./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 38b53e6a Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 4d17ed8dd7de3007f02b2c3df3a75e1fbb5469b0133c538c149df8a118a565d0 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-38b53e6 [2022-11-25 17:09:22,491 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 17:09:22,494 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 17:09:22,529 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 17:09:22,529 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 17:09:22,530 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 17:09:22,531 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 17:09:22,533 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 17:09:22,535 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 17:09:22,535 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 17:09:22,536 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 17:09:22,537 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 17:09:22,538 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 17:09:22,544 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 17:09:22,547 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 17:09:22,549 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 17:09:22,551 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 17:09:22,553 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 17:09:22,555 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 17:09:22,562 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 17:09:22,565 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 17:09:22,567 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 17:09:22,570 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 17:09:22,571 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 17:09:22,581 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 17:09:22,581 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 17:09:22,582 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 17:09:22,584 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 17:09:22,585 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 17:09:22,586 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 17:09:22,586 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 17:09:22,587 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 17:09:22,589 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 17:09:22,592 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 17:09:22,593 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 17:09:22,594 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 17:09:22,594 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 17:09:22,595 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 17:09:22,595 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 17:09:22,596 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 17:09:22,597 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 17:09:22,598 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 17:09:22,648 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 17:09:22,649 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 17:09:22,650 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 17:09:22,650 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 17:09:22,651 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 17:09:22,651 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 17:09:22,652 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 17:09:22,662 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 17:09:22,663 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 17:09:22,663 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 17:09:22,664 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 17:09:22,664 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 17:09:22,664 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 17:09:22,664 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 17:09:22,665 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 17:09:22,665 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 17:09:22,665 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 17:09:22,666 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 17:09:22,666 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 17:09:22,666 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 17:09:22,667 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 17:09:22,667 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 17:09:22,667 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 17:09:22,667 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 17:09:22,668 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:09:22,668 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 17:09:22,668 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 17:09:22,669 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 17:09:22,669 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 17:09:22,669 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 17:09:22,670 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 17:09:22,670 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 17:09:22,670 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 17:09:22,670 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 17:09:22,671 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4d17ed8dd7de3007f02b2c3df3a75e1fbb5469b0133c538c149df8a118a565d0 [2022-11-25 17:09:22,926 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 17:09:22,961 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 17:09:22,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 17:09:22,966 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 17:09:22,967 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 17:09:22,969 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound100.c [2022-11-25 17:09:26,285 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 17:09:26,595 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 17:09:26,596 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound100.c [2022-11-25 17:09:26,609 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/data/73f42fbec/8cfef0c4aa66474fa6581096dd9ef72f/FLAG2625b71c0 [2022-11-25 17:09:26,626 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/data/73f42fbec/8cfef0c4aa66474fa6581096dd9ef72f [2022-11-25 17:09:26,629 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 17:09:26,631 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 17:09:26,633 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 17:09:26,633 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 17:09:26,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 17:09:26,639 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:09:26" (1/1) ... [2022-11-25 17:09:26,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3eab4c20 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:09:26, skipping insertion in model container [2022-11-25 17:09:26,641 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:09:26" (1/1) ... [2022-11-25 17:09:26,650 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 17:09:26,682 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 17:09:26,859 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound100.c[524,537] [2022-11-25 17:09:26,906 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:09:26,922 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 17:09:26,942 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/sv-benchmarks/c/nla-digbench-scaling/prod4br-ll_unwindbound100.c[524,537] [2022-11-25 17:09:26,961 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 17:09:26,976 INFO L208 MainTranslator]: Completed translation [2022-11-25 17:09:26,977 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:09:26 WrapperNode [2022-11-25 17:09:26,977 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 17:09:26,978 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 17:09:26,978 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 17:09:26,978 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 17:09:26,986 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:09:26" (1/1) ... [2022-11-25 17:09:26,991 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:09:26" (1/1) ... [2022-11-25 17:09:27,012 INFO L138 Inliner]: procedures = 14, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 59 [2022-11-25 17:09:27,012 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 17:09:27,013 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 17:09:27,013 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 17:09:27,013 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 17:09:27,027 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:09:26" (1/1) ... [2022-11-25 17:09:27,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:09:26" (1/1) ... [2022-11-25 17:09:27,036 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:09:26" (1/1) ... [2022-11-25 17:09:27,036 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:09:26" (1/1) ... [2022-11-25 17:09:27,040 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:09:26" (1/1) ... [2022-11-25 17:09:27,048 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:09:26" (1/1) ... [2022-11-25 17:09:27,049 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:09:26" (1/1) ... [2022-11-25 17:09:27,050 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:09:26" (1/1) ... [2022-11-25 17:09:27,054 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 17:09:27,055 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 17:09:27,055 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 17:09:27,056 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 17:09:27,057 