./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R --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 d952a2ac4207d7207b65e88d163e23d18bb81c0593196a835eab903a81ce4e5c --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 18:33:58,255 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:33:58,257 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:33:58,295 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:33:58,295 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:33:58,297 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:33:58,315 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:33:58,317 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:33:58,319 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:33:58,321 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:33:58,322 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:33:58,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:33:58,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:33:58,330 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:33:58,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:33:58,337 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:33:58,340 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:33:58,344 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:33:58,346 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:33:58,352 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:33:58,358 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:33:58,361 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:33:58,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:33:58,368 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:33:58,372 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:33:58,377 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:33:58,378 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:33:58,379 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:33:58,381 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:33:58,382 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:33:58,384 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:33:58,385 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:33:58,386 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:33:58,388 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:33:58,389 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:33:58,391 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:33:58,393 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:33:58,394 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:33:58,394 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:33:58,396 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:33:58,398 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:33:58,399 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 18:33:58,437 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:33:58,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:33:58,441 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:33:58,442 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:33:58,443 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:33:58,443 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:33:58,444 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:33:58,444 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:33:58,444 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:33:58,445 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:33:58,446 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:33:58,446 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:33:58,446 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:33:58,447 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:33:58,447 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 18:33:58,447 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:33:58,447 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 18:33:58,447 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:33:58,448 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 18:33:58,448 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:33:58,448 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 18:33:58,448 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:33:58,449 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:33:58,449 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:33:58,449 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:33:58,449 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:33:58,450 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:33:58,450 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 18:33:58,450 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:33:58,450 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:33:58,451 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:33:58,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 18:33:58,451 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:33:58,452 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:33:58,452 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d952a2ac4207d7207b65e88d163e23d18bb81c0593196a835eab903a81ce4e5c [2022-11-25 18:33:58,825 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:33:58,865 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:33:58,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:33:58,870 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:33:58,870 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:33:58,872 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i [2022-11-25 18:34:02,218 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:34:02,691 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:34:02,691 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i [2022-11-25 18:34:02,723 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/data/c8602c70c/cca5493d9ea144dc83893867f1371dba/FLAG82d665538 [2022-11-25 18:34:02,746 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/data/c8602c70c/cca5493d9ea144dc83893867f1371dba [2022-11-25 18:34:02,750 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:34:02,753 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:34:02,759 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:34:02,759 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:34:02,764 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:34:02,767 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:34:02" (1/1) ... [2022-11-25 18:34:02,769 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26a0f303 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:02, skipping insertion in model container [2022-11-25 18:34:02,769 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:34:02" (1/1) ... [2022-11-25 18:34:02,779 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:34:02,879 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:34:03,760 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[44118,44131] [2022-11-25 18:34:03,787 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[44660,44673] [2022-11-25 18:34:03,795 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 18:34:03,939 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[56247,56260] [2022-11-25 18:34:03,941 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[56368,56381] [2022-11-25 18:34:03,961 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:34:03,974 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:34:04,016 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[44118,44131] [2022-11-25 18:34:04,020 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[44660,44673] [2022-11-25 18:34:04,021 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 18:34:04,151 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[56247,56260] [2022-11-25 18:34:04,160 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test6-2.i[56368,56381] [2022-11-25 18:34:04,173 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:34:04,248 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:34:04,248 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:04 WrapperNode [2022-11-25 18:34:04,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:34:04,250 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:34:04,250 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:34:04,250 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:34:04,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:04" (1/1) ... [2022-11-25 18:34:04,297 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:04" (1/1) ... [2022-11-25 18:34:04,404 INFO L138 Inliner]: procedures = 282, calls = 347, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 1195 [2022-11-25 18:34:04,404 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:34:04,405 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:34:04,405 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:34:04,406 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:34:04,424 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:04" (1/1) ... [2022-11-25 18:34:04,424 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:04" (1/1) ... [2022-11-25 18:34:04,453 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:04" (1/1) ... [2022-11-25 18:34:04,454 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:04" (1/1) ... [2022-11-25 18:34:04,514 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:04" (1/1) ... [2022-11-25 18:34:04,529 