./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-simple/nested_6.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-simple/nested_6.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash e0e55420715ff80c27c9ff14eb8ac6a520210206e33b4fd081fea4bf1c2e05be --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-5e519f3 [2022-11-02 21:07:03,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:07:03,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:07:03,727 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:07:03,727 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:07:03,732 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:07:03,735 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:07:03,740 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:07:03,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:07:03,745 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:07:03,746 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:07:03,747 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:07:03,747 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:07:03,749 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:07:03,750 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:07:03,751 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:07:03,752 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:07:03,753 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:07:03,755 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:07:03,768 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:07:03,772 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:07:03,777 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:07:03,778 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:07:03,779 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:07:03,783 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:07:03,783 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:07:03,783 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:07:03,784 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:07:03,785 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:07:03,786 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:07:03,786 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:07:03,787 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:07:03,789 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:07:03,792 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:07:03,793 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:07:03,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:07:03,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:07:03,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:07:03,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:07:03,795 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:07:03,796 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:07:03,797 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 21:07:03,827 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:07:03,827 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:07:03,828 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:07:03,828 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:07:03,829 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:07:03,829 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:07:03,830 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:07:03,830 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:07:03,830 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:07:03,830 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:07:03,831 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:07:03,831 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:07:03,831 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:07:03,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:07:03,832 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:07:03,832 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:07:03,832 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:07:03,832 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:07:03,833 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:07:03,833 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:07:03,833 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:07:03,833 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:07:03,834 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:07:03,834 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:07:03,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:07:03,834 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:07:03,834 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:07:03,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:07:03,835 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:07:03,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:07:03,835 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:07:03,836 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:07:03,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:07:03,836 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e0e55420715ff80c27c9ff14eb8ac6a520210206e33b4fd081fea4bf1c2e05be [2022-11-02 21:07:04,112 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:07:04,135 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:07:04,146 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:07:04,147 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:07:04,148 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:07:04,150 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/loop-simple/nested_6.c [2022-11-02 21:07:04,228 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/data/97837e975/bcc7896622f348c2a15aef74ee8e007b/FLAGd1e7f131e [2022-11-02 21:07:04,733 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:07:04,734 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/sv-benchmarks/c/loop-simple/nested_6.c [2022-11-02 21:07:04,742 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/data/97837e975/bcc7896622f348c2a15aef74ee8e007b/FLAGd1e7f131e [2022-11-02 21:07:05,103 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/data/97837e975/bcc7896622f348c2a15aef74ee8e007b [2022-11-02 21:07:05,109 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:07:05,113 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:07:05,117 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:07:05,117 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:07:05,121 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:07:05,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:07:05" (1/1) ... [2022-11-02 21:07:05,124 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c12c3d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:05, skipping insertion in model container [2022-11-02 21:07:05,124 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:07:05" (1/1) ... [2022-11-02 21:07:05,133 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:07:05,148 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:07:05,379 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/sv-benchmarks/c/loop-simple/nested_6.c[959,972] [2022-11-02 21:07:05,384 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:07:05,394 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:07:05,419 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/sv-benchmarks/c/loop-simple/nested_6.c[959,972] [2022-11-02 21:07:05,425 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:07:05,442 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:07:05,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:05 WrapperNode [2022-11-02 21:07:05,443 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:07:05,444 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:07:05,445 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:07:05,445 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:07:05,453 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:05" (1/1) ... [2022-11-02 21:07:05,462 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:05" (1/1) ... [2022-11-02 21:07:05,489 INFO L138 Inliner]: procedures = 10, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 68 [2022-11-02 21:07:05,490 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:07:05,491 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:07:05,491 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:07:05,491 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:07:05,501 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:05" (1/1) ... [2022-11-02 21:07:05,501 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:05" (1/1) ... [2022-11-02 21:07:05,514 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:05" (1/1) ... [2022-11-02 21:07:05,514 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:05" (1/1) ... [2022-11-02 21:07:05,517 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:05" (1/1) ... [2022-11-02 21:07:05,524 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:05" (1/1) ... [2022-11-02 21:07:05,525 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:05" (1/1) ... [2022-11-02 