./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.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_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/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_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/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_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/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 603eeec29f0f7a499f451ec7fa1906f0a8c90a729e0fc96740e12a91ea711946 --- 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 20:44:49,204 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-02 20:44:49,210 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-02 20:44:49,240 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-02 20:44:49,240 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-02 20:44:49,242 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-02 20:44:49,243 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-02 20:44:49,245 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-02 20:44:49,246 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-02 20:44:49,247 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-02 20:44:49,248 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-02 20:44:49,249 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-02 20:44:49,250 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-02 20:44:49,251 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-02 20:44:49,252 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-02 20:44:49,253 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-02 20:44:49,254 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-02 20:44:49,255 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-02 20:44:49,257 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-02 20:44:49,258 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-02 20:44:49,260 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-02 20:44:49,261 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-02 20:44:49,262 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-02 20:44:49,263 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-02 20:44:49,267 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-02 20:44:49,268 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-02 20:44:49,268 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-02 20:44:49,269 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-02 20:44:49,270 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-02 20:44:49,271 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-02 20:44:49,271 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-02 20:44:49,272 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-02 20:44:49,273 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-02 20:44:49,273 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-02 20:44:49,274 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-02 20:44:49,275 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-02 20:44:49,276 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-02 20:44:49,276 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-02 20:44:49,276 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-02 20:44:49,277 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-02 20:44:49,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-02 20:44:49,279 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-02 20:44:49,303 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-02 20:44:49,303 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-02 20:44:49,303 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-02 20:44:49,304 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-02 20:44:49,304 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-02 20:44:49,305 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-02 20:44:49,305 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-02 20:44:49,305 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-02 20:44:49,306 INFO L138 SettingsManager]: * Use SBE=true [2022-11-02 20:44:49,306 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-02 20:44:49,306 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-02 20:44:49,306 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-02 20:44:49,307 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-02 20:44:49,307 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-02 20:44:49,307 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-02 20:44:49,307 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-02 20:44:49,307 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-02 20:44:49,308 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-02 20:44:49,308 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-02 20:44:49,308 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-02 20:44:49,308 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-02 20:44:49,308 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-02 20:44:49,309 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-02 20:44:49,309 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-02 20:44:49,309 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:44:49,310 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-02 20:44:49,310 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-02 20:44:49,310 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-02 20:44:49,310 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-02 20:44:49,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-02 20:44:49,311 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-02 20:44:49,311 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-02 20:44:49,311 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-02 20:44:49,311 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_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 603eeec29f0f7a499f451ec7fa1906f0a8c90a729e0fc96740e12a91ea711946 [2022-11-02 20:44:49,581 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-02 20:44:49,603 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-02 20:44:49,605 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-02 20:44:49,606 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-02 20:44:49,607 INFO L275 PluginConnector]: CDTParser initialized [2022-11-02 20:44:49,609 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/../../sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c [2022-11-02 20:44:49,698 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/data/11ccc115f/dc0d4b508aed457a83e3438d4ca4d19d/FLAGd2b8017e3 [2022-11-02 20:44:50,236 INFO L306 CDTParser]: Found 1 translation units. [2022-11-02 20:44:50,238 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c [2022-11-02 20:44:50,247 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/data/11ccc115f/dc0d4b508aed457a83e3438d4ca4d19d/FLAGd2b8017e3 [2022-11-02 20:44:50,587 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/data/11ccc115f/dc0d4b508aed457a83e3438d4ca4d19d [2022-11-02 20:44:50,590 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-02 20:44:50,591 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-02 20:44:50,594 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-02 20:44:50,594 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-02 20:44:50,598 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-02 20:44:50,599 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:44:50" (1/1) ... [2022-11-02 20:44:50,600 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7112686f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:50, skipping insertion in model container [2022-11-02 20:44:50,600 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 08:44:50" (1/1) ... [2022-11-02 20:44:50,607 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-02 20:44:50,621 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-02 20:44:50,815 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_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c[537,550] [2022-11-02 20:44:50,830 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:44:50,839 INFO L203 MainTranslator]: Completed pre-run [2022-11-02 20:44:50,851 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_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/sv-benchmarks/c/nla-digbench-scaling/hard-u_unwindbound2.c[537,550] [2022-11-02 20:44:50,859 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-02 20:44:50,878 INFO L208 MainTranslator]: Completed translation [2022-11-02 20:44:50,879 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:50 WrapperNode [2022-11-02 20:44:50,879 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-02 20:44:50,880 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-02 20:44:50,880 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-02 20:44:50,880 