./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/config/AutomizerReach.xml -i ../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF --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 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 07:29:21,762 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 07:29:21,764 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 07:29:21,820 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 07:29:21,821 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 07:29:21,826 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 07:29:21,829 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 07:29:21,833 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 07:29:21,836 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 07:29:21,843 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 07:29:21,844 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 07:29:21,846 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 07:29:21,847 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 07:29:21,850 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 07:29:21,853 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 07:29:21,858 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 07:29:21,861 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 07:29:21,862 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 07:29:21,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 07:29:21,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 07:29:21,875 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 07:29:21,877 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 07:29:21,880 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 07:29:21,881 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 07:29:21,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 07:29:21,888 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 07:29:21,888 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 07:29:21,890 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 07:29:21,891 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 07:29:21,892 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 07:29:21,893 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 07:29:21,894 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 07:29:21,896 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 07:29:21,897 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 07:29:21,899 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 07:29:21,899 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 07:29:21,900 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 07:29:21,900 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 07:29:21,901 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 07:29:21,901 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 07:29:21,902 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 07:29:21,903 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-20 07:29:21,948 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 07:29:21,951 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 07:29:21,951 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 07:29:21,952 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 07:29:21,959 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 07:29:21,959 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 07:29:21,960 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-20 07:29:21,961 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-20 07:29:21,961 INFO L138 SettingsManager]: * Use SBE=true [2021-11-20 07:29:21,961 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 07:29:21,962 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 07:29:21,963 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 07:29:21,963 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 07:29:21,963 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 07:29:21,963 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 07:29:21,964 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 07:29:21,964 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 07:29:21,964 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 07:29:21,964 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 07:29:21,964 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 07:29:21,965 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 07:29:21,965 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 07:29:21,965 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-20 07:29:21,965 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 07:29:21,966 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:29:21,966 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 07:29:21,966 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 07:29:21,966 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 07:29:21,967 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-20 07:29:21,967 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 07:29:21,967 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-20 07:29:21,967 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-20 07:29:21,968 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 07:29:21,968 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 07:29:21,968 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_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 [2021-11-20 07:29:22,211 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:29:22,232 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:29:22,234 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:29:22,235 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:29:22,236 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:29:22,238 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2021-11-20 07:29:22,303 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/data/410160b43/44f067ea72e044769b82ed93fed3d10c/FLAG692ce8b25 [2021-11-20 07:29:22,745 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:29:22,745 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2021-11-20 07:29:22,751 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/data/410160b43/44f067ea72e044769b82ed93fed3d10c/FLAG692ce8b25 [2021-11-20 07:29:23,139 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/data/410160b43/44f067ea72e044769b82ed93fed3d10c [2021-11-20 07:29:23,141 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:29:23,148 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:29:23,151 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:29:23,151 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:29:23,154 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:29:23,156 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:29:23" (1/1) ... [2021-11-20 07:29:23,158 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@28bb2f89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:23, skipping insertion in model container [2021-11-20 07:29:23,158 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:29:23" (1/1) ... [2021-11-20 07:29:23,166 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:29:23,182 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:29:23,353 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_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2021-11-20 07:29:23,355 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:29:23,364 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:29:23,379 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_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2021-11-20 07:29:23,379 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:29:23,392 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:29:23,393 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:23 WrapperNode [2021-11-20 07:29:23,393 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:29:23,394 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:29:23,394 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:29:23,394 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:29:23,402 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:23" (1/1) ... [2021-11-20 07:29:23,409 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:23" (1/1) ... [2021-11-20 07:29:23,426 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 25 [2021-11-20 07:29:23,426 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:29:23,427 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:29:23,427 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:29:23,427 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:29:23,435 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:23" (1/1) ... [2021-11-20 07:29:23,435 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:23" (1/1) ... [2021-11-20 07:29:23,436 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:23" (1/1) ... [2021-11-20 07:29:23,437 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:23" (1/1) ... [2021-11-20 07:29:23,440 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:23" (1/1) ... [2021-11-20 07:29:23,442 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:23" (1/1) ... [2021-11-20 07:29:23,443 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:23" (1/1) ... [2021-11-20 07:29:23,444 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:29:23,445 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:29:23,445 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:29:23,445 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:29:23,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:23" (1/1) ... [2021-11-20 07:29:23,454 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:29:23,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:29:23,475 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:29:23,498 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:29:23,527 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:29:23,528 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2021-11-20 07:29:23,528 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2021-11-20 07:29:23,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:29:23,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:29:23,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 07:29:23,585 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:29:23,587 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:29:23,690 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:29:23,696 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:29:23,696 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 07:29:23,698 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:29:23 BoogieIcfgContainer [2021-11-20 07:29:23,698 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:29:23,700 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:29:23,700 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:29:23,704 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:29:23,704 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:29:23" (1/3) ... [2021-11-20 07:29:23,705 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd26449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:29:23, skipping insertion in model container [2021-11-20 07:29:23,705 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:23" (2/3) ... [2021-11-20 07:29:23,706 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fd26449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:29:23, skipping insertion in model container [2021-11-20 07:29:23,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:29:23" (3/3) ... [2021-11-20 07:29:23,707 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2021-11-20 07:29:23,713 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:29:23,713 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:29:23,762 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:29:23,769 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 07:29:23,770 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:29:23,786 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:29:23,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 07:29:23,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:23,792 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:23,792 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:29:23,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:23,798 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2021-11-20 07:29:23,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-20 07:29:23,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776102093] [2021-11-20 07:29:23,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:23,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 07:29:23,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 07:29:23,903 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 07:29:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 07:29:23,939 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-11-20 07:29:23,941 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 07:29:23,942 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 07:29:23,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 07:29:23,949 INFO L732 BasicCegarLoop]: Path program histogram: [1] [2021-11-20 07:29:23,952 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 07:29:23,973 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 07:29:23 BoogieIcfgContainer [2021-11-20 07:29:23,973 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 07:29:23,974 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 07:29:23,974 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 07:29:23,974 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 07:29:23,975 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:29:23" (3/4) ... [2021-11-20 07:29:23,978 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-20 07:29:23,978 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 07:29:23,980 INFO L158 Benchmark]: Toolchain (without parser) took 831.87ms. Allocated memory is still 142.6MB. Free memory was 102.1MB in the beginning and 89.8MB in the end (delta: 12.3MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. [2021-11-20 07:29:23,980 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 142.6MB. Free memory was 118.5MB in the beginning and 118.4MB in the end (delta: 70.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:29:23,981 INFO L158 Benchmark]: CACSL2BoogieTranslator took 242.53ms. Allocated memory is still 142.6MB. Free memory was 101.9MB in the beginning and 115.7MB in the end (delta: -13.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-20 07:29:23,982 INFO L158 Benchmark]: Boogie Procedure Inliner took 31.90ms. Allocated memory is still 142.6MB. Free memory was 115.7MB in the beginning and 114.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 07:29:23,983 INFO L158 Benchmark]: Boogie Preprocessor took 17.44ms. Allocated memory is still 142.6MB. Free memory was 114.1MB in the beginning and 113.3MB in the end (delta: 735.