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:09:26" (1/1) ... [2022-11-25 17:09:27,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 17:09:27,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:09:27,093 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 17:09:27,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 17:09:27,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 17:09:27,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 17:09:27,139 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 17:09:27,139 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 17:09:27,140 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 17:09:27,140 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 17:09:27,205 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 17:09:27,207 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 17:09:27,383 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 17:09:27,390 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 17:09:27,390 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-11-25 17:09:27,392 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:09:27 BoogieIcfgContainer [2022-11-25 17:09:27,392 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 17:09:27,394 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 17:09:27,394 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 17:09:27,398 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 17:09:27,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:09:26" (1/3) ... [2022-11-25 17:09:27,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e693d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:09:27, skipping insertion in model container [2022-11-25 17:09:27,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:09:26" (2/3) ... [2022-11-25 17:09:27,400 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37e693d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:09:27, skipping insertion in model container [2022-11-25 17:09:27,400 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:09:27" (3/3) ... [2022-11-25 17:09:27,402 INFO L112 eAbstractionObserver]: Analyzing ICFG prod4br-ll_unwindbound100.c [2022-11-25 17:09:27,422 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 17:09:27,423 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 17:09:27,518 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 17:09:27,525 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;@1cafdd0a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 17:09:27,525 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 17:09:27,530 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:09:27,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-25 17:09:27,537 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:09:27,538 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:09:27,539 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:09:27,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:09:27,544 INFO L85 PathProgramCache]: Analyzing trace with hash -563977895, now seen corresponding path program 1 times [2022-11-25 17:09:27,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:09:27,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897357893] [2022-11-25 17:09:27,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:27,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:09:27,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:27,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:09:27,701 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897357893] [2022-11-25 17:09:27,702 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 17:09:27,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576166075] [2022-11-25 17:09:27,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:27,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:27,703 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:09:27,707 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:09:27,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 17:09:27,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:27,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 17:09:27,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:09:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:09:27,876 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:09:27,878 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576166075] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:09:27,878 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:09:27,878 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 17:09:27,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151952723] [2022-11-25 17:09:27,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:09:27,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 17:09:27,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:09:27,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 17:09:27,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:09:27,962 INFO L87 Difference]: Start difference. First operand has 23 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 18 states have internal predecessors, (26), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:09:27,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:09:27,999 INFO L93 Difference]: Finished difference Result 43 states and 63 transitions. [2022-11-25 17:09:28,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 17:09:28,002 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-25 17:09:28,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:09:28,012 INFO L225 Difference]: With dead ends: 43 [2022-11-25 17:09:28,013 INFO L226 Difference]: Without dead ends: 19 [2022-11-25 17:09:28,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 17:09:28,025 INFO L413 NwaCegarLoop]: 29 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, 29 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:09:28,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:09:28,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-11-25 17:09:28,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-11-25 17:09:28,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:09:28,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 25 transitions. [2022-11-25 17:09:28,076 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 25 transitions. Word has length 9 [2022-11-25 17:09:28,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:09:28,078 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 25 transitions. [2022-11-25 17:09:28,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.0) internal successors, (8), 2 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-25 17:09:28,078 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 25 transitions. [2022-11-25 17:09:28,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 17:09:28,081 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:09:28,081 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:09:28,095 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 17:09:28,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2022-11-25 17:09:28,287 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:09:28,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:09:28,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1986058659, now seen corresponding path program 1 times [2022-11-25 17:09:28,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:09:28,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767373435] [2022-11-25 17:09:28,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:28,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:09:28,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:28,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:09:28,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767373435] [2022-11-25 17:09:28,342 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 17:09:28,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866343029] [2022-11-25 17:09:28,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:28,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:28,343 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:09:28,359 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:09:28,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 17:09:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:28,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-25 17:09:28,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:09:28,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:09:28,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:09:28,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866343029] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:09:28,496 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:09:28,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-25 17:09:28,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732262501] [2022-11-25 17:09:28,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:09:28,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-25 17:09:28,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:09:28,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-25 17:09:28,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:09:28,504 INFO L87 Difference]: Start difference. First operand 19 states and 25 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2022-11-25 17:09:28,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:09:28,546 INFO L93 Difference]: Finished difference Result 29 states and 36 transitions. [2022-11-25 17:09:28,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-25 17:09:28,548 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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 [2022-11-25 