./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/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_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/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_6653c15d-f668-4da2-871a-6179fd59749d/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 6698dfe763688c38a478c53cfe3bc6bac092e445bf13ef44be53eb6068218c93 --- 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 17:16:07,393 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:16:07,396 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:16:07,434 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:16:07,435 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:16:07,436 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:16:07,437 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:16:07,445 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:16:07,448 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:16:07,456 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:16:07,458 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:16:07,460 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:16:07,461 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:16:07,463 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:16:07,467 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:16:07,469 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:16:07,471 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:16:07,472 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:16:07,473 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:16:07,481 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:16:07,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:16:07,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:16:07,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:16:07,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:16:07,495 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:16:07,495 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:16:07,495 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:16:07,498 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:16:07,499 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:16:07,500 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:16:07,500 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:16:07,501 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:16:07,502 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:16:07,504 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:16:07,505 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:16:07,505 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:16:07,506 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:16:07,506 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:16:07,507 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:16:07,507 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:16:07,508 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:16:07,509 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:16:07,554 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:16:07,554 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:16:07,555 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:16:07,555 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:16:07,556 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:16:07,556 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:16:07,557 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:16:07,557 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:16:07,557 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:16:07,558 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:16:07,559 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:16:07,559 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:16:07,559 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:16:07,559 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:16:07,560 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:16:07,560 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:16:07,560 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:16:07,560 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:16:07,561 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:16:07,561 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:16:07,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:16:07,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:16:07,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:16:07,562 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:16:07,562 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:16:07,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:16:07,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:16:07,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:16:07,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:16:07,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:16:07,564 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:16:07,564 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:16:07,564 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:16:07,564 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:16:07,565 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_6653c15d-f668-4da2-871a-6179fd59749d/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6698dfe763688c38a478c53cfe3bc6bac092e445bf13ef44be53eb6068218c93 [2022-11-25 17:16:07,835 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:16:07,856 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:16:07,859 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:16:07,860 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:16:07,861 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:16:07,862 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i [2022-11-25 17:16:10,864 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:16:11,380 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:16:11,380 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i [2022-11-25 17:16:11,411 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/data/2d3575abf/92d65a71a442430793695299a0d4c98e/FLAGf548f1ef2 [2022-11-25 17:16:11,435 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/data/2d3575abf/92d65a71a442430793695299a0d4c98e [2022-11-25 17:16:11,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:16:11,440 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:16:11,441 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:16:11,442 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:16:11,446 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:16:11,447 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:16:11" (1/1) ... [2022-11-25 17:16:11,448 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6bbb1f32 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:11, skipping insertion in model container [2022-11-25 17:16:11,448 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:16:11" (1/1) ... [2022-11-25 17:16:11,458 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:16:11,533 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:16:12,105 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_6653c15d-f668-4da2-871a-6179fd59749d/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i[33021,33034] [2022-11-25 17:16:12,413 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 17:16:12,417 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_6653c15d-f668-4da2-871a-6179fd59749d/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i[84583,84596] [2022-11-25 17:16:12,429 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:16:12,440 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:16:12,474 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_6653c15d-f668-4da2-871a-6179fd59749d/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i[33021,33034] [2022-11-25 17:16:12,556 WARN L623 FunctionHandler]: Unknown extern function memcmp [2022-11-25 17:16:12,558 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_6653c15d-f668-4da2-871a-6179fd59749d/sv-benchmarks/c/uthash-2.0.2/uthash_BER_test9-1.i[84583,84596] [2022-11-25 17:16:12,560 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:16:12,594 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:16:12,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:12 WrapperNode [2022-11-25 17:16:12,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:16:12,596 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:16:12,596 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:16:12,596 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:16:12,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:12" (1/1) ... [2022-11-25 17:16:12,640 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:12" (1/1) ... [2022-11-25 17:16:12,746 INFO L138 Inliner]: procedures = 177, calls = 730, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 2860 [2022-11-25 17:16:12,746 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:16:12,747 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:16:12,747 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:16:12,747 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:16:12,758 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:12" (1/1) ... [2022-11-25 17:16:12,758 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:12" (1/1) ... [2022-11-25 17:16:12,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:12" (1/1) ... [2022-11-25 17:16:12,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:12" (1/1) ... [2022-11-25 17:16:12,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:12" (1/1) ... [2022-11-25 17:16:12,920 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:12" (1/1) ... [2022-11-25 17:16:12,926 