./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound50.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_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/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_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/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_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/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 dcebefc76bde79b9a5fa67feebc75881761b0a4209b78516b385f787f62f9340 --- 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 21:02:27,775 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 21:02:27,778 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 21:02:27,830 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 21:02:27,832 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 21:02:27,837 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 21:02:27,840 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 21:02:27,844 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 21:02:27,846 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 21:02:27,847 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 21:02:27,848 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 21:02:27,850 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 21:02:27,851 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 21:02:27,852 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 21:02:27,853 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 21:02:27,854 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 21:02:27,855 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 21:02:27,856 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 21:02:27,858 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 21:02:27,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 21:02:27,865 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 21:02:27,872 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 21:02:27,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 21:02:27,879 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 21:02:27,888 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 21:02:27,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 21:02:27,893 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 21:02:27,894 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 21:02:27,896 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 21:02:27,897 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 21:02:27,897 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 21:02:27,898 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 21:02:27,900 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 21:02:27,902 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 21:02:27,903 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 21:02:27,903 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 21:02:27,904 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 21:02:27,904 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 21:02:27,904 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 21:02:27,905 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 21:02:27,906 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 21:02:27,907 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 21:02:27,948 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 21:02:27,948 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 21:02:27,948 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 21:02:27,948 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 21:02:27,949 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 21:02:27,949 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 21:02:27,950 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 21:02:27,950 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 21:02:27,951 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 21:02:27,951 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 21:02:27,951 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 21:02:27,951 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 21:02:27,952 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 21:02:27,952 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 21:02:27,952 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 21:02:27,952 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 21:02:27,952 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 21:02:27,953 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 21:02:27,953 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 21:02:27,953 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 21:02:27,953 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 21:02:27,954 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 21:02:27,954 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 21:02:27,954 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 21:02:27,954 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:02:27,954 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 21:02:27,955 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 21:02:27,955 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 21:02:27,955 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 21:02:27,955 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 21:02:27,955 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 21:02:27,956 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 21:02:27,956 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 21:02:27,956 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_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dcebefc76bde79b9a5fa67feebc75881761b0a4209b78516b385f787f62f9340 [2022-11-02 21:02:28,259 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 21:02:28,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 21:02:28,290 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 21:02:28,292 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 21:02:28,293 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 21:02:28,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound50.c [2022-11-02 21:02:28,385 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/data/e1350b098/4d1b7a850d894c05abce858750dfc8d8/FLAG1f764aee2 [2022-11-02 21:02:28,968 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 21:02:28,969 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound50.c [2022-11-02 21:02:28,977 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/data/e1350b098/4d1b7a850d894c05abce858750dfc8d8/FLAG1f764aee2 [2022-11-02 21:02:29,318 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/data/e1350b098/4d1b7a850d894c05abce858750dfc8d8 [2022-11-02 21:02:29,328 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 21:02:29,332 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 21:02:29,333 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 21:02:29,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 21:02:29,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 21:02:29,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:02:29" (1/1) ... [2022-11-02 21:02:29,341 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@14814890 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:29, skipping insertion in model container [2022-11-02 21:02:29,341 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 09:02:29" (1/1) ... [2022-11-02 21:02:29,349 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 21:02:29,366 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 21:02:29,626 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_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound50.c[458,471] [2022-11-02 21:02:29,654 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:02:29,665 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 21:02:29,684 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_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/sv-benchmarks/c/nla-digbench-scaling/ps4-ll_valuebound50.c[458,471] [2022-11-02 21:02:29,709 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 21:02:29,725 INFO L208 MainTranslator]: Completed translation [2022-11-02 21:02:29,726 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:29 WrapperNode [2022-11-02 21:02:29,726 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 21:02:29,727 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 21:02:29,728 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 21:02:29,728 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 21:02:29,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:29" (1/1) ... [2022-11-02 21:02:29,745 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:29" (1/1) ... [2022-11-02 21:02:29,771 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2022-11-02 21:02:29,771 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 21:02:29,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 21:02:29,773 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 21:02:29,773 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 21:02:29,784 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:29" (1/1) ... [2022-11-02 21:02:29,784 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:29" (1/1) ... [2022-11-02 21:02:29,797 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:29" (1/1) ... [2022-11-02 21:02:29,797 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:29" (1/1) ... [2022-11-02 21:02:29,800 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:29" (1/1) ... [2022-11-02 21:02:29,804 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:29" (1/1) ... [2022-11-02 21:02:29,811 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:29" (1/1) ... [2022-11-02 21:02:29,812 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:29" (1/1) ... [2022-11-02 21:02:29,814 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 21:02:29,815 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 21:02:29,815 