./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.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_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/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_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/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_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/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 776d32abf1ae3b62e7ad4a02cd7c02c0cc6433852a1fe73b7d30c6e216da832a --- 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 18:19:23,220 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-25 18:19:23,223 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-25 18:19:23,263 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-25 18:19:23,263 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-25 18:19:23,267 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-25 18:19:23,270 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-25 18:19:23,275 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-25 18:19:23,277 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-25 18:19:23,283 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-25 18:19:23,285 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-25 18:19:23,287 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-25 18:19:23,288 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-25 18:19:23,290 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-25 18:19:23,291 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-25 18:19:23,293 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-25 18:19:23,295 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-25 18:19:23,296 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-25 18:19:23,298 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-25 18:19:23,304 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-25 18:19:23,306 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-25 18:19:23,308 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-25 18:19:23,310 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-25 18:19:23,311 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-25 18:19:23,321 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-25 18:19:23,321 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-25 18:19:23,322 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-25 18:19:23,324 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-25 18:19:23,324 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-25 18:19:23,325 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-25 18:19:23,326 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-25 18:19:23,328 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-25 18:19:23,330 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-25 18:19:23,331 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-25 18:19:23,332 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-25 18:19:23,333 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-25 18:19:23,334 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-25 18:19:23,334 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-25 18:19:23,334 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-25 18:19:23,335 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-25 18:19:23,336 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-25 18:19:23,339 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-25 18:19:23,380 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-25 18:19:23,381 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-25 18:19:23,382 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-25 18:19:23,382 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-25 18:19:23,383 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-25 18:19:23,383 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-25 18:19:23,384 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-25 18:19:23,384 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-25 18:19:23,384 INFO L138 SettingsManager]: * Use SBE=true [2022-11-25 18:19:23,384 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-25 18:19:23,385 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-25 18:19:23,386 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-25 18:19:23,386 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-25 18:19:23,386 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-25 18:19:23,386 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-25 18:19:23,387 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-25 18:19:23,387 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-25 18:19:23,387 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-25 18:19:23,387 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-25 18:19:23,388 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-25 18:19:23,388 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-25 18:19:23,388 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-25 18:19:23,388 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-25 18:19:23,388 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-25 18:19:23,389 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:19:23,389 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-25 18:19:23,389 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-25 18:19:23,389 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-25 18:19:23,390 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-25 18:19:23,390 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-25 18:19:23,390 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-25 18:19:23,390 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-25 18:19:23,391 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-25 18:19:23,391 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-25 18:19:23,391 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_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 776d32abf1ae3b62e7ad4a02cd7c02c0cc6433852a1fe73b7d30c6e216da832a [2022-11-25 18:19:23,711 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-25 18:19:23,745 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-25 18:19:23,747 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-25 18:19:23,749 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-25 18:19:23,749 INFO L275 PluginConnector]: CDTParser initialized [2022-11-25 18:19:23,750 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/../../sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c [2022-11-25 18:19:26,809 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-25 18:19:26,984 INFO L351 CDTParser]: Found 1 translation units. [2022-11-25 18:19:26,984 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c [2022-11-25 18:19:26,991 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/data/fa42368b9/528c98ab2178460d934366cf4c1a496d/FLAGed85797b4 [2022-11-25 18:19:27,013 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/data/fa42368b9/528c98ab2178460d934366cf4c1a496d [2022-11-25 18:19:27,016 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-25 18:19:27,020 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-25 18:19:27,023 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-25 18:19:27,023 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-25 18:19:27,027 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-25 18:19:27,028 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:19:27" (1/1) ... [2022-11-25 18:19:27,032 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11e22723 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:27, skipping insertion in model container [2022-11-25 18:19:27,033 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 06:19:27" (1/1) ... [2022-11-25 18:19:27,042 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-25 18:19:27,065 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-25 18:19:27,192 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_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c[490,503] [2022-11-25 18:19:27,216 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:19:27,226 INFO L203 MainTranslator]: Completed pre-run [2022-11-25 18:19:27,236 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_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/sv-benchmarks/c/nla-digbench-scaling/egcd3-ll_valuebound10.c[490,503] [2022-11-25 18:19:27,246 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-25 18:19:27,258 INFO L208 MainTranslator]: Completed translation [2022-11-25 18:19:27,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:27 WrapperNode [2022-11-25 18:19:27,259 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-25 18:19:27,259 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-25 18:19:27,260 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-25 18:19:27,260 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-25 18:19:27,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:27" (1/1) ... [2022-11-25 18:19:27,272 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:27" (1/1) ... [2022-11-25 18:19:27,286 INFO L138 Inliner]: procedures = 14, calls = 16, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 80 [2022-11-25 18:19:27,287 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-25 18:19:27,287 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-25 18:19:27,287 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-25 18:19:27,287 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-25 18:19:27,296 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:27" (1/1) ... [2022-11-25 18:19:27,296 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:27" (1/1) ... [2022-11-25 18:19:27,298 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:27" (1/1) ... [2022-11-25 18:19:27,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:27" (1/1) ... [2022-11-25 18:19:27,306 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:27" (1/1) ... [2022-11-25 18:19:27,312 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:27" (1/1) ... [2022-11-25 18:19:27,313 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:27" (1/1) ... [2022-11-25 18:19:27,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:27" (1/1) ... [2022-11-25 18:19:27,316 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-25 18:19:27,317 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-25 18:19:27,317 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-25 18:19:27,317 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-25 18:19:27,318 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:27" (1/1) ... [2022-11-25 18:19:27,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-25 18:19:27,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:27,353 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-25 18:19:27,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-25 18:19:27,388 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-25 18:19:27,389 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-11-25 18:19:27,390 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-11-25 18:19:27,390 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-25 18:19:27,391 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-25 18:19:27,391 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-25 18:19:27,395 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-25 18:19:27,396 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-25 18:19:27,463 INFO L235 CfgBuilder]: Building ICFG [2022-11-25 18:19:27,465 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-25 18:19:27,619 INFO L276 CfgBuilder]: Performing block encoding [2022-11-25 18:19:27,625 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-25 18:19:27,626 INFO L300 CfgBuilder]: Removed 3 assume(true) statements. [2022-11-25 18:19:27,627 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:19:27 BoogieIcfgContainer [2022-11-25 18:19:27,628 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-25 18:19:27,630 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-25 18:19:27,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-25 18:19:27,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-25 18:19:27,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 06:19:27" (1/3) ... [2022-11-25 18:19:27,637 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a3f85d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:19:27, skipping insertion in model container [2022-11-25 18:19:27,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 06:19:27" (2/3) ... [2022-11-25 18:19:27,639 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a3f85d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 06:19:27, skipping insertion in model container [2022-11-25 18:19:27,639 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 06:19:27" (3/3) ... [2022-11-25 18:19:27,642 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd3-ll_valuebound10.c [2022-11-25 18:19:27,661 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-25 18:19:27,662 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-25 18:19:27,730 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-25 18:19:27,738 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;@3d8cf49b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-25 18:19:27,738 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-25 18:19:27,744 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2022-11-25 18:19:27,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-11-25 18:19:27,752 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:19:27,753 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:27,754 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:19:27,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:27,761 INFO L85 PathProgramCache]: Analyzing trace with hash 872320404, now seen corresponding path program 1 times [2022-11-25 18:19:27,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:27,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238771482] [2022-11-25 18:19:27,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:27,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:27,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:27,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:27,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238771482] [2022-11-25 18:19:27,963 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-25 18:19:27,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900373845] [2022-11-25 18:19:27,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:27,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:27,964 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:27,970 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:27,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-25 18:19:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:28,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-25 18:19:28,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:28,145 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-25 18:19:28,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:19:28,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900373845] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:28,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:28,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-25 18:19:28,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833724751] [2022-11-25 18:19:28,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:28,154 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-25 18:19:28,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:28,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-25 18:19:28,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-25 18:19:28,185 INFO L87 Difference]: Start difference. First operand has 35 states, 22 states have (on average 1.5454545454545454) internal successors, (34), 23 states have internal predecessors, (34), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 18:19:28,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:19:28,210 INFO L93 Difference]: Finished difference Result 67 states and 109 transitions. [2022-11-25 18:19:28,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-25 18:19:28,212 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 29 [2022-11-25 18:19:28,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:19:28,220 INFO L225 Difference]: With dead ends: 67 [2022-11-25 18:19:28,220 INFO L226 Difference]: Without dead ends: 31 [2022-11-25 18:19:28,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 28 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 18:19:28,226 INFO L413 NwaCegarLoop]: 44 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, 44 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 18:19:28,227 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:19:28,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-11-25 18:19:28,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-11-25 18:19:28,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 18:19:28,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 40 transitions. [2022-11-25 18:19:28,266 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 40 transitions. Word has length 29 [2022-11-25 18:19:28,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:19:28,267 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 40 transitions. [2022-11-25 18:19:28,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.5) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 18:19:28,267 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 40 transitions. [2022-11-25 18:19:28,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-11-25 