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:12" (1/1) ... [2022-11-25 17:16:12,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:12" (1/1) ... [2022-11-25 17:16:12,956 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:16:12,957 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:16:12,957 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:16:12,957 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:16:12,958 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:12" (1/1) ... [2022-11-25 17:16:12,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:16:12,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:13,004 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:16:13,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:16:13,066 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-25 17:16:13,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 17:16:13,067 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 17:16:13,067 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-25 17:16:13,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.C_memset [2022-11-25 17:16:13,067 INFO L138 BoogieDeclarations]: Found implementation of procedure #Ultimate.C_memset [2022-11-25 17:16:13,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-11-25 17:16:13,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:16:13,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-11-25 17:16:13,068 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-25 17:16:13,068 INFO L130 BoogieDeclarations]: Found specification of procedure memcmp [2022-11-25 17:16:13,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-11-25 17:16:13,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-25 17:16:13,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:16:13,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:16:13,069 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:16:13,340 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:16:13,341 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:16:16,066 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:16:16,089 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:16:16,090 INFO L300 CfgBuilder]: Removed 54 assume(true) statements. [2022-11-25 17:16:16,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:16:16 BoogieIcfgContainer [2022-11-25 17:16:16,094 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:16:16,097 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:16:16,097 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:16:16,100 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:16:16,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:16:11" (1/3) ... [2022-11-25 17:16:16,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb8a339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:16:16, skipping insertion in model container [2022-11-25 17:16:16,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:16:12" (2/3) ... [2022-11-25 17:16:16,105 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bb8a339 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:16:16, skipping insertion in model container [2022-11-25 17:16:16,105 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:16:16" (3/3) ... [2022-11-25 17:16:16,107 INFO L112 eAbstractionObserver]: Analyzing ICFG uthash_BER_test9-1.i [2022-11-25 17:16:16,128 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:16:16,130 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-25 17:16:16,245 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:16:16,251 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;@21bcc719, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:16:16,252 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-25 17:16:16,261 INFO L276 IsEmpty]: Start isEmpty. Operand has 1165 states, 657 states have (on average 1.9238964992389649) internal successors, (1264), 1159 states have internal predecessors, (1264), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-25 17:16:16,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 17:16:16,267 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:16,268 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:16,269 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:16,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:16,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1311560150, now seen corresponding path program 1 times [2022-11-25 17:16:16,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:16,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77976681] [2022-11-25 17:16:16,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:16,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:16,492 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 17:16:16,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:16,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77976681] [2022-11-25 17:16:16,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77976681] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:16:16,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:16:16,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:16:16,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836356443] [2022-11-25 17:16:16,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:16:16,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:16:16,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:16,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:16:16,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:16:16,554 INFO L87 Difference]: Start difference. First operand has 1165 states, 657 states have (on average 1.9238964992389649) internal successors, (1264), 1159 states have internal predecessors, (1264), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 17:16:16,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:16,785 INFO L93 Difference]: Finished difference Result 2328 states and 5038 transitions. [2022-11-25 17:16:16,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:16:16,788 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 9 [2022-11-25 17:16:16,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:16,829 INFO L225 Difference]: With dead ends: 2328 [2022-11-25 17:16:16,829 INFO L226 Difference]: Without dead ends: 1161 [2022-11-25 17:16:16,844 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 17:16:16,848 INFO L413 NwaCegarLoop]: 2210 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, 2210 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 17:16:16,850 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 2210 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:16:16,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1161 states. [2022-11-25 17:16:17,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1161 to 1161. [2022-11-25 17:16:17,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1161 states, 654 states have (on average 1.834862385321101) internal successors, (1200), 1155 states have internal predecessors, (1200), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-25 17:16:17,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1161 states to 1161 states and 2206 transitions. [2022-11-25 17:16:17,306 INFO L78 Accepts]: Start accepts. Automaton has 1161 states and 2206 transitions. Word has length 9 [2022-11-25 17:16:17,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:17,307 INFO L495 AbstractCegarLoop]: Abstraction has 1161 states and 2206 transitions. [2022-11-25 17:16:17,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 17:16:17,307 INFO L276 IsEmpty]: Start isEmpty. Operand 1161 states and 2206 transitions. [2022-11-25 17:16:17,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-11-25 17:16:17,309 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:17,310 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] [2022-11-25 17:16:17,310 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-25 17:16:17,310 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:17,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:17,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1831599231, now seen corresponding path program 1 times [2022-11-25 17:16:17,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:17,311 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680119055] [2022-11-25 17:16:17,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:17,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:17,734 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 17:16:17,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:17,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680119055] [2022-11-25 17:16:17,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680119055] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:16:17,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:16:17,735 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:16:17,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897154794] [2022-11-25 17:16:17,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:16:17,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:16:17,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:17,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:16:17,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:16:17,745 INFO L87 Difference]: Start difference. First operand 1161 states and 2206 transitions. Second operand has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 17:16:19,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:19,131 INFO L93 Difference]: Finished difference Result 3331 states and 6426 transitions. [2022-11-25 17:16:19,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:16:19,132 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 44 [2022-11-25 