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:04" (1/1) ... [2022-11-25 18:34:04,534 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:04" (1/1) ... [2022-11-25 18:34:04,539 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:04" (1/1) ... [2022-11-25 18:34:04,550 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:34:04,551 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:34:04,552 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:34:04,552 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:34:04,553 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:04" (1/1) ... [2022-11-25 18:34:04,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:34:04,621 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:04,642 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:34:04,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:34:04,691 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 18:34:04,691 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-25 18:34:04,692 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 18:34:04,692 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 18:34:04,692 INFO L130 BoogieDeclarations]: Found specification of procedure alt_bzero [2022-11-25 18:34:04,693 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_bzero [2022-11-25 18:34:04,693 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 18:34:04,693 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 18:34:04,693 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 18:34:04,693 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 18:34:04,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 18:34:04,694 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:34:04,694 INFO L130 BoogieDeclarations]: Found specification of procedure alt_malloc [2022-11-25 18:34:04,694 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_malloc [2022-11-25 18:34:04,694 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 18:34:04,695 INFO L130 BoogieDeclarations]: Found specification of procedure alt_free [2022-11-25 18:34:04,696 INFO L138 BoogieDeclarations]: Found implementation of procedure alt_free [2022-11-25 18:34:04,696 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:34:04,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:34:04,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:34:05,089 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:34:05,092 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:34:06,934 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:34:06,944 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:34:06,944 INFO L300 CfgBuilder]: Removed 72 assume(true) statements. [2022-11-25 18:34:06,947 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:34:06 BoogieIcfgContainer [2022-11-25 18:34:06,947 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:34:06,949 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:34:06,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:34:06,953 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:34:06,954 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:34:02" (1/3) ... [2022-11-25 18:34:06,954 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d570a12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:34:06, skipping insertion in model container [2022-11-25 18:34:06,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:34:04" (2/3) ... [2022-11-25 18:34:06,955 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d570a12 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:34:06, skipping insertion in model container [2022-11-25 18:34:06,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:34:06" (3/3) ... [2022-11-25 18:34:06,957 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_BER_test6-2.i [2022-11-25 18:34:06,978 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:34:06,978 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-11-25 18:34:07,040 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:34:07,048 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@53a21654, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:34:07,048 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-25 18:34:07,054 INFO L276 IsEmpty]: Start isEmpty. Operand has 256 states, 232 states have (on average 1.6379310344827587) internal successors, (380), 236 states have internal predecessors, (380), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-25 18:34:07,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-25 18:34:07,063 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:34:07,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:07,065 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 18:34:07,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:07,071 INFO L85 PathProgramCache]: Analyzing trace with hash -927886968, now seen corresponding path program 1 times [2022-11-25 18:34:07,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:07,083 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043734605] [2022-11-25 18:34:07,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:07,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:07,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:07,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:07,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:07,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043734605] [2022-11-25 18:34:07,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043734605] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:07,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:07,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:34:07,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035269000] [2022-11-25 18:34:07,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:07,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:34:07,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:07,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:34:07,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:34:07,478 INFO L87 Difference]: Start difference. First operand has 256 states, 232 states have (on average 1.6379310344827587) internal successors, (380), 236 states have internal predecessors, (380), 16 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) 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) [2022-11-25 18:34:07,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:34:07,583 INFO L93 Difference]: Finished difference Result 507 states and 830 transitions. [2022-11-25 18:34:07,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:34:07,586 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 [2022-11-25 18:34:07,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:34:07,599 INFO L225 Difference]: With dead ends: 507 [2022-11-25 18:34:07,599 INFO L226 Difference]: Without dead ends: 249 [2022-11-25 18:34:07,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:34:07,608 INFO L413 NwaCegarLoop]: 328 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, 328 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:34:07,610 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:34:07,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2022-11-25 18:34:07,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 249. [2022-11-25 18:34:07,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 226 states have (on average 1.3008849557522124) internal successors, (294), 230 states have internal predecessors, (294), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-25 18:34:07,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 324 transitions. [2022-11-25 18:34:07,674 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 324 transitions. Word has length 8 [2022-11-25 18:34:07,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:34:07,674 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 324 transitions. [2022-11-25 18:34:07,675 INFO L496 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) [2022-11-25 18:34:07,675 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 324 transitions. [2022-11-25 18:34:07,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 18:34:07,676 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:34:07,676 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:07,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 18:34:07,677 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 18:34:07,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:07,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1603506083, now seen corresponding path program 1 times [2022-11-25 18:34:07,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:07,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125913973] [2022-11-25 18:34:07,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:07,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:07,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:07,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:07,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:07,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125913973] [2022-11-25 18:34:07,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125913973] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:07,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:07,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:34:07,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487014638] [2022-11-25 