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 21:02:29,815 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 21:02:29,818 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:29" (1/1) ... [2022-11-02 21:02:29,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 21:02:29,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:29,856 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 21:02:29,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 21:02:29,912 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 21:02:29,912 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 21:02:29,912 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 21:02:29,913 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 21:02:29,913 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-02 21:02:29,913 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-02 21:02:29,996 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 21:02:30,000 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 21:02:30,227 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 21:02:30,237 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 21:02:30,238 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-02 21:02:30,241 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:02:30 BoogieIcfgContainer [2022-11-02 21:02:30,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 21:02:30,244 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 21:02:30,244 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 21:02:30,252 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 21:02:30,253 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 09:02:29" (1/3) ... [2022-11-02 21:02:30,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc86886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:02:30, skipping insertion in model container [2022-11-02 21:02:30,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 09:02:29" (2/3) ... [2022-11-02 21:02:30,256 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6fc86886 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 09:02:30, skipping insertion in model container [2022-11-02 21:02:30,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 09:02:30" (3/3) ... [2022-11-02 21:02:30,257 INFO L112 eAbstractionObserver]: Analyzing ICFG ps4-ll_valuebound50.c [2022-11-02 21:02:30,283 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 21:02:30,284 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 21:02:30,374 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 21:02:30,395 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;@7d80589e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 21:02:30,396 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 21:02:30,401 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:02:30,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-02 21:02:30,409 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:30,410 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:30,411 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:30,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:30,422 INFO L85 PathProgramCache]: Analyzing trace with hash -589436290, now seen corresponding path program 1 times [2022-11-02 21:02:30,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:30,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620149458] [2022-11-02 21:02:30,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:30,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:30,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:30,608 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620149458] [2022-11-02 21:02:30,609 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 21:02:30,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901227578] [2022-11-02 21:02:30,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:30,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:30,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:30,617 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:02:30,636 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 21:02:30,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:30,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-02 21:02:30,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:30,784 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 21:02:30,785 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:30,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901227578] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:30,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:30,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 21:02:30,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746259802] [2022-11-02 21:02:30,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:30,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 21:02:30,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:02:30,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 21:02:30,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 21:02:30,856 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:30,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:30,884 INFO L93 Difference]: Finished difference Result 35 states and 49 transitions. [2022-11-02 21:02:30,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 21:02:30,887 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-02 21:02:30,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:30,898 INFO L225 Difference]: With dead ends: 35 [2022-11-02 21:02:30,899 INFO L226 Difference]: Without dead ends: 15 [2022-11-02 21:02:30,910 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 21:02:30,916 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:30,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 21:02:30,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-11-02 21:02:30,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-11-02 21:02:30,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 21:02:30,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2022-11-02 21:02:30,967 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 9 [2022-11-02 21:02:30,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:30,968 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2022-11-02 21:02:30,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:30,969 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2022-11-02 21:02:30,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-02 21:02:30,971 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:30,971 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:31,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-02 21:02:31,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-02 21:02:31,185 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:31,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:31,186 INFO L85 PathProgramCache]: Analyzing trace with hash 1187358532, now seen corresponding path program 1 times [2022-11-02 21:02:31,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:31,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194694408] [2022-11-02 21:02:31,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:31,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:31,201 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:02:31,201 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [649921417] [2022-11-02 21:02:31,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:31,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:31,202 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:31,203 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:02:31,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 21:02:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:31,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 21:02:31,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:31,381 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 21:02:31,382 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 21:02:31,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:31,382 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194694408] [2022-11-02 21:02:31,383 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:02:31,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649921417] [2022-11-02 21:02:31,383 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649921417] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 21:02:31,384 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 21:02:31,384 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 21:02:31,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917843316] [2022-11-02 21:02:31,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:31,386 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:02:31,386 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:02:31,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:02:31,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 21:02:31,388 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:31,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:31,487 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2022-11-02 21:02:31,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:02:31,488 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-02 21:02:31,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:31,489 INFO L225 Difference]: With dead ends: 26 [2022-11-02 21:02:31,490 INFO L226 Difference]: Without dead ends: 22 [2022-11-02 21:02:31,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-02 21:02:31,492 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 6 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:31,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 45 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:02:31,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-02 21:02:31,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-02 21:02:31,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 