./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa --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 0f3b69410d84404822a26401b92e2c10c65259dbe30a6f843124f3a9a51940ad --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-12-06 20:24:30,818 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-12-06 20:24:30,820 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-12-06 20:24:30,847 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-12-06 20:24:30,848 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-12-06 20:24:30,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-12-06 20:24:30,850 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-12-06 20:24:30,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-12-06 20:24:30,853 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-12-06 20:24:30,854 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-12-06 20:24:30,855 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-12-06 20:24:30,856 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-12-06 20:24:30,856 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-12-06 20:24:30,857 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-12-06 20:24:30,858 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-12-06 20:24:30,859 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-12-06 20:24:30,860 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-12-06 20:24:30,861 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-12-06 20:24:30,862 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-12-06 20:24:30,864 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-12-06 20:24:30,866 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-12-06 20:24:30,867 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-12-06 20:24:30,868 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-12-06 20:24:30,869 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-12-06 20:24:30,871 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-12-06 20:24:30,872 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-12-06 20:24:30,872 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-12-06 20:24:30,873 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-12-06 20:24:30,873 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-12-06 20:24:30,874 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-12-06 20:24:30,874 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-12-06 20:24:30,875 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-12-06 20:24:30,875 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-12-06 20:24:30,876 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-12-06 20:24:30,877 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-12-06 20:24:30,877 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-12-06 20:24:30,877 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-12-06 20:24:30,878 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-12-06 20:24:30,878 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-12-06 20:24:30,878 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-12-06 20:24:30,879 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-12-06 20:24:30,880 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-12-06 20:24:30,899 INFO L113 SettingsManager]: Loading preferences was successful [2021-12-06 20:24:30,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-12-06 20:24:30,899 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-12-06 20:24:30,899 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-12-06 20:24:30,900 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-12-06 20:24:30,900 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-12-06 20:24:30,900 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-12-06 20:24:30,900 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-12-06 20:24:30,900 INFO L138 SettingsManager]: * Use SBE=true [2021-12-06 20:24:30,901 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-12-06 20:24:30,901 INFO L138 SettingsManager]: * sizeof long=4 [2021-12-06 20:24:30,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-12-06 20:24:30,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-12-06 20:24:30,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-12-06 20:24:30,901 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-12-06 20:24:30,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-12-06 20:24:30,901 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-12-06 20:24:30,901 INFO L138 SettingsManager]: * sizeof long double=12 [2021-12-06 20:24:30,901 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-12-06 20:24:30,902 INFO L138 SettingsManager]: * Use constant arrays=true [2021-12-06 20:24:30,902 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-12-06 20:24:30,902 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-12-06 20:24:30,902 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-12-06 20:24:30,902 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-12-06 20:24:30,902 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:24:30,902 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-12-06 20:24:30,902 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-12-06 20:24:30,903 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-12-06 20:24:30,903 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-12-06 20:24:30,903 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-12-06 20:24:30,903 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-12-06 20:24:30,903 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-12-06 20:24:30,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-12-06 20:24:30,903 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-12-06 20:24:30,903 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_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0f3b69410d84404822a26401b92e2c10c65259dbe30a6f843124f3a9a51940ad [2021-12-06 20:24:31,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-12-06 20:24:31,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-12-06 20:24:31,100 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-12-06 20:24:31,101 INFO L271 PluginConnector]: Initializing CDTParser... [2021-12-06 20:24:31,102 INFO L275 PluginConnector]: CDTParser initialized [2021-12-06 20:24:31,102 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-2.i [2021-12-06 20:24:31,143 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/data/05abbc507/4053577534524f09816df5af98c3cc0c/FLAG9ba034eb5 [2021-12-06 20:24:31,617 INFO L306 CDTParser]: Found 1 translation units. [2021-12-06 20:24:31,618 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-2.i [2021-12-06 20:24:31,630 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/data/05abbc507/4053577534524f09816df5af98c3cc0c/FLAG9ba034eb5 [2021-12-06 20:24:31,640 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/data/05abbc507/4053577534524f09816df5af98c3cc0c [2021-12-06 20:24:31,642 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-12-06 20:24:31,643 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-12-06 20:24:31,644 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-12-06 20:24:31,644 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-12-06 20:24:31,647 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-12-06 20:24:31,647 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:24:31" (1/1) ... [2021-12-06 20:24:31,648 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@42447884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:31, skipping insertion in model container [2021-12-06 20:24:31,648 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.12 08:24:31" (1/1) ... [2021-12-06 20:24:31,654 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-12-06 20:24:31,700 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-12-06 20:24:31,971 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_9b02c3f6-e989-4a93-b1a0-1e316389043d/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-2.i[33021,33034] [2021-12-06 20:24:32,070 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_9b02c3f6-e989-4a93-b1a0-1e316389043d/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-2.i[49681,49694] [2021-12-06 20:24:32,082 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:24:32,088 INFO L203 MainTranslator]: Completed pre-run [2021-12-06 20:24:32,112 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_9b02c3f6-e989-4a93-b1a0-1e316389043d/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-2.i[33021,33034] [2021-12-06 20:24:32,168 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_9b02c3f6-e989-4a93-b1a0-1e316389043d/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test5-2.i[49681,49694] [2021-12-06 20:24:32,175 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-12-06 20:24:32,202 INFO L208 MainTranslator]: Completed translation [2021-12-06 20:24:32,202 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:32 WrapperNode [2021-12-06 20:24:32,202 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-12-06 20:24:32,203 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-12-06 20:24:32,203 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-12-06 20:24:32,203 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-12-06 20:24:32,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:32" (1/1) ... [2021-12-06 20:24:32,237 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:32" (1/1) ... [2021-12-06 20:24:32,290 INFO L137 Inliner]: procedures = 177, calls = 439, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1557 [2021-12-06 20:24:32,291 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-12-06 20:24:32,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-12-06 20:24:32,291 