17:16:19,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:19,179 INFO L225 Difference]: With dead ends: 3331 [2022-11-25 17:16:19,179 INFO L226 Difference]: Without dead ends: 2262 [2022-11-25 17:16:19,187 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 17:16:19,189 INFO L413 NwaCegarLoop]: 2669 mSDtfsCounter, 1129 mSDsluCounter, 4306 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1629 SdHoareTripleChecker+Valid, 6975 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:19,190 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1629 Valid, 6975 Invalid, 643 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-11-25 17:16:19,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2022-11-25 17:16:19,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 1163. [2022-11-25 17:16:19,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1163 states, 656 states have (on average 1.8323170731707317) internal successors, (1202), 1157 states have internal predecessors, (1202), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-25 17:16:19,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1163 states to 1163 states and 2208 transitions. [2022-11-25 17:16:19,613 INFO L78 Accepts]: Start accepts. Automaton has 1163 states and 2208 transitions. Word has length 44 [2022-11-25 17:16:19,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:19,614 INFO L495 AbstractCegarLoop]: Abstraction has 1163 states and 2208 transitions. [2022-11-25 17:16:19,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.0) internal successors, (44), 4 states have internal predecessors, (44), 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 17:16:19,614 INFO L276 IsEmpty]: Start isEmpty. Operand 1163 states and 2208 transitions. [2022-11-25 17:16:19,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-25 17:16:19,622 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:19,622 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:16:19,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-25 17:16:19,623 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:19,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:19,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1300600525, now seen corresponding path program 1 times [2022-11-25 17:16:19,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:19,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386741282] [2022-11-25 17:16:19,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:19,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:19,805 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:16:19,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1651089945] [2022-11-25 17:16:19,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:19,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:19,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:19,814 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:19,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:16:20,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:20,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 1649 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:16:20,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:20,514 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 17:16:20,514 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:16:20,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:20,514 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386741282] [2022-11-25 17:16:20,514 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:16:20,515 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651089945] [2022-11-25 17:16:20,515 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651089945] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:16:20,515 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:16:20,515 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:16:20,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548323230] [2022-11-25 17:16:20,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:16:20,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:16:20,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:20,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:16:20,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:16:20,517 INFO L87 Difference]: Start difference. First operand 1163 states and 2208 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 17:16:20,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:20,751 INFO L93 Difference]: Finished difference Result 2343 states and 4443 transitions. [2022-11-25 17:16:20,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:16:20,752 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 96 [2022-11-25 17:16:20,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:20,759 INFO L225 Difference]: With dead ends: 2343 [2022-11-25 17:16:20,760 INFO L226 Difference]: Without dead ends: 1184 [2022-11-25 17:16:20,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 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 17:16:20,765 INFO L413 NwaCegarLoop]: 2186 mSDtfsCounter, 9 mSDsluCounter, 2171 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 4357 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 17:16:20,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 4357 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:16:20,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1184 states. [2022-11-25 17:16:20,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1184 to 1183. [2022-11-25 17:16:20,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 676 states have (on average 1.8076923076923077) internal successors, (1222), 1177 states have internal predecessors, (1222), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-25 17:16:20,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 2228 transitions. [2022-11-25 17:16:20,927 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 2228 transitions. Word has length 96 [2022-11-25 17:16:20,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:20,928 INFO L495 AbstractCegarLoop]: Abstraction has 1183 states and 2228 transitions. [2022-11-25 17:16:20,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 17:16:20,928 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 2228 transitions. [2022-11-25 17:16:20,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-25 17:16:20,940 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:20,940 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:16:20,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:21,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2022-11-25 17:16:21,152 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:21,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:21,152 INFO L85 PathProgramCache]: Analyzing trace with hash 1273534923, now seen corresponding path program 1 times [2022-11-25 17:16:21,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:21,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887458361] [2022-11-25 17:16:21,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:21,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:21,332 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:16:21,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [439173800] [2022-11-25 17:16:21,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:21,332 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:21,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:21,334 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:21,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:16:22,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:22,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 1651 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:16:22,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:16:22,136 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:16:22,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:22,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887458361] [2022-11-25 17:16:22,141 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:16:22,142 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439173800] [2022-11-25 17:16:22,142 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439173800] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:16:22,144 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:16:22,145 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:16:22,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848423824] [2022-11-25 17:16:22,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:16:22,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:16:22,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:22,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:16:22,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:16:22,147 INFO L87 Difference]: Start difference. First operand 1183 states and 2228 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 17:16:22,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:22,318 INFO L93 Difference]: Finished difference Result 2272 states and 4345 transitions. [2022-11-25 17:16:22,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:16:22,326 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 96 [2022-11-25 17:16:22,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:22,333 INFO L225 Difference]: With dead ends: 2272 [2022-11-25 17:16:22,333 INFO L226 Difference]: Without dead ends: 1204 [2022-11-25 17:16:22,337 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 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 17:16:22,340 INFO L413 NwaCegarLoop]: 2186 mSDtfsCounter, 10 mSDsluCounter, 2171 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 4357 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 