18:19:28,269 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:19:28,269 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:28,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-25 18:19:28,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:28,475 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:19:28,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:28,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1714405113, now seen corresponding path program 1 times [2022-11-25 18:19:28,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:28,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988045338] [2022-11-25 18:19:28,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:28,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:28,513 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:19:28,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1411186297] [2022-11-25 18:19:28,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:28,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:28,522 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:28,523 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:28,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-25 18:19:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:28,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-25 18:19:28,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:28,734 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 18:19:28,734 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:19:28,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:28,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988045338] [2022-11-25 18:19:28,735 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:19:28,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411186297] [2022-11-25 18:19:28,735 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411186297] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:28,735 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:28,736 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-25 18:19:28,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216615456] [2022-11-25 18:19:28,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:28,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-25 18:19:28,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:28,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-25 18:19:28,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:19:28,738 INFO L87 Difference]: Start difference. First operand 31 states and 40 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 18:19:28,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:19:28,902 INFO L93 Difference]: Finished difference Result 50 states and 65 transitions. [2022-11-25 18:19:28,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:19:28,903 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 30 [2022-11-25 18:19:28,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:19:28,904 INFO L225 Difference]: With dead ends: 50 [2022-11-25 18:19:28,904 INFO L226 Difference]: Without dead ends: 43 [2022-11-25 18:19:28,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:19:28,909 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 32 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:19:28,910 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 113 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:19:28,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-11-25 18:19:28,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2022-11-25 18:19:28,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 9 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2022-11-25 18:19:28,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 42 transitions. [2022-11-25 18:19:28,930 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 42 transitions. Word has length 30 [2022-11-25 18:19:28,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:19:28,931 INFO L495 AbstractCegarLoop]: Abstraction has 33 states and 42 transitions. [2022-11-25 18:19:28,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 states have internal predecessors, (15), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 18:19:28,932 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 42 transitions. [2022-11-25 18:19:28,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-25 18:19:28,933 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:19:28,933 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:28,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-25 18:19:29,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2022-11-25 18:19:29,138 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:19:29,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:29,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1825736765, now seen corresponding path program 1 times [2022-11-25 18:19:29,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:29,139 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351844370] [2022-11-25 18:19:29,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:29,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:29,158 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:19:29,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [133339681] [2022-11-25 18:19:29,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:29,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:29,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:29,160 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:29,186 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-25 18:19:29,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:29,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 18:19:29,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 18:19:29,361 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:19:29,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:29,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351844370] [2022-11-25 18:19:29,362 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:19:29,362 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133339681] [2022-11-25 18:19:29,362 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133339681] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:29,363 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:29,363 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-11-25 18:19:29,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100460349] [2022-11-25 18:19:29,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:29,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-25 18:19:29,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:29,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-25 18:19:29,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-11-25 18:19:29,365 INFO L87 Difference]: Start difference. First operand 33 states and 42 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 18:19:29,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:19:29,488 INFO L93 Difference]: Finished difference Result 49 states and 63 transitions. [2022-11-25 18:19:29,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-25 18:19:29,489 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) Word has length 33 [2022-11-25 18:19:29,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:19:29,490 INFO L225 Difference]: With dead ends: 49 [2022-11-25 18:19:29,491 INFO L226 Difference]: Without dead ends: 47 [2022-11-25 18:19:29,491 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:19:29,492 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 23 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:19:29,493 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 161 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:19:29,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-11-25 18:19:29,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-11-25 18:19:29,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 29 states have (on average 1.206896551724138) internal successors, (35), 30 states have internal predecessors, (35), 13 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2022-11-25 18:19:29,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 60 transitions. [2022-11-25 18:19:29,526 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 60 transitions. Word has length 33 [2022-11-25 18:19:29,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:19:29,527 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 60 transitions. [2022-11-25 18:19:29,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 18:19:29,528 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 60 transitions. [2022-11-25 18:19:29,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-11-25 18:19:29,529 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:19:29,530 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:29,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-25 18:19:29,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:29,735 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:19:29,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:29,735 INFO L85 PathProgramCache]: Analyzing trace with hash -1547103247, now seen corresponding path program 1 times [2022-11-25 18:19:29,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:29,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072832244] [2022-11-25 18:19:29,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:29,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:29,754 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:19:29,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1374018820] [2022-11-25 18:19:29,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:29,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:29,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:29,756 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:29,778 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-25 18:19:29,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:29,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-25 18:19:29,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:29,889 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 18:19:29,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:19:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 18:19:29,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:29,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072832244] [2022-11-25 18:19:29,991 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:19:29,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374018820] [2022-11-25 18:19:29,992 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374018820] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:19:29,992 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:19:29,992 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2022-11-25 18:19:29,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790246820] [2022-11-25 18:19:29,993 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:19:29,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-25 18:19:29,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:29,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-25 18:19:29,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-11-25 18:19:29,995 INFO L87 Difference]: Start difference. First operand 46 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 18:19:30,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:19:30,240 INFO L93 Difference]: Finished difference Result 99 states and 139 transitions. [2022-11-25 18:19:30,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-25 18:19:30,241 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2022-11-25 18:19:30,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:19:30,247 INFO L225 Difference]: With dead ends: 99 [2022-11-25 18:19:30,250 INFO L226 Difference]: Without dead ends: 92 [2022-11-25 18:19:30,251 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:19:30,256 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 61 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 18:19:30,258 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 242 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 18:19:30,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-11-25 18:19:30,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 67. [2022-11-25 18:19:30,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 47 states have internal predecessors, (58), 17 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-25 18:19:30,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 91 transitions. [2022-11-25 18:19:30,294 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 91 transitions. Word has length 35 [2022-11-25 18:19:30,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:19:30,298 INFO L495 AbstractCegarLoop]: Abstraction has 67 states and 91 transitions. [2022-11-25 18:19:30,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-25 18:19:30,299 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 91 transitions. [2022-11-25 18:19:30,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-25 18:19:30,302 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:19:30,302 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:30,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-25 18:19:30,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:30,511 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:19:30,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:30,512 INFO L85 PathProgramCache]: Analyzing trace with hash -720434099, now seen corresponding path program 1 times [2022-11-25 18:19:30,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:30,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501590620] [2022-11-25 18:19:30,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:30,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:30,527 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:19:30,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [683485343] [2022-11-25 18:19:30,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:30,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:30,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:30,529 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:30,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-25 18:19:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:30,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-25 18:19:30,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:30,736 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 18:19:30,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:19:30,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:30,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501590620] [2022-11-25 18:19:30,871 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:19:30,871 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683485343] [2022-11-25 18:19:30,871 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683485343] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:19:30,871 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:19:30,871 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2022-11-25 18:19:30,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142208520] [2022-11-25 18:19:30,872 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 18:19:30,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-25 18:19:30,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:30,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-25 18:19:30,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:19:30,873 INFO L87 Difference]: Start difference. First operand 67 states and 91 transitions. Second operand has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 18:19:30,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:19:30,997 INFO L93 Difference]: Finished difference Result 75 states and 98 transitions. [2022-11-25 18:19:30,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-25 18:19:30,997 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 38 [2022-11-25 18:19:30,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:19:31,001 INFO L225 Difference]: With dead ends: 75 [2022-11-25 18:19:31,001 INFO L226 Difference]: Without dead ends: 73 [2022-11-25 18:19:31,002 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2022-11-25 18:19:31,002 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:19:31,005 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 145 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:19:31,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-11-25 18:19:31,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2022-11-25 18:19:31,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 50 states have internal predecessors, (61), 17 states have call successors, (17), 4 states have call predecessors, (17), 4 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2022-11-25 18:19:31,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 94 transitions. [2022-11-25 18:19:31,038 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 94 transitions. Word has length 38 [2022-11-25 18:19:31,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:19:31,039 INFO L495 AbstractCegarLoop]: Abstraction has 71 states and 94 transitions. [2022-11-25 18:19:31,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.5714285714285716) internal successors, (18), 6 states have internal predecessors, (18), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2022-11-25 18:19:31,040 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 94 transitions. [2022-11-25 18:19:31,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-11-25 18:19:31,046 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:19:31,046 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:31,055 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-25 18:19:31,252 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:31,252 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:19:31,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:31,253 INFO L85 PathProgramCache]: Analyzing trace with hash -376152117, now seen corresponding path program 1 times [2022-11-25 18:19:31,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:31,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100471357] [2022-11-25 18:19:31,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:31,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:31,272 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:19:31,272 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1952820506] [2022-11-25 18:19:31,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:31,272 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:31,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:31,273 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:31,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-25 18:19:31,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:31,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-25 18:19:31,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2022-11-25 18:19:31,592 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:19:31,829 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 18:19:31,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:31,830 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100471357] [2022-11-25 18:19:31,830 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:19:31,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952820506] [2022-11-25 18:19:31,833 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952820506] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:19:31,833 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:19:31,833 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2022-11-25 18:19:31,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949844149] [2022-11-25 18:19:31,833 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:19:31,835 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-25 18:19:31,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:31,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-25 18:19:31,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2022-11-25 18:19:31,837 INFO L87 Difference]: Start difference. First operand 71 states and 94 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-25 18:19:32,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:19:32,107 INFO L93 Difference]: Finished difference Result 107 states and 143 transitions. [2022-11-25 18:19:32,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-25 18:19:32,108 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) Word has length 38 [2022-11-25 18:19:32,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:19:32,110 INFO L225 Difference]: With dead ends: 107 [2022-11-25 18:19:32,110 INFO L226 Difference]: Without dead ends: 105 [2022-11-25 18:19:32,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:19:32,111 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 43 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 259 SdHoareTripleChecker+Invalid, 247 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-25 18:19:32,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 259 Invalid, 247 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-25 18:19:32,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-11-25 18:19:32,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 101. [2022-11-25 18:19:32,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 71 states have internal predecessors, (88), 25 states have call successors, (25), 5 states have call predecessors, (25), 5 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-25 18:19:32,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 137 transitions. [2022-11-25 18:19:32,157 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 137 transitions. Word has length 38 [2022-11-25 18:19:32,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:19:32,158 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 137 transitions. [2022-11-25 18:19:32,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 1 states have call successors, (5) [2022-11-25 18:19:32,160 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 137 transitions. [2022-11-25 18:19:32,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 18:19:32,162 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:19:32,162 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:32,176 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-25 18:19:32,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:32,368 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:19:32,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:32,368 INFO L85 PathProgramCache]: Analyzing trace with hash 279172547, now seen corresponding path program 1 times [2022-11-25 18:19:32,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:32,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483625455] [2022-11-25 18:19:32,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:32,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:32,384 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:19:32,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587748343] [2022-11-25 18:19:32,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:32,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:32,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:32,386 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:32,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-25 18:19:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:32,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 22 conjunts are in the unsatisfiable core [2022-11-25 18:19:32,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:32,667 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-25 18:19:32,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:19:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2022-11-25 18:19:34,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:34,266 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483625455] [2022-11-25 18:19:34,266 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:19:34,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587748343] [2022-11-25 18:19:34,267 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587748343] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:19:34,267 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:19:34,267 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [12] total 14 [2022-11-25 18:19:34,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344904309] [2022-11-25 18:19:34,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:34,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:19:34,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:34,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:19:34,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2022-11-25 18:19:34,268 INFO L87 Difference]: Start difference. First operand 101 states and 137 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 18:19:34,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:19:34,360 INFO L93 Difference]: Finished difference Result 147 states and 209 transitions. [2022-11-25 18:19:34,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:19:34,361 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 43 [2022-11-25 18:19:34,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:19:34,363 INFO L225 Difference]: With dead ends: 147 [2022-11-25 18:19:34,363 INFO L226 Difference]: Without dead ends: 145 [2022-11-25 18:19:34,363 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2022-11-25 18:19:34,364 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 7 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 51 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 51 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:19:34,364 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 124 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 51 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:19:34,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-11-25 18:19:34,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 139. [2022-11-25 18:19:34,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 87 states have (on average 1.2873563218390804) internal successors, (112), 88 states have internal predecessors, (112), 45 states have call successors, (45), 6 states have call predecessors, (45), 6 states have return successors, (44), 44 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-25 18:19:34,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 201 transitions. [2022-11-25 18:19:34,422 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 201 transitions. Word has length 43 [2022-11-25 18:19:34,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:19:34,422 INFO L495 AbstractCegarLoop]: Abstraction has 139 states and 201 transitions. [2022-11-25 18:19:34,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2022-11-25 18:19:34,423 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 201 transitions. [2022-11-25 18:19:34,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 18:19:34,423 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:19:34,423 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:34,435 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-25 18:19:34,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:34,629 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:19:34,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:34,629 INFO L85 PathProgramCache]: Analyzing trace with hash -2141198011, now seen corresponding path program 1 times [2022-11-25 18:19:34,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:34,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760424553] [2022-11-25 18:19:34,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:34,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:34,652 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:19:34,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1337005715] [2022-11-25 18:19:34,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:34,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:34,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:34,659 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:34,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-25 18:19:34,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:34,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-25 18:19:34,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:35,156 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2022-11-25 18:19:35,156 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:19:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 18:19:35,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:35,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760424553] [2022-11-25 18:19:35,481 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:19:35,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337005715] [2022-11-25 18:19:35,481 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337005715] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:19:35,481 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:19:35,481 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 19 [2022-11-25 18:19:35,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967428076] [2022-11-25 18:19:35,481 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:19:35,482 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-11-25 18:19:35,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:35,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-11-25 18:19:35,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2022-11-25 18:19:35,483 INFO L87 Difference]: Start difference. First operand 139 states and 201 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-25 18:19:39,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:19:39,735 INFO L93 Difference]: Finished difference Result 198 states and 280 transitions. [2022-11-25 18:19:39,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-25 18:19:39,736 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) Word has length 43 [2022-11-25 18:19:39,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:19:39,739 INFO L225 Difference]: With dead ends: 198 [2022-11-25 18:19:39,739 INFO L226 Difference]: Without dead ends: 196 [2022-11-25 18:19:39,740 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=211, Invalid=911, Unknown=0, NotChecked=0, Total=1122 [2022-11-25 18:19:39,741 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 146 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 797 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-11-25 18:19:39,741 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 203 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 797 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-11-25 18:19:39,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2022-11-25 18:19:39,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 171. [2022-11-25 18:19:39,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 111 states have (on average 1.2612612612612613) internal successors, (140), 115 states have internal predecessors, (140), 51 states have call successors, (51), 8 states have call predecessors, (51), 8 states have return successors, (50), 47 states have call predecessors, (50), 50 states have call successors, (50) [2022-11-25 18:19:39,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 241 transitions. [2022-11-25 18:19:39,802 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 241 transitions. Word has length 43 [2022-11-25 18:19:39,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:19:39,803 INFO L495 AbstractCegarLoop]: Abstraction has 171 states and 241 transitions. [2022-11-25 18:19:39,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 17 states have internal predecessors, (43), 4 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 5 states have call predecessors, (10), 4 states have call successors, (10) [2022-11-25 18:19:39,803 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 241 transitions. [2022-11-25 18:19:39,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-11-25 18:19:39,804 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:19:39,804 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:39,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-25 18:19:40,011 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-25 18:19:40,011 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:19:40,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:40,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1796916029, now seen corresponding path program 2 times [2022-11-25 18:19:40,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:40,012 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262893262] [2022-11-25 18:19:40,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:40,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:40,024 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:19:40,024 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [590176473] [2022-11-25 18:19:40,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:19:40,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:40,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:40,026 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:40,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-25 18:19:40,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:19:40,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:19:40,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-25 18:19:40,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:40,135 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-25 18:19:40,135 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:19:40,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:40,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262893262] [2022-11-25 18:19:40,135 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:19:40,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590176473] [2022-11-25 18:19:40,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590176473] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:19:40,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:19:40,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:19:40,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350011539] [2022-11-25 18:19:40,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:40,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:19:40,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:40,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:19:40,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:19:40,140 INFO L87 Difference]: Start difference. First operand 171 states and 241 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 18:19:40,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:19:40,291 INFO L93 Difference]: Finished difference Result 217 states and 301 transitions. [2022-11-25 18:19:40,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:19:40,292 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 43 [2022-11-25 18:19:40,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:19:40,293 INFO L225 Difference]: With dead ends: 217 [2022-11-25 18:19:40,293 INFO L226 Difference]: Without dead ends: 136 [2022-11-25 18:19:40,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-25 18:19:40,295 INFO L413 NwaCegarLoop]: 53 mSDtfsCounter, 19 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:19:40,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 139 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-25 18:19:40,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-11-25 18:19:40,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 113. [2022-11-25 18:19:40,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 71 states have (on average 1.1830985915492958) internal successors, (84), 74 states have internal predecessors, (84), 33 states have call successors, (33), 8 states have call predecessors, (33), 8 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-25 18:19:40,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 149 transitions. [2022-11-25 18:19:40,335 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 149 transitions. Word has length 43 [2022-11-25 18:19:40,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:19:40,335 INFO L495 AbstractCegarLoop]: Abstraction has 113 states and 149 transitions. [2022-11-25 18:19:40,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2022-11-25 18:19:40,336 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 149 transitions. [2022-11-25 18:19:40,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-11-25 18:19:40,336 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:19:40,337 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:40,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-25 18:19:40,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:40,542 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:19:40,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:40,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1189241395, now seen corresponding path program 1 times [2022-11-25 18:19:40,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:40,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186144615] [2022-11-25 18:19:40,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:40,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:40,554 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:19:40,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1719418177] [2022-11-25 18:19:40,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:40,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:40,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:40,556 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:40,576 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-25 18:19:40,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:40,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-25 18:19:40,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:40,710 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:19:40,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:19:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 18:19:41,028 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:41,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186144615] [2022-11-25 18:19:41,028 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:19:41,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719418177] [2022-11-25 18:19:41,028 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719418177] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-25 18:19:41,028 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:19:41,029 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [7] total 9 [2022-11-25 18:19:41,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211113330] [2022-11-25 18:19:41,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:19:41,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:19:41,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:41,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:19:41,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-25 18:19:41,030 INFO L87 Difference]: Start difference. First operand 113 states and 149 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 18:19:41,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:19:41,122 INFO L93 Difference]: Finished difference Result 119 states and 154 transitions. [2022-11-25 18:19:41,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:19:41,123 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 48 [2022-11-25 18:19:41,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:19:41,126 INFO L225 Difference]: With dead ends: 119 [2022-11-25 18:19:41,126 INFO L226 Difference]: Without dead ends: 117 [2022-11-25 18:19:41,127 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-11-25 18:19:41,127 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 8 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:19:41,128 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 122 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:19:41,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-11-25 18:19:41,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-11-25 18:19:41,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 74 states have (on average 1.1756756756756757) internal successors, (87), 77 states have internal predecessors, (87), 33 states have call successors, (33), 9 states have call predecessors, (33), 9 states have return successors, (32), 30 states have call predecessors, (32), 32 states have call successors, (32) [2022-11-25 18:19:41,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 152 transitions. [2022-11-25 18:19:41,171 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 152 transitions. Word has length 48 [2022-11-25 18:19:41,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:19:41,171 INFO L495 AbstractCegarLoop]: Abstraction has 117 states and 152 transitions. [2022-11-25 18:19:41,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-25 18:19:41,171 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 152 transitions. [2022-11-25 18:19:41,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-11-25 18:19:41,173 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:19:41,173 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:19:41,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-25 18:19:41,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-25 18:19:41,378 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:19:41,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:19:41,379 INFO L85 PathProgramCache]: Analyzing trace with hash -828341661, now seen corresponding path program 1 times [2022-11-25 18:19:41,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:19:41,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897229175] [2022-11-25 18:19:41,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:41,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:19:41,397 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:19:41,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [689897387] [2022-11-25 18:19:41,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:19:41,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:19:41,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:19:41,401 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:19:41,422 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-25 18:19:41,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:19:41,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 65 conjunts are in the unsatisfiable core [2022-11-25 18:19:41,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:19:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2022-11-25 18:19:42,733 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:19:44,618 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2022-11-25 18:19:44,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:19:44,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897229175] [2022-11-25 18:19:44,619 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:19:44,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689897387] [2022-11-25 18:19:44,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689897387] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:19:44,620 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:19:44,620 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 27 [2022-11-25 18:19:44,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727545269] [2022-11-25 18:19:44,620 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:19:44,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-25 18:19:44,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:19:44,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-25 18:19:44,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-11-25 18:19:44,622 INFO L87 Difference]: Start difference. First operand 117 states and 152 transitions. Second operand has 27 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 9 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-25 18:20:05,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:20:05,040 INFO L93 Difference]: Finished difference Result 336 states and 470 transitions. [2022-11-25 18:20:05,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-25 18:20:05,041 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 9 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) Word has length 60 [2022-11-25 18:20:05,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:20:05,043 INFO L225 Difference]: With dead ends: 336 [2022-11-25 18:20:05,043 INFO L226 Difference]: Without dead ends: 248 [2022-11-25 18:20:05,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=448, Invalid=2204, Unknown=0, NotChecked=0, Total=2652 [2022-11-25 18:20:05,045 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 145 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 1353 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 244 SdHoareTripleChecker+Invalid, 1596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 1353 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2022-11-25 18:20:05,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 244 Invalid, 1596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 1353 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2022-11-25 18:20:05,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-11-25 18:20:05,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 195. [2022-11-25 18:20:05,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 126 states have (on average 1.1904761904761905) internal successors, (150), 128 states have internal predecessors, (150), 55 states have call successors, (55), 13 states have call predecessors, (55), 13 states have return successors, (54), 53 states have call predecessors, (54), 54 states have call successors, (54) [2022-11-25 18:20:05,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 259 transitions. [2022-11-25 18:20:05,130 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 259 transitions. Word has length 60 [2022-11-25 18:20:05,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:20:05,130 INFO L495 AbstractCegarLoop]: Abstraction has 195 states and 259 transitions. [2022-11-25 18:20:05,131 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.0) internal successors, (48), 22 states have internal predecessors, (48), 9 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 7 states have call successors, (14) [2022-11-25 18:20:05,131 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 259 transitions. [2022-11-25 18:20:05,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-11-25 18:20:05,132 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:20:05,132 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:05,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-25 18:20:05,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2022-11-25 18:20:05,334 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:20:05,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:05,335 INFO L85 PathProgramCache]: Analyzing trace with hash -1439093215, now seen corresponding path program 1 times [2022-11-25 18:20:05,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:20:05,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790475378] [2022-11-25 18:20:05,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:05,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:20:05,354 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:20:05,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [733219286] [2022-11-25 18:20:05,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:05,354 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:20:05,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:20:05,356 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:20:05,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-25 18:20:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:05,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-25 18:20:05,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:20:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2022-11-25 18:20:06,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:20:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2022-11-25 18:20:06,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:20:06,753 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790475378] [2022-11-25 18:20:06,754 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:20:06,754 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733219286] [2022-11-25 18:20:06,754 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733219286] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:20:06,754 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:20:06,754 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 8] total 23 [2022-11-25 18:20:06,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997830015] [2022-11-25 18:20:06,754 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:20:06,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 18:20:06,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:20:06,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 18:20:06,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2022-11-25 18:20:06,756 INFO L87 Difference]: Start difference. First operand 195 states and 259 transitions. Second operand has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 19 states have internal predecessors, (61), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-25 18:20:36,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:20:36,870 INFO L93 Difference]: Finished difference Result 322 states and 453 transitions. [2022-11-25 18:20:36,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-25 18:20:36,871 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 19 states have internal predecessors, (61), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 68 [2022-11-25 18:20:36,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:20:36,873 INFO L225 Difference]: With dead ends: 322 [2022-11-25 18:20:36,873 INFO L226 Difference]: Without dead ends: 320 [2022-11-25 18:20:36,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=424, Invalid=2126, Unknown=0, NotChecked=0, Total=2550 [2022-11-25 18:20:36,875 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 144 mSDsluCounter, 320 mSDsCounter, 0 mSdLazyCounter, 1489 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 1723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 1489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.2s IncrementalHoareTripleChecker+Time [2022-11-25 18:20:36,875 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 376 Invalid, 1723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 1489 Invalid, 0 Unknown, 0 Unchecked, 11.2s Time] [2022-11-25 18:20:36,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-11-25 18:20:36,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 203. [2022-11-25 18:20:36,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 132 states have (on average 1.1818181818181819) internal successors, (156), 134 states have internal predecessors, (156), 55 states have call successors, (55), 15 states have call predecessors, (55), 15 states have return successors, (54), 53 states have call predecessors, (54), 54 states have call successors, (54) [2022-11-25 18:20:36,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 265 transitions. [2022-11-25 18:20:36,959 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 265 transitions. Word has length 68 [2022-11-25 18:20:36,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:20:36,959 INFO L495 AbstractCegarLoop]: Abstraction has 203 states and 265 transitions. [2022-11-25 18:20:36,959 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.652173913043478) internal successors, (61), 19 states have internal predecessors, (61), 7 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-25 18:20:36,960 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 265 transitions. [2022-11-25 18:20:36,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 18:20:36,961 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:20:36,961 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:36,966 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-25 18:20:37,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:20:37,166 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:20:37,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:37,167 INFO L85 PathProgramCache]: Analyzing trace with hash 798002477, now seen corresponding path program 2 times [2022-11-25 18:20:37,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:20:37,167 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965651119] [2022-11-25 18:20:37,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:37,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:20:37,177 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:20:37,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [559123870] [2022-11-25 18:20:37,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:20:37,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:20:37,183 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:20:37,184 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:20:37,195 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-25 18:20:37,242 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:20:37,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:20:37,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-25 18:20:37,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:20:37,290 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 48 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2022-11-25 18:20:37,290 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-25 18:20:37,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:20:37,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965651119] [2022-11-25 18:20:37,291 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:20:37,291 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559123870] [2022-11-25 18:20:37,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559123870] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-25 18:20:37,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-25 18:20:37,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-25 18:20:37,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143215273] [2022-11-25 18:20:37,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-25 18:20:37,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-25 18:20:37,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:20:37,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-25 18:20:37,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-25 18:20:37,293 INFO L87 Difference]: Start difference. First operand 203 states and 265 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-25 18:20:37,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:20:37,495 INFO L93 Difference]: Finished difference Result 363 states and 487 transitions. [2022-11-25 18:20:37,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-25 18:20:37,495 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 73 [2022-11-25 18:20:37,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:20:37,497 INFO L225 Difference]: With dead ends: 363 [2022-11-25 18:20:37,497 INFO L226 Difference]: Without dead ends: 241 [2022-11-25 18:20:37,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-25 18:20:37,498 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 3 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:20:37,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 123 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-25 18:20:37,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-11-25 18:20:37,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 227. [2022-11-25 18:20:37,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 140 states have (on average 1.1785714285714286) internal successors, (165), 142 states have internal predecessors, (165), 71 states have call successors, (71), 15 states have call predecessors, (71), 15 states have return successors, (70), 69 states have call predecessors, (70), 70 states have call successors, (70) [2022-11-25 18:20:37,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 306 transitions. [2022-11-25 18:20:37,610 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 306 transitions. Word has length 73 [2022-11-25 18:20:37,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:20:37,611 INFO L495 AbstractCegarLoop]: Abstraction has 227 states and 306 transitions. [2022-11-25 18:20:37,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 3 states have call successors, (11), 2 states have call predecessors, (11), 2 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2022-11-25 18:20:37,611 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 306 transitions. [2022-11-25 18:20:37,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-11-25 18:20:37,612 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:20:37,612 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:37,617 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-25 18:20:37,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:20:37,815 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:20:37,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:37,815 INFO L85 PathProgramCache]: Analyzing trace with hash -1622368081, now seen corresponding path program 3 times [2022-11-25 18:20:37,815 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:20:37,815 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092292789] [2022-11-25 18:20:37,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:37,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:20:37,835 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:20:37,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1259083285] [2022-11-25 18:20:37,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:20:37,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:20:37,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:20:37,838 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:20:37,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-25 18:20:37,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-25 18:20:37,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:20:37,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 69 conjunts are in the unsatisfiable core [2022-11-25 18:20:37,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:20:38,766 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2022-11-25 18:20:38,766 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:20:38,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:20:38,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092292789] [2022-11-25 18:20:38,890 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:20:38,890 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259083285] [2022-11-25 18:20:38,890 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259083285] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-25 18:20:38,891 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-25 18:20:38,891 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2022-11-25 18:20:38,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051474078] [2022-11-25 18:20:38,891 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-25 18:20:38,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-25 18:20:38,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:20:38,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-25 18:20:38,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2022-11-25 18:20:38,893 INFO L87 Difference]: Start difference. First operand 227 states and 306 transitions. Second operand has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 18:20:39,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:20:39,986 INFO L93 Difference]: Finished difference Result 321 states and 435 transitions. [2022-11-25 18:20:39,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-11-25 18:20:39,987 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 73 [2022-11-25 18:20:39,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:20:39,989 INFO L225 Difference]: With dead ends: 321 [2022-11-25 18:20:39,989 INFO L226 Difference]: Without dead ends: 319 [2022-11-25 18:20:39,990 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2022-11-25 18:20:39,990 INFO L413 NwaCegarLoop]: 44 mSDtfsCounter, 62 mSDsluCounter, 259 mSDsCounter, 0 mSdLazyCounter, 745 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-25 18:20:39,990 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 303 Invalid, 786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 745 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-25 18:20:39,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2022-11-25 18:20:40,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 306. [2022-11-25 18:20:40,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 184 states have (on average 1.190217391304348) internal successors, (219), 185 states have internal predecessors, (219), 101 states have call successors, (101), 20 states have call predecessors, (101), 20 states have return successors, (100), 100 states have call predecessors, (100), 100 states have call successors, (100) [2022-11-25 18:20:40,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 420 transitions. [2022-11-25 18:20:40,145 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 420 transitions. Word has length 73 [2022-11-25 18:20:40,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:20:40,146 INFO L495 AbstractCegarLoop]: Abstraction has 306 states and 420 transitions. [2022-11-25 18:20:40,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.4) internal successors, (36), 14 states have internal predecessors, (36), 4 states have call successors, (10), 2 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2022-11-25 18:20:40,146 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 420 transitions. [2022-11-25 18:20:40,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-11-25 18:20:40,147 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:20:40,147 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:20:40,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2022-11-25 18:20:40,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-25 18:20:40,353 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:20:40,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:20:40,354 INFO L85 PathProgramCache]: Analyzing trace with hash 160585404, now seen corresponding path program 1 times [2022-11-25 18:20:40,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:20:40,354 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332293823] [2022-11-25 18:20:40,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:40,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:20:40,365 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:20:40,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [313514583] [2022-11-25 18:20:40,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:20:40,365 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:20:40,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:20:40,367 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:20:40,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-25 18:20:40,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:20:40,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-25 18:20:40,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:20:41,579 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 22 proven. 22 refuted. 0 times theorem prover too weak. 127 trivial. 0 not checked. [2022-11-25 18:20:41,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:20:47,212 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 16 proven. 19 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2022-11-25 18:20:47,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:20:47,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332293823] [2022-11-25 18:20:47,213 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:20:47,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313514583] [2022-11-25 18:20:47,214 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313514583] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:20:47,214 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:20:47,214 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 30 [2022-11-25 18:20:47,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34906107] [2022-11-25 18:20:47,214 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:20:47,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-25 18:20:47,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:20:47,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-25 18:20:47,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=745, Unknown=0, NotChecked=0, Total=870 [2022-11-25 18:20:47,216 INFO L87 Difference]: Start difference. First operand 306 states and 420 transitions. Second operand has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-11-25 18:21:09,771 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:21:50,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:21:50,841 INFO L93 Difference]: Finished difference Result 467 states and 649 transitions. [2022-11-25 18:21:50,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-25 18:21:50,842 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) Word has length 87 [2022-11-25 18:21:50,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:21:50,845 INFO L225 Difference]: With dead ends: 467 [2022-11-25 18:21:50,845 INFO L226 Difference]: Without dead ends: 463 [2022-11-25 18:21:50,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2491 ImplicationChecksByTransitivity, 47.6s TimeCoverageRelationStatistics Valid=1433, Invalid=7309, Unknown=0, NotChecked=0, Total=8742 [2022-11-25 18:21:50,848 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 286 mSDsluCounter, 571 mSDsCounter, 0 mSdLazyCounter, 2196 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 666 SdHoareTripleChecker+Invalid, 2734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 2196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.7s IncrementalHoareTripleChecker+Time [2022-11-25 18:21:50,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 666 Invalid, 2734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [538 Valid, 2196 Invalid, 0 Unknown, 0 Unchecked, 18.7s Time] [2022-11-25 18:21:50,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-11-25 18:21:51,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 418. [2022-11-25 18:21:51,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 243 states have (on average 1.213991769547325) internal successors, (295), 244 states have internal predecessors, (295), 149 states have call successors, (149), 25 states have call predecessors, (149), 25 states have return successors, (148), 148 states have call predecessors, (148), 148 states have call successors, (148) [2022-11-25 18:21:51,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 592 transitions. [2022-11-25 18:21:51,195 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 592 transitions. Word has length 87 [2022-11-25 18:21:51,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:21:51,195 INFO L495 AbstractCegarLoop]: Abstraction has 418 states and 592 transitions. [2022-11-25 18:21:51,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 27 states have internal predecessors, (57), 8 states have call successors, (23), 3 states have call predecessors, (23), 2 states have return successors, (22), 6 states have call predecessors, (22), 6 states have call successors, (22) [2022-11-25 18:21:51,196 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 592 transitions. [2022-11-25 18:21:51,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-25 18:21:51,197 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:21:51,197 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:21:51,203 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-25 18:21:51,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:21:51,403 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:21:51,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:21:51,403 INFO L85 PathProgramCache]: Analyzing trace with hash -275231594, now seen corresponding path program 1 times [2022-11-25 18:21:51,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:21:51,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408518742] [2022-11-25 18:21:51,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:51,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:21:51,413 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:21:51,413 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [273265610] [2022-11-25 18:21:51,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:51,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:21:51,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:21:51,417 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:21:51,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-25 18:21:51,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:21:51,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 32 conjunts are in the unsatisfiable core [2022-11-25 18:21:51,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:21:51,847 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 26 proven. 19 refuted. 0 times theorem prover too weak. 195 trivial. 0 not checked. [2022-11-25 18:21:51,847 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:21:52,521 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 22 proven. 14 refuted. 0 times theorem prover too weak. 204 trivial. 0 not checked. [2022-11-25 18:21:52,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:21:52,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408518742] [2022-11-25 18:21:52,522 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:21:52,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273265610] [2022-11-25 18:21:52,522 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273265610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:21:52,522 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:21:52,523 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 22 [2022-11-25 18:21:52,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064698336] [2022-11-25 18:21:52,523 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:21:52,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-25 18:21:52,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:21:52,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-25 18:21:52,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=373, Unknown=0, NotChecked=0, Total=462 [2022-11-25 18:21:52,525 INFO L87 Difference]: Start difference. First operand 418 states and 592 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-25 18:21:57,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:21:57,421 INFO L93 Difference]: Finished difference Result 974 states and 1522 transitions. [2022-11-25 18:21:57,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-11-25 18:21:57,423 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 90 [2022-11-25 18:21:57,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:21:57,429 INFO L225 Difference]: With dead ends: 974 [2022-11-25 18:21:57,429 INFO L226 Difference]: Without dead ends: 972 [2022-11-25 18:21:57,430 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=657, Invalid=2313, Unknown=0, NotChecked=0, Total=2970 [2022-11-25 18:21:57,431 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 173 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 1412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:21:57,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [177 Valid, 750 Invalid, 1412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 1128 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-11-25 18:21:57,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2022-11-25 18:21:58,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 794. [2022-11-25 18:21:58,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 404 states have (on average 1.2920792079207921) internal successors, (522), 405 states have internal predecessors, (522), 361 states have call successors, (361), 28 states have call predecessors, (361), 28 states have return successors, (360), 360 states have call predecessors, (360), 360 states have call successors, (360) [2022-11-25 18:21:58,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1243 transitions. [2022-11-25 18:21:58,455 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1243 transitions. Word has length 90 [2022-11-25 18:21:58,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:21:58,456 INFO L495 AbstractCegarLoop]: Abstraction has 794 states and 1243 transitions. [2022-11-25 18:21:58,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 19 states have internal predecessors, (43), 8 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2022-11-25 18:21:58,456 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1243 transitions. [2022-11-25 18:21:58,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-25 18:21:58,458 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:21:58,458 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:21:58,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-25 18:21:58,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-25 18:21:58,667 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:21:58,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:21:58,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1599365144, now seen corresponding path program 1 times [2022-11-25 18:21:58,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:21:58,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703604806] [2022-11-25 18:21:58,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:58,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:21:58,677 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:21:58,677 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [793757402] [2022-11-25 18:21:58,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:21:58,678 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:21:58,678 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:21:58,679 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:21:58,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-25 18:21:58,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-25 18:21:58,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 49 conjunts are in the unsatisfiable core [2022-11-25 18:21:58,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:21:59,578 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 24 proven. 23 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2022-11-25 18:21:59,579 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:22:00,946 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 18 proven. 20 refuted. 0 times theorem prover too weak. 168 trivial. 0 not checked. [2022-11-25 18:22:00,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:22:00,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703604806] [2022-11-25 18:22:00,946 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:22:00,946 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793757402] [2022-11-25 18:22:00,946 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793757402] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:22:00,946 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:22:00,946 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11] total 23 [2022-11-25 18:22:00,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953913241] [2022-11-25 18:22:00,947 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:22:00,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-11-25 18:22:00,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:22:00,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-11-25 18:22:00,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2022-11-25 18:22:00,948 INFO L87 Difference]: Start difference. First operand 794 states and 1243 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 20 states have internal predecessors, (53), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-11-25 18:22:37,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:22:46,292 WARN L233 SmtUtils]: Spent 7.15s on a formula simplification that was a NOOP. DAG size: 73 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:22:58,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:22:58,249 INFO L93 Difference]: Finished difference Result 1082 states and 1695 transitions. [2022-11-25 18:22:58,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-11-25 18:22:58,250 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 20 states have internal predecessors, (53), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) Word has length 90 [2022-11-25 18:22:58,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:22:58,257 INFO L225 Difference]: With dead ends: 1082 [2022-11-25 18:22:58,257 INFO L226 Difference]: Without dead ends: 1080 [2022-11-25 18:22:58,259 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 984 ImplicationChecksByTransitivity, 32.9s TimeCoverageRelationStatistics Valid=815, Invalid=3217, Unknown=0, NotChecked=0, Total=4032 [2022-11-25 18:22:58,259 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 203 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 1601 mSolverCounterSat, 388 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 592 SdHoareTripleChecker+Invalid, 1990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 1601 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.2s IncrementalHoareTripleChecker+Time [2022-11-25 18:22:58,260 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 592 Invalid, 1990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 1601 Invalid, 1 Unknown, 0 Unchecked, 24.2s Time] [2022-11-25 18:22:58,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-11-25 18:22:59,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 994. [2022-11-25 18:22:59,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 994 states, 508 states have (on average 1.2992125984251968) internal successors, (660), 509 states have internal predecessors, (660), 453 states have call successors, (453), 32 states have call predecessors, (453), 32 states have return successors, (452), 452 states have call predecessors, (452), 452 states have call successors, (452) [2022-11-25 18:22:59,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 994 states to 994 states and 1565 transitions. [2022-11-25 18:22:59,519 INFO L78 Accepts]: Start accepts. Automaton has 994 states and 1565 transitions. Word has length 90 [2022-11-25 18:22:59,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:22:59,519 INFO L495 AbstractCegarLoop]: Abstraction has 994 states and 1565 transitions. [2022-11-25 18:22:59,520 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 20 states have internal predecessors, (53), 8 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (24), 8 states have call predecessors, (24), 8 states have call successors, (24) [2022-11-25 18:22:59,520 INFO L276 IsEmpty]: Start isEmpty. Operand 994 states and 1565 transitions. [2022-11-25 18:22:59,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-11-25 18:22:59,522 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:22:59,523 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:22:59,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-25 18:22:59,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-25 18:22:59,735 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:22:59,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:22:59,735 INFO L85 PathProgramCache]: Analyzing trace with hash -577787487, now seen corresponding path program 4 times [2022-11-25 18:22:59,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:22:59,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569916464] [2022-11-25 18:22:59,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:22:59,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:22:59,746 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:22:59,746 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1525039457] [2022-11-25 18:22:59,746 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:22:59,746 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:22:59,747 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:22:59,748 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:22:59,755 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-25 18:22:59,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:22:59,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:22:59,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-25 18:22:59,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:23:01,476 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 44 proven. 50 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2022-11-25 18:23:01,476 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:23:08,242 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 41 proven. 41 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2022-11-25 18:23:08,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:23:08,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569916464] [2022-11-25 18:23:08,242 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:23:08,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525039457] [2022-11-25 18:23:08,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525039457] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:23:08,243 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:23:08,243 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 17] total 36 [2022-11-25 18:23:08,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902981746] [2022-11-25 18:23:08,243 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:23:08,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-11-25 18:23:08,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:23:08,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-11-25 18:23:08,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=1069, Unknown=0, NotChecked=0, Total=1260 [2022-11-25 18:23:08,245 INFO L87 Difference]: Start difference. First operand 994 states and 1565 transitions. Second operand has 36 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 32 states have internal predecessors, (75), 11 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-11-25 18:23:37,288 WARN L233 SmtUtils]: Spent 7.64s on a formula simplification. DAG size of input: 78 DAG size of output: 74 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:24:03,162 WARN L233 SmtUtils]: Spent 7.21s on a formula simplification. DAG size of input: 77 DAG size of output: 62 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:24:12,266 WARN L233 SmtUtils]: Spent 6.31s on a formula simplification. DAG size of input: 78 DAG size of output: 66 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:24:28,227 WARN L233 SmtUtils]: Spent 7.72s on a formula simplification. DAG size of input: 75 DAG size of output: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:24:35,550 WARN L233 SmtUtils]: Spent 5.07s on a formula simplification. DAG size of input: 74 DAG size of output: 71 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:24:52,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:24:52,976 INFO L93 Difference]: Finished difference Result 1195 states and 1858 transitions. [2022-11-25 18:24:52,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-11-25 18:24:52,977 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 32 states have internal predecessors, (75), 11 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 98 [2022-11-25 18:24:52,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:24:52,983 INFO L225 Difference]: With dead ends: 1195 [2022-11-25 18:24:52,983 INFO L226 Difference]: Without dead ends: 1193 [2022-11-25 18:24:52,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 80.5s TimeCoverageRelationStatistics Valid=1104, Invalid=4748, Unknown=0, NotChecked=0, Total=5852 [2022-11-25 18:24:52,986 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 387 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 1986 mSolverCounterSat, 619 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 2605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 619 IncrementalHoareTripleChecker+Valid, 1986 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 26.1s IncrementalHoareTripleChecker+Time [2022-11-25 18:24:52,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 406 Invalid, 2605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [619 Valid, 1986 Invalid, 0 Unknown, 0 Unchecked, 26.1s Time] [2022-11-25 18:24:52,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1193 states. [2022-11-25 18:24:54,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1193 to 1130. [2022-11-25 18:24:54,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 589 states have (on average 1.2869269949066213) internal successors, (758), 591 states have internal predecessors, (758), 503 states have call successors, (503), 37 states have call predecessors, (503), 37 states have return successors, (502), 501 states have call predecessors, (502), 502 states have call successors, (502) [2022-11-25 18:24:54,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 1763 transitions. [2022-11-25 18:24:54,408 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 1763 transitions. Word has length 98 [2022-11-25 18:24:54,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:24:54,409 INFO L495 AbstractCegarLoop]: Abstraction has 1130 states and 1763 transitions. [2022-11-25 18:24:54,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.2058823529411766) internal successors, (75), 32 states have internal predecessors, (75), 11 states have call successors, (27), 3 states have call predecessors, (27), 3 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-11-25 18:24:54,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 1763 transitions. [2022-11-25 18:24:54,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-11-25 18:24:54,412 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:24:54,412 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:24:54,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-25 18:24:54,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-25 18:24:54,618 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:24:54,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:24:54,618 INFO L85 PathProgramCache]: Analyzing trace with hash 2024025072, now seen corresponding path program 2 times [2022-11-25 18:24:54,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:24:54,619 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40448681] [2022-11-25 18:24:54,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:24:54,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:24:54,629 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:24:54,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [529651258] [2022-11-25 18:24:54,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:24:54,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:24:54,630 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:24:54,631 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:24:54,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-25 18:24:54,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:24:54,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:24:54,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 67 conjunts are in the unsatisfiable core [2022-11-25 18:24:54,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:24:55,808 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 30 proven. 30 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-11-25 18:24:55,808 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:24:59,621 INFO L134 CoverageAnalysis]: Checked inductivity of 339 backedges. 24 proven. 27 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-11-25 18:24:59,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:24:59,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40448681] [2022-11-25 18:24:59,621 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:24:59,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529651258] [2022-11-25 18:24:59,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529651258] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:24:59,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:24:59,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 29 [2022-11-25 18:24:59,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707662497] [2022-11-25 18:24:59,622 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:24:59,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-25 18:24:59,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:24:59,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-25 18:24:59,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2022-11-25 18:24:59,624 INFO L87 Difference]: Start difference. First operand 1130 states and 1763 transitions. Second operand has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2022-11-25 18:25:10,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:25:43,029 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.49s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:26:13,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:26:13,649 INFO L93 Difference]: Finished difference Result 1839 states and 2861 transitions. [2022-11-25 18:26:13,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-11-25 18:26:13,650 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) Word has length 107 [2022-11-25 18:26:13,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:26:13,658 INFO L225 Difference]: With dead ends: 1839 [2022-11-25 18:26:13,659 INFO L226 Difference]: Without dead ends: 1393 [2022-11-25 18:26:13,664 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2823 ImplicationChecksByTransitivity, 54.5s TimeCoverageRelationStatistics Valid=1737, Invalid=7769, Unknown=0, NotChecked=0, Total=9506 [2022-11-25 18:26:13,665 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 326 mSDsluCounter, 579 mSDsCounter, 0 mSdLazyCounter, 2159 mSolverCounterSat, 662 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 19.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 2822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 2159 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.0s IncrementalHoareTripleChecker+Time [2022-11-25 18:26:13,665 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [334 Valid, 687 Invalid, 2822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 2159 Invalid, 1 Unknown, 0 Unchecked, 20.0s Time] [2022-11-25 18:26:13,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2022-11-25 18:26:15,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1217. [2022-11-25 18:26:15,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 632 states have (on average 1.2832278481012658) internal successors, (811), 634 states have internal predecessors, (811), 543 states have call successors, (543), 41 states have call predecessors, (543), 41 states have return successors, (542), 541 states have call predecessors, (542), 542 states have call successors, (542) [2022-11-25 18:26:15,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1896 transitions. [2022-11-25 18:26:15,400 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1896 transitions. Word has length 107 [2022-11-25 18:26:15,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:26:15,400 INFO L495 AbstractCegarLoop]: Abstraction has 1217 states and 1896 transitions. [2022-11-25 18:26:15,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.111111111111111) internal successors, (57), 26 states have internal predecessors, (57), 10 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (30), 8 states have call predecessors, (30), 8 states have call successors, (30) [2022-11-25 18:26:15,401 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1896 transitions. [2022-11-25 18:26:15,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-11-25 18:26:15,403 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:26:15,404 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:26:15,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-25 18:26:15,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:26:15,610 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:26:15,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:26:15,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1666306094, now seen corresponding path program 3 times [2022-11-25 18:26:15,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:26:15,611 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423646235] [2022-11-25 18:26:15,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:26:15,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:26:15,632 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:26:15,633 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1694514610] [2022-11-25 18:26:15,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:26:15,634 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:26:15,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:26:15,635 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:26:15,662 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-25 18:26:15,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-25 18:26:15,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:26:15,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-25 18:26:15,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:26:17,102 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 47 refuted. 0 times theorem prover too weak. 279 trivial. 0 not checked. [2022-11-25 18:26:17,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:26:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 24 proven. 38 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-11-25 18:26:21,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:26:21,938 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423646235] [2022-11-25 18:26:21,938 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:26:21,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694514610] [2022-11-25 18:26:21,939 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694514610] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:26:21,939 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:26:21,939 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2022-11-25 18:26:21,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933217542] [2022-11-25 18:26:21,939 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:26:21,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-11-25 18:26:21,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:26:21,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-11-25 18:26:21,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2022-11-25 18:26:21,941 INFO L87 Difference]: Start difference. First operand 1217 states and 1896 transitions. Second operand has 31 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2022-11-25 18:26:31,790 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:26:39,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:26:53,441 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:26:56,291 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:27:07,387 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:27:10,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:27:15,283 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.45s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:27:20,015 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:27:24,967 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.84s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:27:29,455 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:27:43,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:27:43,696 INFO L93 Difference]: Finished difference Result 1754 states and 2756 transitions. [2022-11-25 18:27:43,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-11-25 18:27:43,696 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) Word has length 112 [2022-11-25 18:27:43,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:27:43,703 INFO L225 Difference]: With dead ends: 1754 [2022-11-25 18:27:43,704 INFO L226 Difference]: Without dead ends: 1745 [2022-11-25 18:27:43,707 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 193 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3116 ImplicationChecksByTransitivity, 32.6s TimeCoverageRelationStatistics Valid=1818, Invalid=9524, Unknown=0, NotChecked=0, Total=11342 [2022-11-25 18:27:43,708 INFO L413 NwaCegarLoop]: 128 mSDtfsCounter, 419 mSDsluCounter, 844 mSDsCounter, 0 mSdLazyCounter, 3517 mSolverCounterSat, 616 mSolverCounterUnsat, 8 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 50.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 4141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 3517 IncrementalHoareTripleChecker+Invalid, 8 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 50.9s IncrementalHoareTripleChecker+Time [2022-11-25 18:27:43,708 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [431 Valid, 972 Invalid, 4141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [616 Valid, 3517 Invalid, 8 Unknown, 0 Unchecked, 50.9s Time] [2022-11-25 18:27:43,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1745 states. [2022-11-25 18:27:45,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1745 to 1371. [2022-11-25 18:27:45,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1371 states, 717 states have (on average 1.2817294281729428) internal successors, (919), 719 states have internal predecessors, (919), 607 states have call successors, (607), 46 states have call predecessors, (607), 46 states have return successors, (606), 605 states have call predecessors, (606), 606 states have call successors, (606) [2022-11-25 18:27:45,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1371 states to 1371 states and 2132 transitions. [2022-11-25 18:27:45,607 INFO L78 Accepts]: Start accepts. Automaton has 1371 states and 2132 transitions. Word has length 112 [2022-11-25 18:27:45,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:27:45,608 INFO L495 AbstractCegarLoop]: Abstraction has 1371 states and 2132 transitions. [2022-11-25 18:27:45,608 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 29 states have internal predecessors, (68), 10 states have call successors, (33), 3 states have call predecessors, (33), 2 states have return successors, (32), 8 states have call predecessors, (32), 8 states have call successors, (32) [2022-11-25 18:27:45,608 INFO L276 IsEmpty]: Start isEmpty. Operand 1371 states and 2132 transitions. [2022-11-25 18:27:45,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-11-25 18:27:45,611 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:27:45,611 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:27:45,616 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-25 18:27:45,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2022-11-25 18:27:45,812 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:27:45,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:27:45,812 INFO L85 PathProgramCache]: Analyzing trace with hash -1454845263, now seen corresponding path program 2 times [2022-11-25 18:27:45,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:27:45,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112151368] [2022-11-25 18:27:45,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:27:45,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:27:45,832 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:27:45,832 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [753279131] [2022-11-25 18:27:45,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-25 18:27:45,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:27:45,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:27:45,834 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:27:45,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-25 18:27:45,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-25 18:27:45,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:27:45,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 85 conjunts are in the unsatisfiable core [2022-11-25 18:27:45,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:27:47,450 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 32 proven. 52 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2022-11-25 18:27:47,450 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:27:51,206 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 26 proven. 46 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2022-11-25 18:27:51,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:27:51,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112151368] [2022-11-25 18:27:51,207 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:27:51,207 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753279131] [2022-11-25 18:27:51,207 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753279131] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:27:51,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:27:51,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15] total 32 [2022-11-25 18:27:51,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428548495] [2022-11-25 18:27:51,207 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:27:51,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-11-25 18:27:51,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:27:51,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-11-25 18:27:51,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=822, Unknown=0, NotChecked=0, Total=992 [2022-11-25 18:27:51,210 INFO L87 Difference]: Start difference. First operand 1371 states and 2132 transitions. Second operand has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 28 states have internal predecessors, (67), 11 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (33), 11 states have call predecessors, (33), 11 states have call successors, (33) [2022-11-25 18:28:05,214 WARN L233 SmtUtils]: Spent 5.31s on a formula simplification. DAG size of input: 91 DAG size of output: 80 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:28:18,414 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:28:35,115 WARN L233 SmtUtils]: Spent 5.13s on a formula simplification. DAG size of input: 86 DAG size of output: 75 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:29:23,176 WARN L233 SmtUtils]: Spent 8.98s on a formula simplification. DAG size of input: 111 DAG size of output: 100 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:29:26,438 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:29:47,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:29:47,034 INFO L93 Difference]: Finished difference Result 1760 states and 2728 transitions. [2022-11-25 18:29:47,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-25 18:29:47,035 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 28 states have internal predecessors, (67), 11 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (33), 11 states have call predecessors, (33), 11 states have call successors, (33) Word has length 117 [2022-11-25 18:29:47,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:29:47,044 INFO L225 Difference]: With dead ends: 1760 [2022-11-25 18:29:47,044 INFO L226 Difference]: Without dead ends: 1758 [2022-11-25 18:29:47,047 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2044 ImplicationChecksByTransitivity, 86.5s TimeCoverageRelationStatistics Valid=1712, Invalid=5944, Unknown=0, NotChecked=0, Total=7656 [2022-11-25 18:29:47,047 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 402 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 2328 mSolverCounterSat, 722 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 699 SdHoareTripleChecker+Invalid, 3052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 722 IncrementalHoareTripleChecker+Valid, 2328 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.3s IncrementalHoareTripleChecker+Time [2022-11-25 18:29:47,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [402 Valid, 699 Invalid, 3052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [722 Valid, 2328 Invalid, 2 Unknown, 0 Unchecked, 28.3s Time] [2022-11-25 18:29:47,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2022-11-25 18:29:50,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1710. [2022-11-25 18:29:50,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1710 states, 893 states have (on average 1.2889137737961927) internal successors, (1151), 895 states have internal predecessors, (1151), 763 states have call successors, (763), 53 states have call predecessors, (763), 53 states have return successors, (762), 761 states have call predecessors, (762), 762 states have call successors, (762) [2022-11-25 18:29:50,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1710 states to 1710 states and 2676 transitions. [2022-11-25 18:29:50,076 INFO L78 Accepts]: Start accepts. Automaton has 1710 states and 2676 transitions. Word has length 117 [2022-11-25 18:29:50,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:29:50,076 INFO L495 AbstractCegarLoop]: Abstraction has 1710 states and 2676 transitions. [2022-11-25 18:29:50,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.161290322580645) internal successors, (67), 28 states have internal predecessors, (67), 11 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (33), 11 states have call predecessors, (33), 11 states have call successors, (33) [2022-11-25 18:29:50,077 INFO L276 IsEmpty]: Start isEmpty. Operand 1710 states and 2676 transitions. [2022-11-25 18:29:50,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-25 18:29:50,080 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:29:50,080 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:29:50,085 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-25 18:29:50,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:50,281 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:29:50,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:29:50,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1948772218, now seen corresponding path program 3 times [2022-11-25 18:29:50,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:29:50,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427081477] [2022-11-25 18:29:50,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:29:50,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:29:50,292 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:29:50,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028804784] [2022-11-25 18:29:50,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-25 18:29:50,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:29:50,292 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:29:50,293 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:29:50,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-25 18:29:50,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2022-11-25 18:29:50,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:29:50,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 106 conjunts are in the unsatisfiable core [2022-11-25 18:29:50,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:29:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 90 proven. 84 refuted. 0 times theorem prover too weak. 261 trivial. 0 not checked. [2022-11-25 18:29:53,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:29:59,298 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 123 proven. 29 refuted. 0 times theorem prover too weak. 283 trivial. 0 not checked. [2022-11-25 18:29:59,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:29:59,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427081477] [2022-11-25 18:29:59,299 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:29:59,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028804784] [2022-11-25 18:29:59,299 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028804784] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:29:59,299 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:29:59,299 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14] total 38 [2022-11-25 18:29:59,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457568286] [2022-11-25 18:29:59,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:29:59,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-11-25 18:29:59,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:29:59,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-11-25 18:29:59,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1225, Unknown=0, NotChecked=0, Total=1406 [2022-11-25 18:29:59,301 INFO L87 Difference]: Start difference. First operand 1710 states and 2676 transitions. Second operand has 38 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 32 states have internal predecessors, (81), 14 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) [2022-11-25 18:30:25,326 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:30:43,480 WARN L233 SmtUtils]: Spent 13.55s on a formula simplification. DAG size of input: 79 DAG size of output: 78 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-25 18:30:58,606 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:32:05,739 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:32:14,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:32:14,749 INFO L93 Difference]: Finished difference Result 1920 states and 2967 transitions. [2022-11-25 18:32:14,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-11-25 18:32:14,750 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 32 states have internal predecessors, (81), 14 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) Word has length 125 [2022-11-25 18:32:14,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:32:14,758 INFO L225 Difference]: With dead ends: 1920 [2022-11-25 18:32:14,758 INFO L226 Difference]: Without dead ends: 1918 [2022-11-25 18:32:14,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3266 ImplicationChecksByTransitivity, 99.0s TimeCoverageRelationStatistics Valid=1843, Invalid=10147, Unknown=0, NotChecked=0, Total=11990 [2022-11-25 18:32:14,763 INFO L413 NwaCegarLoop]: 68 mSDtfsCounter, 290 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 3425 mSolverCounterSat, 524 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 614 SdHoareTripleChecker+Invalid, 3950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 524 IncrementalHoareTripleChecker+Valid, 3425 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 38.4s IncrementalHoareTripleChecker+Time [2022-11-25 18:32:14,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 614 Invalid, 3950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [524 Valid, 3425 Invalid, 1 Unknown, 0 Unchecked, 38.4s Time] [2022-11-25 18:32:14,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1918 states. [2022-11-25 18:32:17,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1918 to 1892. [2022-11-25 18:32:17,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1892 states, 1004 states have (on average 1.2808764940239044) internal successors, (1286), 1010 states have internal predecessors, (1286), 827 states have call successors, (827), 60 states have call predecessors, (827), 60 states have return successors, (826), 821 states have call predecessors, (826), 826 states have call successors, (826) [2022-11-25 18:32:17,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1892 states to 1892 states and 2939 transitions. [2022-11-25 18:32:17,926 INFO L78 Accepts]: Start accepts. Automaton has 1892 states and 2939 transitions. Word has length 125 [2022-11-25 18:32:17,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:32:17,927 INFO L495 AbstractCegarLoop]: Abstraction has 1892 states and 2939 transitions. [2022-11-25 18:32:17,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 32 states have internal predecessors, (81), 14 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (33), 11 states have call predecessors, (33), 12 states have call successors, (33) [2022-11-25 18:32:17,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1892 states and 2939 transitions. [2022-11-25 18:32:17,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-11-25 18:32:17,929 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:32:17,929 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:32:17,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-25 18:32:18,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:32:18,130 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:32:18,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:32:18,130 INFO L85 PathProgramCache]: Analyzing trace with hash 165180218, now seen corresponding path program 4 times [2022-11-25 18:32:18,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:32:18,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338844611] [2022-11-25 18:32:18,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:32:18,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:32:18,139 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:32:18,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1540154654] [2022-11-25 18:32:18,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:32:18,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:32:18,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:32:18,142 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:32:18,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-25 18:32:18,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:32:18,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:32:18,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 104 conjunts are in the unsatisfiable core [2022-11-25 18:32:18,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:32:20,487 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 58 proven. 89 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2022-11-25 18:32:20,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:32:38,343 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 75 proven. 60 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2022-11-25 18:32:38,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:32:38,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338844611] [2022-11-25 18:32:38,344 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:32:38,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540154654] [2022-11-25 18:32:38,344 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540154654] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:32:38,344 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:32:38,344 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 20] total 42 [2022-11-25 18:32:38,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130623525] [2022-11-25 18:32:38,344 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:32:38,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-25 18:32:38,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:32:38,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-25 18:32:38,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1422, Unknown=0, NotChecked=0, Total=1722 [2022-11-25 18:32:38,346 INFO L87 Difference]: Start difference. First operand 1892 states and 2939 transitions. Second operand has 42 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 37 states have internal predecessors, (88), 13 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (33), 13 states have call predecessors, (33), 13 states have call successors, (33) [2022-11-25 18:33:14,404 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:33:23,880 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.91s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:33:37,449 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:33:44,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:33:46,906 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-25 18:33:49,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-25 18:33:49,991 INFO L93 Difference]: Finished difference Result 2123 states and 3227 transitions. [2022-11-25 18:33:49,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-11-25 18:33:49,992 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 37 states have internal predecessors, (88), 13 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (33), 13 states have call predecessors, (33), 13 states have call successors, (33) Word has length 125 [2022-11-25 18:33:49,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-25 18:33:50,001 INFO L225 Difference]: With dead ends: 2123 [2022-11-25 18:33:50,001 INFO L226 Difference]: Without dead ends: 2121 [2022-11-25 18:33:50,003 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1275 ImplicationChecksByTransitivity, 33.3s TimeCoverageRelationStatistics Valid=1092, Invalid=4457, Unknown=1, NotChecked=0, Total=5550 [2022-11-25 18:33:50,004 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 286 mSDsluCounter, 538 mSDsCounter, 0 mSdLazyCounter, 3140 mSolverCounterSat, 537 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 594 SdHoareTripleChecker+Invalid, 3681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 537 IncrementalHoareTripleChecker+Valid, 3140 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.5s IncrementalHoareTripleChecker+Time [2022-11-25 18:33:50,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [286 Valid, 594 Invalid, 3681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [537 Valid, 3140 Invalid, 4 Unknown, 0 Unchecked, 40.5s Time] [2022-11-25 18:33:50,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2022-11-25 18:33:53,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 1980. [2022-11-25 18:33:53,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1073 states have (on average 1.2628145386766076) internal successors, (1355), 1084 states have internal predecessors, (1355), 837 states have call successors, (837), 69 states have call predecessors, (837), 69 states have return successors, (836), 826 states have call predecessors, (836), 836 states have call successors, (836) [2022-11-25 18:33:53,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 3028 transitions. [2022-11-25 18:33:53,848 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 3028 transitions. Word has length 125 [2022-11-25 18:33:53,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-25 18:33:53,848 INFO L495 AbstractCegarLoop]: Abstraction has 1980 states and 3028 transitions. [2022-11-25 18:33:53,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 37 states have internal predecessors, (88), 13 states have call successors, (34), 3 states have call predecessors, (34), 3 states have return successors, (33), 13 states have call predecessors, (33), 13 states have call successors, (33) [2022-11-25 18:33:53,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 3028 transitions. [2022-11-25 18:33:53,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-11-25 18:33:53,853 INFO L187 NwaCegarLoop]: Found error trace [2022-11-25 18:33:53,853 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-25 18:33:53,864 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-25 18:33:54,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:33:54,059 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-25 18:33:54,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-25 18:33:54,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1192369783, now seen corresponding path program 4 times [2022-11-25 18:33:54,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-25 18:33:54,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668313335] [2022-11-25 18:33:54,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-25 18:33:54,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-25 18:33:54,069 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-25 18:33:54,069 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [694833080] [2022-11-25 18:33:54,070 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-25 18:33:54,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-25 18:33:54,070 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 [2022-11-25 18:33:54,071 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-25 18:33:54,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1cbb7a4f-c082-4684-8b6e-fc3c1f29694f/bin/uautomizer-ZsLfNo2U6R/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-25 18:33:54,169 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-25 18:33:54,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-25 18:33:54,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 286 conjuncts, 97 conjunts are in the unsatisfiable core [2022-11-25 18:33:54,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-25 18:33:56,370 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 40 proven. 105 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2022-11-25 18:33:56,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-25 18:34:06,953 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 34 proven. 99 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2022-11-25 18:34:06,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-25 18:34:06,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668313335] [2022-11-25 18:34:06,953 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-25 18:34:06,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694833080] [2022-11-25 18:34:06,954 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694833080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-25 18:34:06,954 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-25 18:34:06,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 19] total 39 [2022-11-25 18:34:06,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401246138] [2022-11-25 18:34:06,954 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-25 18:34:06,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-11-25 18:34:06,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-25 18:34:06,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-11-25 18:34:06,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=1253, Unknown=0, NotChecked=0, Total=1482 [2022-11-25 18:34:06,956 INFO L87 Difference]: Start difference. First operand 1980 states and 3028 transitions. Second operand has 39 states, 36 states have (on average 2.111111111111111) internal successors, (76), 35 states have internal predecessors, (76), 14 states have call successors, (40), 3 states have call predecessors, (40), 3 states have return successors, (39), 12 states have call predecessors, (39), 12 states have call successors, (39)