21:07:05,526 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:05" (1/1) ... [2022-11-02 21:07:05,528 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:07:05,529 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:07:05,529 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:07:05,529 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:07:05,532 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:05" (1/1) ... [2022-11-02 21:07:05,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:07:05,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:07:05,569 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:07:05,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:07:05,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:07:05,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:07:05,633 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:07:05,633 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:07:05,711 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:07:05,713 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:07:05,851 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:07:05,858 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:07:05,858 INFO L300 CfgBuilder]: Removed 6 assume(true) statements. [2022-11-02 21:07:05,860 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:07:05 BoogieIcfgContainer [2022-11-02 21:07:05,861 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:07:05,863 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:07:05,863 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:07:05,867 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:07:05,868 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:07:05" (1/3) ... [2022-11-02 21:07:05,868 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aea4d1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:07:05, skipping insertion in model container [2022-11-02 21:07:05,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:07:05" (2/3) ... [2022-11-02 21:07:05,869 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7aea4d1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:07:05, skipping insertion in model container [2022-11-02 21:07:05,869 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:07:05" (3/3) ... [2022-11-02 21:07:05,871 INFO L112 eAbstractionObserver]: Analyzing ICFG nested_6.c [2022-11-02 21:07:05,890 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:07:05,890 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:07:05,944 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:07:05,952 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;@7bd10d04, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:07:05,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 21:07:05,965 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 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) [2022-11-02 21:07:05,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-02 21:07:05,972 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:07:05,973 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-02 21:07:05,974 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:07:05,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:05,979 INFO L85 PathProgramCache]: Analyzing trace with hash 28698918, now seen corresponding path program 1 times [2022-11-02 21:07:05,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:05,987 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774166516] [2022-11-02 21:07:05,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:05,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:06,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:06,178 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:07:06,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:06,179 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774166516] [2022-11-02 21:07:06,180 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [774166516] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:06,180 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:06,181 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:07:06,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809606639] [2022-11-02 21:07:06,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:06,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:07:06,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:06,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:07:06,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:07:06,275 INFO L87 Difference]: Start difference. First operand has 21 states, 19 states have (on average 1.736842105263158) internal successors, (33), 20 states have internal predecessors, (33), 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) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-02 21:07:06,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:07:06,336 INFO L93 Difference]: Finished difference Result 52 states and 88 transitions. [2022-11-02 21:07:06,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:07:06,354 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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 5 [2022-11-02 21:07:06,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:07:06,362 INFO L225 Difference]: With dead ends: 52 [2022-11-02 21:07:06,363 INFO L226 Difference]: Without dead ends: 29 [2022-11-02 21:07:06,366 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:07:06,386 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 16 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:07:06,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 44 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:07:06,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-02 21:07:06,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 18. [2022-11-02 21:07:06,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 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) [2022-11-02 21:07:06,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2022-11-02 21:07:06,438 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 5 [2022-11-02 21:07:06,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:07:06,438 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2022-11-02 21:07:06,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 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) [2022-11-02 21:07:06,439 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2022-11-02 21:07:06,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-02 21:07:06,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:07:06,456 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:07:06,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-02 21:07:06,457 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:07:06,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:06,458 INFO L85 PathProgramCache]: Analyzing trace with hash 270775882, now seen corresponding path program 1 times [2022-11-02 21:07:06,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:06,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755880111] [2022-11-02 21:07:06,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:06,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:06,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:06,535 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:07:06,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:06,536 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755880111] [2022-11-02 21:07:06,536 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755880111] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:06,537 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:06,537 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:07:06,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760574102] [2022-11-02 21:07:06,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:06,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:07:06,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:06,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:07:06,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:07:06,540 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:06,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:07:06,560 INFO L93 Difference]: Finished difference Result 43 states and 58 transitions. [2022-11-02 21:07:06,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:07:06,561 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-02 21:07:06,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:07:06,561 INFO L225 Difference]: With dead ends: 43 [2022-11-02 21:07:06,562 INFO L226 Difference]: Without dead ends: 28 [2022-11-02 21:07:06,562 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:07:06,564 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:07:06,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:07:06,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-02 21:07:06,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2022-11-02 