16 states have internal predecessors, (17), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:02:31,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-11-02 21:02:31,508 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 9 [2022-11-02 21:02:31,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:31,509 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-11-02 21:02:31,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.6) internal successors, (8), 4 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-02 21:02:31,510 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-11-02 21:02:31,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-02 21:02:31,512 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:31,512 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:31,547 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:31,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:31,718 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:31,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:31,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1781398469, now seen corresponding path program 1 times [2022-11-02 21:02:31,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:31,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402926836] [2022-11-02 21:02:31,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:31,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:31,738 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:02:31,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2070583788] [2022-11-02 21:02:31,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:31,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:31,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:31,746 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:02:31,749 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 21:02:31,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:31,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-02 21:02:31,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:32,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 21:02:32,016 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:32,689 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-11-02 21:02:32,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:32,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402926836] [2022-11-02 21:02:32,690 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:02:32,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070583788] [2022-11-02 21:02:32,691 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070583788] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:32,691 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:02:32,691 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2022-11-02 21:02:32,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844257738] [2022-11-02 21:02:32,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 21:02:32,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 21:02:32,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:02:32,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 21:02:32,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-11-02 21:02:32,694 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 21:02:32,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:32,799 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2022-11-02 21:02:32,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 21:02:32,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-11-02 21:02:32,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:32,806 INFO L225 Difference]: With dead ends: 28 [2022-11-02 21:02:32,806 INFO L226 Difference]: Without dead ends: 23 [2022-11-02 21:02:32,807 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-02 21:02:32,809 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 6 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:32,812 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 38 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:02:32,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-11-02 21:02:32,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-11-02 21:02:32,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 21:02:32,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-11-02 21:02:32,833 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 16 [2022-11-02 21:02:32,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:32,835 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-11-02 21:02:32,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-02 21:02:32,835 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-11-02 21:02:32,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-02 21:02:32,838 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:32,838 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:32,867 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-02 21:02:33,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:33,045 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:33,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:33,046 INFO L85 PathProgramCache]: Analyzing trace with hash -1711372296, now seen corresponding path program 1 times [2022-11-02 21:02:33,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:33,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775124393] [2022-11-02 21:02:33,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:33,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:33,060 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:02:33,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [201884762] [2022-11-02 21:02:33,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:33,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:33,062 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:33,063 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:02:33,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 21:02:33,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:33,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 12 conjunts are in the unsatisfiable core [2022-11-02 21:02:33,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:33,423 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 21:02:33,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:33,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:33,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775124393] [2022-11-02 21:02:33,687 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:02:33,688 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201884762] [2022-11-02 21:02:33,689 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [201884762] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:33,689 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:02:33,690 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-11-02 21:02:33,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413938280] [2022-11-02 21:02:33,690 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:33,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-02 21:02:33,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:02:33,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-02 21:02:33,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-11-02 21:02:33,696 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 21:02:33,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:33,840 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2022-11-02 21:02:33,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 21:02:33,841 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 22 [2022-11-02 21:02:33,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:33,844 INFO L225 Difference]: With dead ends: 31 [2022-11-02 21:02:33,844 INFO L226 Difference]: Without dead ends: 26 [2022-11-02 21:02:33,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-11-02 21:02:33,849 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 2 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:33,849 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 69 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:02:33,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-11-02 21:02:33,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-11-02 21:02:33,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:02:33,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-11-02 21:02:33,862 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 22 [2022-11-02 21:02:33,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:33,862 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-11-02 21:02:33,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-02 21:02:33,863 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-11-02 21:02:33,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-02 21:02:33,864 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:33,864 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:33,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:34,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:34,079 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:34,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:34,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1075497887, now seen corresponding path program 2 times [2022-11-02 21:02:34,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:34,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875631417] [2022-11-02 21:02:34,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:34,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:34,096 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:02:34,096 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [433682172] [2022-11-02 21:02:34,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:02:34,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:34,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:34,104 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:02:34,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 21:02:34,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:02:34,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:02:34,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 16 conjunts are in the unsatisfiable core [2022-11-02 21:02:34,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:34,388 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 21:02:34,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:34,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:34,623 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875631417] [2022-11-02 21:02:34,623 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:02:34,624 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433682172] [2022-11-02 21:02:34,625 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [433682172] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:34,625 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:02:34,625 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2022-11-02 21:02:34,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557604026] [2022-11-02 21:02:34,626 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:34,626 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-02 21:02:34,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:02:34,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-02 21:02:34,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-02 21:02:34,628 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:02:34,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:34,766 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2022-11-02 21:02:34,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-02 21:02:34,767 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 29 [2022-11-02 21:02:34,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:34,771 INFO L225 Difference]: With dead ends: 34 [2022-11-02 21:02:34,772 INFO L226 Difference]: Without dead ends: 29 [2022-11-02 21:02:34,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2022-11-02 21:02:34,774 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 2 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:34,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 89 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:02:34,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-11-02 21:02:34,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-11-02 21:02:34,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 5 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 21:02:34,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-11-02 21:02:34,803 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 29 [2022-11-02 21:02:34,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:34,803 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-11-02 21:02:34,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 4 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-02 21:02:34,804 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-11-02 21:02:34,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-11-02 21:02:34,807 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:34,808 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:34,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-02 21:02:35,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:35,033 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:35,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:35,034 INFO L85 PathProgramCache]: Analyzing trace with hash 817917912, now seen corresponding path program 3 times [2022-11-02 21:02:35,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:35,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482600788] [2022-11-02 21:02:35,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:35,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:35,049 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:02:35,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [583009914] [2022-11-02 21:02:35,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:02:35,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:35,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:35,059 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:02:35,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 21:02:35,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-02 21:02:35,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:02:35,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-02 21:02:35,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 8 proven. 18 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-02 21:02:35,385 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:35,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:35,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482600788] [2022-11-02 21:02:35,582 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:02:35,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583009914] [2022-11-02 21:02:35,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [583009914] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:35,583 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:02:35,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-11-02 21:02:35,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2475165] [2022-11-02 21:02:35,584 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:35,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-02 21:02:35,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:02:35,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-02 21:02:35,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2022-11-02 21:02:35,587 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 21:02:35,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:35,766 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2022-11-02 21:02:35,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-02 21:02:35,766 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 36 [2022-11-02 21:02:35,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:35,767 INFO L225 Difference]: With dead ends: 37 [2022-11-02 21:02:35,767 INFO L226 Difference]: Without dead ends: 32 [2022-11-02 21:02:35,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-11-02 21:02:35,768 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 2 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:35,769 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 111 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 21:02:35,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-02 21:02:35,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-11-02 21:02:35,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 6 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 21:02:35,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2022-11-02 21:02:35,784 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 36 [2022-11-02 21:02:35,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:35,784 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2022-11-02 21:02:35,785 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 5 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-02 21:02:35,785 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2022-11-02 21:02:35,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-02 21:02:35,788 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:35,791 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:35,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:36,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:36,017 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:36,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:36,018 INFO L85 PathProgramCache]: Analyzing trace with hash 1384689793, now seen corresponding path program 4 times [2022-11-02 21:02:36,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:36,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610236394] [2022-11-02 21:02:36,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:36,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:36,033 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:02:36,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516594675] [2022-11-02 21:02:36,039 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:02:36,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:36,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:36,041 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:02:36,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 21:02:36,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:02:36,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:02:36,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-02 21:02:36,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:36,370 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 10 proven. 