18:34:07,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:07,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:34:07,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:07,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:34:07,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:34:07,913 INFO L87 Difference]: Start difference. First operand 249 states and 324 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-11-25 18:34:08,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:34:08,674 INFO L93 Difference]: Finished difference Result 545 states and 715 transitions. [2022-11-25 18:34:08,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:34:08,676 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2022-11-25 18:34:08,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:34:08,679 INFO L225 Difference]: With dead ends: 545 [2022-11-25 18:34:08,679 INFO L226 Difference]: Without dead ends: 403 [2022-11-25 18:34:08,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:34:08,684 INFO L413 NwaCegarLoop]: 318 mSDtfsCounter, 180 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 861 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-25 18:34:08,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 861 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-25 18:34:08,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-11-25 18:34:08,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 251. [2022-11-25 18:34:08,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 228 states have (on average 1.2982456140350878) internal successors, (296), 232 states have internal predecessors, (296), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-25 18:34:08,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 326 transitions. [2022-11-25 18:34:08,737 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 326 transitions. Word has length 10 [2022-11-25 18:34:08,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:34:08,738 INFO L495 AbstractCegarLoop]: Abstraction has 251 states and 326 transitions. [2022-11-25 18:34:08,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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) [2022-11-25 18:34:08,738 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 326 transitions. [2022-11-25 18:34:08,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-25 18:34:08,740 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:34:08,741 INFO L195 NwaCegarLoop]: 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] [2022-11-25 18:34:08,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 18:34:08,741 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 18:34:08,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:08,742 INFO L85 PathProgramCache]: Analyzing trace with hash -177796585, now seen corresponding path program 1 times [2022-11-25 18:34:08,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:08,743 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319320395] [2022-11-25 18:34:08,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:08,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:08,841 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:34:08,842 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [450730434] [2022-11-25 18:34:08,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:08,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:08,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:08,848 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:08,865 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:34:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:09,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 18:34:09,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:09,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:09,232 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:34:09,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:09,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319320395] [2022-11-25 18:34:09,233 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:34:09,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450730434] [2022-11-25 18:34:09,234 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [450730434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:09,234 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:09,234 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:34:09,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51524476] [2022-11-25 18:34:09,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:09,235 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:34:09,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:09,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:34:09,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:34:09,237 INFO L87 Difference]: Start difference. First operand 251 states and 326 transitions. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:09,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:34:09,341 INFO L93 Difference]: Finished difference Result 519 states and 679 transitions. [2022-11-25 18:34:09,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:34:09,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-25 18:34:09,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:34:09,344 INFO L225 Difference]: With dead ends: 519 [2022-11-25 18:34:09,344 INFO L226 Difference]: Without dead ends: 272 [2022-11-25 18:34:09,346 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:34:09,347 INFO L413 NwaCegarLoop]: 304 mSDtfsCounter, 9 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 593 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:34:09,348 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 593 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:34:09,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-11-25 18:34:09,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 271. [2022-11-25 18:34:09,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 248 states have (on average 1.2741935483870968) internal successors, (316), 252 states have internal predecessors, (316), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-25 18:34:09,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 346 transitions. [2022-11-25 18:34:09,382 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 346 transitions. Word has length 47 [2022-11-25 18:34:09,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:34:09,382 INFO L495 AbstractCegarLoop]: Abstraction has 271 states and 346 transitions. [2022-11-25 18:34:09,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:09,383 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 346 transitions. [2022-11-25 18:34:09,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-25 18:34:09,392 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:34:09,392 INFO L195 NwaCegarLoop]: 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] [2022-11-25 18:34:09,401 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-25 18:34:09,600 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:09,601 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 18:34:09,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:09,601 INFO L85 PathProgramCache]: Analyzing trace with hash -318345195, now seen corresponding path program 1 times [2022-11-25 18:34:09,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:09,602 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564710078] [2022-11-25 18:34:09,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:09,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:09,655 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:34:09,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1918119998] [2022-11-25 18:34:09,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:09,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:09,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:09,677 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:09,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:34:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:09,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 18:34:09,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:09,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:09,986 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:34:09,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:09,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564710078] [2022-11-25 18:34:09,986 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:34:09,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918119998] [2022-11-25 18:34:09,987 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918119998] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:09,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:09,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:34:09,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996216981] [2022-11-25 18:34:09,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:09,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:34:09,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:09,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:34:09,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:34:09,989 INFO L87 Difference]: Start difference. First operand 271 states and 346 transitions. Second operand has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:10,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:34:10,091 INFO L93 Difference]: Finished difference