] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:05:59,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671692432] [2022-11-02 21:05:59,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:05:59,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:05:59,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:05:59,484 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:05:59,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 21:06:01,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2022-11-02 21:06:01,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:06:01,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-02 21:06:01,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:01,821 INFO L134 CoverageAnalysis]: Checked inductivity of 7871 backedges. 3290 proven. 196 refuted. 0 times theorem prover too weak. 4385 trivial. 0 not checked. [2022-11-02 21:06:01,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:06:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 7871 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 7675 trivial. 0 not checked. [2022-11-02 21:06:02,140 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671692432] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:06:02,140 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:06:02,140 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 22 [2022-11-02 21:06:02,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124891374] [2022-11-02 21:06:02,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:06:02,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-02 21:06:02,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:06:02,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-02 21:06:02,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-11-02 21:06:02,143 INFO L87 Difference]: Start difference. First operand 167 states and 191 transitions. Second operand has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:06:02,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:06:02,214 INFO L93 Difference]: Finished difference Result 268 states and 317 transitions. [2022-11-02 21:06:02,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-11-02 21:06:02,214 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 336 [2022-11-02 21:06:02,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:06:02,216 INFO L225 Difference]: With dead ends: 268 [2022-11-02 21:06:02,216 INFO L226 Difference]: Without dead ends: 177 [2022-11-02 21:06:02,217 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 693 GetRequests, 662 SyntacticMatches, 11 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2022-11-02 21:06:02,218 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:06:02,218 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 75 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:06:02,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2022-11-02 21:06:02,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 177. [2022-11-02 21:06:02,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.1337209302325582) internal successors, (195), 172 states have internal predecessors, (195), 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 21:06:02,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 201 transitions. [2022-11-02 21:06:02,226 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 201 transitions. Word has length 336 [2022-11-02 21:06:02,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:06:02,227 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 201 transitions. [2022-11-02 21:06:02,227 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.1363636363636362) internal successors, (69), 22 states have internal predecessors, (69), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-02 21:06:02,227 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 201 transitions. [2022-11-02 21:06:02,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 347 [2022-11-02 21:06:02,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:06:02,233 INFO L195 NwaCegarLoop]: trace histogram [60, 60, 60, 60, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:06:02,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 21:06:02,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:06:02,448 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:06:02,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:06:02,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1596627961, now seen corresponding path program 10 times [2022-11-02 21:06:02,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:06:02,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438585223] [2022-11-02 21:06:02,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:06:02,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:06:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:06,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2022-11-02 21:06:06,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:07,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-11-02 21:06:07,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:08,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 257 [2022-11-02 21:06:08,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:06:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 8036 backedges. 88 proven. 4084 refuted. 0 times theorem prover too weak. 3864 trivial. 0 not checked. [2022-11-02 21:06:08,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:06:08,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438585223] [2022-11-02 21:06:08,378 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438585223] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:06:08,378 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236014398] [2022-11-02 21:06:08,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:06:08,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:06:08,379 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:06:08,384 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:06:08,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5f3815cc-989c-4084-951e-e4382a3cb98e/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 21:06:08,782 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:06:08,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:06:08,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 1160 conjuncts, 225 conjunts are in the unsatisfiable core [2022-11-02 21:06:08,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:06:09,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:06:09,326 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 21:06:09,327 INFO L173 IndexEqualityManager]: detected equality via solver [2022-11-02 21:06:09,331 INFO L356 Elim1Store]: treesize reduction 2, result has 33.3 percent of original size [2022-11-02 21:06:09,331 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 50 treesize of output 51 [2022-11-02 21:06:09,449 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:06:09,453 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:06:09,466 INFO L356 Elim1Store]: treesize reduction 17, result has 46.9 percent of original size [2022-11-02 21:06:09,466 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 42 [2022-11-02 21:06:09,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:06:09,634 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 25 treesize of output 24 [2022-11-02 21:06:09,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:06:09,722 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 25 treesize of output 24 [2022-11-02 21:06:09,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:06:09,778 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 25 treesize of output 24 [2022-11-02 21:06:09,835 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:06:09,836 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 25 treesize of output 24 [2022-11-02 21:06:09,894 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:06:09,895 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 25 treesize of output 24 [2022-11-02 21:06:09,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:06:09,956 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 25 treesize of output 24 [2022-11-02 21:06:10,017 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:06:10,018 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 25 treesize of output 24 [2022-11-02 21:06:10,078 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:06:10,079 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 25 treesize of output 24 [2022-11-02 21:06:10,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:06:10,147 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 25 treesize of output 24 [2022-11-02 21:06:10,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:06:10,213 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 25 treesize of output 24 [2022-11-02 21:06:10,279 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:06:10,280 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 25 treesize of output 24 [2022-11-02 21:06:10,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:06:10,352 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 25 treesize of output 24 [2022-11-02 21:06:10,422 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:06:10,423 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 25 treesize of output 24 [2022-11-02 21:06:10,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:06:10,496 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 25 treesize of output 24 [2022-11-02 21:06:10,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:06:10,603 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 25 treesize of output 24 [2022-11-02 21:06:10,682 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:06:10,683 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 25 treesize of output 24 [2022-11-02 21:06:10,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:06:10,756 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 25 treesize of output 24 [2022-11-02 21:06:10,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-02 21:06:10,813 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 23 treesize of output 22 [2022-11-02 21:06:34,112 INFO L134 CoverageAnalysis]: Checked inductivity of 8036 backedges. 4962 proven. 1227 refuted. 0 times theorem prover too weak. 1847 trivial. 0 not checked. [2022-11-02 21:06:34,112 INFO L328 TraceCheckSpWp]: Computing backward predicates...