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:29:23,983 INFO L158 Benchmark]: RCFGBuilder took 253.62ms. Allocated memory is still 142.6MB. Free memory was 112.9MB in the beginning and 104.0MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 07:29:23,984 INFO L158 Benchmark]: TraceAbstraction took 273.16ms. Allocated memory is still 142.6MB. Free memory was 103.1MB in the beginning and 90.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-20 07:29:23,985 INFO L158 Benchmark]: Witness Printer took 4.62ms. Allocated memory is still 142.6MB. Free memory was 90.5MB in the beginning and 90.3MB in the end (delta: 260.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 07:29:23,988 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 142.6MB. Free memory was 118.5MB in the beginning and 118.4MB in the end (delta: 70.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 242.53ms. Allocated memory is still 142.6MB. Free memory was 101.9MB in the beginning and 115.7MB in the end (delta: -13.8MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 31.90ms. Allocated memory is still 142.6MB. Free memory was 115.7MB in the beginning and 114.1MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.44ms. Allocated memory is still 142.6MB. Free memory was 114.1MB in the beginning and 113.3MB in the end (delta: 735.2kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 253.62ms. Allocated memory is still 142.6MB. Free memory was 112.9MB in the beginning and 104.0MB in the end (delta: 8.8MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 273.16ms. Allocated memory is still 142.6MB. Free memory was 103.1MB in the beginning and 90.5MB in the end (delta: 12.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Witness Printer took 4.62ms. Allocated memory is still 142.6MB. Free memory was 90.5MB in the beginning and 90.3MB in the end (delta: 260.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 36]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: overapproximation of shiftLeft at line 33. Possible FailurePath: [L27] int n = __VERIFIER_nondet_int(); [L28] COND FALSE !(n < 1) VAL [n=1] [L31] CALL, EXPR hanoi(n) VAL [\old(n)=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L31] RET, EXPR hanoi(n) VAL [hanoi(n)=1, n=1] [L31] unsigned result = hanoi(n); [L33] COND FALSE !(result+1>0 && result+1 == 1< main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF 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 -> 5a58a565ed7a29809aaccd8966118196fec0a697f2fc6db04cc260beeab4df83 [2021-11-20 07:29:27,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 07:29:27,050 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 07:29:27,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 07:29:27,053 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 07:29:27,054 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 07:29:27,056 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/../../sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2021-11-20 07:29:27,137 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/data/66f531f28/04888f2c48a04844bf35747759e4b274/FLAGc63bf8cb1 [2021-11-20 07:29:27,623 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 07:29:27,624 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c [2021-11-20 07:29:27,630 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/data/66f531f28/04888f2c48a04844bf35747759e4b274/FLAGc63bf8cb1 [2021-11-20 07:29:27,996 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/data/66f531f28/04888f2c48a04844bf35747759e4b274 [2021-11-20 07:29:27,998 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 07:29:27,999 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 07:29:28,001 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 07:29:28,001 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 07:29:28,005 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 07:29:28,005 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:29:27" (1/1) ... [2021-11-20 07:29:28,006 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@67b9e4b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:28, skipping insertion in model container [2021-11-20 07:29:28,007 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:29:27" (1/1) ... [2021-11-20 07:29:28,014 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 07:29:28,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 07:29:28,185 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_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2021-11-20 07:29:28,189 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:29:28,201 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 07:29:28,222 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_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/sv-benchmarks/c/bitvector-regression/recHanoi03-1.c[838,851] [2021-11-20 07:29:28,223 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 07:29:28,245 INFO L208 MainTranslator]: Completed translation [2021-11-20 07:29:28,245 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:28 WrapperNode [2021-11-20 07:29:28,246 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 07:29:28,249 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 07:29:28,249 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 07:29:28,249 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 07:29:28,256 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:28" (1/1) ... [2021-11-20 07:29:28,265 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:28" (1/1) ... [2021-11-20 07:29:28,290 INFO L137 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 24 [2021-11-20 07:29:28,290 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 07:29:28,292 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 07:29:28,292 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 07:29:28,292 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 07:29:28,300 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:28" (1/1) ... [2021-11-20 07:29:28,301 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:28" (1/1) ... [2021-11-20 07:29:28,304 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:28" (1/1) ... [2021-11-20 07:29:28,304 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:28" (1/1) ... [2021-11-20 07:29:28,318 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:28" (1/1) ... [2021-11-20 07:29:28,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:28" (1/1) ... [2021-11-20 07:29:28,329 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:28" (1/1) ... [2021-11-20 07:29:28,331 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 07:29:28,332 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 07:29:28,332 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 07:29:28,332 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 07:29:28,333 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:28" (1/1) ... [2021-11-20 07:29:28,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 07:29:28,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/z3 [2021-11-20 07:29:28,365 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 07:29:28,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 07:29:28,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 07:29:28,420 INFO L130 BoogieDeclarations]: Found specification of procedure hanoi [2021-11-20 07:29:28,420 INFO L138 BoogieDeclarations]: Found implementation of procedure hanoi [2021-11-20 07:29:28,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 07:29:28,421 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 07:29:28,421 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-20 07:29:28,491 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 07:29:28,492 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 07:29:28,599 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 07:29:28,606 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 07:29:28,606 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-20 07:29:28,608 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:29:28 BoogieIcfgContainer [2021-11-20 07:29:28,608 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 07:29:28,610 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 07:29:28,610 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 07:29:28,613 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 07:29:28,614 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:29:27" (1/3) ... [2021-11-20 07:29:28,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50607134 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:29:28, skipping insertion in model container [2021-11-20 07:29:28,615 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:29:28" (2/3) ... [2021-11-20 07:29:28,615 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@50607134 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:29:28, skipping insertion in model container [2021-11-20 07:29:28,616 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:29:28" (3/3) ... [2021-11-20 07:29:28,617 INFO L111 eAbstractionObserver]: Analyzing ICFG recHanoi03-1.c [2021-11-20 07:29:28,622 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 07:29:28,623 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-20 07:29:28,678 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 07:29:28,685 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-20 07:29:28,685 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-20 07:29:28,700 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:29:28,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-20 07:29:28,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:28,706 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:28,706 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:29:28,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:28,712 INFO L85 PathProgramCache]: Analyzing trace with hash -2087939196, now seen corresponding path program 1 times [2021-11-20 07:29:28,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:29:28,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1221945043] [2021-11-20 07:29:28,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:28,724 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:29:28,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:29:28,728 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:29:28,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-20 07:29:28,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:28,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 27 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-20 07:29:28,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:29,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:29,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-20 07:29:29,435 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:29:29,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1221945043] [2021-11-20 07:29:29,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1221945043] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-20 07:29:29,436 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-20 07:29:29,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 6] imperfect sequences [] total 11 [2021-11-20 07:29:29,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635741760] [2021-11-20 07:29:29,439 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-20 07:29:29,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-20 07:29:29,442 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:29:29,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-20 07:29:29,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-11-20 07:29:29,469 INFO L87 Difference]: Start difference. First operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:29:29,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:29,691 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-11-20 07:29:29,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-20 07:29:29,697 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 11 [2021-11-20 07:29:29,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:29,705 INFO L225 Difference]: With dead ends: 32 [2021-11-20 07:29:29,705 INFO L226 Difference]: Without dead ends: 16 [2021-11-20 07:29:29,710 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-11-20 07:29:29,715 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 22 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:29,716 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 89 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 07:29:29,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-20 07:29:29,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-11-20 07:29:29,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-20 07:29:29,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-11-20 07:29:29,765 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2021-11-20 07:29:29,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:29,766 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-11-20 07:29:29,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 9 states have internal predecessors, (15), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-20 07:29:29,767 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-11-20 07:29:29,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-20 07:29:29,769 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:29,769 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:29,784 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-20 07:29:29,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:29:29,980 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:29:29,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:29,981 INFO L85 PathProgramCache]: Analyzing trace with hash -2053638732, now seen corresponding path program 1 times [2021-11-20 07:29:29,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:29:29,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [747173799] [2021-11-20 07:29:29,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 07:29:29,983 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:29:29,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:29:29,985 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:29:29,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-20 07:29:30,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:29:30,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-20 07:29:30,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:30,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 07:29:30,269 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-20 07:29:31,014 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:29:31,014 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [747173799] [2021-11-20 07:29:31,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [747173799] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:29:31,015 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:29:31,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-11-20 07:29:31,015 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296290517] [2021-11-20 07:29:31,016 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:31,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-20 07:29:31,019 