Result 531 states and 681 transitions. [2022-11-25 18:34:10,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:34:10,091 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-25 18:34:10,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:34:10,093 INFO L225 Difference]: With dead ends: 531 [2022-11-25 18:34:10,093 INFO L226 Difference]: Without dead ends: 264 [2022-11-25 18:34:10,094 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:34:10,096 INFO L413 NwaCegarLoop]: 305 mSDtfsCounter, 268 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:34:10,096 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 644 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:34:10,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-11-25 18:34:10,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 257. [2022-11-25 18:34:10,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 234 states have (on average 1.2606837606837606) internal successors, (295), 238 states have internal predecessors, (295), 15 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-25 18:34:10,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 325 transitions. [2022-11-25 18:34:10,111 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 325 transitions. Word has length 47 [2022-11-25 18:34:10,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:34:10,112 INFO L495 AbstractCegarLoop]: Abstraction has 257 states and 325 transitions. [2022-11-25 18:34:10,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.25) internal successors, (45), 4 states have internal predecessors, (45), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:10,112 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 325 transitions. [2022-11-25 18:34:10,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-25 18:34:10,114 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:34:10,114 INFO L195 NwaCegarLoop]: 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] [2022-11-25 18:34:10,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:34:10,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:10,322 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 18:34:10,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:10,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1111404323, now seen corresponding path program 1 times [2022-11-25 18:34:10,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:10,323 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480883183] [2022-11-25 18:34:10,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:10,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:10,398 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:34:10,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [966927369] [2022-11-25 18:34:10,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:10,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:10,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:10,400 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:10,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:34:11,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:11,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-25 18:34:11,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:11,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:11,610 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:34:11,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:11,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480883183] [2022-11-25 18:34:11,611 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:34:11,611 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966927369] [2022-11-25 18:34:11,611 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966927369] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:11,612 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:11,612 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 18:34:11,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126812571] [2022-11-25 18:34:11,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:11,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:34:11,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:11,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:34:11,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:34:11,614 INFO L87 Difference]: Start difference. First operand 257 states and 325 transitions. Second operand has 8 states, 8 states have (on average 5.625) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:12,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:34:12,282 INFO L93 Difference]: Finished difference Result 270 states and 338 transitions. [2022-11-25 18:34:12,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:34:12,284 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2022-11-25 18:34:12,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:34:12,287 INFO L225 Difference]: With dead ends: 270 [2022-11-25 18:34:12,288 INFO L226 Difference]: Without dead ends: 268 [2022-11-25 18:34:12,288 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:34:12,291 INFO L413 NwaCegarLoop]: 283 mSDtfsCounter, 490 mSDsluCounter, 1233 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 492 SdHoareTripleChecker+Valid, 1516 SdHoareTripleChecker+Invalid, 242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 18:34:12,291 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [492 Valid, 1516 Invalid, 242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 18:34:12,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-11-25 18:34:12,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 267. [2022-11-25 18:34:12,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 241 states have (on average 1.2572614107883817) internal successors, (303), 246 states have internal predecessors, (303), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-25 18:34:12,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 335 transitions. [2022-11-25 18:34:12,311 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 335 transitions. Word has length 47 [2022-11-25 18:34:12,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:34:12,312 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 335 transitions. [2022-11-25 18:34:12,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.625) internal successors, (45), 6 states have internal predecessors, (45), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:12,312 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 335 transitions. [2022-11-25 18:34:12,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-25 18:34:12,321 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:34:12,321 INFO L195 NwaCegarLoop]: 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] [2022-11-25 18:34:12,333 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:34:12,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:12,530 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 18:34:12,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:12,531 INFO L85 PathProgramCache]: Analyzing trace with hash 98081523, now seen corresponding path program 1 times [2022-11-25 18:34:12,531 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:12,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7713781] [2022-11-25 18:34:12,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:12,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:12,683 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:34:12,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1894656345] [2022-11-25 18:34:12,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:12,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:12,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:12,685 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:12,692 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:34:13,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:13,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 1597 conjuncts, 2 conjunts are in the unsatisfiable core [2022-11-25 18:34:13,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:13,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:13,582 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:34:13,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:13,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7713781] [2022-11-25 18:34:13,583 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:34:13,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894656345] [2022-11-25 18:34:13,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894656345] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:13,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:13,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:34:13,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399623254] [2022-11-25 18:34:13,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:13,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:34:13,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:13,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:34:13,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:34:13,589 INFO L87 Difference]: Start difference. First operand 267 states and 335 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:13,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:34:13,628 INFO L93 Difference]: Finished difference Result 531 states and 668 transitions. [2022-11-25 18:34:13,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:34:13,629 