17:16:22,342 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 4357 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:16:22,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1204 states. [2022-11-25 17:16:22,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1204 to 1203. [2022-11-25 17:16:22,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1203 states, 696 states have (on average 1.7844827586206897) internal successors, (1242), 1197 states have internal predecessors, (1242), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-25 17:16:22,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1203 states to 1203 states and 2248 transitions. [2022-11-25 17:16:22,533 INFO L78 Accepts]: Start accepts. Automaton has 1203 states and 2248 transitions. Word has length 96 [2022-11-25 17:16:22,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:22,536 INFO L495 AbstractCegarLoop]: Abstraction has 1203 states and 2248 transitions. [2022-11-25 17:16:22,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 3 states have internal predecessors, (95), 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 17:16:22,537 INFO L276 IsEmpty]: Start isEmpty. Operand 1203 states and 2248 transitions. [2022-11-25 17:16:22,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-25 17:16:22,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:22,543 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:16:22,562 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-11-25 17:16:22,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:22,752 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:22,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:22,753 INFO L85 PathProgramCache]: Analyzing trace with hash 992737231, now seen corresponding path program 1 times [2022-11-25 17:16:22,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:22,753 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707594022] [2022-11-25 17:16:22,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:22,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:22,891 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:16:22,893 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [535571071] [2022-11-25 17:16:22,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:22,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:22,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:22,895 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:22,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:16:23,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:23,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 1655 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:16:23,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:23,799 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 17:16:23,799 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:16:23,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:23,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707594022] [2022-11-25 17:16:23,800 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:16:23,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535571071] [2022-11-25 17:16:23,800 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [535571071] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:16:23,800 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:16:23,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:16:23,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778220557] [2022-11-25 17:16:23,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:16:23,801 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:16:23,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:23,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:16:23,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:16:23,802 INFO L87 Difference]: Start difference. First operand 1203 states and 2248 transitions. Second operand has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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 17:16:23,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:23,949 INFO L93 Difference]: Finished difference Result 2394 states and 4484 transitions. [2022-11-25 17:16:23,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:16:23,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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 96 [2022-11-25 17:16:23,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:23,957 INFO L225 Difference]: With dead ends: 2394 [2022-11-25 17:16:23,957 INFO L226 Difference]: Without dead ends: 1195 [2022-11-25 17:16:23,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 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 17:16:23,963 INFO L413 NwaCegarLoop]: 2186 mSDtfsCounter, 1186 mSDsluCounter, 2694 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1689 SdHoareTripleChecker+Valid, 4880 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 17:16:23,964 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1689 Valid, 4880 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:16:23,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-11-25 17:16:24,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1189. [2022-11-25 17:16:24,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 682 states have (on average 1.7903225806451613) internal successors, (1221), 1183 states have internal predecessors, (1221), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-25 17:16:24,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 2227 transitions. [2022-11-25 17:16:24,191 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 2227 transitions. Word has length 96 [2022-11-25 17:16:24,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:24,192 INFO L495 AbstractCegarLoop]: Abstraction has 1189 states and 2227 transitions. [2022-11-25 17:16:24,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.0) internal successors, (96), 4 states have internal predecessors, (96), 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 17:16:24,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 2227 transitions. [2022-11-25 17:16:24,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-25 17:16:24,199 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:24,199 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:16:24,214 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:24,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:24,409 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:24,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:24,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1068361891, now seen corresponding path program 1 times [2022-11-25 17:16:24,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:24,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992334498] [2022-11-25 17:16:24,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:24,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:24,526 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:16:24,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [835696198] [2022-11-25 17:16:24,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:24,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:24,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:24,528 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:24,554 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:16:25,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:25,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 1641 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:16:25,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:16:25,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:16:25,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:25,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992334498] [2022-11-25 17:16:25,499 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:16:25,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835696198] [2022-11-25 17:16:25,500 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835696198] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:16:25,500 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:16:25,500 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:16:25,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024800629] [2022-11-25 17:16:25,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:16:25,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:16:25,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:25,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:16:25,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:16:25,502 INFO L87 Difference]: Start difference. First operand 1189 states and 2227 transitions. Second operand has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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 17:16:25,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:25,692 INFO L93 Difference]: Finished difference Result 2269 states and 4325 transitions. [2022-11-25 17:16:25,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:16:25,693 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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 96 [2022-11-25 17:16:25,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:25,701 INFO L225 Difference]: With dead ends: 2269 [2022-11-25 17:16:25,702 INFO L226 Difference]: Without dead ends: 1181 [2022-11-25 17:16:25,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 93 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 17:16:25,709 INFO L413 NwaCegarLoop]: 2177 mSDtfsCounter, 1078 mSDsluCounter, 2787 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1578 SdHoareTripleChecker+Valid, 4964 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 17:16:25,710 