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-12-06 20:24:32,291 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-12-06 20:24:32,297 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:32" (1/1) ... [2021-12-06 20:24:32,298 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:32" (1/1) ... [2021-12-06 20:24:32,307 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:32" (1/1) ... [2021-12-06 20:24:32,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:32" (1/1) ... [2021-12-06 20:24:32,344 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:32" (1/1) ... [2021-12-06 20:24:32,355 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:32" (1/1) ... [2021-12-06 20:24:32,361 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:32" (1/1) ... [2021-12-06 20:24:32,370 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-12-06 20:24:32,371 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-12-06 20:24:32,371 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-12-06 20:24:32,371 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-12-06 20:24:32,372 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:32" (1/1) ... [2021-12-06 20:24:32,378 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-12-06 20:24:32,386 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:24:32,395 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-12-06 20:24:32,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-12-06 20:24:32,423 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-12-06 20:24:32,424 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-12-06 20:24:32,424 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-12-06 20:24:32,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-12-06 20:24:32,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2021-12-06 20:24:32,424 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2021-12-06 20:24:32,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-12-06 20:24:32,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-12-06 20:24:32,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-12-06 20:24:32,424 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-12-06 20:24:32,425 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2021-12-06 20:24:32,425 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-12-06 20:24:32,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-12-06 20:24:32,425 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-12-06 20:24:32,425 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-12-06 20:24:32,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-12-06 20:24:32,589 INFO L236 CfgBuilder]: Building ICFG [2021-12-06 20:24:32,591 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-12-06 20:24:33,469 INFO L277 CfgBuilder]: Performing block encoding [2021-12-06 20:24:33,477 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-12-06 20:24:33,477 INFO L301 CfgBuilder]: Removed 92 assume(true) statements. [2021-12-06 20:24:33,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:24:33 BoogieIcfgContainer [2021-12-06 20:24:33,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-12-06 20:24:33,481 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-12-06 20:24:33,481 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-12-06 20:24:33,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-12-06 20:24:33,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.12 08:24:31" (1/3) ... [2021-12-06 20:24:33,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ac4ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:24:33, skipping insertion in model container [2021-12-06 20:24:33,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.12 08:24:32" (2/3) ... [2021-12-06 20:24:33,484 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48ac4ec1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.12 08:24:33, skipping insertion in model container [2021-12-06 20:24:33,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.12 08:24:33" (3/3) ... [2021-12-06 20:24:33,486 INFO L111 eAbstractionObserver]: Analyzing ICFG uthash_BER_test5-2.i [2021-12-06 20:24:33,490 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-12-06 20:24:33,490 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-12-06 20:24:33,529 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-12-06 20:24:33,535 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 [2021-12-06 20:24:33,535 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-12-06 20:24:33,561 INFO L276 IsEmpty]: Start isEmpty. Operand has 287 states, 271 states have (on average 1.6974169741697418) internal successors, (460), 278 states have internal predecessors, (460), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 20:24:33,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-12-06 20:24:33,564 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:33,564 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:33,565 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:24:33,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:33,569 INFO L85 PathProgramCache]: Analyzing trace with hash 691392686, now seen corresponding path program 1 times [2021-12-06 20:24:33,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:24:33,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715524237] [2021-12-06 20:24:33,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:33,578 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:24:33,674 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:24:33,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665178037] [2021-12-06 20:24:33,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:33,675 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:24:33,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:24:33,676 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:24:33,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-12-06 20:24:33,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:33,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 1 conjunts are in the unsatisfiable core [2021-12-06 20:24:33,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:33,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:24:33,815 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:33,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:24:33,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715524237] [2021-12-06 20:24:33,816 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:24:33,816 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665178037] [2021-12-06 20:24:33,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665178037] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:33,816 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:33,816 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-12-06 20:24:33,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708660150] [2021-12-06 20:24:33,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:33,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-12-06 20:24:33,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:24:33,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-12-06 20:24:33,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 20:24:33,844 INFO L87 Difference]: Start difference. First operand has 287 states, 271 states have (on average 1.6974169741697418) internal successors, (460), 278 states have internal predecessors, (460), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:33,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:33,884 INFO L93 Difference]: Finished difference Result 572 states and 967 transitions. [2021-12-06 20:24:33,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-12-06 20:24:33,885 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-12-06 20:24:33,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:33,894 INFO L225 Difference]: With dead ends: 572 [2021-12-06 20:24:33,894 INFO L226 Difference]: Without dead ends: 254 [2021-12-06 20:24:33,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-12-06 20:24:33,901 INFO L933 BasicCegarLoop]: 381 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:33,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 381 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:24:33,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-12-06 20:24:33,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2021-12-06 20:24:33,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 239 states have (on average 1.3179916317991631) internal successors, (315), 245 states have internal predecessors, (315), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 20:24:33,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 337 transitions. [2021-12-06 20:24:33,943 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 337 transitions. Word has length 8 [2021-12-06 20:24:33,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:33,944 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 337 transitions. [2021-12-06 20:24:33,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:33,944 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 337 transitions. [2021-12-06 20:24:33,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-12-06 20:24:33,946 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:33,946 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:33,967 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-12-06 20:24:34,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2021-12-06 20:24:34,148 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:24:34,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:34,151 INFO L85 PathProgramCache]: Analyzing trace with hash -1622673081, now seen corresponding path program 1 times [2021-12-06 20:24:34,151 