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-25 18:34:13,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:34:13,633 INFO L225 Difference]: With dead ends: 531 [2022-11-25 18:34:13,633 INFO L226 Difference]: Without dead ends: 268 [2022-11-25 18:34:13,636 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:34:13,638 INFO L413 NwaCegarLoop]: 316 mSDtfsCounter, 0 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 627 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:34:13,638 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 627 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:34:13,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-11-25 18:34:13,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2022-11-25 18:34:13,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 242 states have (on average 1.256198347107438) internal successors, (304), 247 states have internal predecessors, (304), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-25 18:34:13,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 336 transitions. [2022-11-25 18:34:13,662 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 336 transitions. Word has length 58 [2022-11-25 18:34:13,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:34:13,663 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 336 transitions. [2022-11-25 18:34:13,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:13,664 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 336 transitions. [2022-11-25 18:34:13,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-25 18:34:13,668 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:34:13,668 INFO L195 NwaCegarLoop]: 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] [2022-11-25 18:34:13,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:34:13,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:13,879 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 18:34:13,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:13,879 INFO L85 PathProgramCache]: Analyzing trace with hash 491108533, now seen corresponding path program 1 times [2022-11-25 18:34:13,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:13,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299814875] [2022-11-25 18:34:13,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:13,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:14,040 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:34:14,040 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [34945435] [2022-11-25 18:34:14,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:14,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:14,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:14,048 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:14,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:34:14,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:14,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 1604 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 18:34:14,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:15,162 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:34:15,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:15,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299814875] [2022-11-25 18:34:15,163 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:34:15,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34945435] [2022-11-25 18:34:15,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34945435] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:15,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:15,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 18:34:15,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517850898] [2022-11-25 18:34:15,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:15,165 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 18:34:15,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:15,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 18:34:15,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:34:15,166 INFO L87 Difference]: Start difference. First operand 268 states and 336 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:15,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:34:15,347 INFO L93 Difference]: Finished difference Result 686 states and 867 transitions. [2022-11-25 18:34:15,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 18:34:15,348 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2022-11-25 18:34:15,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:34:15,351 INFO L225 Difference]: With dead ends: 686 [2022-11-25 18:34:15,351 INFO L226 Difference]: Without dead ends: 422 [2022-11-25 18:34:15,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 18:34:15,353 INFO L413 NwaCegarLoop]: 360 mSDtfsCounter, 142 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:34:15,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [153 Valid, 628 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:34:15,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 422 states. [2022-11-25 18:34:15,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 422 to 383. [2022-11-25 18:34:15,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 354 states have (on average 1.2542372881355932) internal successors, (444), 359 states have internal predecessors, (444), 19 states have call successors, (19), 6 states have call predecessors, (19), 6 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2022-11-25 18:34:15,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 482 transitions. [2022-11-25 18:34:15,377 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 482 transitions. Word has length 58 [2022-11-25 18:34:15,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:34:15,378 INFO L495 AbstractCegarLoop]: Abstraction has 383 states and 482 transitions. [2022-11-25 18:34:15,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 18:34:15,379 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 482 transitions. [2022-11-25 18:34:15,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-11-25 18:34:15,379 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:34:15,380 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:15,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 18:34:15,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 18:34:15,591 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 18:34:15,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:15,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1048240331, now seen corresponding path program 1 times [2022-11-25 18:34:15,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:15,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986058381] [2022-11-25 18:34:15,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:15,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:15,645 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:34:15,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [442975411] [2022-11-25 18:34:15,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:15,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:15,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:15,648 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:15,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:34:16,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:16,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 509 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-25 18:34:16,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:16,406 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:16,407 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:34:16,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 18:34:16,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:16,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986058381] [2022-11-25 18:34:16,596 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:34:16,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442975411] [2022-11-25 18:34:16,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442975411] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:34:16,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:34:16,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 9 [2022-11-25 18:34:16,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807208174] [2022-11-25 18:34:16,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:16,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:34:16,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:16,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:34:16,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-25 18:34:16,600 INFO L87 Difference]: Start difference. First operand 383 states and 482 transitions. Second operand has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 18:34:16,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:34:16,843 INFO L93 Difference]: Finished difference Result 1420 states and 1840 transitions. [2022-11-25 18:34:16,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:34:16,844 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 62 [2022-11-25 18:34:16,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:34:16,851 INFO L225 Difference]: With dead ends: 1420 [2022-11-25 18:34:16,851 INFO L226 Difference]: Without dead ends: 1086 [2022-11-25 18:34:16,853 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 111 SyntacticMatches, 4 