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1578 Valid, 4964 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:16:25,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2022-11-25 17:16:25,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 1175. [2022-11-25 17:16:25,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1175 states, 668 states have (on average 1.7964071856287425) internal successors, (1200), 1169 states have internal predecessors, (1200), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-25 17:16:25,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1175 states to 1175 states and 2206 transitions. [2022-11-25 17:16:25,948 INFO L78 Accepts]: Start accepts. Automaton has 1175 states and 2206 transitions. Word has length 96 [2022-11-25 17:16:25,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:25,948 INFO L495 AbstractCegarLoop]: Abstraction has 1175 states and 2206 transitions. [2022-11-25 17:16:25,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 23.75) internal successors, (95), 4 states have internal predecessors, (95), 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 17:16:25,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1175 states and 2206 transitions. [2022-11-25 17:16:25,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-25 17:16:25,949 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:25,950 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:16:25,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:26,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 17:16:26,163 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:26,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:26,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1951210737, now seen corresponding path program 1 times [2022-11-25 17:16:26,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:26,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789464346] [2022-11-25 17:16:26,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:26,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:26,280 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:16:26,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [766845624] [2022-11-25 17:16:26,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:26,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:26,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:26,282 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:26,302 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:16:27,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:27,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 1627 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:16:27,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:27,399 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 17:16:27,399 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:16:27,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:27,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789464346] [2022-11-25 17:16:27,399 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:16:27,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766845624] [2022-11-25 17:16:27,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766845624] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:16:27,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:16:27,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:16:27,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684022778] [2022-11-25 17:16:27,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:16:27,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-25 17:16:27,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:27,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-25 17:16:27,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-25 17:16:27,402 INFO L87 Difference]: Start difference. First operand 1175 states and 2206 transitions. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 17:16:27,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:27,603 INFO L93 Difference]: Finished difference Result 3442 states and 6516 transitions. [2022-11-25 17:16:27,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-25 17:16:27,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 96 [2022-11-25 17:16:27,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:27,618 INFO L225 Difference]: With dead ends: 3442 [2022-11-25 17:16:27,618 INFO L226 Difference]: Without dead ends: 2271 [2022-11-25 17:16:27,624 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 94 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 17:16:27,625 INFO L413 NwaCegarLoop]: 2733 mSDtfsCounter, 1065 mSDsluCounter, 2170 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1567 SdHoareTripleChecker+Valid, 4903 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:27,625 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1567 Valid, 4903 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:16:27,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2271 states. [2022-11-25 17:16:28,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2271 to 2269. [2022-11-25 17:16:28,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2269 states, 1262 states have (on average 1.8264659270998416) internal successors, (2305), 2263 states have internal predecessors, (2305), 1003 states have call successors, (1003), 2 states have call predecessors, (1003), 2 states have return successors, (1003), 5 states have call predecessors, (1003), 1003 states have call successors, (1003) [2022-11-25 17:16:28,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2269 states to 2269 states and 4311 transitions. [2022-11-25 17:16:28,101 INFO L78 Accepts]: Start accepts. Automaton has 2269 states and 4311 transitions. Word has length 96 [2022-11-25 17:16:28,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:28,101 INFO L495 AbstractCegarLoop]: Abstraction has 2269 states and 4311 transitions. [2022-11-25 17:16:28,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 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 17:16:28,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2269 states and 4311 transitions. [2022-11-25 17:16:28,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-11-25 17:16:28,103 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:28,103 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:16:28,128 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:16:28,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-25 17:16:28,324 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:28,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:28,324 INFO L85 PathProgramCache]: Analyzing trace with hash 969692797, now seen corresponding path program 1 times [2022-11-25 17:16:28,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:28,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085357720] [2022-11-25 17:16:28,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:28,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:28,410 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:16:28,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [225563735] [2022-11-25 17:16:28,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:28,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:28,411 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:28,412 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:28,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:16:29,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:16:29,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:16:29,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:16:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:16:29,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:16:29,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:16:29,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085357720] [2022-11-25 17:16:29,383 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:16:29,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225563735] [2022-11-25 17:16:29,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225563735] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:16:29,383 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:16:29,383 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:16:29,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417588796] [2022-11-25 17:16:29,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:16:29,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:16:29,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:16:29,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:16:29,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:16:29,386 INFO L87 Difference]: Start difference. First operand 2269 states and 4311 transitions. Second operand has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 17:16:31,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:16:31,022 INFO L93 Difference]: Finished difference Result 3440 states and 6513 transitions. [2022-11-25 17:16:31,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:16:31,027 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 111 [2022-11-25 17:16:31,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:16:31,036 INFO L225 Difference]: With dead ends: 3440 [2022-11-25 17:16:31,037 INFO L226 Difference]: Without dead ends: 1219 [2022-11-25 17:16:31,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 109 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 17:16:31,049 INFO L413 NwaCegarLoop]: 2196 mSDtfsCounter, 2248 mSDsluCounter, 1071 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 1003 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2248 SdHoareTripleChecker+Valid, 3267 SdHoareTripleChecker+Invalid, 