21:07:06,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 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) [2022-11-02 21:07:06,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2022-11-02 21:07:06,570 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 8 [2022-11-02 21:07:06,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:07:06,571 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2022-11-02 21:07:06,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:07:06,571 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2022-11-02 21:07:06,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-02 21:07:06,575 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:07:06,576 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:07:06,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 21:07:06,579 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:07:06,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:06,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1936160826, now seen corresponding path program 1 times [2022-11-02 21:07:06,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:06,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636843724] [2022-11-02 21:07:06,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:06,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:06,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:06,657 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:07:06,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:06,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636843724] [2022-11-02 21:07:06,658 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636843724] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:06,658 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:06,658 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:07:06,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325438817] [2022-11-02 21:07:06,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:06,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:07:06,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:06,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:07:06,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:07:06,661 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-02 21:07:06,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:07:06,680 INFO L93 Difference]: Finished difference Result 43 states and 57 transitions. [2022-11-02 21:07:06,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:07:06,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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 11 [2022-11-02 21:07:06,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:07:06,682 INFO L225 Difference]: With dead ends: 43 [2022-11-02 21:07:06,682 INFO L226 Difference]: Without dead ends: 27 [2022-11-02 21:07:06,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:07:06,684 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 10 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:07:06,684 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:07:06,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-11-02 21:07:06,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 20. [2022-11-02 21:07:06,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 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) [2022-11-02 21:07:06,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2022-11-02 21:07:06,690 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2022-11-02 21:07:06,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:07:06,690 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2022-11-02 21:07:06,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 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) [2022-11-02 21:07:06,691 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2022-11-02 21:07:06,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-02 21:07:06,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:07:06,698 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:07:06,699 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-02 21:07:06,699 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:07:06,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:06,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1227454858, now seen corresponding path program 1 times [2022-11-02 21:07:06,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:06,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837855729] [2022-11-02 21:07:06,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:06,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:06,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:06,786 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:07:06,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:06,787 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837855729] [2022-11-02 21:07:06,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837855729] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:06,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:06,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:07:06,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100545205] [2022-11-02 21:07:06,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:06,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:07:06,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:06,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:07:06,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:07:06,790 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-11-02 21:07:06,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:07:06,817 INFO L93 Difference]: Finished difference Result 43 states and 56 transitions. [2022-11-02 21:07:06,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:07:06,820 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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 14 [2022-11-02 21:07:06,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:07:06,821 INFO L225 Difference]: With dead ends: 43 [2022-11-02 21:07:06,822 INFO L226 Difference]: Without dead ends: 26 [2022-11-02 21:07:06,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:07:06,824 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:07:06,828 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:07:06,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-02 21:07:06,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 21. [2022-11-02 21:07:06,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 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) [2022-11-02 21:07:06,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2022-11-02 21:07:06,843 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 14 [2022-11-02 21:07:06,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:07:06,843 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2022-11-02 21:07:06,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 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) [2022-11-02 21:07:06,844 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2022-11-02 21:07:06,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-11-02 21:07:06,845 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:07:06,845 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:07:06,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 21:07:06,845 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:07:06,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:06,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1691120258, now seen corresponding path program 1 times [2022-11-02 21:07:06,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:06,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [681629476] [2022-11-02 21:07:06,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:06,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:06,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:06,956 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:07:06,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:06,956 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [681629476] [2022-11-02 21:07:06,957 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [681629476] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:06,957 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:06,957 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:07:06,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366924232] [2022-11-02 21:07:06,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:06,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:07:06,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:06,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:07:06,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:07:06,960 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2022-11-02 21:07:06,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:07:06,991 INFO L93 Difference]: Finished difference Result 43 states and 55 transitions. [2022-11-02 