17:09:28,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:09:28,549 INFO L225 Difference]: With dead ends: 29 [2022-11-25 17:09:28,549 INFO L226 Difference]: Without dead ends: 21 [2022-11-25 17:09:28,550 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-25 17:09:28,551 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 0 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:09:28,552 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 63 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:09:28,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-11-25 17:09:28,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-11-25 17:09:28,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:09:28,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 27 transitions. [2022-11-25 17:09:28,559 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 27 transitions. Word has length 10 [2022-11-25 17:09:28,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:09:28,559 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 27 transitions. [2022-11-25 17:09:28,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 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) [2022-11-25 17:09:28,560 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 27 transitions. [2022-11-25 17:09:28,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-25 17:09:28,561 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:09:28,561 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:09:28,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 17:09:28,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-25 17:09:28,767 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:09:28,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:09:28,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1984271199, now seen corresponding path program 1 times [2022-11-25 17:09:28,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:09:28,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919761915] [2022-11-25 17:09:28,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:28,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:09:28,792 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:09:28,801 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [240116750] [2022-11-25 17:09:28,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:28,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:28,802 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:09:28,805 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:09:28,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 17:09:28,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:28,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-25 17:09:28,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:09:29,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:09:29,095 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:09:29,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:09:29,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919761915] [2022-11-25 17:09:29,096 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:09:29,096 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240116750] [2022-11-25 17:09:29,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240116750] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:09:29,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:09:29,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-25 17:09:29,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925173987] [2022-11-25 17:09:29,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:09:29,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 17:09:29,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:09:29,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 17:09:29,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-25 17:09:29,099 INFO L87 Difference]: Start difference. First operand 21 states and 27 transitions. Second operand has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 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) [2022-11-25 17:09:29,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:09:29,260 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2022-11-25 17:09:29,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 17:09:29,261 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 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 [2022-11-25 17:09:29,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:09:29,262 INFO L225 Difference]: With dead ends: 34 [2022-11-25 17:09:29,262 INFO L226 Difference]: Without dead ends: 32 [2022-11-25 17:09:29,263 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:09:29,264 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 47 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:09:29,265 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 51 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:09:29,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-11-25 17:09:29,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 26. [2022-11-25 17:09:29,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 21 states have internal predecessors, (25), 4 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:09:29,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2022-11-25 17:09:29,275 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 10 [2022-11-25 17:09:29,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:09:29,275 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2022-11-25 17:09:29,276 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 6 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) [2022-11-25 17:09:29,276 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2022-11-25 17:09:29,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-25 17:09:29,277 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:09:29,277 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:09:29,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 17:09:29,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:29,483 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:09:29,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:09:29,484 INFO L85 PathProgramCache]: Analyzing trace with hash -1194524114, now seen corresponding path program 1 times [2022-11-25 17:09:29,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:09:29,484 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213101567] [2022-11-25 17:09:29,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:29,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:09:29,500 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:09:29,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702500105] [2022-11-25 17:09:29,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:29,501 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:29,501 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:09:29,502 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:09:29,522 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 17:09:29,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:29,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2022-11-25 17:09:29,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:09:29,912 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:09:29,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:09:30,160 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:09:30,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:09:30,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213101567] [2022-11-25 17:09:30,161 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:09:30,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702500105] [2022-11-25 17:09:30,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702500105] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:09:30,161 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:09:30,162 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2022-11-25 17:09:30,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786258709] [2022-11-25 17:09:30,162 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:09:30,163 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-25 17:09:30,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:09:30,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-25 17:09:30,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:09:30,167 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:09:30,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:09:30,676 INFO L93 Difference]: Finished difference Result 47 states and 64 transitions. [2022-11-25 17:09:30,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-11-25 17:09:30,677 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 16 [2022-11-25 17:09:30,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:09:30,680 INFO L225 Difference]: With dead ends: 47 [2022-11-25 17:09:30,680 INFO L226 Difference]: Without dead ends: 45 [2022-11-25 17:09:30,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2022-11-25 17:09:30,682 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:09:30,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 71 Invalid, 218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:09:30,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-11-25 17:09:30,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 31. [2022-11-25 17:09:30,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 25 states have internal predecessors, (28), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (4), 2 states have call predecessors, (4), 4 states have call successors, (4) [2022-11-25 17:09:30,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2022-11-25 17:09:30,702 