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:24:34,152 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155477718] [2021-12-06 20:24:34,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:34,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:24:34,216 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:24:34,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1338520511] [2021-12-06 20:24:34,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:34,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:24:34,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:24:34,221 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:24:34,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-12-06 20:24:34,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:34,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 2 conjunts are in the unsatisfiable core [2021-12-06 20:24:34,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:34,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:24:34,447 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:34,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:24:34,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155477718] [2021-12-06 20:24:34,447 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:24:34,448 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338520511] [2021-12-06 20:24:34,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338520511] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:34,448 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:34,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:24:34,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968571817] [2021-12-06 20:24:34,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:34,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:24:34,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:24:34,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:24:34,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:24:34,450 INFO L87 Difference]: Start difference. First operand 254 states and 337 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:34,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:34,520 INFO L93 Difference]: Finished difference Result 573 states and 768 transitions. [2021-12-06 20:24:34,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:24:34,521 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-12-06 20:24:34,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:34,526 INFO L225 Difference]: With dead ends: 573 [2021-12-06 20:24:34,526 INFO L226 Difference]: Without dead ends: 495 [2021-12-06 20:24:34,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:24:34,528 INFO L933 BasicCegarLoop]: 375 mSDtfsCounter, 300 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:34,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 705 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:24:34,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-12-06 20:24:34,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 255. [2021-12-06 20:24:34,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 240 states have (on average 1.3166666666666667) internal successors, (316), 246 states have internal predecessors, (316), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 20:24:34,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 338 transitions. [2021-12-06 20:24:34,554 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 338 transitions. Word has length 42 [2021-12-06 20:24:34,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:34,555 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 338 transitions. [2021-12-06 20:24:34,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:34,555 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 338 transitions. [2021-12-06 20:24:34,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-06 20:24:34,560 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:34,560 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:34,579 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-12-06 20:24:34,761 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:24:34,762 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:24:34,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:34,764 INFO L85 PathProgramCache]: Analyzing trace with hash 1488765968, now seen corresponding path program 1 times [2021-12-06 20:24:34,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:24:34,765 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14139487] [2021-12-06 20:24:34,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:34,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:24:35,001 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:24:35,002 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [815389535] [2021-12-06 20:24:35,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:35,002 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:24:35,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:24:35,003 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:24:35,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-12-06 20:24:35,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:35,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 3047 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:24:35,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:35,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:24:35,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:35,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:24:35,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14139487] [2021-12-06 20:24:35,833 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:24:35,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815389535] [2021-12-06 20:24:35,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815389535] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:35,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:35,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:24:35,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660637070] [2021-12-06 20:24:35,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:35,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:24:35,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:24:35,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:24:35,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:24:35,835 INFO L87 Difference]: Start difference. First operand 255 states and 338 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:35,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:35,886 INFO L93 Difference]: Finished difference Result 528 states and 704 transitions. [2021-12-06 20:24:35,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:24:35,887 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-12-06 20:24:35,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:35,889 INFO L225 Difference]: With dead ends: 528 [2021-12-06 20:24:35,889 INFO L226 Difference]: Without dead ends: 276 [2021-12-06 20:24:35,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:24:35,891 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 9 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:35,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 619 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:24:35,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-12-06 20:24:35,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2021-12-06 20:24:35,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 260 states have (on average 1.2923076923076924) internal successors, (336), 266 states have internal predecessors, (336), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 20:24:35,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 358 transitions. [2021-12-06 20:24:35,906 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 358 transitions. Word has length 140 [2021-12-06 20:24:35,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:35,906 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 358 transitions. [2021-12-06 20:24:35,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:35,906 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 358 transitions. [2021-12-06 20:24:35,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-06 20:24:35,908 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:35,909 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:35,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-12-06 20:24:36,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:24:36,111 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:24:36,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:36,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1918424274, now seen corresponding path program 1 times [2021-12-06 20:24:36,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:24:36,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975430045] [2021-12-06 20:24:36,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:36,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:24:36,336 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:24:36,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678414324] [2021-12-06 20:24:36,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:36,337 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:24:36,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:24:36,338 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:24:36,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-12-06 20:24:36,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:36,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 3049 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:24:36,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:37,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:24:37,087 