1053 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1003 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:16:31,049 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2248 Valid, 3267 Invalid, 1053 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1003 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-25 17:16:31,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1219 states. [2022-11-25 17:16:31,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1219 to 1219. [2022-11-25 17:16:31,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1219 states, 712 states have (on average 1.7514044943820224) internal successors, (1247), 1213 states have internal predecessors, (1247), 503 states have call successors, (503), 2 states have call predecessors, (503), 2 states have return successors, (503), 4 states have call predecessors, (503), 503 states have call successors, (503) [2022-11-25 17:16:31,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1219 states to 1219 states and 2253 transitions. [2022-11-25 17:16:31,379 INFO L78 Accepts]: Start accepts. Automaton has 1219 states and 2253 transitions. Word has length 111 [2022-11-25 17:16:31,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:16:31,381 INFO L495 AbstractCegarLoop]: Abstraction has 1219 states and 2253 transitions. [2022-11-25 17:16:31,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-25 17:16:31,382 INFO L276 IsEmpty]: Start isEmpty. Operand 1219 states and 2253 transitions. [2022-11-25 17:16:31,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-11-25 17:16:31,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:16:31,384 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 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 17:16:31,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-25 17:16:31,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:31,594 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:16:31,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:16:31,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1641582604, now seen corresponding path program 1 times [2022-11-25 17:16:31,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:16:31,595 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642612040] [2022-11-25 17:16:31,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:31,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:16:31,661 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:16:31,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [533442570] [2022-11-25 17:16:31,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:16:31,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:16:31,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:16:31,663 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:16:31,686 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:17:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:00,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 790 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 17:17:00,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:00,847 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:17:00,847 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:17:00,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:00,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642612040] [2022-11-25 17:17:00,848 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:17:00,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533442570] [2022-11-25 17:17:00,848 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533442570] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:17:00,848 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:17:00,848 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-25 17:17:00,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012880821] [2022-11-25 17:17:00,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:17:00,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:17:00,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:00,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:17:00,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:17:00,851 INFO L87 Difference]: Start difference. First operand 1219 states and 2253 transitions. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:17:01,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:01,005 INFO L93 Difference]: Finished difference Result 2390 states and 4455 transitions. [2022-11-25 17:17:01,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:17:01,006 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) Word has length 118 [2022-11-25 17:17:01,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:01,014 INFO L225 Difference]: With dead ends: 2390 [2022-11-25 17:17:01,015 INFO L226 Difference]: Without dead ends: 1222 [2022-11-25 17:17:01,021 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 115 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 17:17:01,021 INFO L413 NwaCegarLoop]: 2188 mSDtfsCounter, 2 mSDsluCounter, 4372 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 6560 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:01,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 6560 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:17:01,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2022-11-25 17:17:01,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1222. [2022-11-25 17:17:01,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1222 states, 714 states have (on average 1.7507002801120448) internal successors, (1250), 1216 states have internal predecessors, (1250), 503 states have call successors, (503), 2 states have call predecessors, (503), 3 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2022-11-25 17:17:01,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1222 states to 1222 states and 2257 transitions. [2022-11-25 17:17:01,379 INFO L78 Accepts]: Start accepts. Automaton has 1222 states and 2257 transitions. Word has length 118 [2022-11-25 17:17:01,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:01,379 INFO L495 AbstractCegarLoop]: Abstraction has 1222 states and 2257 transitions. [2022-11-25 17:17:01,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 1 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:17:01,380 INFO L276 IsEmpty]: Start isEmpty. Operand 1222 states and 2257 transitions. [2022-11-25 17:17:01,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-11-25 17:17:01,381 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:01,381 INFO L195 NwaCegarLoop]: trace histogram [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, 1, 1, 1, 1, 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 17:17:01,407 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:01,582 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:01,583 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:01,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:01,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1491787986, now seen corresponding path program 1 times [2022-11-25 17:17:01,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:01,583 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277765985] [2022-11-25 17:17:01,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:01,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:01,660 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:17:01,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1674441821] [2022-11-25 17:17:01,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:01,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:01,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:01,662 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:01,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:17:31,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:17:31,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-25 17:17:31,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-25 17:17:31,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:31,278 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-25 17:17:31,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:31,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277765985] [2022-11-25 17:17:31,278 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:17:31,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674441821] [2022-11-25 17:17:31,279 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674441821] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:31,279 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:17:31,279 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2022-11-25 17:17:31,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870124593] [2022-11-25 17:17:31,279 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:31,280 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:17:31,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:31,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:17:31,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:17:31,281 INFO L87 Difference]: Start difference. First operand 1222 states and 2257 transitions. Second operand has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 17:17:31,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:31,542 INFO L93 Difference]: Finished difference Result 2404 states and 4476 transitions. [2022-11-25 17:17:31,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-25 17:17:31,543 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 120 [2022-11-25 17:17:31,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:31,550 INFO L225 Difference]: With dead ends: 2404 [2022-11-25 17:17:31,550 INFO L226 Difference]: Without dead ends: 1231 [2022-11-25 17:17:31,555 