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 16 [2022-11-25 17:09:30,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:09:30,703 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2022-11-25 17:09:30,703 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:09:30,709 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2022-11-25 17:09:30,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-25 17:09:30,711 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:09:30,711 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:09:30,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 17:09:30,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:30,917 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:09:30,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:09:30,918 INFO L85 PathProgramCache]: Analyzing trace with hash -1756733383, now seen corresponding path program 1 times [2022-11-25 17:09:30,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:09:30,918 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441537808] [2022-11-25 17:09:30,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:30,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:09:30,931 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:09:30,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [157543176] [2022-11-25 17:09:30,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:30,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:30,932 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:09:30,933 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:09:30,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 17:09:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:31,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 17:09:31,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:09:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:09:31,070 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:09:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:09:31,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:09:31,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441537808] [2022-11-25 17:09:31,122 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:09:31,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157543176] [2022-11-25 17:09:31,123 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157543176] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:09:31,123 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:09:31,124 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-25 17:09:31,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031806328] [2022-11-25 17:09:31,124 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:09:31,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:09:31,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:09:31,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:09:31,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:09:31,127 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:09:31,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:09:31,247 INFO L93 Difference]: Finished difference Result 95 states and 115 transitions. [2022-11-25 17:09:31,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 17:09:31,248 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-11-25 17:09:31,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:09:31,253 INFO L225 Difference]: With dead ends: 95 [2022-11-25 17:09:31,253 INFO L226 Difference]: Without dead ends: 85 [2022-11-25 17:09:31,253 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-25 17:09:31,255 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 68 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 17:09:31,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 120 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 17:09:31,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-11-25 17:09:31,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 79. [2022-11-25 17:09:31,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 61 states have internal predecessors, (77), 13 states have call successors, (13), 9 states have call predecessors, (13), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 17:09:31,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 99 transitions. [2022-11-25 17:09:31,301 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 99 transitions. Word has length 19 [2022-11-25 17:09:31,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:09:31,302 INFO L495 AbstractCegarLoop]: Abstraction has 79 states and 99 transitions. [2022-11-25 17:09:31,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 8 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:09:31,302 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 99 transitions. [2022-11-25 17:09:31,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-25 17:09:31,305 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:09:31,305 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:09:31,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-25 17:09:31,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:31,511 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:09:31,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:09:31,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1754945923, now seen corresponding path program 1 times [2022-11-25 17:09:31,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:09:31,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192069131] [2022-11-25 17:09:31,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:31,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:09:31,524 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:09:31,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1264032321] [2022-11-25 17:09:31,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:31,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:31,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:09:31,526 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:09:31,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 17:09:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:31,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-25 17:09:31,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:09:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:09:31,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:09:33,617 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:09:33,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:09:33,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192069131] [2022-11-25 17:09:33,617 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:09:33,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264032321] [2022-11-25 17:09:33,618 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264032321] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:09:33,618 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:09:33,618 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2022-11-25 17:09:33,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208806889] [2022-11-25 17:09:33,619 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:09:33,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-25 17:09:33,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:09:33,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-25 17:09:33,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2022-11-25 17:09:33,621 INFO L87 Difference]: Start difference. First operand 79 states and 99 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:09:36,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:09:36,490 INFO L93 Difference]: Finished difference Result 119 states and 156 transitions. [2022-11-25 17:09:36,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-25 17:09:36,491 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 19 [2022-11-25 17:09:36,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:09:36,493 INFO L225 Difference]: With dead ends: 119 [2022-11-25 17:09:36,493 INFO L226 Difference]: Without dead ends: 113 [2022-11-25 17:09:36,493 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2022-11-25 17:09:36,494 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 124 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:09:36,495 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [124 Valid, 89 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-25 17:09:36,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-25 17:09:36,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 71. [2022-11-25 17:09:36,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 54 states have (on average 1.3333333333333333) internal successors, (72), 56 states have internal predecessors, (72), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-25 17:09:36,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2022-11-25 17:09:36,519 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 19 [2022-11-25 17:09:36,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:09:36,519 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2022-11-25 17:09:36,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:09:36,520 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2022-11-25 17:09:36,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-25 17:09:36,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:09:36,521 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:09:36,534 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 17:09:36,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-25 17:09:36,727 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:09:36,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:09:36,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1942139802, now