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:37,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:24:37,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975430045] [2021-12-06 20:24:37,088 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:24:37,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678414324] [2021-12-06 20:24:37,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678414324] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:37,088 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:37,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:24:37,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58348211] [2021-12-06 20:24:37,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:37,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:24:37,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:24:37,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:24:37,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:24:37,089 INFO L87 Difference]: Start difference. First operand 275 states and 358 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:37,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:37,132 INFO L93 Difference]: Finished difference Result 568 states and 744 transitions. [2021-12-06 20:24:37,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:24:37,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-12-06 20:24:37,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:37,134 INFO L225 Difference]: With dead ends: 568 [2021-12-06 20:24:37,134 INFO L226 Difference]: Without dead ends: 296 [2021-12-06 20:24:37,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:24:37,136 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 8 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:37,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 621 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:24:37,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-12-06 20:24:37,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 295. [2021-12-06 20:24:37,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 280 states have (on average 1.2714285714285714) internal successors, (356), 286 states have internal predecessors, (356), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 20:24:37,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 378 transitions. [2021-12-06 20:24:37,148 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 378 transitions. Word has length 140 [2021-12-06 20:24:37,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:37,148 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 378 transitions. [2021-12-06 20:24:37,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:37,149 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 378 transitions. [2021-12-06 20:24:37,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-06 20:24:37,150 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:37,150 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:37,183 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-12-06 20:24:37,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:24:37,352 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:24:37,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:37,354 INFO L85 PathProgramCache]: Analyzing trace with hash -690363184, now seen corresponding path program 1 times [2021-12-06 20:24:37,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:24:37,355 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988693804] [2021-12-06 20:24:37,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:37,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:24:37,486 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:24:37,486 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1129803857] [2021-12-06 20:24:37,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:37,486 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:24:37,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:24:37,487 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:24:37,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-12-06 20:24:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:38,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 3051 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:24:38,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:38,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:24:38,242 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:38,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:24:38,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988693804] [2021-12-06 20:24:38,243 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:24:38,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129803857] [2021-12-06 20:24:38,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1129803857] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:38,243 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:38,243 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:24:38,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733141607] [2021-12-06 20:24:38,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:38,244 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:24:38,244 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:24:38,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:24:38,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:24:38,244 INFO L87 Difference]: Start difference. First operand 295 states and 378 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:38,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:38,287 INFO L93 Difference]: Finished difference Result 393 states and 514 transitions. [2021-12-06 20:24:38,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:24:38,287 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-12-06 20:24:38,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:38,289 INFO L225 Difference]: With dead ends: 393 [2021-12-06 20:24:38,289 INFO L226 Difference]: Without dead ends: 316 [2021-12-06 20:24:38,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:24:38,291 INFO L933 BasicCegarLoop]: 317 mSDtfsCounter, 9 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:38,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 619 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:24:38,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2021-12-06 20:24:38,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 315. [2021-12-06 20:24:38,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 300 states have (on average 1.2533333333333334) internal successors, (376), 306 states have internal predecessors, (376), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 20:24:38,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 398 transitions. [2021-12-06 20:24:38,300 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 398 transitions. Word has length 140 [2021-12-06 20:24:38,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:38,300 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 398 transitions. [2021-12-06 20:24:38,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:38,300 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 398 transitions. [2021-12-06 20:24:38,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-06 20:24:38,302 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:38,302 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:38,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2021-12-06 20:24:38,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:24:38,503 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:24:38,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:38,505 INFO L85 PathProgramCache]: Analyzing trace with hash -909217902, now seen corresponding path program 1 times [2021-12-06 20:24:38,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:24:38,505 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538486375] [2021-12-06 20:24:38,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:38,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:24:38,595 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:24:38,596 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2084300947] [2021-12-06 20:24:38,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:38,596 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:24:38,596 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:24:38,597 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:24:38,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-12-06 20:24:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:39,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 3053 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:24:39,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:24:39,379 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:39,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:24:39,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538486375] [2021-12-06 20:24:39,380 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:24:39,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084300947] [2021-12-06 20:24:39,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084300947] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:39,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:39,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:24:39,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797841550] [2021-12-06 20:24:39,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:39,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:24:39,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:24:39,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:24:39,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:24:39,381 