30 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2022-11-02 21:02:36,371 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:36,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:36,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610236394] [2022-11-02 21:02:36,895 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:02:36,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516594675] [2022-11-02 21:02:36,896 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516594675] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:36,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:02:36,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2022-11-02 21:02:36,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863028273] [2022-11-02 21:02:36,897 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:36,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-02 21:02:36,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:02:36,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-02 21:02:36,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2022-11-02 21:02:36,898 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 21:02:37,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:37,147 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-11-02 21:02:37,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-02 21:02:37,150 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 43 [2022-11-02 21:02:37,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:37,151 INFO L225 Difference]: With dead ends: 40 [2022-11-02 21:02:37,151 INFO L226 Difference]: Without dead ends: 35 [2022-11-02 21:02:37,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-11-02 21:02:37,153 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 2 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:37,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 135 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:02:37,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-11-02 21:02:37,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-11-02 21:02:37,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 7 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 21:02:37,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2022-11-02 21:02:37,166 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 43 [2022-11-02 21:02:37,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:37,166 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2022-11-02 21:02:37,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 6 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-11-02 21:02:37,167 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2022-11-02 21:02:37,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-11-02 21:02:37,168 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:37,168 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:37,207 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:37,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:37,387 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:37,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:37,387 INFO L85 PathProgramCache]: Analyzing trace with hash -23130184, now seen corresponding path program 5 times [2022-11-02 21:02:37,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:37,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795346969] [2022-11-02 21:02:37,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:37,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:37,398 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:02:37,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [197081801] [2022-11-02 21:02:37,399 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:02:37,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:37,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:37,401 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:02:37,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-02 21:02:37,543 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2022-11-02 21:02:37,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:02:37,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-02 21:02:37,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:37,778 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 12 proven. 45 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-02 21:02:37,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:37,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:37,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795346969] [2022-11-02 21:02:37,984 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:02:37,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197081801] [2022-11-02 21:02:37,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197081801] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:37,985 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:02:37,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2022-11-02 21:02:37,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101783410] [2022-11-02 21:02:37,985 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:37,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-02 21:02:37,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:02:37,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-02 21:02:37,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-02 21:02:37,987 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 21:02:38,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:38,273 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2022-11-02 21:02:38,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-02 21:02:38,273 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 50 [2022-11-02 21:02:38,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:38,274 INFO L225 Difference]: With dead ends: 43 [2022-11-02 21:02:38,275 INFO L226 Difference]: Without dead ends: 38 [2022-11-02 21:02:38,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-11-02 21:02:38,276 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:38,276 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 161 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 21:02:38,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-11-02 21:02:38,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2022-11-02 21:02:38,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 8 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-02 21:02:38,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2022-11-02 21:02:38,290 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 50 [2022-11-02 21:02:38,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:38,291 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2022-11-02 21:02:38,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.2) internal successors, (22), 10 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 21:02:38,292 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2022-11-02 21:02:38,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-11-02 21:02:38,293 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:38,293 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:38,337 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:38,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:38,517 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:38,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:38,518 INFO L85 PathProgramCache]: Analyzing trace with hash -1898941279, now seen corresponding path program 6 times [2022-11-02 21:02:38,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:38,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042344469] [2022-11-02 21:02:38,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:38,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:38,531 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:02:38,531 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1007940858] [2022-11-02 21:02:38,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-02 21:02:38,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:38,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:38,533 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:02:38,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-02 21:02:38,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2022-11-02 21:02:38,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:02:38,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-02 21:02:38,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:39,076 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 14 proven. 63 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-02 21:02:39,076 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:39,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:39,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042344469] [2022-11-02 21:02:39,502 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:02:39,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007940858] [2022-11-02 21:02:39,503 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007940858] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:39,503 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:02:39,503 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2022-11-02 21:02:39,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948478605] [2022-11-02 21:02:39,506 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:39,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-02 21:02:39,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:02:39,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-02 21:02:39,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-11-02 21:02:39,509 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-02 21:02:39,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:39,834 INFO L93 Difference]: Finished difference Result 46 states and 52 transitions. [2022-11-02 21:02:39,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 21:02:39,835 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 57 [2022-11-02 21:02:39,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:39,836 INFO L225 Difference]: With dead ends: 46 [2022-11-02 21:02:39,836 INFO L226 Difference]: Without dead ends: 41 [2022-11-02 21:02:39,837 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2022-11-02 21:02:39,837 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:39,838 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 189 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:02:39,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-11-02 21:02:39,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-11-02 21:02:39,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 9 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:02:39,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2022-11-02 21:02:39,863 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 57 [2022-11-02 21:02:39,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:39,866 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2022-11-02 