21:07:06,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:07:06,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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 17 [2022-11-02 21:07:06,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:07:06,992 INFO L225 Difference]: With dead ends: 43 [2022-11-02 21:07:06,992 INFO L226 Difference]: Without dead ends: 25 [2022-11-02 21:07:06,993 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:07:06,994 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:07:06,995 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:07:06,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-11-02 21:07:06,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2022-11-02 21:07:07,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 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) [2022-11-02 21:07:07,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2022-11-02 21:07:07,001 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 17 [2022-11-02 21:07:07,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:07:07,001 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2022-11-02 21:07:07,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 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) [2022-11-02 21:07:07,002 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2022-11-02 21:07:07,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-02 21:07:07,003 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:07:07,003 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] [2022-11-02 21:07:07,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-02 21:07:07,004 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:07:07,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:07,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1077656366, now seen corresponding path program 1 times [2022-11-02 21:07:07,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:07,005 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994076789] [2022-11-02 21:07:07,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:07,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:07,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:07:07,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:07,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994076789] [2022-11-02 21:07:07,062 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994076789] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:07:07,062 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:07:07,062 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 21:07:07,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105808852] [2022-11-02 21:07:07,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:07:07,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-02 21:07:07,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:07,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-02 21:07:07,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:07:07,064 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2022-11-02 21:07:07,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:07:07,080 INFO L93 Difference]: Finished difference Result 43 states and 54 transitions. [2022-11-02 21:07:07,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-02 21:07:07,101 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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 20 [2022-11-02 21:07:07,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:07:07,102 INFO L225 Difference]: With dead ends: 43 [2022-11-02 21:07:07,103 INFO L226 Difference]: Without dead ends: 24 [2022-11-02 21:07:07,103 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-02 21:07:07,113 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 1 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:07:07,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:07:07,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-02 21:07:07,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2022-11-02 21:07:07,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 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) [2022-11-02 21:07:07,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2022-11-02 21:07:07,129 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 20 [2022-11-02 21:07:07,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:07:07,129 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2022-11-02 21:07:07,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.666666666666667) internal successors, (20), 3 states have internal predecessors, (20), 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) [2022-11-02 21:07:07,130 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2022-11-02 21:07:07,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-02 21:07:07,130 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:07:07,131 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] [2022-11-02 21:07:07,131 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-02 21:07:07,131 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:07:07,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:07,132 INFO L85 PathProgramCache]: Analyzing trace with hash -624839792, now seen corresponding path program 1 times [2022-11-02 21:07:07,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:07,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171967565] [2022-11-02 21:07:07,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:07,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:07,187 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:07:07,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:07,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171967565] [2022-11-02 21:07:07,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171967565] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:07:07,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183986310] [2022-11-02 21:07:07,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:07,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:07:07,189 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:07:07,191 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:07:07,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 21:07:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:07,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 21:07:07,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:07:07,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:07:07,358 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:07:07,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:07:07,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183986310] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:07:07,408 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:07:07,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2022-11-02 21:07:07,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335457341] [2022-11-02 21:07:07,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:07:07,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:07:07,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:07,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:07:07,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:07:07,414 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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) [2022-11-02 21:07:07,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:07:07,486 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2022-11-02 21:07:07,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 21:07:07,486 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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 22 [2022-11-02 21:07:07,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:07:07,487 INFO L225 Difference]: With dead ends: 49 [2022-11-02 21:07:07,487 INFO L226 Difference]: Without dead ends: 29 [2022-11-02 21:07:07,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:07:07,488 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 4 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:07:07,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 84 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:07:07,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-02 21:07:07,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-02 21:07:07,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 28 states have internal predecessors, (34), 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) [2022-11-02 21:07:07,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2022-11-02 21:07:07,500 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 22 [2022-11-02 21:07:07,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:07:07,500 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2022-11-02 21:07:07,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 7 states have internal predecessors, (29), 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) [2022-11-02 21:07:07,501 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2022-11-02 21:07:07,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 