INFO L87 Difference]: Start difference. First operand 315 states and 398 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:39,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:39,450 INFO L93 Difference]: Finished difference Result 619 states and 785 transitions. [2021-12-06 20:24:39,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:24:39,450 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-12-06 20:24:39,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:39,452 INFO L225 Difference]: With dead ends: 619 [2021-12-06 20:24:39,453 INFO L226 Difference]: Without dead ends: 307 [2021-12-06 20:24:39,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:24:39,454 INFO L933 BasicCegarLoop]: 316 mSDtfsCounter, 294 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:39,455 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 647 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:24:39,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-12-06 20:24:39,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 301. [2021-12-06 20:24:39,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 286 states have (on average 1.2412587412587412) internal successors, (355), 292 states have internal predecessors, (355), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 20:24:39,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 377 transitions. [2021-12-06 20:24:39,469 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 377 transitions. Word has length 140 [2021-12-06 20:24:39,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:39,469 INFO L470 AbstractCegarLoop]: Abstraction has 301 states and 377 transitions. [2021-12-06 20:24:39,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:39,470 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 377 transitions. [2021-12-06 20:24:39,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-06 20:24:39,485 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:39,485 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:39,522 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-12-06 20:24:39,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:24:39,703 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:24:39,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:39,734 INFO L85 PathProgramCache]: Analyzing trace with hash -992002364, now seen corresponding path program 1 times [2021-12-06 20:24:39,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:24:39,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103213940] [2021-12-06 20:24:39,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:39,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:24:39,878 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:24:39,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [962208611] [2021-12-06 20:24:39,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:39,878 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:24:39,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:24:39,879 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:24:39,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-12-06 20:24:40,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:40,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 3039 conjuncts, 4 conjunts are in the unsatisfiable core [2021-12-06 20:24:40,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:40,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:24:40,818 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:40,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:24:40,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103213940] [2021-12-06 20:24:40,818 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:24:40,819 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962208611] [2021-12-06 20:24:40,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [962208611] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:40,819 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:40,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-12-06 20:24:40,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816774904] [2021-12-06 20:24:40,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:40,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-12-06 20:24:40,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:24:40,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-12-06 20:24:40,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:24:40,820 INFO L87 Difference]: Start difference. First operand 301 states and 377 transitions. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:40,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:40,889 INFO L93 Difference]: Finished difference Result 680 states and 852 transitions. [2021-12-06 20:24:40,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:24:40,889 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-12-06 20:24:40,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:40,891 INFO L225 Difference]: With dead ends: 680 [2021-12-06 20:24:40,891 INFO L226 Difference]: Without dead ends: 382 [2021-12-06 20:24:40,892 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:24:40,892 INFO L933 BasicCegarLoop]: 412 mSDtfsCounter, 276 mSDsluCounter, 918 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 1330 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:40,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 1330 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:24:40,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2021-12-06 20:24:40,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 287. [2021-12-06 20:24:40,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 272 states have (on average 1.2279411764705883) internal successors, (334), 278 states have internal predecessors, (334), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 20:24:40,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 356 transitions. [2021-12-06 20:24:40,901 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 356 transitions. Word has length 140 [2021-12-06 20:24:40,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:40,901 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 356 transitions. [2021-12-06 20:24:40,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:40,902 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 356 transitions. [2021-12-06 20:24:40,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-06 20:24:40,903 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:40,903 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:40,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-12-06 20:24:41,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-12-06 20:24:41,105 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:24:41,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:41,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1368143440, now seen corresponding path program 1 times [2021-12-06 20:24:41,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:24:41,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741542446] [2021-12-06 20:24:41,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:41,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:24:41,308 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:24:41,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [300371890] [2021-12-06 20:24:41,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:41,308 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:24:41,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:24:41,309 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:24:41,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-12-06 20:24:42,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:42,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 3027 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:24:42,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:42,262 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-12-06 20:24:42,262 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:42,263 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:24:42,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741542446] [2021-12-06 20:24:42,263 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:24:42,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300371890] [2021-12-06 20:24:42,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300371890] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:42,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:42,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-12-06 20:24:42,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244363360] [2021-12-06 20:24:42,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:42,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-12-06 20:24:42,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:24:42,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-12-06 20:24:42,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-12-06 20:24:42,264 INFO L87 Difference]: Start difference. First operand 287 states and 356 transitions. Second operand has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:42,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:42,305 INFO L93 Difference]: Finished difference Result 375 states and 472 transitions. [2021-12-06 20:24:42,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-12-06 20:24:42,305 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-12-06 20:24:42,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:42,307 INFO L225 Difference]: With dead ends: 375 [2021-12-06 20:24:42,307 INFO L226 Difference]: Without dead ends: 278 [2021-12-06 