seen corresponding path program 1 times [2022-11-25 17:09:36,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:09:36,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384845911] [2022-11-25 17:09:36,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:36,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:09:36,752 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:09:36,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [933930931] [2022-11-25 17:09:36,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:36,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:36,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:09:36,756 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:09:36,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 17:09:36,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:36,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 13 conjunts are in the unsatisfiable core [2022-11-25 17:09:36,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:09:36,932 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-11-25 17:09:36,932 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:09:36,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:09:36,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384845911] [2022-11-25 17:09:36,933 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:09:36,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933930931] [2022-11-25 17:09:36,933 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933930931] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:09:36,933 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:09:36,933 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 17:09:36,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626624883] [2022-11-25 17:09:36,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:09:36,934 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:09:36,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:09:36,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:09:36,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:09:36,935 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:09:37,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:09:37,147 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2022-11-25 17:09:37,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 17:09:37,148 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2022-11-25 17:09:37,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:09:37,149 INFO L225 Difference]: With dead ends: 108 [2022-11-25 17:09:37,149 INFO L226 Difference]: Without dead ends: 96 [2022-11-25 17:09:37,149 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2022-11-25 17:09:37,150 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 57 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:09:37,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 74 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:09:37,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-11-25 17:09:37,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 91. [2022-11-25 17:09:37,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 71 states have (on average 1.3380281690140845) internal successors, (95), 73 states have internal predecessors, (95), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-25 17:09:37,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 117 transitions. [2022-11-25 17:09:37,208 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 117 transitions. Word has length 21 [2022-11-25 17:09:37,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:09:37,209 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 117 transitions. [2022-11-25 17:09:37,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:09:37,209 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 117 transitions. [2022-11-25 17:09:37,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-25 17:09:37,211 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:09:37,211 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:09:37,228 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 17:09:37,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:37,418 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:09:37,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:09:37,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1954557947, now seen corresponding path program 1 times [2022-11-25 17:09:37,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:09:37,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435048945] [2022-11-25 17:09:37,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:37,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:09:37,434 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:09:37,434 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1723588291] [2022-11-25 17:09:37,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:37,434 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:37,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:09:37,438 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:09:37,443 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 17:09:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:37,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjunts are in the unsatisfiable core [2022-11-25 17:09:37,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:09:37,627 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 17:09:37,627 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 17:09:37,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:09:37,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435048945] [2022-11-25 17:09:37,628 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:09:37,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723588291] [2022-11-25 17:09:37,628 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723588291] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 17:09:37,628 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 17:09:37,628 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 17:09:37,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260129657] [2022-11-25 17:09:37,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:09:37,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 17:09:37,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:09:37,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 17:09:37,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-25 17:09:37,630 INFO L87 Difference]: Start difference. First operand 91 states and 117 transitions. Second operand has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:09:37,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:09:37,958 INFO L93 Difference]: Finished difference Result 217 states and 293 transitions. [2022-11-25 17:09:37,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 17:09:37,959 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 32 [2022-11-25 17:09:37,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:09:37,960 INFO L225 Difference]: With dead ends: 217 [2022-11-25 17:09:37,960 INFO L226 Difference]: Without dead ends: 162 [2022-11-25 17:09:37,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2022-11-25 17:09:37,962 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 18 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:09:37,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 170 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:09:37,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-11-25 17:09:38,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 126. [2022-11-25 17:09:38,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 101 states have (on average 1.3366336633663367) internal successors, (135), 103 states have internal predecessors, (135), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-25 17:09:38,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 167 transitions. [2022-11-25 17:09:38,008 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 167 transitions. Word has length 32 [2022-11-25 17:09:38,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:09:38,008 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 167 transitions. [2022-11-25 17:09:38,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.7142857142857144) internal successors, (19), 7 states have internal predecessors, (19), 3 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-11-25 17:09:38,009 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 167 transitions. [2022-11-25 17:09:38,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-11-25 17:09:38,010 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:09:38,010 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:09:38,021 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 17:09:38,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:38,216 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:09:38,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:09:38,217 INFO L85 PathProgramCache]: Analyzing trace with hash 346264643, now seen corresponding path program 1 times [2022-11-25 17:09:38,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:09:38,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685457111] [2022-11-25 17:09:38,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:38,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:09:38,227 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:09:38,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803224087] [2022-11-25 17:09:38,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:38,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:38,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:09:38,228 