21:07:07,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:07:07,503 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:07:07,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 21:07:07,729 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-02 21:07:07,730 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:07:07,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:07,730 INFO L85 PathProgramCache]: Analyzing trace with hash -222481718, now seen corresponding path program 2 times [2022-11-02 21:07:07,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:07,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198185977] [2022-11-02 21:07:07,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:07,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:07,814 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-02 21:07:07,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:07,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198185977] [2022-11-02 21:07:07,815 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198185977] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:07:07,815 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785624309] [2022-11-02 21:07:07,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:07:07,815 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:07:07,815 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:07:07,816 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:07:07,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 21:07:07,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:07:07,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:07:07,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-02 21:07:07,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:07:07,979 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:07:07,979 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:07:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:07:08,061 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785624309] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:07:08,061 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:07:08,061 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 10 [2022-11-02 21:07:08,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110219871] [2022-11-02 21:07:08,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:07:08,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:07:08,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:08,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:07:08,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:07:08,063 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 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) [2022-11-02 21:07:08,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:07:08,323 INFO L93 Difference]: Finished difference Result 88 states and 107 transitions. [2022-11-02 21:07:08,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:07:08,324 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 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 28 [2022-11-02 21:07:08,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:07:08,325 INFO L225 Difference]: With dead ends: 88 [2022-11-02 21:07:08,325 INFO L226 Difference]: Without dead ends: 62 [2022-11-02 21:07:08,327 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 46 SyntacticMatches, 4 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2022-11-02 21:07:08,328 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 36 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:07:08,328 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 91 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:07:08,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-11-02 21:07:08,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 48. [2022-11-02 21:07:08,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 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) [2022-11-02 21:07:08,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2022-11-02 21:07:08,337 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 28 [2022-11-02 21:07:08,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:07:08,337 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2022-11-02 21:07:08,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 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) [2022-11-02 21:07:08,338 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2022-11-02 21:07:08,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-11-02 21:07:08,339 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:07:08,339 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:07:08,386 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:07:08,564 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:07:08,564 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:07:08,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:08,565 INFO L85 PathProgramCache]: Analyzing trace with hash 1455035518, now seen corresponding path program 3 times [2022-11-02 21:07:08,565 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:08,565 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125818854] [2022-11-02 21:07:08,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:08,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:08,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:08,689 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 161 trivial. 0 not checked. [2022-11-02 21:07:08,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:08,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125818854] [2022-11-02 21:07:08,690 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125818854] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:07:08,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852880941] [2022-11-02 21:07:08,691 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:07:08,691 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:07:08,691 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:07:08,693 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:07:08,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 21:07:08,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-02 21:07:08,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:07:08,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 21:07:08,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:07:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-11-02 21:07:08,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:07:08,942 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2022-11-02 21:07:08,943 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852880941] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:07:08,943 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:07:08,943 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2022-11-02 21:07:08,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122052061] [2022-11-02 21:07:08,944 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:07:08,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:07:08,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:08,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:07:08,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:07:08,945 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2022-11-02 21:07:09,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:07:09,096 INFO L93 Difference]: Finished difference Result 479 states and 540 transitions. [2022-11-02 21:07:09,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 21:07:09,098 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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 47 [2022-11-02 21:07:09,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:07:09,100 INFO L225 Difference]: With dead ends: 479 [2022-11-02 21:07:09,101 INFO L226 Difference]: Without dead ends: 434 [2022-11-02 21:07:09,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2022-11-02 21:07:09,102 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 176 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:07:09,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [176 Valid, 81 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:07:09,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2022-11-02 21:07:09,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 306. [2022-11-02 21:07:09,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.1213114754098361) internal successors, (342), 305 states have internal predecessors, (342), 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) [2022-11-02 21:07:09,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 342 transitions. [2022-11-02 21:07:09,143 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 342 transitions. Word has length 47 [2022-11-02 21:07:09,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:07:09,144 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 342 transitions. [2022-11-02 21:07:09,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.5) internal successors, (60), 8 states have internal predecessors, (60), 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) [2022-11-02 21:07:09,144 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 342 transitions. [2022-11-02 21:07:09,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 306 [2022-11-02 21:07:09,151 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:07:09,151 INFO L195 NwaCegarLoop]: trace histogram [96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-02 21:07:09,192 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 21:07:09,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:07:09,380 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:07:09,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:09,380 INFO L85 PathProgramCache]: Analyzing trace with hash -107592410, now seen corresponding path program 4 times [2022-11-02 21:07:09,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:09,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301008456] [2022-11-02 21:07:09,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:09,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:09,680 INFO L134 CoverageAnalysis]: Checked inductivity of 11350 backedges. 