20:24:42,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-12-06 20:24:42,308 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 80 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 819 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:42,308 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 819 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:24:42,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-12-06 20:24:42,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 273. [2021-12-06 20:24:42,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 258 states have (on average 1.2131782945736433) internal successors, (313), 264 states have internal predecessors, (313), 11 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (11), 7 states have call predecessors, (11), 11 states have call successors, (11) [2021-12-06 20:24:42,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 335 transitions. [2021-12-06 20:24:42,316 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 335 transitions. Word has length 140 [2021-12-06 20:24:42,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:42,316 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 335 transitions. [2021-12-06 20:24:42,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.0) internal successors, (140), 4 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:42,317 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 335 transitions. [2021-12-06 20:24:42,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-12-06 20:24:42,318 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:42,318 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:42,345 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-12-06 20:24:42,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:24:42,520 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:24:42,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:42,521 INFO L85 PathProgramCache]: Analyzing trace with hash 485294594, now seen corresponding path program 1 times [2021-12-06 20:24:42,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:24:42,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861191731] [2021-12-06 20:24:42,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:42,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:24:42,642 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:24:42,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [795056746] [2021-12-06 20:24:42,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:42,642 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:24:42,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:24:42,643 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:24:42,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-12-06 20:24:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:24:43,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 3013 conjuncts, 3 conjunts are in the unsatisfiable core [2021-12-06 20:24:43,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:24:43,692 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:24:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:24:43,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:24:43,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861191731] [2021-12-06 20:24:43,833 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:24:43,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795056746] [2021-12-06 20:24:43,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795056746] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:24:43,833 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:24:43,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-12-06 20:24:43,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807221192] [2021-12-06 20:24:43,834 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:24:43,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-12-06 20:24:43,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:24:43,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-12-06 20:24:43,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:24:43,835 INFO L87 Difference]: Start difference. First operand 273 states and 335 transitions. Second operand has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:43,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:43,942 INFO L93 Difference]: Finished difference Result 1057 states and 1307 transitions. [2021-12-06 20:24:43,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-12-06 20:24:43,942 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 140 [2021-12-06 20:24:43,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:43,947 INFO L225 Difference]: With dead ends: 1057 [2021-12-06 20:24:43,947 INFO L226 Difference]: Without dead ends: 973 [2021-12-06 20:24:43,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-12-06 20:24:43,948 INFO L933 BasicCegarLoop]: 432 mSDtfsCounter, 1033 mSDsluCounter, 982 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1072 SdHoareTripleChecker+Valid, 1414 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:43,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1072 Valid, 1414 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-12-06 20:24:43,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2021-12-06 20:24:43,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 819. [2021-12-06 20:24:43,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 819 states, 786 states have (on average 1.1997455470737914) internal successors, (943), 792 states have internal predecessors, (943), 29 states have call successors, (29), 2 states have call predecessors, (29), 2 states have return successors, (29), 25 states have call predecessors, (29), 29 states have call successors, (29) [2021-12-06 20:24:43,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 819 states to 819 states and 1001 transitions. [2021-12-06 20:24:43,973 INFO L78 Accepts]: Start accepts. Automaton has 819 states and 1001 transitions. Word has length 140 [2021-12-06 20:24:43,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:43,973 INFO L470 AbstractCegarLoop]: Abstraction has 819 states and 1001 transitions. [2021-12-06 20:24:43,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 40.0) internal successors, (240), 6 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:43,973 INFO L276 IsEmpty]: Start isEmpty. Operand 819 states and 1001 transitions. [2021-12-06 20:24:43,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 435 [2021-12-06 20:24:43,979 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:43,980 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:44,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2021-12-06 20:24:44,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-12-06 20:24:44,180 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:24:44,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:44,181 INFO L85 PathProgramCache]: Analyzing trace with hash -541614505, now seen corresponding path program 2 times [2021-12-06 20:24:44,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:24:44,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556859958] [2021-12-06 20:24:44,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:44,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:24:44,582 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:24:44,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [508555344] [2021-12-06 20:24:44,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-12-06 20:24:44,583 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:24:44,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:24:44,583 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:24:44,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-12-06 20:24:46,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-12-06 20:24:46,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:24:46,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 11668 conjuncts, 6 conjunts are in the unsatisfiable core [2021-12-06 20:24:46,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:47,302 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 0 proven. 592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:24:47,302 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-12-06 20:24:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 0 proven. 