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:29:31,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-20 07:29:31,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2021-11-20 07:29:31,021 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:29:31,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:31,422 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2021-11-20 07:29:31,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-20 07:29:31,424 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 17 [2021-11-20 07:29:31,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:31,426 INFO L225 Difference]: With dead ends: 28 [2021-11-20 07:29:31,426 INFO L226 Difference]: Without dead ends: 22 [2021-11-20 07:29:31,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-11-20 07:29:31,428 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 9 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 85 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 85 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 14 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:31,428 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 62 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 85 Invalid, 0 Unknown, 14 Unchecked, 0.2s Time] [2021-11-20 07:29:31,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-20 07:29:31,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-20 07:29:31,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-20 07:29:31,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-11-20 07:29:31,435 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2021-11-20 07:29:31,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:31,437 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-11-20 07:29:31,438 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 12 states have internal predecessors, (22), 4 states have call successors, (4), 1 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2021-11-20 07:29:31,439 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-11-20 07:29:31,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-20 07:29:31,440 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:31,441 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:31,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-20 07:29:31,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:29:31,659 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:29:31,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:31,660 INFO L85 PathProgramCache]: Analyzing trace with hash -491101836, now seen corresponding path program 2 times [2021-11-20 07:29:31,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:29:31,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052222478] [2021-11-20 07:29:31,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:29:31,661 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:29:31,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:29:31,667 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:29:31,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:29:31,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:29:31,714 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-20 07:29:31,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-20 07:29:31,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:32,065 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:29:32,065 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:34,079 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 07:29:34,079 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:29:34,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052222478] [2021-11-20 07:29:34,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2052222478] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:29:34,080 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:29:34,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 26 [2021-11-20 07:29:34,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999563770] [2021-11-20 07:29:34,083 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:34,084 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-20 07:29:34,084 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:29:34,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-20 07:29:34,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-11-20 07:29:34,085 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-20 07:29:34,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:34,840 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2021-11-20 07:29:34,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 07:29:34,841 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) Word has length 29 [2021-11-20 07:29:34,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:34,842 INFO L225 Difference]: With dead ends: 34 [2021-11-20 07:29:34,842 INFO L226 Difference]: Without dead ends: 28 [2021-11-20 07:29:34,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=177, Invalid=1229, Unknown=0, NotChecked=0, Total=1406 [2021-11-20 07:29:34,845 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 25 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 56 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:34,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 124 Invalid, 252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 164 Invalid, 0 Unknown, 56 Unchecked, 0.2s Time] [2021-11-20 07:29:34,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-20 07:29:34,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-11-20 07:29:34,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-20 07:29:34,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-11-20 07:29:34,852 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 29 [2021-11-20 07:29:34,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:34,853 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-11-20 07:29:34,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.36) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (6), 1 states have call predecessors, (6), 8 states have return successors, (8), 8 states have call predecessors, (8), 6 states have call successors, (8) [2021-11-20 07:29:34,853 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-11-20 07:29:34,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-20 07:29:34,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:34,855 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:34,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-20 07:29:35,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:29:35,087 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:29:35,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:35,088 INFO L85 PathProgramCache]: Analyzing trace with hash -492655308, now seen corresponding path program 3 times [2021-11-20 07:29:35,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:29:35,089 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1897636223] [2021-11-20 07:29:35,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:29:35,089 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:29:35,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:29:35,090 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:29:35,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-20 07:29:35,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-20 07:29:35,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:29:35,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-20 07:29:35,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:35,584 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 07:29:35,584 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:39,256 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 07:29:39,256 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:29:39,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1897636223] [2021-11-20 07:29:39,257 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1897636223] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:29:39,257 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:29:39,257 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2021-11-20 07:29:39,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007700297] [2021-11-20 07:29:39,258 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:39,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-20 07:29:39,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:29:39,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-20 07:29:39,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2021-11-20 07:29:39,261 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2021-11-20 07:29:40,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:40,071 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2021-11-20 07:29:40,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-20 07:29:40,072 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) Word has length 41 [2021-11-20 07:29:40,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:40,073 INFO L225 Difference]: With dead ends: 40 [2021-11-20 07:29:40,073 INFO L226 Difference]: Without dead ends: 34 [2021-11-20 07:29:40,075 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=290, Invalid=2260, Unknown=0, NotChecked=0, Total=2550 [2021-11-20 07:29:40,076 INFO L933 BasicCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 180 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:40,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 234 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 252 Invalid, 0 Unknown, 180 Unchecked, 0.3s Time] [2021-11-20 07:29:40,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-20 07:29:40,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-20 07:29:40,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 07:29:40,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-11-20 07:29:40,084 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 41 [2021-11-20 07:29:40,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:40,089 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-11-20 07:29:40,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.3142857142857143) internal successors, (46), 24 states have internal predecessors, (46), 8 states have call successors, (8), 1 states have call predecessors, (8), 12 states have return successors, (12), 12 states have call predecessors, (12), 8 states have call successors, (12) [2021-11-20 07:29:40,090 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-11-20 07:29:40,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-20 07:29:40,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:40,092 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:40,102 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-20 07:29:40,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:29:40,293 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:29:40,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:40,293 INFO L85 PathProgramCache]: Analyzing trace with hash -1906255628, now seen corresponding path program 4 times [2021-11-20 07:29:40,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:29:40,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [181307559] [2021-11-20 07:29:40,294 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:29:40,294 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:29:40,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:29:40,298 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:29:40,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-20 07:29:40,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:29:40,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:29:40,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-20 07:29:40,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-11-20 07:29:40,882 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:45,935 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-20 07:29:45,936 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:29:45,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [181307559] [2021-11-20 07:29:45,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [181307559] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:29:45,936 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:29:45,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 27] total 46 [2021-11-20 07:29:45,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089739992] [2021-11-20 07:29:45,937 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:45,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-20 07:29:45,940 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:29:45,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-20 07:29:45,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1913, Unknown=0, NotChecked=0, Total=2070 [2021-11-20 07:29:45,944 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2021-11-20 07:29:47,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:47,617 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2021-11-20 07:29:47,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-20 07:29:47,618 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) Word has length 53 [2021-11-20 07:29:47,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:47,620 INFO L225 Difference]: With dead ends: 46 [2021-11-20 07:29:47,620 INFO L226 Difference]: Without dead ends: 40 [2021-11-20 07:29:47,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=379, Invalid=3911, Unknown=0, NotChecked=0, Total=4290 [2021-11-20 07:29:47,624 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 69 mSDsluCounter, 280 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 285 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:47,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 295 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 266 Invalid, 0 Unknown, 285 Unchecked, 0.3s Time] [2021-11-20 07:29:47,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-20 07:29:47,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-20 07:29:47,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2021-11-20 07:29:47,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-11-20 07:29:47,632 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 53 [2021-11-20 07:29:47,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:47,633 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-11-20 07:29:47,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.288888888888889) internal successors, (58), 30 states have internal predecessors, (58), 10 states have call successors, (10), 1 states have call predecessors, (10), 16 states have return successors, (16), 16 states have call predecessors, (16), 10 states have call successors, (16) [2021-11-20 07:29:47,633 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-11-20 07:29:47,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-11-20 07:29:47,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:47,635 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:47,659 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-20 07:29:47,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:29:47,849 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:29:47,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:47,850 INFO L85 PathProgramCache]: Analyzing trace with hash 788849844, now seen corresponding path program 5 times [2021-11-20 07:29:47,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:29:47,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [781248353] [2021-11-20 07:29:47,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:29:47,851 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:29:47,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:29:47,851 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:29:47,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-20 07:29:47,930 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-20 07:29:47,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:29:47,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-20 07:29:47,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-20 07:29:48,559 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:29:55,344 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-20 07:29:55,344 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:29:55,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [781248353] [2021-11-20 07:29:55,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [781248353] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:29:55,345 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:29:55,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 33] total 56 [2021-11-20 07:29:55,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882901356] [2021-11-20 07:29:55,346 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:29:55,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-20 07:29:55,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:29:55,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-20 07:29:55,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=2885, Unknown=0, NotChecked=0, Total=3080 [2021-11-20 07:29:55,349 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) [2021-11-20 07:29:56,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:29:56,778 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2021-11-20 07:29:56,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-20 07:29:56,779 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) Word has length 65 [2021-11-20 07:29:56,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:29:56,781 INFO L225 Difference]: With dead ends: 52 [2021-11-20 07:29:56,781 INFO L226 Difference]: Without dead ends: 46 [2021-11-20 07:29:56,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=554, Invalid=5608, Unknown=0, NotChecked=0, Total=6162 [2021-11-20 07:29:56,784 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 32 mSDsluCounter, 406 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 423 SdHoareTripleChecker+Invalid, 908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 449 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:29:56,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 423 Invalid, 908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 416 Invalid, 0 Unknown, 449 Unchecked, 0.4s Time] [2021-11-20 07:29:56,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-20 07:29:56,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-11-20 07:29:56,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 31 states have (on average 1.032258064516129) internal successors, (32), 32 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2021-11-20 07:29:56,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-11-20 07:29:56,793 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 65 [2021-11-20 07:29:56,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:29:56,794 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-11-20 07:29:56,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.2727272727272727) internal successors, (70), 36 states have internal predecessors, (70), 12 states have call successors, (12), 1 states have call predecessors, (12), 20 states have return successors, (20), 20 states have call predecessors, (20), 12 states have call successors, (20) [2021-11-20 07:29:56,794 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-11-20 07:29:56,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-20 07:29:56,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:29:56,797 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:29:56,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-20 07:29:57,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:29:57,012 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:29:57,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:29:57,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1302253684, now seen corresponding path program 6 times [2021-11-20 07:29:57,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:29:57,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [161508311] [2021-11-20 07:29:57,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:29:57,013 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:29:57,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:29:57,014 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:29:57,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-20 07:29:57,088 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-11-20 07:29:57,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:29:57,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-20 07:29:57,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:29:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2021-11-20 07:29:57,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:06,660 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2021-11-20 07:30:06,660 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:30:06,660 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [161508311] [2021-11-20 07:30:06,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [161508311] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:06,661 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:30:06,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 39] total 66 [2021-11-20 07:30:06,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108512121] [2021-11-20 07:30:06,661 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:06,662 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-20 07:30:06,662 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:30:06,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-20 07:30:06,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=4057, Unknown=0, NotChecked=0, Total=4290 [2021-11-20 07:30:06,665 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) [2021-11-20 07:30:08,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:08,579 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2021-11-20 07:30:08,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-20 07:30:08,583 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) Word has length 77 [2021-11-20 07:30:08,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:08,585 INFO L225 Difference]: With dead ends: 58 [2021-11-20 07:30:08,585 INFO L226 Difference]: Without dead ends: 52 [2021-11-20 07:30:08,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=710, Invalid=7846, Unknown=0, NotChecked=0, Total=8556 [2021-11-20 07:30:08,589 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 176 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 502 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 490 SdHoareTripleChecker+Invalid, 1342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 502 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 599 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:08,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 490 Invalid, 1342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 502 Invalid, 0 Unknown, 599 Unchecked, 0.4s Time] [2021-11-20 07:30:08,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-20 07:30:08,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-11-20 07:30:08,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 36 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-20 07:30:08,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-11-20 07:30:08,597 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 77 [2021-11-20 07:30:08,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:08,598 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-11-20 07:30:08,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 42 states have internal predecessors, (82), 14 states have call successors, (14), 1 states have call predecessors, (14), 24 states have return successors, (24), 24 states have call predecessors, (24), 14 states have call successors, (24) [2021-11-20 07:30:08,599 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-11-20 07:30:08,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-20 07:30:08,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:08,601 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:08,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:08,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:30:08,807 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:30:08,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:08,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1287742412, now seen corresponding path program 7 times [2021-11-20 07:30:08,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:30:08,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1495339801] [2021-11-20 07:30:08,809 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:30:08,809 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:30:08,809 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:30:08,810 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:30:08,813 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-20 07:30:08,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:30:08,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-20 07:30:08,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:09,732 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2021-11-20 07:30:09,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:21,103 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2021-11-20 07:30:21,103 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:30:21,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1495339801] [2021-11-20 07:30:21,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1495339801] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:21,104 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:30:21,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 45] total 76 [2021-11-20 07:30:21,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700356357] [2021-11-20 07:30:21,104 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:21,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-20 07:30:21,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:30:21,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-20 07:30:21,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=5429, Unknown=0, NotChecked=0, Total=5700 [2021-11-20 07:30:21,107 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) [2021-11-20 07:30:23,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:23,458 INFO L93 Difference]: Finished difference Result 64 states and 66 transitions. [2021-11-20 07:30:23,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-20 07:30:23,458 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) Word has length 89 [2021-11-20 07:30:23,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:23,460 INFO L225 Difference]: With dead ends: 64 [2021-11-20 07:30:23,460 INFO L226 Difference]: Without dead ends: 58 [2021-11-20 07:30:23,464 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=882, Invalid=10460, Unknown=0, NotChecked=0, Total=11342 [2021-11-20 07:30:23,465 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 253 mSDsluCounter, 685 mSDsCounter, 0 mSdLazyCounter, 759 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 706 SdHoareTripleChecker+Invalid, 1972 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 807 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:23,465 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 706 Invalid, 1972 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 759 Invalid, 0 Unknown, 807 Unchecked, 0.5s Time] [2021-11-20 07:30:23,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-20 07:30:23,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-11-20 07:30:23,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 40 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2021-11-20 07:30:23,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-11-20 07:30:23,474 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 89 [2021-11-20 07:30:23,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:23,474 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-11-20 07:30:23,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 1.2533333333333334) internal successors, (94), 48 states have internal predecessors, (94), 16 states have call successors, (16), 1 states have call predecessors, (16), 28 states have return successors, (28), 28 states have call predecessors, (28), 16 states have call successors, (28) [2021-11-20 07:30:23,475 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-11-20 07:30:23,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-20 07:30:23,477 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:23,477 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:23,489 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-20 07:30:23,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:30:23,683 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:30:23,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:23,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1760839668, now seen corresponding path program 8 times [2021-11-20 07:30:23,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:30:23,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1860177956] [2021-11-20 07:30:23,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:30:23,684 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:30:23,685 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:30:23,685 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:30:23,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-20 07:30:23,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:30:23,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:23,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-20 07:30:23,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-11-20 07:30:24,784 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:30:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-20 07:30:38,601 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:30:38,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1860177956] [2021-11-20 07:30:38,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1860177956] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:30:38,601 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:30:38,601 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 51] total 