4301 proven. 1 refuted. 0 times theorem prover too weak. 7048 trivial. 0 not checked. [2022-11-02 21:07:09,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:09,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301008456] [2022-11-02 21:07:09,681 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301008456] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:07:09,681 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699752282] [2022-11-02 21:07:09,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:07:09,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:07:09,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:07:09,689 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:07:09,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 21:07:09,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:07:09,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:07:09,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 521 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:07:09,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:07:09,973 INFO L134 CoverageAnalysis]: Checked inductivity of 11350 backedges. 2500 proven. 89 refuted. 0 times theorem prover too weak. 8761 trivial. 0 not checked. [2022-11-02 21:07:09,973 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:07:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 11350 backedges. 2500 proven. 89 refuted. 0 times theorem prover too weak. 8761 trivial. 0 not checked. [2022-11-02 21:07:10,099 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699752282] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:07:10,099 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:07:10,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2022-11-02 21:07:10,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761049949] [2022-11-02 21:07:10,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:07:10,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:07:10,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:10,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:07:10,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:07:10,102 INFO L87 Difference]: Start difference. First operand 306 states and 342 transitions. Second operand has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 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) [2022-11-02 21:07:10,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:07:10,475 INFO L93 Difference]: Finished difference Result 2596 states and 2920 transitions. [2022-11-02 21:07:10,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:07:10,476 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 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 305 [2022-11-02 21:07:10,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:07:10,491 INFO L225 Difference]: With dead ends: 2596 [2022-11-02 21:07:10,492 INFO L226 Difference]: Without dead ends: 2294 [2022-11-02 21:07:10,497 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 624 GetRequests, 604 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2022-11-02 21:07:10,499 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 168 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:07:10,500 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 87 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:07:10,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2294 states. [2022-11-02 21:07:10,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2294 to 1542. [2022-11-02 21:07:10,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1542 states, 1541 states have (on average 1.0837118754055808) internal successors, (1670), 1541 states have internal predecessors, (1670), 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) [2022-11-02 21:07:10,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1542 states to 1542 states and 1670 transitions. [2022-11-02 21:07:10,716 INFO L78 Accepts]: Start accepts. Automaton has 1542 states and 1670 transitions. Word has length 305 [2022-11-02 21:07:10,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:07:10,720 INFO L495 AbstractCegarLoop]: Abstraction has 1542 states and 1670 transitions. [2022-11-02 21:07:10,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.2) internal successors, (62), 10 states have internal predecessors, (62), 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) [2022-11-02 21:07:10,720 INFO L276 IsEmpty]: Start isEmpty. Operand 1542 states and 1670 transitions. [2022-11-02 21:07:10,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1542 [2022-11-02 21:07:10,802 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:07:10,802 INFO L195 NwaCegarLoop]: trace histogram [576, 576, 96, 96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-02 21:07:10,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 21:07:11,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 21:07:11,012 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:07:11,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:11,013 INFO L85 PathProgramCache]: Analyzing trace with hash -1672164490, now seen corresponding path program 5 times [2022-11-02 21:07:11,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:11,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740799156] [2022-11-02 21:07:11,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:11,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:11,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:13,184 INFO L134 CoverageAnalysis]: Checked inductivity of 402372 backedges. 151174 proven. 1 refuted. 0 times theorem prover too weak. 251197 trivial. 0 not checked. [2022-11-02 21:07:13,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:13,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740799156] [2022-11-02 21:07:13,185 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740799156] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:07:13,185 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711606730] [2022-11-02 21:07:13,185 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:07:13,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:07:13,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:07:13,187 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:07:13,211 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 21:07:13,517 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 69 check-sat command(s) [2022-11-02 21:07:13,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:07:13,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:07:13,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:07:14,009 INFO L134 CoverageAnalysis]: Checked inductivity of 402372 backedges. 214152 proven. 3149 refuted. 0 times theorem prover too weak. 185071 trivial. 0 not checked. [2022-11-02 21:07:14,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:07:14,439 INFO L134 CoverageAnalysis]: Checked inductivity of 402372 backedges. 214152 proven. 3149 refuted. 0 times theorem prover too weak. 185071 trivial. 