592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-12-06 20:24:47,691 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:24:47,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556859958] [2021-12-06 20:24:47,691 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:24:47,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508555344] [2021-12-06 20:24:47,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508555344] provided 0 perfect and 2 imperfect interpolant sequences [2021-12-06 20:24:47,691 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-12-06 20:24:47,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-12-06 20:24:47,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671271179] [2021-12-06 20:24:47,692 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-12-06 20:24:47,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-12-06 20:24:47,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:24:47,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-12-06 20:24:47,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-06 20:24:47,694 INFO L87 Difference]: Start difference. First operand 819 states and 1001 transitions. Second operand has 12 states, 12 states have (on average 69.0) internal successors, (828), 12 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:47,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:47,956 INFO L93 Difference]: Finished difference Result 2380 states and 2939 transitions. [2021-12-06 20:24:47,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-12-06 20:24:47,956 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 69.0) internal successors, (828), 12 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 434 [2021-12-06 20:24:47,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:47,967 INFO L225 Difference]: With dead ends: 2380 [2021-12-06 20:24:47,967 INFO L226 Difference]: Without dead ends: 2296 [2021-12-06 20:24:47,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 866 GetRequests, 856 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-12-06 20:24:47,968 INFO L933 BasicCegarLoop]: 521 mSDtfsCounter, 3878 mSDsluCounter, 2483 mSDsCounter, 0 mSdLazyCounter, 195 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3968 SdHoareTripleChecker+Valid, 3004 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 195 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:47,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3968 Valid, 3004 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 195 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-12-06 20:24:47,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2296 states. [2021-12-06 20:24:48,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2296 to 1911. [2021-12-06 20:24:48,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1911 states, 1842 states have (on average 1.1959826275787189) internal successors, (2203), 1848 states have internal predecessors, (2203), 65 states have call successors, (65), 2 states have call predecessors, (65), 2 states have return successors, (65), 61 states have call predecessors, (65), 65 states have call successors, (65) [2021-12-06 20:24:48,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1911 states to 1911 states and 2333 transitions. [2021-12-06 20:24:48,024 INFO L78 Accepts]: Start accepts. Automaton has 1911 states and 2333 transitions. Word has length 434 [2021-12-06 20:24:48,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:48,025 INFO L470 AbstractCegarLoop]: Abstraction has 1911 states and 2333 transitions. [2021-12-06 20:24:48,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 69.0) internal successors, (828), 12 states have internal predecessors, (828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:48,025 INFO L276 IsEmpty]: Start isEmpty. Operand 1911 states and 2333 transitions. [2021-12-06 20:24:48,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1023 [2021-12-06 20:24:48,040 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:48,040 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:48,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-12-06 20:24:48,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-12-06 20:24:48,241 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:24:48,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:48,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1302990785, now seen corresponding path program 3 times [2021-12-06 20:24:48,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:24:48,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290767248] [2021-12-06 20:24:48,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:48,242 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:24:49,054 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:24:49,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1465398448] [2021-12-06 20:24:49,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-12-06 20:24:49,055 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:24:49,055 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:24:49,055 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:24:49,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-12-06 20:24:51,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-12-06 20:24:51,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-12-06 20:24:51,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 3013 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 20:24:51,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:24:54,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4420 backedges. 145 proven. 0 refuted. 0 times theorem prover too weak. 4275 trivial. 0 not checked. [2021-12-06 20:24:54,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:24:54,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:24:54,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290767248] [2021-12-06 20:24:54,163 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:24:54,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465398448] [2021-12-06 20:24:54,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465398448] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:24:54,163 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:24:54,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:24:54,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819999814] [2021-12-06 20:24:54,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:24:54,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:24:54,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:24:54,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:24:54,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:24:54,165 INFO L87 Difference]: Start difference. First operand 1911 states and 2333 transitions. Second operand has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:54,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:24:54,236 INFO L93 Difference]: Finished difference Result 3736 states and 4568 transitions. [2021-12-06 20:24:54,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:24:54,237 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1022 [2021-12-06 20:24:54,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:24:54,246 INFO L225 Difference]: With dead ends: 3736 [2021-12-06 20:24:54,246 INFO L226 Difference]: Without dead ends: 1970 [2021-12-06 20:24:54,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1021 GetRequests, 1020 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:24:54,250 INFO L933 BasicCegarLoop]: 364 mSDtfsCounter, 124 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 660 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:24:54,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 660 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:24:54,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2021-12-06 20:24:54,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1968. [2021-12-06 20:24:54,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1968 states, 1894 states have (on average 1.195881731784583) internal successors, (2265), 1905 states have internal predecessors, (2265), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 62 states have call predecessors, (70), 70 states have call successors, (70) [2021-12-06 20:24:54,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1968 states to 1968 states and 2405 transitions. [2021-12-06 20:24:54,304 INFO L78 Accepts]: Start accepts. Automaton has 1968 states and 2405 transitions. Word has length 1022 [2021-12-06 20:24:54,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:24:54,304 INFO L470 AbstractCegarLoop]: Abstraction has 1968 states and 2405 transitions. [2021-12-06 20:24:54,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.0) internal successors, (156), 3 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-12-06 20:24:54,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1968 states and 2405 transitions. [2021-12-06 20:24:54,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1038 [2021-12-06 20:24:54,316 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:24:54,317 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:24:54,351 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-12-06 20:24:54,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-12-06 20:24:54,518 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:24:54,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:24:54,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1607178450, now seen corresponding path program 1 times [2021-12-06 20:24:54,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:24:54,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916902205] [2021-12-06 20:24:54,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:54,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:24:55,272 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:24:55,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [387406659] [2021-12-06 20:24:55,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:24:55,272 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:24:55,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:24:55,273 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:24:55,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-12-06 20:25:01,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:25:01,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 28115 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 20:25:01,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:25:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4406 backedges. 325 proven. 0 refuted. 0 times theorem prover too weak. 4081 trivial. 0 not checked. [2021-12-06 20:25:02,205 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:25:02,206 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:25:02,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916902205] [2021-12-06 20:25:02,206 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:25:02,206 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387406659] [2021-12-06 20:25:02,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387406659] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:25:02,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:25:02,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:25:02,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24314659] [2021-12-06 20:25:02,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:25:02,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:25:02,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:25:02,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:25:02,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:25:02,209 INFO L87 Difference]: Start difference. First operand 1968 states and 2405 transitions. Second operand has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 20:25:02,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:25:02,265 INFO L93 Difference]: Finished difference Result 3878 states and 4744 transitions. [2021-12-06 20:25:02,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:25:02,267 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 1037 [2021-12-06 20:25:02,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:25:02,276 INFO L225 Difference]: With dead ends: 3878 [2021-12-06 20:25:02,277 INFO L226 Difference]: Without dead ends: 1966 [2021-12-06 20:25:02,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1036 GetRequests, 1035 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:25:02,280 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 15 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 616 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:25:02,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 616 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:25:02,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2021-12-06 20:25:02,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1966. [2021-12-06 20:25:02,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1966 states, 1892 states have (on average 1.1955602536997887) internal successors, (2262), 1903 states have internal predecessors, (2262), 70 states have call successors, (70), 2 states have call predecessors, (70), 2 states have return successors, (70), 62 states have call predecessors, (70), 70 states have call successors, (70) [2021-12-06 20:25:02,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1966 states to 1966 states and 2402 transitions. [2021-12-06 20:25:02,320 INFO L78 Accepts]: Start accepts. Automaton has 1966 states and 2402 transitions. Word has length 1037 [2021-12-06 20:25:02,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:25:02,321 INFO L470 AbstractCegarLoop]: Abstraction has 1966 states and 2402 transitions. [2021-12-06 20:25:02,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.333333333333336) internal successors, (187), 3 states have internal predecessors, (187), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-12-06 20:25:02,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1966 states and 2402 transitions. [2021-12-06 20:25:02,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1053 [2021-12-06 20:25:02,331 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:25:02,332 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:25:02,429 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-12-06 20:25:02,532 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-12-06 20:25:02,533 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:25:02,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:25:02,533 INFO L85 PathProgramCache]: Analyzing trace with hash -552910831, now seen corresponding path program 1 times [2021-12-06 20:25:02,533 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:25:02,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877475602] [2021-12-06 20:25:02,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:25:02,534 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:25:03,278 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:25:03,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [306035718] [2021-12-06 20:25:03,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:25:03,278 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:25:03,278 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:25:03,279 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:25:03,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-12-06 20:25:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-12-06 20:25:10,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 27252 conjuncts, 5 conjunts are in the unsatisfiable core [2021-12-06 20:25:10,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-12-06 20:25:12,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4408 backedges. 1431 proven. 0 refuted. 0 times theorem prover too weak. 2977 trivial. 0 not checked. [2021-12-06 20:25:12,193 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-12-06 20:25:12,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-12-06 20:25:12,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877475602] [2021-12-06 20:25:12,193 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-12-06 20:25:12,193 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306035718] [2021-12-06 20:25:12,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306035718] provided 1 perfect and 0 imperfect interpolant sequences [2021-12-06 20:25:12,193 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-12-06 20:25:12,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-12-06 20:25:12,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262535509] [2021-12-06 20:25:12,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-12-06 20:25:12,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-12-06 20:25:12,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-12-06 20:25:12,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-12-06 20:25:12,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:25:12,195 INFO L87 Difference]: Start difference. First operand 1966 states and 2402 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 20:25:12,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-12-06 20:25:12,272 INFO L93 Difference]: Finished difference Result 4886 states and 5976 transitions. [2021-12-06 20:25:12,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-12-06 20:25:12,272 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 1052 [2021-12-06 20:25:12,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-12-06 20:25:12,285 INFO L225 Difference]: With dead ends: 4886 [2021-12-06 20:25:12,285 INFO L226 Difference]: Without dead ends: 3418 [2021-12-06 20:25:12,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1051 GetRequests, 1050 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-12-06 20:25:12,288 INFO L933 BasicCegarLoop]: 480 mSDtfsCounter, 141 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 768 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-12-06 20:25:12,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 768 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-12-06 20:25:12,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3418 states. [2021-12-06 20:25:12,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3418 to 3416. [2021-12-06 20:25:12,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 3309 states have (on average 1.1967361740707163) internal successors, (3960), 3320 states have internal predecessors, (3960), 103 states have call successors, (103), 2 states have call predecessors, (103), 2 states have return successors, (103), 95 states have call predecessors, (103), 103 states have call successors, (103) [2021-12-06 20:25:12,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 4166 transitions. [2021-12-06 20:25:12,354 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 4166 transitions. Word has length 1052 [2021-12-06 20:25:12,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-12-06 20:25:12,355 INFO L470 AbstractCegarLoop]: Abstraction has 3416 states and 4166 transitions. [2021-12-06 20:25:12,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2021-12-06 20:25:12,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 4166 transitions. [2021-12-06 20:25:12,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1060 [2021-12-06 20:25:12,369 INFO L506 BasicCegarLoop]: Found error trace [2021-12-06 20:25:12,369 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-12-06 20:25:12,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-12-06 20:25:12,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:25:12,571 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-12-06 20:25:12,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-12-06 20:25:12,573 INFO L85 PathProgramCache]: Analyzing trace with hash 342774203, now seen corresponding path program 1 times [2021-12-06 20:25:12,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-12-06 20:25:12,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970909487] [2021-12-06 20:25:12,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:25:12,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-12-06 20:25:13,380 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-12-06 20:25:13,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1211106852] [2021-12-06 20:25:13,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-12-06 20:25:13,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-12-06 20:25:13,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 [2021-12-06 20:25:13,381 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-12-06 20:25:13,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9b02c3f6-e989-4a93-b1a0-1e316389043d/bin/uautomizer-DrprNOufMa/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process