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-02 20:44:50,887 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:50" (1/1) ... [2022-11-02 20:44:50,894 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:50" (1/1) ... [2022-11-02 20:44:50,912 INFO L138 Inliner]: procedures = 14, calls = 15, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 65 [2022-11-02 20:44:50,913 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-02 20:44:50,913 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-02 20:44:50,914 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-02 20:44:50,914 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-02 20:44:50,923 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:50" (1/1) ... [2022-11-02 20:44:50,925 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:50" (1/1) ... [2022-11-02 20:44:50,926 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:50" (1/1) ... [2022-11-02 20:44:50,928 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:50" (1/1) ... [2022-11-02 20:44:50,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:50" (1/1) ... [2022-11-02 20:44:50,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:50" (1/1) ... [2022-11-02 20:44:50,947 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:50" (1/1) ... [2022-11-02 20:44:50,950 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:50" (1/1) ... [2022-11-02 20:44:50,952 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-02 20:44:50,958 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-02 20:44:50,959 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-02 20:44:50,959 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-02 20:44:50,960 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:50" (1/1) ... [2022-11-02 20:44:50,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-02 20:44:50,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:50,999 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-02 20:44:51,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-02 20:44:51,042 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-02 20:44:51,042 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-02 20:44:51,042 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-02 20:44:51,043 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-02 20:44:51,043 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-02 20:44:51,043 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-02 20:44:51,114 INFO L235 CfgBuilder]: Building ICFG [2022-11-02 20:44:51,116 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-02 20:44:51,265 INFO L276 CfgBuilder]: Performing block encoding [2022-11-02 20:44:51,272 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-02 20:44:51,272 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-02 20:44:51,274 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:44:51 BoogieIcfgContainer [2022-11-02 20:44:51,274 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-02 20:44:51,276 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-02 20:44:51,277 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-02 20:44:51,280 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-02 20:44:51,281 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 08:44:50" (1/3) ... [2022-11-02 20:44:51,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@743b29bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:44:51, skipping insertion in model container [2022-11-02 20:44:51,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 08:44:50" (2/3) ... [2022-11-02 20:44:51,282 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@743b29bb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 08:44:51, skipping insertion in model container [2022-11-02 20:44:51,282 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 08:44:51" (3/3) ... [2022-11-02 20:44:51,284 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-u_unwindbound2.c [2022-11-02 20:44:51,303 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-02 20:44:51,303 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-02 20:44:51,354 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-02 20:44:51,361 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;@37b34d66, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-02 20:44:51,361 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-02 20:44:51,365 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-02 20:44:51,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-02 20:44:51,373 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:51,374 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:51,374 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:44:51,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:51,380 INFO L85 PathProgramCache]: Analyzing trace with hash -712527539, now seen corresponding path program 1 times [2022-11-02 20:44:51,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:51,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176750683] [2022-11-02 20:44:51,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:51,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:51,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:51,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:51,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176750683] [2022-11-02 20:44:51,523 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:44:51,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425125727] [2022-11-02 20:44:51,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:51,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:51,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:51,529 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:51,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-02 20:44:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:51,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-02 20:44:51,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:51,696 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 20:44:51,696 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:44:51,697 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425125727] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:51,697 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:51,698 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-02 20:44:51,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010143441] [2022-11-02 20:44:51,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:51,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-02 20:44:51,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:51,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-02 20:44:51,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-02 20:44:51,774 INFO L87 Difference]: Start difference. First operand has 28 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 20:44:51,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:51,799 INFO L93 Difference]: Finished difference Result 53 states and 87 transitions. [2022-11-02 20:44:51,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-02 20:44:51,804 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 10 [2022-11-02 20:44:51,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:51,813 INFO L225 Difference]: With dead ends: 53 [2022-11-02 20:44:51,813 INFO L226 Difference]: Without dead ends: 24 [2022-11-02 20:44:51,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 9 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 20:44:51,825 INFO L413 NwaCegarLoop]: 38 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, 38 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 20:44:51,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:44:51,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-11-02 20:44:51,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2022-11-02 20:44:51,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 7 states have call successors, (7), 1 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 20:44:51,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 34 transitions. [2022-11-02 20:44:51,882 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 34 transitions. Word has length 10 [2022-11-02 20:44:51,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:51,883 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 34 transitions. [2022-11-02 20:44:51,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 20:44:51,884 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 34 transitions. [2022-11-02 20:44:51,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-02 20:44:51,885 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:51,886 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:51,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:52,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:52,110 