21:02:39,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 8 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-02 21:02:39,867 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2022-11-02 21:02:39,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-11-02 21:02:39,869 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:39,870 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:39,877 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-02 21:02:40,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:40,076 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:40,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:40,077 INFO L85 PathProgramCache]: Analyzing trace with hash 385378200, now seen corresponding path program 7 times [2022-11-02 21:02:40,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:40,077 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7584010] [2022-11-02 21:02:40,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:40,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:40,098 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:02:40,098 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1931730651] [2022-11-02 21:02:40,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-02 21:02:40,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:40,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:40,100 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:02:40,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-02 21:02:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 21:02:40,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 36 conjunts are in the unsatisfiable core [2022-11-02 21:02:40,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:41,094 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 16 proven. 84 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2022-11-02 21:02:41,095 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:41,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:41,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7584010] [2022-11-02 21:02:41,299 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:02:41,300 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931730651] [2022-11-02 21:02:41,300 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931730651] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:41,300 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:02:41,300 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2022-11-02 21:02:41,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088111500] [2022-11-02 21:02:41,302 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:41,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-02 21:02:41,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:02:41,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-02 21:02:41,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2022-11-02 21:02:41,304 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:02:41,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:41,662 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2022-11-02 21:02:41,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-02 21:02:41,662 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 64 [2022-11-02 21:02:41,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:41,664 INFO L225 Difference]: With dead ends: 49 [2022-11-02 21:02:41,664 INFO L226 Difference]: Without dead ends: 44 [2022-11-02 21:02:41,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-11-02 21:02:41,665 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 2 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:41,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 219 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:02:41,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-11-02 21:02:41,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2022-11-02 21:02:41,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 10 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-02 21:02:41,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-11-02 21:02:41,679 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 64 [2022-11-02 21:02:41,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:41,679 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-11-02 21:02:41,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 12 states have internal predecessors, (26), 9 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-02 21:02:41,680 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-11-02 21:02:41,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-11-02 21:02:41,681 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:41,681 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:41,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:41,889 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-02 21:02:41,889 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:41,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:41,889 INFO L85 PathProgramCache]: Analyzing trace with hash 2073985217, now seen corresponding path program 8 times [2022-11-02 21:02:41,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:41,890 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784577593] [2022-11-02 21:02:41,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:41,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:41,912 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:02:41,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1310521260] [2022-11-02 21:02:41,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-02 21:02:41,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:41,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:41,916 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:02:41,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-02 21:02:42,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-02 21:02:42,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:02:42,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 40 conjunts are in the unsatisfiable core [2022-11-02 21:02:42,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:42,632 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 18 proven. 108 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-02 21:02:42,632 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:42,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:42,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784577593] [2022-11-02 21:02:42,854 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:02:42,854 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310521260] [2022-11-02 21:02:42,854 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310521260] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:42,854 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:02:42,854 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2022-11-02 21:02:42,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719414872] [2022-11-02 21:02:42,854 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:42,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-02 21:02:42,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:02:42,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-02 21:02:42,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2022-11-02 21:02:42,857 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-02 21:02:43,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:43,238 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2022-11-02 21:02:43,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-02 21:02:43,239 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 71 [2022-11-02 21:02:43,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:43,240 INFO L225 Difference]: With dead ends: 52 [2022-11-02 21:02:43,240 INFO L226 Difference]: Without dead ends: 47 [2022-11-02 21:02:43,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2022-11-02 21:02:43,241 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 2 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:43,241 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 251 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-02 21:02:43,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-02 21:02:43,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-11-02 21:02:43,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 11 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-02 21:02:43,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2022-11-02 21:02:43,256 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 71 [2022-11-02 21:02:43,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:43,256 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2022-11-02 21:02:43,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 10 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-02 21:02:43,257 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2022-11-02 21:02:43,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-11-02 21:02:43,258 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:43,258 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:43,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:43,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-02 21:02:43,465 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:43,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:43,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1353348984, now seen corresponding path program 9 times [2022-11-02 21:02:43,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:43,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164847930] [2022-11-02 21:02:43,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:43,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:43,473 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:02:43,474 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [981985982] [2022-11-02 21:02:43,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-02 21:02:43,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:43,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:43,475 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:02:43,482 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-02 21:02:44,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2022-11-02 21:02:44,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:02:44,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 45 conjunts are in the unsatisfiable core [2022-11-02 21:02:44,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 20 proven. 