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:17:31,556 INFO L413 NwaCegarLoop]: 2188 mSDtfsCounter, 9 mSDsluCounter, 6552 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 8740 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:31,556 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 8740 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:17:31,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1231 states. [2022-11-25 17:17:31,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1231 to 1231. [2022-11-25 17:17:31,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 722 states have (on average 1.7479224376731302) internal successors, (1262), 1224 states have internal predecessors, (1262), 503 states have call successors, (503), 3 states have call predecessors, (503), 4 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2022-11-25 17:17:31,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 2269 transitions. [2022-11-25 17:17:31,920 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 2269 transitions. Word has length 120 [2022-11-25 17:17:31,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:31,920 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 2269 transitions. [2022-11-25 17:17:31,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.5) internal successors, (124), 8 states have internal predecessors, (124), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 17:17:31,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 2269 transitions. [2022-11-25 17:17:31,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-11-25 17:17:31,922 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:31,922 INFO L195 NwaCegarLoop]: trace histogram [6, 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, 1, 1, 1, 1, 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 17:17:31,949 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:32,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 17:17:32,139 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:32,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:32,139 INFO L85 PathProgramCache]: Analyzing trace with hash -478386740, now seen corresponding path program 2 times [2022-11-25 17:17:32,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:32,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151274785] [2022-11-25 17:17:32,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:32,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:32,197 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:17:32,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1134232056] [2022-11-25 17:17:32,198 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:17:32,198 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:32,198 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:32,199 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:32,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:17:33,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:17:33,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:17:33,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 880 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 17:17:33,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:17:33,489 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 20 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-11-25 17:17:33,490 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:17:33,831 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:17:33,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:17:33,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151274785] [2022-11-25 17:17:33,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:17:33,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134232056] [2022-11-25 17:17:33,831 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134232056] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:17:33,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:17:33,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2022-11-25 17:17:33,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313449018] [2022-11-25 17:17:33,832 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:17:33,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:17:33,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:17:33,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:17:33,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:17:33,834 INFO L87 Difference]: Start difference. First operand 1231 states and 2269 transitions. Second operand has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 17:17:35,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:17:35,396 INFO L93 Difference]: Finished difference Result 2422 states and 4501 transitions. [2022-11-25 17:17:35,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 17:17:35,397 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 124 [2022-11-25 17:17:35,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:17:35,404 INFO L225 Difference]: With dead ends: 2422 [2022-11-25 17:17:35,405 INFO L226 Difference]: Without dead ends: 1242 [2022-11-25 17:17:35,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 233 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2022-11-25 17:17:35,412 INFO L413 NwaCegarLoop]: 2189 mSDtfsCounter, 21 mSDsluCounter, 13102 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 15291 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-25 17:17:35,413 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 15291 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-25 17:17:35,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2022-11-25 17:17:35,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1240. [2022-11-25 17:17:35,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 731 states have (on average 1.7387140902872777) internal successors, (1271), 1233 states have internal predecessors, (1271), 503 states have call successors, (503), 3 states have call predecessors, (503), 4 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2022-11-25 17:17:35,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 2278 transitions. [2022-11-25 17:17:35,672 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 2278 transitions. Word has length 124 [2022-11-25 17:17:35,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:17:35,672 INFO L495 AbstractCegarLoop]: Abstraction has 1240 states and 2278 transitions. [2022-11-25 17:17:35,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 8.8) internal successors, (132), 15 states have internal predecessors, (132), 2 states have call successors, (3), 2 states have call predecessors, (3), 4 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 17:17:35,673 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 2278 transitions. [2022-11-25 17:17:35,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-11-25 17:17:35,674 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:17:35,675 INFO L195 NwaCegarLoop]: trace histogram [12, 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, 1, 1, 1, 1, 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 17:17:35,695 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:17:35,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:35,891 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:17:35,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:17:35,892 INFO L85 PathProgramCache]: Analyzing trace with hash 711673676, now seen corresponding path program 3 times [2022-11-25 17:17:35,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:17:35,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787185995] [2022-11-25 17:17:35,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:17:35,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:17:35,965 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:17:35,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2035661361] [2022-11-25 17:17:35,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:17:35,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:17:35,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:17:35,967 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:17:35,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:24:44,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 17:24:44,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:24:44,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-25 17:24:44,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:24:44,610 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-25 17:24:44,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:24:44,758 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 37 proven. 