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:44:52,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:52,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1983932575, now seen corresponding path program 1 times [2022-11-02 20:44:52,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:52,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904409827] [2022-11-02 20:44:52,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:52,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:52,402 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 20:44:52,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:52,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904409827] [2022-11-02 20:44:52,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904409827] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:52,403 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:52,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:44:52,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98912843] [2022-11-02 20:44:52,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:52,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:44:52,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:52,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:44:52,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:44:52,406 INFO L87 Difference]: Start difference. First operand 24 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 20:44:52,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:52,501 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2022-11-02 20:44:52,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:44:52,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 10 [2022-11-02 20:44:52,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:52,505 INFO L225 Difference]: With dead ends: 38 [2022-11-02 20:44:52,505 INFO L226 Difference]: Without dead ends: 36 [2022-11-02 20:44:52,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 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 20:44:52,507 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 15 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:52,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 106 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:44:52,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-11-02 20:44:52,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 28. [2022-11-02 20:44:52,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 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 20:44:52,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-11-02 20:44:52,535 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2022-11-02 20:44:52,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:52,536 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-11-02 20:44:52,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 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 20:44:52,542 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-11-02 20:44:52,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-11-02 20:44:52,543 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:52,544 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:52,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-02 20:44:52,544 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:44:52,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:52,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1787143384, now seen corresponding path program 1 times [2022-11-02 20:44:52,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:52,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120741787] [2022-11-02 20:44:52,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:52,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:52,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:52,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:52,580 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120741787] [2022-11-02 20:44:52,581 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-02 20:44:52,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120899882] [2022-11-02 20:44:52,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:52,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:52,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:52,583 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:52,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-02 20:44:52,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:52,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-02 20:44:52,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:52,742 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 20:44:52,742 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:44:52,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120899882] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:52,743 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:52,743 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-02 20:44:52,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770700171] [2022-11-02 20:44:52,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:52,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-02 20:44:52,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:52,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-02 20:44:52,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:44:52,745 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 20:44:52,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:52,766 INFO L93 Difference]: Finished difference Result 44 states and 59 transitions. [2022-11-02 20:44:52,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-02 20:44:52,767 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 12 [2022-11-02 20:44:52,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:52,768 INFO L225 Difference]: With dead ends: 44 [2022-11-02 20:44:52,768 INFO L226 Difference]: Without dead ends: 30 [2022-11-02 20:44:52,768 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-02 20:44:52,770 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 0 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:52,770 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 89 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:44:52,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-11-02 20:44:52,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-11-02 20:44:52,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.3) internal successors, (26), 21 states have internal predecessors, (26), 7 states have call successors, (7), 2 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 20:44:52,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 39 transitions. [2022-11-02 20:44:52,782 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 39 transitions. Word has length 12 [2022-11-02 20:44:52,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:52,783 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 39 transitions. [2022-11-02 20:44:52,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 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 20:44:52,783 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 39 transitions. [2022-11-02 20:44:52,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-02 20:44:52,784 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:52,785 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:52,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:52,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:52,998 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:44:52,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:52,998 INFO L85 PathProgramCache]: Analyzing trace with hash 472519838, now seen corresponding path program 1 times [2022-11-02 20:44:52,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:52,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125289360] [2022-11-02 20:44:52,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:52,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:53,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:53,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-11-02 20:44:53,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:53,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-02 20:44:53,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:53,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125289360] [2022-11-02 20:44:53,293 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125289360] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:53,294 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:53,294 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:44:53,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386405294] [2022-11-02 