86 [2021-11-20 07:30:38,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537961873] [2021-11-20 07:30:38,602 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:30:38,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-11-20 07:30:38,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:30:38,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-11-20 07:30:38,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=7001, Unknown=0, NotChecked=0, Total=7310 [2021-11-20 07:30:38,605 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) [2021-11-20 07:30:42,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:30:42,382 INFO L93 Difference]: Finished difference Result 70 states and 72 transitions. [2021-11-20 07:30:42,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-20 07:30:42,383 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) Word has length 101 [2021-11-20 07:30:42,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:30:42,384 INFO L225 Difference]: With dead ends: 70 [2021-11-20 07:30:42,385 INFO L226 Difference]: Without dead ends: 64 [2021-11-20 07:30:42,388 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1943 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=646, Invalid=14116, Unknown=0, NotChecked=0, Total=14762 [2021-11-20 07:30:42,388 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 62 mSDsluCounter, 907 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 1396 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 838 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:30:42,389 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 930 Invalid, 1396 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 467 Invalid, 0 Unknown, 838 Unchecked, 0.5s Time] [2021-11-20 07:30:42,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-20 07:30:42,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-11-20 07:30:42,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 44 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2021-11-20 07:30:42,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2021-11-20 07:30:42,398 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 101 [2021-11-20 07:30:42,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:30:42,398 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2021-11-20 07:30:42,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 54 states have internal predecessors, (106), 18 states have call successors, (18), 1 states have call predecessors, (18), 32 states have return successors, (32), 32 states have call predecessors, (32), 18 states have call successors, (32) [2021-11-20 07:30:42,399 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2021-11-20 07:30:42,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-20 07:30:42,401 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:30:42,401 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:30:42,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (10)] Ended with exit code 0 [2021-11-20 07:30:42,612 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:30:42,613 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:30:42,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:30:42,613 INFO L85 PathProgramCache]: Analyzing trace with hash -1211116620, now seen corresponding path program 9 times [2021-11-20 07:30:42,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:30:42,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2004023484] [2021-11-20 07:30:42,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:30:42,614 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:30:42,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:30:42,615 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:30:42,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-20 07:30:42,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-11-20 07:30:42,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:30:42,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-20 07:30:42,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:30:43,992 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2021-11-20 07:30:43,993 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:31:01,108 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2021-11-20 07:31:01,108 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:31:01,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2004023484] [2021-11-20 07:31:01,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2004023484] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:31:01,109 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:31:01,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 57] total 96 [2021-11-20 07:31:01,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264893434] [2021-11-20 07:31:01,109 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:31:01,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-20 07:31:01,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:31:01,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-20 07:31:01,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=8773, Unknown=0, NotChecked=0, Total=9120 [2021-11-20 07:31:01,111 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) [2021-11-20 07:31:06,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:31:06,067 INFO L93 Difference]: Finished difference Result 76 states and 78 transitions. [2021-11-20 07:31:06,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-20 07:31:06,067 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) Word has length 113 [2021-11-20 07:31:06,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:31:06,069 INFO L225 Difference]: With dead ends: 76 [2021-11-20 07:31:06,069 INFO L226 Difference]: Without dead ends: 70 [2021-11-20 07:31:06,071 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2424 ImplicationChecksByTransitivity, 14.0s TimeCoverageRelationStatistics Valid=879, Invalid=17481, Unknown=0, NotChecked=0, Total=18360 [2021-11-20 07:31:06,072 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 128 mSDsluCounter, 1132 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 2340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1028 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-20 07:31:06,072 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 1157 Invalid, 2340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 1098 Invalid, 0 Unknown, 1028 Unchecked, 0.7s Time] [2021-11-20 07:31:06,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-20 07:31:06,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-11-20 07:31:06,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 48 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2021-11-20 07:31:06,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2021-11-20 07:31:06,082 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 113 [2021-11-20 07:31:06,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:31:06,083 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2021-11-20 07:31:06,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 1.2421052631578948) internal successors, (118), 60 states have internal predecessors, (118), 20 states have call successors, (20), 1 states have call predecessors, (20), 36 states have return successors, (36), 36 states have call predecessors, (36), 20 states have call successors, (36) [2021-11-20 07:31:06,084 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2021-11-20 07:31:06,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-20 07:31:06,086 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:31:06,086 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:31:06,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-20 07:31:06,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:31:06,294 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:31:06,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:31:06,295 INFO L85 PathProgramCache]: Analyzing trace with hash 685850484, now seen corresponding path program 10 times [2021-11-20 07:31:06,295 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:31:06,295 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [834399247] [2021-11-20 07:31:06,295 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:31:06,295 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:31:06,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:31:06,296 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:31:06,297 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-20 07:31:06,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:31:06,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:31:06,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-20 07:31:06,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:31:07,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2021-11-20 07:31:07,835 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:31:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2021-11-20 07:31:29,446 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:31:29,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [834399247] [2021-11-20 07:31:29,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [834399247] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:31:29,446 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:31:29,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 63] total 106 [2021-11-20 07:31:29,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855308065] [2021-11-20 07:31:29,447 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:31:29,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-11-20 07:31:29,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:31:29,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-11-20 07:31:29,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=10745, Unknown=0, NotChecked=0, Total=11130 [2021-11-20 07:31:29,450 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 106 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 66 states have internal predecessors, (130), 22 states have call successors, (22), 1 states have call predecessors, (22), 40 states have return successors, (40), 40 states have call predecessors, (40), 22 states have call successors, (40) [2021-11-20 07:31:38,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:31:38,305 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2021-11-20 07:31:38,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-20 07:31:38,306 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 66 states have internal predecessors, (130), 22 states have call successors, (22), 1 states have call predecessors, (22), 40 states have return successors, (40), 40 states have call predecessors, (40), 22 states have call successors, (40) Word has length 125 [2021-11-20 07:31:38,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:31:38,307 INFO L225 Difference]: With dead ends: 83 [2021-11-20 07:31:38,308 INFO L226 Difference]: Without dead ends: 77 [2021-11-20 07:31:38,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2993 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=1246, Invalid=21404, Unknown=0, NotChecked=0, Total=22650 [2021-11-20 07:31:38,311 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 327 mSDsluCounter, 1410 mSDsCounter, 0 mSdLazyCounter, 1459 mSolverCounterSat, 556 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 1437 SdHoareTripleChecker+Invalid, 3551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 556 IncrementalHoareTripleChecker+Valid, 1459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1536 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-20 07:31:38,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 1437 Invalid, 3551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [556 Valid, 1459 Invalid, 0 Unknown, 1536 Unchecked, 1.1s Time] [2021-11-20 07:31:38,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-11-20 07:31:38,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2021-11-20 07:31:38,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 52 states have internal predecessors, (52), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (23), 22 states have call predecessors, (23), 2 states have call successors, (23) [2021-11-20 07:31:38,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2021-11-20 07:31:38,320 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 125 [2021-11-20 07:31:38,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:31:38,321 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2021-11-20 07:31:38,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 105 states have (on average 1.2380952380952381) internal successors, (130), 66 states have internal predecessors, (130), 22 states have call successors, (22), 1 states have call predecessors, (22), 40 states have return successors, (40), 40 states have call predecessors, (40), 22 states have call successors, (40) [2021-11-20 07:31:38,321 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2021-11-20 07:31:38,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-20 07:31:38,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:31:38,324 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:31:38,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-20 07:31:38,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:31:38,538 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:31:38,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:31:38,538 INFO L85 PathProgramCache]: Analyzing trace with hash -2059891916, now seen corresponding path program 11 times [2021-11-20 07:31:38,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:31:38,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [24986774] [2021-11-20 07:31:38,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:31:38,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:31:38,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:31:38,540 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:31:38,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-20 07:31:38,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-11-20 07:31:38,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:31:38,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-20 07:31:38,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:31:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2021-11-20 07:31:40,306 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:32:06,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 0 proven. 