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2022-11-25 18:34:16,854 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 1052 mSDsluCounter, 1041 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1052 SdHoareTripleChecker+Valid, 1433 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:34:16,854 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1052 Valid, 1433 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:34:16,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2022-11-25 18:34:16,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 657. [2022-11-25 18:34:16,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 615 states have (on average 1.2682926829268293) internal successors, (780), 621 states have internal predecessors, (780), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (29), 25 states have call predecessors, (29), 28 states have call successors, (29) [2022-11-25 18:34:16,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 837 transitions. [2022-11-25 18:34:16,903 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 837 transitions. Word has length 62 [2022-11-25 18:34:16,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:34:16,904 INFO L495 AbstractCegarLoop]: Abstraction has 657 states and 837 transitions. [2022-11-25 18:34:16,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.0) internal successors, (56), 6 states have internal predecessors, (56), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 18:34:16,904 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 837 transitions. [2022-11-25 18:34:16,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-11-25 18:34:16,905 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:34:16,906 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:16,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:34:17,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:17,115 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 18:34:17,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:17,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1714113871, now seen corresponding path program 1 times [2022-11-25 18:34:17,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:17,115 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44762448] [2022-11-25 18:34:17,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:17,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:17,176 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:34:17,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [355063959] [2022-11-25 18:34:17,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:17,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:17,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:17,178 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:17,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 18:34:17,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:17,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 773 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:34:17,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:18,015 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-25 18:34:18,015 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:34:18,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:18,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44762448] [2022-11-25 18:34:18,016 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:34:18,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355063959] [2022-11-25 18:34:18,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355063959] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:18,018 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:18,018 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:34:18,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106765823] [2022-11-25 18:34:18,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:18,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:34:18,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:18,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:34:18,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:34:18,023 INFO L87 Difference]: Start difference. First operand 657 states and 837 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 18:34:18,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:34:18,201 INFO L93 Difference]: Finished difference Result 1246 states and 1598 transitions. [2022-11-25 18:34:18,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:34:18,202 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 93 [2022-11-25 18:34:18,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:34:18,208 INFO L225 Difference]: With dead ends: 1246 [2022-11-25 18:34:18,208 INFO L226 Difference]: Without dead ends: 657 [2022-11-25 18:34:18,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:34:18,213 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 22 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 1421 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:34:18,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 1421 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:34:18,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2022-11-25 18:34:18,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 657. [2022-11-25 18:34:18,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 615 states have (on average 1.2682926829268293) internal successors, (780), 621 states have internal predecessors, (780), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 25 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-25 18:34:18,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 836 transitions. [2022-11-25 18:34:18,261 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 836 transitions. Word has length 93 [2022-11-25 18:34:18,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:34:18,263 INFO L495 AbstractCegarLoop]: Abstraction has 657 states and 836 transitions. [2022-11-25 18:34:18,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 4 states have internal predecessors, (81), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 18:34:18,263 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 836 transitions. [2022-11-25 18:34:18,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-25 18:34:18,271 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:34:18,271 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:18,290 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-25 18:34:18,480 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:18,480 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 18:34:18,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:18,481 INFO L85 PathProgramCache]: Analyzing trace with hash 828828729, now seen corresponding path program 1 times [2022-11-25 18:34:18,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:18,481 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563948490] [2022-11-25 18:34:18,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:18,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:18,535 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:34:18,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1224391035] [2022-11-25 18:34:18,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:18,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:18,536 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:18,537 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:18,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 18:34:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:19,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 783 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 18:34:19,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:19,325 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2022-11-25 18:34:19,338 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2022-11-25 18:34:19,345 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 18:34:19,346 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:34:19,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:19,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563948490] [2022-11-25 18:34:19,346 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:34:19,347 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224391035] [2022-11-25 18:34:19,347 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224391035] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:19,347 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:19,347 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 18:34:19,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367099872] [2022-11-25 18:34:19,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:19,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 18:34:19,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:19,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 18:34:19,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 18:34:19,354 INFO L87 Difference]: Start difference. First operand 657 states and 836 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-25 18:34:19,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:34:19,807 INFO L93 Difference]: Finished difference Result 947 states and 1224 transitions. [2022-11-25 18:34:19,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 18:34:19,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 98 [2022-11-25 18:34:19,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:34:19,813 