20:44:53,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:53,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:44:53,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:53,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:44:53,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:44:53,296 INFO L87 Difference]: Start difference. First operand 30 states and 39 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 20:44:53,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:53,370 INFO L93 Difference]: Finished difference Result 44 states and 58 transitions. [2022-11-02 20:44:53,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:44:53,371 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 15 [2022-11-02 20:44:53,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:53,372 INFO L225 Difference]: With dead ends: 44 [2022-11-02 20:44:53,372 INFO L226 Difference]: Without dead ends: 42 [2022-11-02 20:44:53,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 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 20:44:53,374 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 13 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 102 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:53,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 102 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:44:53,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-11-02 20:44:53,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 34. [2022-11-02 20:44:53,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-02 20:44:53,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2022-11-02 20:44:53,389 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 15 [2022-11-02 20:44:53,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:53,389 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2022-11-02 20:44:53,390 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 20:44:53,390 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2022-11-02 20:44:53,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-11-02 20:44:53,391 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:53,391 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:53,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-02 20:44:53,391 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:44:53,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:53,392 INFO L85 PathProgramCache]: Analyzing trace with hash 838495553, now seen corresponding path program 1 times [2022-11-02 20:44:53,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:53,394 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476880038] [2022-11-02 20:44:53,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:53,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:53,418 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:44:53,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [110729202] [2022-11-02 20:44:53,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:53,420 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:53,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:53,426 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:53,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-02 20:44:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:53,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-02 20:44:53,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-02 20:44:53,538 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:44:53,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:53,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476880038] [2022-11-02 20:44:53,539 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:44:53,539 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110729202] [2022-11-02 20:44:53,539 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110729202] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:53,539 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:53,539 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-02 20:44:53,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125768271] [2022-11-02 20:44:53,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:53,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:44:53,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:53,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:44:53,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:44:53,541 INFO L87 Difference]: Start difference. First operand 34 states and 42 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:44:55,618 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:44:55,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:55,831 INFO L93 Difference]: Finished difference Result 51 states and 67 transitions. [2022-11-02 20:44:55,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:44:55,832 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2022-11-02 20:44:55,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:55,833 INFO L225 Difference]: With dead ends: 51 [2022-11-02 20:44:55,834 INFO L226 Difference]: Without dead ends: 48 [2022-11-02 20:44:55,834 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 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 20:44:55,835 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 10 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 2 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:55,835 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 109 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 46 Invalid, 1 Unknown, 0 Unchecked, 2.3s Time] [2022-11-02 20:44:55,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-11-02 20:44:55,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-11-02 20:44:55,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.3) internal successors, (39), 32 states have internal predecessors, (39), 13 states have call successors, (13), 4 states have call predecessors, (13), 4 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-02 20:44:55,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2022-11-02 20:44:55,845 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 20 [2022-11-02 20:44:55,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:55,846 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2022-11-02 20:44:55,846 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, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2022-11-02 20:44:55,846 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2022-11-02 20:44:55,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:44:55,847 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:55,847 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:55,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:56,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:56,054 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:44:56,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:56,054 INFO L85 PathProgramCache]: Analyzing trace with hash 414140572, now seen corresponding path program 1 times [2022-11-02 20:44:56,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:56,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117926500] [2022-11-02 20:44:56,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:56,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:56,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:44:56,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1011852191] [2022-11-02 20:44:56,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:56,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:56,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:56,066 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:56,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-02 20:44:56,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:56,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:44:56,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:56,251 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:44:56,252 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:44:56,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:56,253 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117926500] [2022-11-02 20:44:56,254 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:44:56,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011852191] [2022-11-02 20:44:56,255 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011852191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:56,255 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:56,255 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-02 20:44:56,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113054634] [2022-11-02 20:44:56,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:56,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:44:56,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:56,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:44:56,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:44:56,258 