1113 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2021-11-20 07:32:06,457 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:32:06,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [24986774] [2021-11-20 07:32:06,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [24986774] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:32:06,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:32:06,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 69] total 116 [2021-11-20 07:32:06,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413931981] [2021-11-20 07:32:06,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:32:06,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-11-20 07:32:06,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:32:06,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-11-20 07:32:06,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=12917, Unknown=0, NotChecked=0, Total=13340 [2021-11-20 07:32:06,460 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 116 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 72 states have internal predecessors, (142), 24 states have call successors, (24), 1 states have call predecessors, (24), 44 states have return successors, (44), 44 states have call predecessors, (44), 24 states have call successors, (44) [2021-11-20 07:32:11,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:32:11,293 INFO L93 Difference]: Finished difference Result 88 states and 90 transitions. [2021-11-20 07:32:11,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-20 07:32:11,293 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 72 states have internal predecessors, (142), 24 states have call successors, (24), 1 states have call predecessors, (24), 44 states have return successors, (44), 44 states have call predecessors, (44), 24 states have call successors, (44) Word has length 137 [2021-11-20 07:32:11,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:32:11,294 INFO L225 Difference]: With dead ends: 88 [2021-11-20 07:32:11,294 INFO L226 Difference]: Without dead ends: 82 [2021-11-20 07:32:11,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 342 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3475 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=1730, Invalid=24676, Unknown=0, NotChecked=0, Total=26406 [2021-11-20 07:32:11,297 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 495 mSDsluCounter, 1607 mSDsCounter, 0 mSdLazyCounter, 1394 mSolverCounterSat, 824 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 522 SdHoareTripleChecker+Valid, 1636 SdHoareTripleChecker+Invalid, 4171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 824 IncrementalHoareTripleChecker+Valid, 1394 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1953 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:32:11,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [522 Valid, 1636 Invalid, 4171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [824 Valid, 1394 Invalid, 0 Unknown, 1953 Unchecked, 0.9s Time] [2021-11-20 07:32:11,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-20 07:32:11,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-11-20 07:32:11,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 55 states have (on average 1.018181818181818) internal successors, (56), 56 states have internal predecessors, (56), 2 states have call successors, (2), 1 states have call predecessors, (2), 24 states have return successors, (25), 24 states have call predecessors, (25), 2 states have call successors, (25) [2021-11-20 07:32:11,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2021-11-20 07:32:11,306 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 137 [2021-11-20 07:32:11,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:32:11,307 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2021-11-20 07:32:11,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 115 states have (on average 1.2347826086956522) internal successors, (142), 72 states have internal predecessors, (142), 24 states have call successors, (24), 1 states have call predecessors, (24), 44 states have return successors, (44), 44 states have call predecessors, (44), 24 states have call successors, (44) [2021-11-20 07:32:11,308 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2021-11-20 07:32:11,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-20 07:32:11,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:32:11,310 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:32:11,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-20 07:32:11,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:32:11,522 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:32:11,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:32:11,523 INFO L85 PathProgramCache]: Analyzing trace with hash -706365708, now seen corresponding path program 12 times [2021-11-20 07:32:11,523 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:32:11,523 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1224302262] [2021-11-20 07:32:11,523 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-20 07:32:11,523 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:32:11,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:32:11,524 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:32:11,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-20 07:32:11,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-11-20 07:32:11,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:32:11,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-20 07:32:11,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:32:13,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-11-20 07:32:13,674 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:32:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1610 backedges. 0 proven. 1334 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2021-11-20 07:32:44,682 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:32:44,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1224302262] [2021-11-20 07:32:44,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1224302262] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:32:44,682 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:32:44,682 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 75] total 126 [2021-11-20 07:32:44,682 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230424713] [2021-11-20 07:32:44,682 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:32:44,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2021-11-20 07:32:44,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:32:44,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-11-20 07:32:44,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=461, Invalid=15289, Unknown=0, NotChecked=0, Total=15750 [2021-11-20 07:32:44,685 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 126 states, 125 states have (on average 1.232) internal successors, (154), 78 states have internal predecessors, (154), 26 states have call successors, (26), 1 states have call predecessors, (26), 48 states have return successors, (48), 48 states have call predecessors, (48), 26 states have call successors, (48) [2021-11-20 07:32:54,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:32:54,215 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2021-11-20 07:32:54,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-20 07:32:54,215 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 125 states have (on average 1.232) internal successors, (154), 78 states have internal predecessors, (154), 26 states have call successors, (26), 1 states have call predecessors, (26), 48 states have return successors, (48), 48 states have call predecessors, (48), 26 states have call successors, (48) Word has length 149 [2021-11-20 07:32:54,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:32:54,217 INFO L225 Difference]: With dead ends: 89 [2021-11-20 07:32:54,217 INFO L226 Difference]: Without dead ends: 85 [2021-11-20 07:32:54,218 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3954 ImplicationChecksByTransitivity, 27.1s TimeCoverageRelationStatistics Valid=1263, Invalid=28839, Unknown=0, NotChecked=0, Total=30102 [2021-11-20 07:32:54,219 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 284 mSDsluCounter, 1942 mSDsCounter, 0 mSdLazyCounter, 1354 mSolverCounterSat, 479 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 1973 SdHoareTripleChecker+Invalid, 3669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 479 IncrementalHoareTripleChecker+Valid, 1354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1836 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:32:54,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 1973 Invalid, 3669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [479 Valid, 1354 Invalid, 0 Unknown, 1836 Unchecked, 0.9s Time] [2021-11-20 07:32:54,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-20 07:32:54,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-11-20 07:32:54,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 58 states have internal predecessors, (58), 2 states have call successors, (2), 1 states have call predecessors, (2), 25 states have return successors, (26), 25 states have call predecessors, (26), 2 states have call successors, (26) [2021-11-20 07:32:54,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2021-11-20 07:32:54,228 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 149 [2021-11-20 07:32:54,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:32:54,228 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2021-11-20 07:32:54,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 125 states have (on average 1.232) internal successors, (154), 78 states have internal predecessors, (154), 26 states have call successors, (26), 1 states have call predecessors, (26), 48 states have return successors, (48), 48 states have call predecessors, (48), 26 states have call successors, (48) [2021-11-20 07:32:54,229 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2021-11-20 07:32:54,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-20 07:32:54,231 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:32:54,232 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:32:54,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-20 07:32:54,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:32:54,444 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:32:54,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:32:54,444 INFO L85 PathProgramCache]: Analyzing trace with hash -341184380, now seen corresponding path program 13 times [2021-11-20 07:32:54,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:32:54,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2073751612] [2021-11-20 07:32:54,444 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-20 07:32:54,445 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:32:54,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:32:54,446 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:32:54,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-20 07:32:54,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 07:32:54,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-20 07:32:54,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:32:56,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2021-11-20 07:32:56,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:33:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1752 backedges. 0 proven. 1452 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2021-11-20 07:33:30,261 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:33:30,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2073751612] [2021-11-20 07:33:30,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2073751612] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:33:30,261 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:33:30,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 78] total 131 [2021-11-20 07:33:30,262 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878826986] [2021-11-20 07:33:30,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:33:30,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-11-20 07:33:30,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:33:30,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-11-20 07:33:30,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=16550, Unknown=0, NotChecked=0, Total=17030 [2021-11-20 07:33:30,264 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 131 states, 130 states have (on average 1.2307692307692308) internal successors, (160), 81 states have internal predecessors, (160), 27 states have call successors, (27), 1 states have call predecessors, (27), 50 states have return successors, (50), 50 states have call predecessors, (50), 27 states have call successors, (50) [2021-11-20 07:33:36,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:33:36,300 INFO L93 Difference]: Finished difference Result 97 states and 99 transitions. [2021-11-20 07:33:36,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-20 07:33:36,301 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 130 states have (on average 1.2307692307692308) internal successors, (160), 81 states have internal predecessors, (160), 27 states have call successors, (27), 1 states have call predecessors, (27), 50 states have return successors, (50), 50 states have call predecessors, (50), 27 states have call successors, (50) Word has length 155 [2021-11-20 07:33:36,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:33:36,303 INFO L225 Difference]: With dead ends: 97 [2021-11-20 07:33:36,303 INFO L226 Difference]: Without dead ends: 91 [2021-11-20 07:33:36,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4435 ImplicationChecksByTransitivity, 25.1s TimeCoverageRelationStatistics Valid=2114, Invalid=31558, Unknown=0, NotChecked=0, Total=33672 [2021-11-20 07:33:36,307 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 348 mSDsluCounter, 1775 mSDsCounter, 0 mSdLazyCounter, 1447 mSolverCounterSat, 490 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 1807 SdHoareTripleChecker+Invalid, 4506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 490 IncrementalHoareTripleChecker+Valid, 1447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2569 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-20 07:33:36,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 1807 Invalid, 4506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [490 Valid, 1447 Invalid, 0 Unknown, 2569 Unchecked, 0.9s Time] [2021-11-20 07:33:36,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-20 07:33:36,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-11-20 07:33:36,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 62 states have internal predecessors, (62), 2 states have call successors, (2), 1 states have call predecessors, (2), 27 states have return successors, (28), 27 states have call predecessors, (28), 2 states have call successors, (28) [2021-11-20 07:33:36,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2021-11-20 07:33:36,315 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 155 [2021-11-20 07:33:36,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:33:36,316 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2021-11-20 07:33:36,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 130 states have (on average 1.2307692307692308) internal successors, (160), 81 states have internal predecessors, (160), 27 states have call successors, (27), 1 states have call predecessors, (27), 50 states have return successors, (50), 50 states have call predecessors, (50), 27 states have call successors, (50) [2021-11-20 07:33:36,317 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2021-11-20 07:33:36,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2021-11-20 07:33:36,320 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:33:36,320 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:33:36,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-20 07:33:36,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:33:36,538 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:33:36,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:33:36,538 INFO L85 PathProgramCache]: Analyzing trace with hash 600795204, now seen corresponding path program 14 times [2021-11-20 07:33:36,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:33:36,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1177393439] [2021-11-20 07:33:36,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-20 07:33:36,539 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:33:36,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:33:36,540 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:33:36,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-20 07:33:36,852 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-20 07:33:36,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:33:36,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-20 07:33:36,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:33:39,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1027 trivial. 