INFO L225 Difference]: With dead ends: 947 [2022-11-25 18:34:19,813 INFO L226 Difference]: Without dead ends: 850 [2022-11-25 18:34:19,814 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:34:19,815 INFO L413 NwaCegarLoop]: 306 mSDtfsCounter, 108 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-25 18:34:19,815 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 840 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-25 18:34:19,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2022-11-25 18:34:19,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 661. [2022-11-25 18:34:19,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 619 states have (on average 1.2665589660743135) internal successors, (784), 625 states have internal predecessors, (784), 28 states have call successors, (28), 10 states have call predecessors, (28), 10 states have return successors, (28), 25 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-25 18:34:19,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 840 transitions. [2022-11-25 18:34:19,891 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 840 transitions. Word has length 98 [2022-11-25 18:34:19,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:34:19,892 INFO L495 AbstractCegarLoop]: Abstraction has 661 states and 840 transitions. [2022-11-25 18:34:19,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-25 18:34:19,892 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 840 transitions. [2022-11-25 18:34:19,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-11-25 18:34:19,894 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:34:19,894 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:19,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 18:34:20,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:20,104 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 18:34:20,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:20,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1205616451, now seen corresponding path program 1 times [2022-11-25 18:34:20,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:20,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312717617] [2022-11-25 18:34:20,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:20,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:20,185 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:34:20,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [148829217] [2022-11-25 18:34:20,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:20,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:20,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:20,187 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:20,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 18:34:21,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:21,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 959 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 18:34:21,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:21,594 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2022-11-25 18:34:21,594 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:34:21,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:21,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312717617] [2022-11-25 18:34:21,595 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:34:21,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148829217] [2022-11-25 18:34:21,596 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148829217] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:34:21,596 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:34:21,596 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 18:34:21,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287403767] [2022-11-25 18:34:21,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:34:21,597 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:34:21,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:21,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:34:21,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:34:21,599 INFO L87 Difference]: Start difference. First operand 661 states and 840 transitions. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-25 18:34:21,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:34:21,813 INFO L93 Difference]: Finished difference Result 1262 states and 1617 transitions. [2022-11-25 18:34:21,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:34:21,814 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 108 [2022-11-25 18:34:21,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:34:21,818 INFO L225 Difference]: With dead ends: 1262 [2022-11-25 18:34:21,818 INFO L226 Difference]: Without dead ends: 666 [2022-11-25 18:34:21,820 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2022-11-25 18:34:21,820 INFO L413 NwaCegarLoop]: 302 mSDtfsCounter, 18 mSDsluCounter, 1780 mSDsCounter, 0 mSdLazyCounter, 119 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 2082 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:34:21,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 2082 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 119 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:34:21,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 666 states. [2022-11-25 18:34:21,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 666 to 666. [2022-11-25 18:34:21,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 623 states have (on average 1.2664526484751204) internal successors, (789), 630 states have internal predecessors, (789), 28 states have call successors, (28), 10 states have call predecessors, (28), 11 states have return successors, (29), 25 states have call predecessors, (29), 28 states have call successors, (29) [2022-11-25 18:34:21,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 846 transitions. [2022-11-25 18:34:21,866 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 846 transitions. Word has length 108 [2022-11-25 18:34:21,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:34:21,867 INFO L495 AbstractCegarLoop]: Abstraction has 666 states and 846 transitions. [2022-11-25 18:34:21,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 states have internal predecessors, (85), 3 states have call successors, (8), 2 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2022-11-25 18:34:21,867 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 846 transitions. [2022-11-25 18:34:21,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-11-25 18:34:21,871 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:34:21,871 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:21,900 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 18:34:22,085 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:22,085 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 18:34:22,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:22,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1537609937, now seen corresponding path program 1 times [2022-11-25 18:34:22,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:22,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140152918] [2022-11-25 18:34:22,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:22,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:22,165 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:34:22,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689141608] [2022-11-25 18:34:22,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:22,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:22,167 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:22,169 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:22,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 18:34:24,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:34:24,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 989 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-25 18:34:24,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:24,841 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 24 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 18:34:24,841 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:34:25,058 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 18:34:25,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:25,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140152918] [2022-11-25 18:34:25,059 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:34:25,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689141608] [2022-11-25 18:34:25,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689141608] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:34:25,059 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:34:25,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2022-11-25 18:34:25,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512971256] [2022-11-25 18:34:25,059 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:34:25,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-25 18:34:25,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:25,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-25 18:34:25,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:34:25,061 INFO L87 Difference]: Start difference. First operand 666 states and 846 transitions. Second operand has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-25 18:34:25,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:34:25,462 