3 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-25 17:24:44,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:24:44,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787185995] [2022-11-25 17:24:44,759 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:24:44,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035661361] [2022-11-25 17:24:44,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035661361] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:24:44,759 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:24:44,759 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2022-11-25 17:24:44,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153900691] [2022-11-25 17:24:44,760 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:24:44,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-25 17:24:44,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:24:44,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-25 17:24:44,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:24:44,763 INFO L87 Difference]: Start difference. First operand 1240 states and 2278 transitions. Second operand has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 17:24:45,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:24:45,184 INFO L93 Difference]: Finished difference Result 2417 states and 4487 transitions. [2022-11-25 17:24:45,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-25 17:24:45,185 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 130 [2022-11-25 17:24:45,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:24:45,193 INFO L225 Difference]: With dead ends: 2417 [2022-11-25 17:24:45,193 INFO L226 Difference]: Without dead ends: 1243 [2022-11-25 17:24:45,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:24:45,200 INFO L413 NwaCegarLoop]: 2187 mSDtfsCounter, 13 mSDsluCounter, 8737 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 10924 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:24:45,201 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 10924 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:24:45,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1243 states. [2022-11-25 17:24:45,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1243 to 1241. [2022-11-25 17:24:45,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1241 states, 732 states have (on average 1.7363387978142077) internal successors, (1271), 1234 states have internal predecessors, (1271), 503 states have call successors, (503), 3 states have call predecessors, (503), 4 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2022-11-25 17:24:45,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1241 states to 1241 states and 2278 transitions. [2022-11-25 17:24:45,445 INFO L78 Accepts]: Start accepts. Automaton has 1241 states and 2278 transitions. Word has length 130 [2022-11-25 17:24:45,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:24:45,445 INFO L495 AbstractCegarLoop]: Abstraction has 1241 states and 2278 transitions. [2022-11-25 17:24:45,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.2) internal successors, (122), 10 states have internal predecessors, (122), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 17:24:45,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1241 states and 2278 transitions. [2022-11-25 17:24:45,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-25 17:24:45,447 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:24:45,447 INFO L195 NwaCegarLoop]: trace histogram [16, 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, 1, 1, 1, 1, 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 17:24:45,562 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 17:24:45,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-25 17:24:45,671 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:24:45,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:24:45,671 INFO L85 PathProgramCache]: Analyzing trace with hash -756064052, now seen corresponding path program 4 times [2022-11-25 17:24:45,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:24:45,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395405961] [2022-11-25 17:24:45,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:24:45,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:24:45,759 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:24:45,760 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1900562196] [2022-11-25 17:24:45,760 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 17:24:45,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:24:45,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:24:45,761 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:24:45,791 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 17:28:36,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 17:28:36,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:28:36,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 1030 conjuncts, 39 conjunts are in the unsatisfiable core [2022-11-25 17:28:36,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:28:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 34 proven. 112 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 17:28:36,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:28:37,230 INFO L134 CoverageAnalysis]: Checked inductivity of 158 backedges. 81 proven. 21 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2022-11-25 17:28:37,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:28:37,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395405961] [2022-11-25 17:28:37,230 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:28:37,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900562196] [2022-11-25 17:28:37,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900562196] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:28:37,231 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:28:37,231 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2022-11-25 17:28:37,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723440370] [2022-11-25 17:28:37,231 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:28:37,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 17:28:37,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:28:37,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 17:28:37,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2022-11-25 17:28:37,233 INFO L87 Difference]: Start difference. First operand 1241 states and 2278 transitions. Second operand has 23 states, 23 states have (on average 6.565217391304348) internal successors, (151), 23 states have internal predecessors, (151), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 17:28:41,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:28:41,923 INFO L93 Difference]: Finished difference Result 2469 states and 4547 transitions. [2022-11-25 17:28:41,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-11-25 17:28:41,924 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 6.565217391304348) internal successors, (151), 23 states have internal predecessors, (151), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 134 [2022-11-25 17:28:41,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:28:41,935 INFO L225 Difference]: With dead ends: 2469 [2022-11-25 17:28:41,935 INFO L226 Difference]: Without dead ends: 1233 [2022-11-25 17:28:41,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=437, Invalid=1123, Unknown=0, NotChecked=0, Total=1560 [2022-11-25 17:28:41,940 INFO L413 NwaCegarLoop]: 2164 mSDtfsCounter, 1185 mSDsluCounter, 23270 mSDsCounter, 0 mSdLazyCounter, 933 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1690 SdHoareTripleChecker+Valid, 25434 SdHoareTripleChecker+Invalid, 959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 933 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-11-25 17:28:41,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1690 Valid, 25434 Invalid, 959 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [26 Valid, 933 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-11-25 17:28:41,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2022-11-25 17:28:42,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 1231. [2022-11-25 17:28:42,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 722 states have (on average 1.7409972299168974) internal successors, (1257), 1224 states have internal predecessors, (1257), 503 states have call successors, (503), 3 states have call predecessors, (503), 4 states have return successors, (504), 4 states have call predecessors, (504), 503 states have call successors, (504) [2022-11-25 17:28:42,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 2264 transitions. [2022-11-25 17:28:42,166 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 2264 transitions. Word has length 134 [2022-11-25 17:28:42,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:28:42,167 INFO L495 AbstractCegarLoop]: Abstraction has 1231 states and 2264 transitions. [2022-11-25 17:28:42,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 6.565217391304348) internal successors, (151), 23 states have internal predecessors, (151), 1 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-25 17:28:42,167 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 2264 transitions. [2022-11-25 17:28:42,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-11-25 17:28:42,169 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:28:42,169 INFO L195 NwaCegarLoop]: trace histogram [24, 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, 1, 1, 1, 1, 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 17:28:42,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 17:28:42,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-25 17:28:42,383 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:28:42,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:28:42,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1235397684, now seen corresponding path program 5 times [2022-11-25 17:28:42,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:28:42,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85064799] [2022-11-25 17:28:42,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:28:42,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:28:42,458 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:28:42,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1475547899] [2022-11-25 17:28:42,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-25 17:28:42,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:28:42,459 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:28:42,460 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:28:42,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6653c15d-f668-4da2-871a-6179fd59749d/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process