0 not checked. [2021-11-20 07:33:39,216 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:34:20,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2054 backedges. 0 proven. 1703 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2021-11-20 07:34:20,772 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:34:20,773 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1177393439] [2021-11-20 07:34:20,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1177393439] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:34:20,773 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:34:20,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 84] total 141 [2021-11-20 07:34:20,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447988823] [2021-11-20 07:34:20,773 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:34:20,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2021-11-20 07:34:20,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:34:20,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2021-11-20 07:34:20,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=19222, Unknown=0, NotChecked=0, Total=19740 [2021-11-20 07:34:20,777 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 141 states, 140 states have (on average 1.2285714285714286) internal successors, (172), 87 states have internal predecessors, (172), 29 states have call successors, (29), 1 states have call predecessors, (29), 54 states have return successors, (54), 54 states have call predecessors, (54), 29 states have call successors, (54) [2021-11-20 07:34:35,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:34:35,977 INFO L93 Difference]: Finished difference Result 103 states and 105 transitions. [2021-11-20 07:34:35,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-20 07:34:35,979 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 140 states have (on average 1.2285714285714286) internal successors, (172), 87 states have internal predecessors, (172), 29 states have call successors, (29), 1 states have call predecessors, (29), 54 states have return successors, (54), 54 states have call predecessors, (54), 29 states have call successors, (54) Word has length 167 [2021-11-20 07:34:35,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:34:35,980 INFO L225 Difference]: With dead ends: 103 [2021-11-20 07:34:35,980 INFO L226 Difference]: Without dead ends: 97 [2021-11-20 07:34:35,984 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 405 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5200 ImplicationChecksByTransitivity, 38.8s TimeCoverageRelationStatistics Valid=1630, Invalid=37772, Unknown=0, NotChecked=0, Total=39402 [2021-11-20 07:34:35,985 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 391 mSDsluCounter, 2634 mSDsCounter, 0 mSdLazyCounter, 1590 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 2668 SdHoareTripleChecker+Invalid, 4971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 1590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 2673 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-20 07:34:35,985 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 2668 Invalid, 4971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [708 Valid, 1590 Invalid, 0 Unknown, 2673 Unchecked, 1.3s Time] [2021-11-20 07:34:35,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-11-20 07:34:35,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-11-20 07:34:35,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 66 states have internal predecessors, (66), 2 states have call successors, (2), 1 states have call predecessors, (2), 29 states have return successors, (30), 29 states have call predecessors, (30), 2 states have call successors, (30) [2021-11-20 07:34:35,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2021-11-20 07:34:35,994 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 167 [2021-11-20 07:34:35,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:34:35,995 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2021-11-20 07:34:35,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 140 states have (on average 1.2285714285714286) internal successors, (172), 87 states have internal predecessors, (172), 29 states have call successors, (29), 1 states have call predecessors, (29), 54 states have return successors, (54), 54 states have call predecessors, (54), 29 states have call successors, (54) [2021-11-20 07:34:35,996 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2021-11-20 07:34:35,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-20 07:34:35,998 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:34:35,998 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:34:36,027 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-20 07:34:36,231 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:34:36,232 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:34:36,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:34:36,232 INFO L85 PathProgramCache]: Analyzing trace with hash -454705148, now seen corresponding path program 15 times [2021-11-20 07:34:36,233 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:34:36,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1182902418] [2021-11-20 07:34:36,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 07:34:36,233 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:34:36,233 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:34:36,234 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:34:36,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-20 07:34:36,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 29 check-sat command(s) [2021-11-20 07:34:36,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:34:36,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 120 conjunts are in the unsatisfiable core [2021-11-20 07:34:36,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:34:39,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1190 trivial. 0 not checked. [2021-11-20 07:34:39,467 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:35:29,241 INFO L134 CoverageAnalysis]: Checked inductivity of 2380 backedges. 0 proven. 1974 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2021-11-20 07:35:29,242 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:35:29,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1182902418] [2021-11-20 07:35:29,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1182902418] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:35:29,242 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:35:29,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 90] total 151 [2021-11-20 07:35:29,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964545113] [2021-11-20 07:35:29,242 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:35:29,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2021-11-20 07:35:29,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:35:29,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2021-11-20 07:35:29,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=556, Invalid=22094, Unknown=0, NotChecked=0, Total=22650 [2021-11-20 07:35:29,246 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 151 states, 150 states have (on average 1.2266666666666666) internal successors, (184), 93 states have internal predecessors, (184), 31 states have call successors, (31), 1 states have call predecessors, (31), 58 states have return successors, (58), 58 states have call predecessors, (58), 31 states have call successors, (58) [2021-11-20 07:35:41,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:35:41,659 INFO L93 Difference]: Finished difference Result 107 states and 109 transitions. [2021-11-20 07:35:41,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-20 07:35:41,660 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 150 states have (on average 1.2266666666666666) internal successors, (184), 93 states have internal predecessors, (184), 31 states have call successors, (31), 1 states have call predecessors, (31), 58 states have return successors, (58), 58 states have call predecessors, (58), 31 states have call successors, (58) Word has length 179 [2021-11-20 07:35:41,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:35:41,662 INFO L225 Difference]: With dead ends: 107 [2021-11-20 07:35:41,662 INFO L226 Difference]: Without dead ends: 103 [2021-11-20 07:35:41,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5759 ImplicationChecksByTransitivity, 40.4s TimeCoverageRelationStatistics Valid=2485, Invalid=40987, Unknown=0, NotChecked=0, Total=43472 [2021-11-20 07:35:41,665 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 719 mSDsluCounter, 2860 mSDsCounter, 0 mSdLazyCounter, 2123 mSolverCounterSat, 1050 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 743 SdHoareTripleChecker+Valid, 2896 SdHoareTripleChecker+Invalid, 6389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1050 IncrementalHoareTripleChecker+Valid, 2123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3216 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2021-11-20 07:35:41,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [743 Valid, 2896 Invalid, 6389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1050 Valid, 2123 Invalid, 0 Unknown, 3216 Unchecked, 1.5s Time] [2021-11-20 07:35:41,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-20 07:35:41,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 100. [2021-11-20 07:35:41,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 68 states have internal predecessors, (68), 2 states have call successors, (2), 1 states have call predecessors, (2), 30 states have return successors, (31), 30 states have call predecessors, (31), 2 states have call successors, (31) [2021-11-20 07:35:41,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2021-11-20 07:35:41,674 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 179 [2021-11-20 07:35:41,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:35:41,675 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2021-11-20 07:35:41,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 150 states have (on average 1.2266666666666666) internal successors, (184), 93 states have internal predecessors, (184), 31 states have call successors, (31), 1 states have call predecessors, (31), 58 states have return successors, (58), 58 states have call predecessors, (58), 31 states have call successors, (58) [2021-11-20 07:35:41,676 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2021-11-20 07:35:41,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-20 07:35:41,678 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:35:41,678 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:35:41,696 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-20 07:35:41,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:35:41,891 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:35:41,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:35:41,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1668253132, now seen corresponding path program 16 times [2021-11-20 07:35:41,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:35:41,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1356863372] [2021-11-20 07:35:41,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 07:35:41,893 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:35:41,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:35:41,894 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:35:41,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-20 07:35:42,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 07:35:42,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 07:35:42,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 124 conjunts are in the unsatisfiable core [2021-11-20 07:35:42,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 07:35:45,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 1276 trivial. 0 not checked. [2021-11-20 07:35:45,249 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 07:36:39,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2552 backedges. 0 proven. 2117 refuted. 0 times theorem prover too weak. 435 trivial. 