INFO L93 Difference]: Finished difference Result 1285 states and 1649 transitions. [2022-11-25 18:34:25,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-11-25 18:34:25,463 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 110 [2022-11-25 18:34:25,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:34:25,466 INFO L225 Difference]: With dead ends: 1285 [2022-11-25 18:34:25,467 INFO L226 Difference]: Without dead ends: 682 [2022-11-25 18:34:25,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2022-11-25 18:34:25,482 INFO L413 NwaCegarLoop]: 303 mSDtfsCounter, 27 mSDsluCounter, 1790 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 2093 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 18:34:25,483 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 2093 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 18:34:25,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2022-11-25 18:34:25,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 679. [2022-11-25 18:34:25,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 679 states, 635 states have (on average 1.2708661417322835) internal successors, (807), 642 states have internal predecessors, (807), 28 states have call successors, (28), 11 states have call predecessors, (28), 12 states have return successors, (29), 25 states have call predecessors, (29), 28 states have call successors, (29) [2022-11-25 18:34:25,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 679 states to 679 states and 864 transitions. [2022-11-25 18:34:25,550 INFO L78 Accepts]: Start accepts. Automaton has 679 states and 864 transitions. Word has length 110 [2022-11-25 18:34:25,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:34:25,551 INFO L495 AbstractCegarLoop]: Abstraction has 679 states and 864 transitions. [2022-11-25 18:34:25,551 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.75) internal successors, (105), 12 states have internal predecessors, (105), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-25 18:34:25,552 INFO L276 IsEmpty]: Start isEmpty. Operand 679 states and 864 transitions. [2022-11-25 18:34:25,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-11-25 18:34:25,553 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:34:25,553 INFO L195 NwaCegarLoop]: trace histogram [6, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:25,577 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 18:34:25,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:25,771 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 18:34:25,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:25,771 INFO L85 PathProgramCache]: Analyzing trace with hash -156663203, now seen corresponding path program 2 times [2022-11-25 18:34:25,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:25,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933103738] [2022-11-25 18:34:25,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:25,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:25,885 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:34:25,886 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1635669100] [2022-11-25 18:34:25,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:34:25,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:25,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:25,888 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:25,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 18:34:40,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:34:40,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:34:40,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 1049 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-25 18:34:40,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:34:40,884 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 38 proven. 10 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 18:34:40,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:34:41,265 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-25 18:34:41,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:41,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933103738] [2022-11-25 18:34:41,265 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:34:41,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635669100] [2022-11-25 18:34:41,266 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635669100] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:34:41,266 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:34:41,266 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2022-11-25 18:34:41,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939120332] [2022-11-25 18:34:41,266 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:34:41,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 18:34:41,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:41,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 18:34:41,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2022-11-25 18:34:41,268 INFO L87 Difference]: Start difference. First operand 679 states and 864 transitions. Second operand has 19 states, 19 states have (on average 5.947368421052632) internal successors, (113), 19 states have internal predecessors, (113), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-25 18:34:42,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:34:42,822 INFO L93 Difference]: Finished difference Result 1378 states and 1766 transitions. [2022-11-25 18:34:42,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 18:34:42,824 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.947368421052632) internal successors, (113), 19 states have internal predecessors, (113), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 114 [2022-11-25 18:34:42,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:34:42,828 INFO L225 Difference]: With dead ends: 1378 [2022-11-25 18:34:42,828 INFO L226 Difference]: Without dead ends: 697 [2022-11-25 18:34:42,830 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 209 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=275, Invalid=915, Unknown=0, NotChecked=0, Total=1190 [2022-11-25 18:34:42,831 INFO L413 NwaCegarLoop]: 301 mSDtfsCounter, 301 mSDsluCounter, 2996 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 3297 SdHoareTripleChecker+Invalid, 598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 18:34:42,832 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 3297 Invalid, 598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 18:34:42,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 697 states. [2022-11-25 18:34:42,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 697 to 685. [2022-11-25 18:34:42,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 685 states, 641 states have (on average 1.2683307332293292) internal successors, (813), 648 states have internal predecessors, (813), 28 states have call successors, (28), 11 states have call predecessors, (28), 12 states have return successors, (29), 25 states have call predecessors, (29), 28 states have call successors, (29) [2022-11-25 18:34:42,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 685 states to 685 states and 870 transitions. [2022-11-25 18:34:42,928 INFO L78 Accepts]: Start accepts. Automaton has 685 states and 870 transitions. Word has length 114 [2022-11-25 18:34:42,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:34:42,929 INFO L495 AbstractCegarLoop]: Abstraction has 685 states and 870 transitions. [2022-11-25 18:34:42,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 5.947368421052632) internal successors, (113), 19 states have internal predecessors, (113), 3 states have call successors, (13), 2 states have call predecessors, (13), 6 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2022-11-25 18:34:42,929 INFO L276 IsEmpty]: Start isEmpty. Operand 685 states and 870 transitions. [2022-11-25 18:34:42,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-11-25 18:34:42,931 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:34:42,931 INFO L195 NwaCegarLoop]: trace histogram [15, 3, 3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:34:42,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 18:34:43,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 18:34:43,145 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION === [alt_freeErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-25 18:34:43,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:34:43,145 INFO L85 PathProgramCache]: Analyzing trace with hash 2029920984, now seen corresponding path program 3 times [2022-11-25 18:34:43,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:34:43,145 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618694497] [2022-11-25 18:34:43,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:34:43,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:34:43,236 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:34:43,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [427351819] [2022-11-25 18:34:43,238 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:34:43,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:34:43,239 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:34:43,240 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:34:43,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f6d067a7-7a51-4708-9a97-2438c5492bde/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process