135 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2022-11-02 21:02:44,492 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:45,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:45,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164847930] [2022-11-02 21:02:45,464 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:02:45,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981985982] [2022-11-02 21:02:45,464 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981985982] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:45,464 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:02:45,465 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2022-11-02 21:02:45,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102625239] [2022-11-02 21:02:45,465 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:45,466 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 21:02:45,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:02:45,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 21:02:45,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=513, Unknown=0, NotChecked=0, Total=650 [2022-11-02 21:02:45,468 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-02 21:02:45,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:45,985 INFO L93 Difference]: Finished difference Result 55 states and 64 transitions. [2022-11-02 21:02:45,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-02 21:02:45,985 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 78 [2022-11-02 21:02:45,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:45,986 INFO L225 Difference]: With dead ends: 55 [2022-11-02 21:02:45,986 INFO L226 Difference]: Without dead ends: 50 [2022-11-02 21:02:45,987 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 120 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=147, Invalid=609, Unknown=0, NotChecked=0, Total=756 [2022-11-02 21:02:45,987 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 2 mSDsluCounter, 244 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:45,988 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 285 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-02 21:02:45,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-11-02 21:02:46,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-11-02 21:02:46,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 12 states have call successors, (12), 3 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-02 21:02:46,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 59 transitions. [2022-11-02 21:02:46,005 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 59 transitions. Word has length 78 [2022-11-02 21:02:46,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:46,006 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 59 transitions. [2022-11-02 21:02:46,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 states have internal predecessors, (30), 11 states have call successors, (11), 2 states have call predecessors, (11), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-02 21:02:46,006 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 59 transitions. [2022-11-02 21:02:46,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-11-02 21:02:46,011 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:46,012 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:46,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:46,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:46,218 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:46,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:46,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1817498849, now seen corresponding path program 10 times [2022-11-02 21:02:46,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:46,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824821415] [2022-11-02 21:02:46,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:46,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:46,232 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:02:46,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1753142347] [2022-11-02 21:02:46,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-02 21:02:46,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:46,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:46,237 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:02:46,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-02 21:02:46,673 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-02 21:02:46,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-02 21:02:46,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-02 21:02:46,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 21:02:47,010 INFO L134 CoverageAnalysis]: Checked inductivity of 407 backedges. 22 proven. 165 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2022-11-02 21:02:47,010 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 21:02:47,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 21:02:47,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824821415] [2022-11-02 21:02:47,223 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 21:02:47,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753142347] [2022-11-02 21:02:47,223 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753142347] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-02 21:02:47,223 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-02 21:02:47,224 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-11-02 21:02:47,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515711514] [2022-11-02 21:02:47,224 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-02 21:02:47,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-02 21:02:47,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 21:02:47,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-02 21:02:47,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-11-02 21:02:47,226 INFO L87 Difference]: Start difference. First operand 50 states and 59 transitions. Second operand has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-02 21:02:47,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 21:02:47,735 INFO L93 Difference]: Finished difference Result 58 states and 68 transitions. [2022-11-02 21:02:47,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-02 21:02:47,736 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 85 [2022-11-02 21:02:47,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 21:02:47,737 INFO L225 Difference]: With dead ends: 58 [2022-11-02 21:02:47,737 INFO L226 Difference]: Without dead ends: 53 [2022-11-02 21:02:47,738 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-11-02 21:02:47,739 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 2 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 499 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-11-02 21:02:47,739 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 321 Invalid, 499 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-11-02 21:02:47,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-11-02 21:02:47,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-11-02 21:02:47,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 13 states have call successors, (13), 3 states have call predecessors, (13), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-02 21:02:47,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2022-11-02 21:02:47,752 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 85 [2022-11-02 21:02:47,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 21:02:47,752 INFO L495 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2022-11-02 21:02:47,752 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 15 states have internal predecessors, (32), 12 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-02 21:02:47,753 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2022-11-02 21:02:47,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-11-02 21:02:47,754 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 21:02:47,754 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 21:02:47,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-02 21:02:47,961 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:47,961 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 21:02:47,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 21:02:47,961 INFO L85 PathProgramCache]: Analyzing trace with hash 638795608, now seen corresponding path program 11 times [2022-11-02 21:02:47,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 21:02:47,962 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517040799] [2022-11-02 21:02:47,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 21:02:47,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 21:02:47,979 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 21:02:47,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2050313709] [2022-11-02 21:02:47,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-02 21:02:47,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 21:02:47,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 21:02:47,984 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 21:02:48,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_db935dd8-3e6f-4f9f-a9b4-bb9a674beaab/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process