0 not checked. [2021-11-20 07:36:39,781 INFO L139 FreeRefinementEngine]: Strategy WOLF found an infeasible trace [2021-11-20 07:36:39,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1356863372] [2021-11-20 07:36:39,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1356863372] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 07:36:39,781 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 07:36:39,781 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 93] total 156 [2021-11-20 07:36:39,781 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292932368] [2021-11-20 07:36:39,781 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 07:36:39,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2021-11-20 07:36:39,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WOLF [2021-11-20 07:36:39,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2021-11-20 07:36:39,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=23605, Unknown=0, NotChecked=0, Total=24180 [2021-11-20 07:36:39,785 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 156 states, 155 states have (on average 1.2258064516129032) internal successors, (190), 96 states have internal predecessors, (190), 32 states have call successors, (32), 1 states have call predecessors, (32), 60 states have return successors, (60), 60 states have call predecessors, (60), 32 states have call successors, (60) [2021-11-20 07:36:58,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 07:36:58,870 INFO L93 Difference]: Finished difference Result 112 states and 114 transitions. [2021-11-20 07:36:58,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-20 07:36:58,872 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 155 states have (on average 1.2258064516129032) internal successors, (190), 96 states have internal predecessors, (190), 32 states have call successors, (32), 1 states have call predecessors, (32), 60 states have return successors, (60), 60 states have call predecessors, (60), 32 states have call successors, (60) Word has length 185 [2021-11-20 07:36:58,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 07:36:58,874 INFO L225 Difference]: With dead ends: 112 [2021-11-20 07:36:58,874 INFO L226 Difference]: Without dead ends: 106 [2021-11-20 07:36:58,878 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 452 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 218 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6378 ImplicationChecksByTransitivity, 50.0s TimeCoverageRelationStatistics Valid=2296, Invalid=45884, Unknown=0, NotChecked=0, Total=48180 [2021-11-20 07:36:58,879 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 609 mSDsluCounter, 2970 mSDsCounter, 0 mSdLazyCounter, 2709 mSolverCounterSat, 1081 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 3007 SdHoareTripleChecker+Invalid, 7214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1081 IncrementalHoareTripleChecker+Valid, 2709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 3424 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-20 07:36:58,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [621 Valid, 3007 Invalid, 7214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1081 Valid, 2709 Invalid, 0 Unknown, 3424 Unchecked, 2.0s Time] [2021-11-20 07:36:58,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-20 07:36:58,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-11-20 07:36:58,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 72 states have internal predecessors, (72), 2 states have call successors, (2), 1 states have call predecessors, (2), 32 states have return successors, (33), 32 states have call predecessors, (33), 2 states have call successors, (33) [2021-11-20 07:36:58,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2021-11-20 07:36:58,887 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 185 [2021-11-20 07:36:58,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 07:36:58,887 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2021-11-20 07:36:58,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 155 states have (on average 1.2258064516129032) internal successors, (190), 96 states have internal predecessors, (190), 32 states have call successors, (32), 1 states have call predecessors, (32), 60 states have return successors, (60), 60 states have call predecessors, (60), 32 states have call successors, (60) [2021-11-20 07:36:58,888 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2021-11-20 07:36:58,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2021-11-20 07:36:58,890 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 07:36:58,891 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 07:36:58,918 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-20 07:36:59,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:36:59,104 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 07:36:59,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 07:36:59,105 INFO L85 PathProgramCache]: Analyzing trace with hash 422913524, now seen corresponding path program 17 times [2021-11-20 07:36:59,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy WOLF [2021-11-20 07:36:59,106 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2071788466] [2021-11-20 07:36:59,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-20 07:36:59,106 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-20 07:36:59,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat [2021-11-20 07:36:59,107 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-20 07:36:59,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-20 07:36:59,702 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2021-11-20 07:36:59,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is sat [2021-11-20 07:36:59,702 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-20 07:36:59,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-20 07:36:59,914 INFO L133 FreeRefinementEngine]: Strategy WOLF found a feasible trace [2021-11-20 07:36:59,915 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-20 07:36:59,916 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2021-11-20 07:36:59,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-20 07:37:00,134 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/mathsat -unsat_core_generation=3 [2021-11-20 07:37:00,139 INFO L732 BasicCegarLoop]: Path program histogram: [17, 1] [2021-11-20 07:37:00,144 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-20 07:37:00,254 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.11 07:37:00 BoogieIcfgContainer [2021-11-20 07:37:00,255 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-20 07:37:00,255 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-20 07:37:00,255 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-20 07:37:00,256 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-20 07:37:00,256 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:29:28" (3/4) ... [2021-11-20 07:37:00,259 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-20 07:37:00,368 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2ee26ae0-ad1d-4fce-8745-e8fa3aa20195/bin/uautomizer-DQz5hQGWxF/witness.graphml [2021-11-20 07:37:00,368 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-20 07:37:00,369 INFO L158 Benchmark]: Toolchain (without parser) took 452369.72ms. Allocated memory was 54.5MB in the beginning and 251.7MB in the end (delta: 197.1MB). Free memory was 31.4MB in the beginning and 98.6MB in the end (delta: -67.2MB). Peak memory consumption was 129.2MB. Max. memory is 16.1GB. [2021-11-20 07:37:00,370 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 54.5MB. Free memory was 34.8MB in the beginning and 34.8MB in the end (delta: 37.6kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:37:00,370 INFO L158 Benchmark]: CACSL2BoogieTranslator took 245.11ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 31.2MB in the beginning and 51.4MB in the end (delta: -20.2MB). Peak memory consumption was 8.3MB. Max. memory is 16.1GB. [2021-11-20 07:37:00,371 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.59ms. Allocated memory is still 67.1MB. Free memory was 51.4MB in the beginning and 50.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-20 07:37:00,371 INFO L158 Benchmark]: Boogie Preprocessor took 39.46ms. Allocated memory is still 67.1MB. Free memory was 50.0MB in the beginning and 49.0MB in the end (delta: 996.8kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-20 07:37:00,372 INFO L158 Benchmark]: RCFGBuilder took 276.55ms. Allocated memory is still 67.1MB. Free memory was 48.9MB in the beginning and 40.4MB in the end (delta: 8.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-20 07:37:00,372 INFO L158 Benchmark]: TraceAbstraction took 451644.53ms. Allocated memory was 67.1MB in the beginning and 251.7MB in the end (delta: 184.5MB). Free memory was 40.0MB in the beginning and 102.8MB in the end (delta: -62.8MB). Peak memory consumption was 123.0MB. Max. memory is 16.1GB. [2021-11-20 07:37:00,373 INFO L158 Benchmark]: Witness Printer took 113.35ms. Allocated memory is still 251.7MB. Free memory was 102.8MB in the beginning and 98.6MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-20 07:37:00,376 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 54.5MB. Free memory was 34.8MB in the beginning and 34.8MB in the end (delta: 37.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 245.11ms. Allocated memory was 54.5MB in the beginning and 67.1MB in the end (delta: 12.6MB). Free memory was 31.2MB in the beginning and 51.4MB in the end (delta: -20.2MB). Peak memory consumption was 8.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.59ms. Allocated memory is still 67.1MB. Free memory was 51.4MB in the beginning and 50.0MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 39.46ms. Allocated memory is still 67.1MB. Free memory was 50.0MB in the beginning and 49.0MB in the end (delta: 996.8kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 276.55ms. Allocated memory is still 67.1MB. Free memory was 48.9MB in the beginning and 40.4MB in the end (delta: 8.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 451644.53ms. Allocated memory was 67.1MB in the beginning and 251.7MB in the end (delta: 184.5MB). Free memory was 40.0MB in the beginning and 102.8MB in the end (delta: -62.8MB). Peak memory consumption was 123.0MB. Max. memory is 16.1GB. * Witness Printer took 113.35ms. Allocated memory is still 251.7MB. Free memory was 102.8MB in the beginning and 98.6MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 36]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L27] int n = __VERIFIER_nondet_int(); [L28] COND FALSE !(n < 1) VAL [n=32] [L31] CALL, EXPR hanoi(n) VAL [\old(n)=32] [L19] COND FALSE !(n == 1) VAL [\old(n)=32, n=32] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=31] [L19] COND FALSE !(n == 1) VAL [\old(n)=31, n=31] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=30] [L19] COND FALSE !(n == 1) VAL [\old(n)=30, n=30] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=29] [L19] COND FALSE !(n == 1) VAL [\old(n)=29, n=29] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=28] [L19] COND FALSE !(n == 1) VAL [\old(n)=28, n=28] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=27] [L19] COND FALSE !(n == 1) VAL [\old(n)=27, n=27] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=26] [L19] COND FALSE !(n == 1) VAL [\old(n)=26, n=26] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=25] [L19] COND FALSE !(n == 1) VAL [\old(n)=25, n=25] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=24] [L19] COND FALSE !(n == 1) VAL [\old(n)=24, n=24] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=23] [L19] COND FALSE !(n == 1) VAL [\old(n)=23, n=23] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=22] [L19] COND FALSE !(n == 1) VAL [\old(n)=22, n=22] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=21] [L19] COND FALSE !(n == 1) VAL [\old(n)=21, n=21] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=20] [L19] COND FALSE !(n == 1) VAL [\old(n)=20, n=20] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=19] [L19] COND FALSE !(n == 1) VAL [\old(n)=19, n=19] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=18] [L19] COND FALSE !(n == 1) VAL [\old(n)=18, n=18] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=17] [L19] COND FALSE !(n == 1) VAL [\old(n)=17, n=17] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=16] [L19] COND FALSE !(n == 1) VAL [\old(n)=16, n=16] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=15] [L19] COND FALSE !(n == 1) VAL [\old(n)=15, n=15] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=14] [L19] COND FALSE !(n == 1) VAL [\old(n)=14, n=14] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=13] [L19] COND FALSE !(n == 1) VAL [\old(n)=13, n=13] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=12] [L19] COND FALSE !(n == 1) VAL [\old(n)=12, n=12] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=11] [L19] COND FALSE !(n == 1) VAL [\old(n)=11, n=11] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=10] [L19] COND FALSE !(n == 1) VAL [\old(n)=10, n=10] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=9] [L19] COND FALSE !(n == 1) VAL [\old(n)=9, n=9] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=8] [L19] COND FALSE !(n == 1) VAL [\old(n)=8, n=8] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=7] [L19] COND FALSE !(n == 1) VAL [\old(n)=7, n=7] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=6] [L19] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=5] [L19] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=4] [L19] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=3] [L19] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=2] [L19] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L22] CALL, EXPR hanoi(n-1) VAL [\old(n)=1] [L19] COND TRUE n == 1 [L20] return 1; VAL [\old(n)=1, \result=1, n=1] [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=2, hanoi(n-1)=1, n=2] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=3, hanoi(n-1)=3, n=3] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=4, hanoi(n-1)=7, n=4] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=5, hanoi(n-1)=15, n=5] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=6, hanoi(n-1)=31, n=6] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=7, hanoi(n-1)=63, n=7] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=8, hanoi(n-1)=127, n=8] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=9, hanoi(n-1)=255, n=9] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=10, hanoi(n-1)=511, n=10] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=11, hanoi(n-1)=1023, n=11] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=12, hanoi(n-1)=2047, n=12] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=13, hanoi(n-1)=4095, n=13] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=14, hanoi(n-1)=8191, n=14] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=15, hanoi(n-1)=16383, n=15] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=16, hanoi(n-1)=32767, n=16] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=17, hanoi(n-1)=65535, n=17] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=18, hanoi(n-1)=131071, n=18] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=19, hanoi(n-1)=262143, n=19] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=20, hanoi(n-1)=524287, n=20] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=21, hanoi(n-1)=1048575, n=21] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=22, hanoi(n-1)=2097151, n=22] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=23, hanoi(n-1)=4194303, n=23] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=24, hanoi(n-1)=8388607, n=24] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=25, hanoi(n-1)=16777215, n=25] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=26, hanoi(n-1)=33554431, n=26] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=27, hanoi(n-1)=67108863, n=27] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=28, hanoi(n-1)=134217727, n=28] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=29, hanoi(n-1)=268435455, n=29] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=30, hanoi(n-1)=536870911, n=30] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=31, hanoi(n-1)=1073741823, n=31] [L22] return 2 * (hanoi(n-1)) + 1; [L22] RET, EXPR hanoi(n-1) VAL [\old(n)=32, hanoi(n-1)=2147483647, n=32] [L22] return 2 * (hanoi(n-1)) + 1; [L31] RET, EXPR hanoi(n) VAL [hanoi(n)=-1, n=32] [L31] unsigned result = hanoi(n); [L33] COND FALSE !(result+1>0 && result+1 == 1<