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:09:38,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 17:09:38,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 17:09:38,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-25 17:09:38,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:09:38,487 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-25 17:09:38,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:09:38,560 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 17:09:38,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:09:38,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685457111] [2022-11-25 17:09:38,561 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:09:38,561 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803224087] [2022-11-25 17:09:38,561 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803224087] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 17:09:38,561 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 17:09:38,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 14 [2022-11-25 17:09:38,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621621629] [2022-11-25 17:09:38,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 17:09:38,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 17:09:38,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:09:38,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 17:09:38,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:09:38,563 INFO L87 Difference]: Start difference. First operand 126 states and 167 transitions. Second operand has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:09:38,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:09:38,839 INFO L93 Difference]: Finished difference Result 133 states and 173 transitions. [2022-11-25 17:09:38,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 17:09:38,839 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2022-11-25 17:09:38,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:09:38,843 INFO L225 Difference]: With dead ends: 133 [2022-11-25 17:09:38,843 INFO L226 Difference]: Without dead ends: 113 [2022-11-25 17:09:38,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-25 17:09:38,848 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 4 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 17:09:38,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 89 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 17:09:38,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-11-25 17:09:38,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 93. [2022-11-25 17:09:38,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 76 states have (on average 1.2894736842105263) internal successors, (98), 77 states have internal predecessors, (98), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2022-11-25 17:09:38,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 119 transitions. [2022-11-25 17:09:38,890 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 119 transitions. Word has length 32 [2022-11-25 17:09:38,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:09:38,891 INFO L495 AbstractCegarLoop]: Abstraction has 93 states and 119 transitions. [2022-11-25 17:09:38,891 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-11-25 17:09:38,891 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 119 transitions. [2022-11-25 17:09:38,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-11-25 17:09:38,901 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:09:38,901 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:09:38,912 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 17:09:39,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:39,108 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:09:39,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:09:39,109 INFO L85 PathProgramCache]: Analyzing trace with hash 136508765, now seen corresponding path program 2 times [2022-11-25 17:09:39,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:09:39,109 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897379263] [2022-11-25 17:09:39,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:39,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:09:39,121 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:09:39,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2097832093] [2022-11-25 17:09:39,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 17:09:39,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:39,122 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:09:39,123 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:09:39,154 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 17:09:39,207 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 17:09:39,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 17:09:39,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-25 17:09:39,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 17:09:39,338 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-25 17:09:39,339 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 17:09:39,481 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 8 proven. 38 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 17:09:39,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 17:09:39,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897379263] [2022-11-25 17:09:39,482 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 17:09:39,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097832093] [2022-11-25 17:09:39,482 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097832093] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 17:09:39,482 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 17:09:39,483 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-25 17:09:39,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213412225] [2022-11-25 17:09:39,483 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 17:09:39,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-25 17:09:39,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 17:09:39,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-25 17:09:39,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-25 17:09:39,485 INFO L87 Difference]: Start difference. First operand 93 states and 119 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:09:39,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 17:09:39,720 INFO L93 Difference]: Finished difference Result 239 states and 325 transitions. [2022-11-25 17:09:39,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 17:09:39,720 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 46 [2022-11-25 17:09:39,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 17:09:39,722 INFO L225 Difference]: With dead ends: 239 [2022-11-25 17:09:39,722 INFO L226 Difference]: Without dead ends: 231 [2022-11-25 17:09:39,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-11-25 17:09:39,724 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 112 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 17:09:39,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 189 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 17:09:39,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2022-11-25 17:09:39,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 231. [2022-11-25 17:09:39,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 190 states have (on average 1.2736842105263158) internal successors, (242), 191 states have internal predecessors, (242), 29 states have call successors, (29), 11 states have call predecessors, (29), 11 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2022-11-25 17:09:39,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 299 transitions. [2022-11-25 17:09:39,801 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 299 transitions. Word has length 46 [2022-11-25 17:09:39,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 17:09:39,801 INFO L495 AbstractCegarLoop]: Abstraction has 231 states and 299 transitions. [2022-11-25 17:09:39,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 14 states have internal predecessors, (62), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 17:09:39,801 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 299 transitions. [2022-11-25 17:09:39,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-11-25 17:09:39,806 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 17:09:39,806 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 17:09:39,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2022-11-25 17:09:40,012 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 17:09:40,012 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 17:09:40,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 17:09:40,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1689445411, now seen corresponding path program 3 times [2022-11-25 17:09:40,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 17:09:40,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013256687] [2022-11-25 17:09:40,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 17:09:40,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 17:09:40,046 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 17:09:40,047 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [395261138] [2022-11-25 17:09:40,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 17:09:40,047 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 17:09:40,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 17:09:40,048 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 17:09:40,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d5536e59-492f-45ae-a4db-8d04615e9756/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process