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:44:56,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:56,327 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2022-11-02 20:44:56,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-02 20:44:56,328 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-11-02 20:44:56,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:56,332 INFO L225 Difference]: With dead ends: 68 [2022-11-02 20:44:56,332 INFO L226 Difference]: Without dead ends: 61 [2022-11-02 20:44:56,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:44:56,336 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:56,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 117 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-02 20:44:56,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-11-02 20:44:56,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2022-11-02 20:44:56,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 39 states have (on average 1.205128205128205) internal successors, (47), 41 states have internal predecessors, (47), 13 states have call successors, (13), 7 states have call predecessors, (13), 7 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2022-11-02 20:44:56,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 71 transitions. [2022-11-02 20:44:56,359 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 71 transitions. Word has length 28 [2022-11-02 20:44:56,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:56,359 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 71 transitions. [2022-11-02 20:44:56,359 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:44:56,360 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 71 transitions. [2022-11-02 20:44:56,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-11-02 20:44:56,361 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:56,361 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:56,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:56,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-02 20:44:56,581 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:44:56,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:56,582 INFO L85 PathProgramCache]: Analyzing trace with hash 415868450, now seen corresponding path program 1 times [2022-11-02 20:44:56,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:56,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060686432] [2022-11-02 20:44:56,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:56,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:56,591 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:44:56,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1492337953] [2022-11-02 20:44:56,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:56,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:56,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:56,593 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:56,620 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-02 20:44:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:56,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 10 conjunts are in the unsatisfiable core [2022-11-02 20:44:56,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:56,877 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:44:56,877 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-02 20:44:56,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:56,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060686432] [2022-11-02 20:44:56,878 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:44:56,878 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492337953] [2022-11-02 20:44:56,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492337953] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-02 20:44:56,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-02 20:44:56,879 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-02 20:44:56,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349172108] [2022-11-02 20:44:56,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-02 20:44:56,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-02 20:44:56,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:56,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-02 20:44:56,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:44:56,880 INFO L87 Difference]: Start difference. First operand 60 states and 71 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:44:57,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:57,185 INFO L93 Difference]: Finished difference Result 74 states and 90 transitions. [2022-11-02 20:44:57,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-02 20:44:57,186 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-11-02 20:44:57,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:57,187 INFO L225 Difference]: With dead ends: 74 [2022-11-02 20:44:57,188 INFO L226 Difference]: Without dead ends: 71 [2022-11-02 20:44:57,188 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-02 20:44:57,189 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 14 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:57,189 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 124 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-02 20:44:57,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-11-02 20:44:57,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-11-02 20:44:57,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 48 states have internal predecessors, (56), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-02 20:44:57,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 85 transitions. [2022-11-02 20:44:57,201 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 85 transitions. Word has length 28 [2022-11-02 20:44:57,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:57,201 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 85 transitions. [2022-11-02 20:44:57,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-11-02 20:44:57,202 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 85 transitions. [2022-11-02 20:44:57,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-02 20:44:57,203 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:57,203 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:57,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:57,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:57,430 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:44:57,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:57,430 INFO L85 PathProgramCache]: Analyzing trace with hash 1040101153, now seen corresponding path program 1 times [2022-11-02 20:44:57,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:57,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26384824] [2022-11-02 20:44:57,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:57,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:57,442 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:44:57,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [858838162] [2022-11-02 20:44:57,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:57,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:57,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:57,451 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:57,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-02 20:44:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:57,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-02 20:44:57,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:57,631 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:44:57,631 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:57,727 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-02 20:44:57,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:57,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26384824] [2022-11-02 20:44:57,728 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:44:57,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858838162] [2022-11-02 20:44:57,728 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858838162] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:57,728 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:44:57,728 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2022-11-02 20:44:57,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429216575] [2022-11-02 20:44:57,729 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:57,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-02 20:44:57,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:57,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-02 20:44:57,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-02 20:44:57,730 INFO L87 Difference]: Start difference. First operand 70 states and 85 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 20:44:57,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:44:57,822 INFO L93 Difference]: Finished difference Result 86 states and 107 transitions. [2022-11-02 20:44:57,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-02 20:44:57,823 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 30 [2022-11-02 20:44:57,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:44:57,825 INFO L225 Difference]: With dead ends: 86 [2022-11-02 20:44:57,825 INFO L226 Difference]: Without dead ends: 72 [2022-11-02 20:44:57,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-02 20:44:57,827 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 4 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 117 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-02 20:44:57,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 117 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-02 20:44:57,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-11-02 20:44:57,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-11-02 20:44:57,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 50 states have internal predecessors, (58), 15 states have call successors, (15), 8 states have call predecessors, (15), 8 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2022-11-02 20:44:57,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 87 transitions. [2022-11-02 20:44:57,839 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 87 transitions. Word has length 30 [2022-11-02 20:44:57,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:44:57,840 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 87 transitions. [2022-11-02 20:44:57,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2022-11-02 20:44:57,840 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 87 transitions. [2022-11-02 20:44:57,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-02 20:44:57,841 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:44:57,842 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:44:57,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-02 20:44:58,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-02 20:44:58,062 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:44:58,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:44:58,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1884102282, now seen corresponding path program 1 times [2022-11-02 20:44:58,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:44:58,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034876634] [2022-11-02 20:44:58,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:58,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:44:58,071 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:44:58,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [35349795] [2022-11-02 20:44:58,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:44:58,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:44:58,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:44:58,073 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:44:58,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-02 20:44:58,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-02 20:44:58,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-02 20:44:58,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-02 20:44:58,758 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 15 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-02 20:44:58,758 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-02 20:44:59,314 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 17 proven. 10 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-02 20:44:59,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-02 20:44:59,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034876634] [2022-11-02 20:44:59,314 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-02 20:44:59,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35349795] [2022-11-02 20:44:59,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35349795] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-02 20:44:59,315 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-02 20:44:59,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 15 [2022-11-02 20:44:59,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041757214] [2022-11-02 20:44:59,315 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-02 20:44:59,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-02 20:44:59,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-02 20:44:59,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-02 20:44:59,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-02 20:44:59,317 INFO L87 Difference]: Start difference. First operand 72 states and 87 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-02 20:45:01,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2022-11-02 20:45:05,788 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:45:07,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:45:09,869 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-02 20:45:09,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-02 20:45:09,890 INFO L93 Difference]: Finished difference Result 105 states and 136 transitions. [2022-11-02 20:45:09,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-02 20:45:09,891 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) Word has length 38 [2022-11-02 20:45:09,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-02 20:45:09,892 INFO L225 Difference]: With dead ends: 105 [2022-11-02 20:45:09,892 INFO L226 Difference]: Without dead ends: 97 [2022-11-02 20:45:09,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=93, Invalid=327, Unknown=0, NotChecked=0, Total=420 [2022-11-02 20:45:09,894 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 85 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 84 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2022-11-02 20:45:09,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 141 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 262 Invalid, 4 Unknown, 0 Unchecked, 10.2s Time] [2022-11-02 20:45:09,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-11-02 20:45:09,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2022-11-02 20:45:09,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 60 states have internal predecessors, (70), 22 states have call successors, (22), 9 states have call predecessors, (22), 9 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-11-02 20:45:09,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 113 transitions. [2022-11-02 20:45:09,914 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 113 transitions. Word has length 38 [2022-11-02 20:45:09,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-02 20:45:09,914 INFO L495 AbstractCegarLoop]: Abstraction has 89 states and 113 transitions. [2022-11-02 20:45:09,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 12 states have internal predecessors, (28), 6 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (10), 6 states have call predecessors, (10), 6 states have call successors, (10) [2022-11-02 20:45:09,915 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 113 transitions. [2022-11-02 20:45:09,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-11-02 20:45:09,916 INFO L187 NwaCegarLoop]: Found error trace [2022-11-02 20:45:09,917 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-02 20:45:09,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-02 20:45:10,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-02 20:45:10,123 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-02 20:45:10,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-02 20:45:10,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1109899640, now seen corresponding path program 1 times [2022-11-02 20:45:10,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-02 20:45:10,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495613092] [2022-11-02 20:45:10,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:10,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-02 20:45:10,132 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-02 20:45:10,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [989342350] [2022-11-02 20:45:10,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-02 20:45:10,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-02 20:45:10,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 [2022-11-02 20:45:10,139 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-02 20:45:10,149 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_76cc71cb-fb10-4b5f-92da-2c154b0ffc2a/bin/uautomizer-Dbtcem3rbc/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process