0 not checked. [2022-11-02 21:07:14,440 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711606730] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:07:14,440 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:07:14,441 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 10 [2022-11-02 21:07:14,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137515588] [2022-11-02 21:07:14,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:07:14,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:07:14,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:07:14,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:07:14,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:07:14,455 INFO L87 Difference]: Start difference. First operand 1542 states and 1670 transitions. Second operand has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 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) [2022-11-02 21:07:15,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:07:15,946 INFO L93 Difference]: Finished difference Result 15052 states and 16328 transitions. [2022-11-02 21:07:15,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-02 21:07:15,946 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 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 1541 [2022-11-02 21:07:15,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:07:15,993 INFO L225 Difference]: With dead ends: 15052 [2022-11-02 21:07:15,993 INFO L226 Difference]: Without dead ends: 13514 [2022-11-02 21:07:16,001 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3096 GetRequests, 3076 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2022-11-02 21:07:16,002 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 222 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:07:16,003 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [222 Valid, 104 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:07:16,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13514 states. [2022-11-02 21:07:16,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13514 to 9018. [2022-11-02 21:07:16,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9018 states, 9017 states have (on average 1.0777420428080293) internal successors, (9718), 9017 states have internal predecessors, (9718), 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) [2022-11-02 21:07:16,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9018 states to 9018 states and 9718 transitions. [2022-11-02 21:07:16,951 INFO L78 Accepts]: Start accepts. Automaton has 9018 states and 9718 transitions. Word has length 1541 [2022-11-02 21:07:16,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:07:16,952 INFO L495 AbstractCegarLoop]: Abstraction has 9018 states and 9718 transitions. [2022-11-02 21:07:16,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.1) internal successors, (91), 10 states have internal predecessors, (91), 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) [2022-11-02 21:07:16,953 INFO L276 IsEmpty]: Start isEmpty. Operand 9018 states and 9718 transitions. [2022-11-02 21:07:18,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9018 [2022-11-02 21:07:18,060 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:07:18,061 INFO L195 NwaCegarLoop]: trace histogram [3456, 3456, 576, 576, 576, 96, 96, 96, 16, 16, 16, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-02 21:07:18,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 21:07:18,262 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 21:07:18,263 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:07:18,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:07:18,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1229783514, now seen corresponding path program 6 times [2022-11-02 21:07:18,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:07:18,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722109004] [2022-11-02 21:07:18,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:07:18,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:07:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:07:47,820 INFO L134 CoverageAnalysis]: Checked inductivity of 14499074 backedges. 3172646 proven. 113309 refuted. 0 times theorem prover too weak. 11213119 trivial. 0 not checked. [2022-11-02 21:07:47,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:07:47,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722109004] [2022-11-02 21:07:47,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722109004] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:07:47,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526378828] [2022-11-02 21:07:47,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 21:07:47,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:07:47,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:07:47,823 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:07:47,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 21:07:55,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 755 check-sat command(s) [2022-11-02 21:07:55,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:07:55,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 5125 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-02 21:07:55,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:07:58,685 INFO L134 CoverageAnalysis]: Checked inductivity of 14499074 backedges. 3172656 proven. 113309 refuted. 0 times theorem prover too weak. 11213109 trivial. 0 not checked. [2022-11-02 21:07:58,685 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:08:01,796 INFO L134 CoverageAnalysis]: Checked inductivity of 14499074 backedges. 3172656 proven. 113309 refuted. 0 times theorem prover too weak. 11213109 trivial. 0 not checked. [2022-11-02 21:08:01,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526378828] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 21:08:01,796 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-02 21:08:01,798 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2022-11-02 21:08:01,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658421105] [2022-11-02 21:08:01,800 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-02 21:08:01,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:08:01,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:08:01,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:08:01,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:08:01,814 INFO L87 Difference]: Start difference. First operand 9018 states and 9718 transitions. Second operand has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 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) [2022-11-02 21:08:03,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:08:03,638 INFO L93 Difference]: Finished difference Result 34861 states and 37582 transitions. [2022-11-02 21:08:03,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:08:03,638 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 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 9017 [2022-11-02 21:08:03,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:08:03,719 INFO L225 Difference]: With dead ends: 34861 [2022-11-02 21:08:03,719 INFO L226 Difference]: Without dead ends: 26970 [2022-11-02 21:08:03,734 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 18037 GetRequests, 18030 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2022-11-02 21:08:03,735 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 60 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:08:03,735 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 88 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:08:03,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26970 states. [2022-11-02 21:08:05,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26970 to 26970. [2022-11-02 21:08:05,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26970 states, 26969 states have (on average 1.07701434980904) internal successors, (29046), 26969 states have internal predecessors, (29046), 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) [2022-11-02 21:08:05,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26970 states to 26970 states and 29046 transitions. [2022-11-02 21:08:05,852 INFO L78 Accepts]: Start accepts. Automaton has 26970 states and 29046 transitions. Word has length 9017 [2022-11-02 21:08:05,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:08:05,855 INFO L495 AbstractCegarLoop]: Abstraction has 26970 states and 29046 transitions. [2022-11-02 21:08:05,855 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.0) internal successors, (99), 9 states have internal predecessors, (99), 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) [2022-11-02 21:08:05,855 INFO L276 IsEmpty]: Start isEmpty. Operand 26970 states and 29046 transitions. [2022-11-02 21:08:11,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26970 [2022-11-02 21:08:11,027 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:08:11,031 INFO L195 NwaCegarLoop]: trace histogram [10368, 10368, 1728, 1728, 1728, 288, 288, 288, 48, 48, 48, 8, 8, 8, 4, 4, 4, 1, 1, 1, 1, 1] [2022-11-02 21:08:11,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 21:08:11,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5a1a4fa0-6031-4fd2-a5b7-964bba33c0f1/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:08:11,231 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:08:11,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:08:11,236 INFO L85 PathProgramCache]: Analyzing trace with hash 2046182950, now seen corresponding path program 7 times [2022-11-02 21:08:11,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:08:11,236 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150135706] [2022-11-02 21:08:11,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:08:11,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms