./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/config/AutomizerReach.xml -i ../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS --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 83ea03e3a970ed9a04e84a7095cded72c8faa028a8061c6de69ab7c540d420f5 --- 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-4e7fbc6 [2022-11-23 03:35:26,157 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 03:35:26,160 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 03:35:26,203 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 03:35:26,204 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 03:35:26,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 03:35:26,210 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 03:35:26,213 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 03:35:26,215 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 03:35:26,220 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 03:35:26,221 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 03:35:26,222 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 03:35:26,222 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 03:35:26,226 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 03:35:26,228 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 03:35:26,230 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 03:35:26,231 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 03:35:26,232 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 03:35:26,233 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 03:35:26,238 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 03:35:26,240 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 03:35:26,242 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 03:35:26,244 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 03:35:26,245 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 03:35:26,252 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 03:35:26,253 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 03:35:26,253 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 03:35:26,255 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 03:35:26,256 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 03:35:26,258 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 03:35:26,258 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 03:35:26,259 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 03:35:26,261 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 03:35:26,262 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 03:35:26,264 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 03:35:26,265 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 03:35:26,266 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 03:35:26,266 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 03:35:26,266 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 03:35:26,268 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 03:35:26,278 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 03:35:26,279 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-23 03:35:26,325 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 03:35:26,326 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 03:35:26,326 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 03:35:26,327 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 03:35:26,328 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 03:35:26,328 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 03:35:26,328 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-23 03:35:26,329 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-23 03:35:26,329 INFO L138 SettingsManager]: * Use SBE=true [2022-11-23 03:35:26,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 03:35:26,330 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 03:35:26,331 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 03:35:26,331 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 03:35:26,331 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 03:35:26,331 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 03:35:26,331 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 03:35:26,332 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 03:35:26,332 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 03:35:26,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 03:35:26,332 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 03:35:26,332 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 03:35:26,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 03:35:26,333 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-23 03:35:26,333 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 03:35:26,333 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:35:26,333 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 03:35:26,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 03:35:26,334 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 03:35:26,335 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-23 03:35:26,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 03:35:26,335 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-23 03:35:26,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 03:35:26,336 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-11-23 03:35:26,336 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-11-23 03:35:26,336 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_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83ea03e3a970ed9a04e84a7095cded72c8faa028a8061c6de69ab7c540d420f5 [2022-11-23 03:35:26,615 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 03:35:26,675 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 03:35:26,678 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 03:35:26,679 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 03:35:26,690 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 03:35:26,692 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/../../sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c [2022-11-23 03:35:29,703 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 03:35:29,897 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 03:35:29,897 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c [2022-11-23 03:35:29,904 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/data/7d08d4c98/42b9211e4dbd45e185876fe025747b89/FLAGe4c0eae85 [2022-11-23 03:35:29,929 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/data/7d08d4c98/42b9211e4dbd45e185876fe025747b89 [2022-11-23 03:35:29,932 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 03:35:29,935 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 03:35:29,937 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 03:35:29,938 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 03:35:29,942 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 03:35:29,943 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:35:29" (1/1) ... [2022-11-23 03:35:29,944 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1435826a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:29, skipping insertion in model container [2022-11-23 03:35:29,945 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:35:29" (1/1) ... [2022-11-23 03:35:29,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 03:35:29,980 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 03:35:30,176 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_562e5de4-ab9e-4458-a3cb-36ff2375ee08/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c[526,539] [2022-11-23 03:35:30,198 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:35:30,212 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 03:35:30,225 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_562e5de4-ab9e-4458-a3cb-36ff2375ee08/sv-benchmarks/c/nla-digbench-scaling/hard2_unwindbound100.c[526,539] [2022-11-23 03:35:30,232 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 03:35:30,247 INFO L208 MainTranslator]: Completed translation [2022-11-23 03:35:30,247 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:30 WrapperNode [2022-11-23 03:35:30,248 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 03:35:30,249 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 03:35:30,249 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 03:35:30,249 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 03:35:30,257 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:30" (1/1) ... [2022-11-23 03:35:30,263 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:30" (1/1) ... [2022-11-23 03:35:30,290 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 69 [2022-11-23 03:35:30,291 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 03:35:30,291 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 03:35:30,292 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 03:35:30,292 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 03:35:30,301 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:30" (1/1) ... [2022-11-23 03:35:30,302 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:30" (1/1) ... [2022-11-23 03:35:30,310 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:30" (1/1) ... [2022-11-23 03:35:30,310 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:30" (1/1) ... [2022-11-23 03:35:30,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:30" (1/1) ... [2022-11-23 03:35:30,322 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:30" (1/1) ... [2022-11-23 03:35:30,323 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:30" (1/1) ... [2022-11-23 03:35:30,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:30" (1/1) ... [2022-11-23 03:35:30,326 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 03:35:30,327 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 03:35:30,327 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 03:35:30,327 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 03:35:30,328 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:30" (1/1) ... [2022-11-23 03:35:30,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 03:35:30,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:35:30,364 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 03:35:30,371 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 03:35:30,411 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 03:35:30,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 03:35:30,412 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 03:35:30,412 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 03:35:30,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-11-23 03:35:30,413 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-11-23 03:35:30,489 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 03:35:30,491 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 03:35:30,734 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 03:35:30,743 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 03:35:30,743 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-23 03:35:30,745 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:35:30 BoogieIcfgContainer [2022-11-23 03:35:30,746 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 03:35:30,748 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 03:35:30,763 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 03:35:30,792 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 03:35:30,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:35:29" (1/3) ... [2022-11-23 03:35:30,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33029567 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:35:30, skipping insertion in model container [2022-11-23 03:35:30,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:35:30" (2/3) ... [2022-11-23 03:35:30,794 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33029567 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:35:30, skipping insertion in model container [2022-11-23 03:35:30,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:35:30" (3/3) ... [2022-11-23 03:35:30,795 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2_unwindbound100.c [2022-11-23 03:35:30,826 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 03:35:30,839 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 03:35:30,972 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 03:35:30,983 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;@65ee4691, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 03:35:30,984 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-11-23 03:35:30,989 INFO L276 IsEmpty]: Start isEmpty. Operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2022-11-23 03:35:30,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 03:35:30,998 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:35:30,999 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:35:31,000 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:35:31,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:35:31,013 INFO L85 PathProgramCache]: Analyzing trace with hash 643118537, now seen corresponding path program 1 times [2022-11-23 03:35:31,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:35:31,022 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079388627] [2022-11-23 03:35:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:31,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:35:31,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:35:31,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:35:31,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079388627] [2022-11-23 03:35:31,153 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-23 03:35:31,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625256659] [2022-11-23 03:35:31,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:31,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:35:31,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:35:31,158 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:35:31,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-23 03:35:31,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:35:31,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 1 conjunts are in the unsatisfiable core [2022-11-23 03:35:31,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:35:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:35:31,293 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:35:31,295 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625256659] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:35:31,295 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:35:31,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-23 03:35:31,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248332740] [2022-11-23 03:35:31,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:35:31,304 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-23 03:35:31,305 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:35:31,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-23 03:35:31,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 03:35:31,343 INFO L87 Difference]: Start difference. First operand has 26 states, 16 states have (on average 1.5625) internal successors, (25), 17 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:31,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:35:31,387 INFO L93 Difference]: Finished difference Result 50 states and 83 transitions. [2022-11-23 03:35:31,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-23 03:35:31,390 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 03:35:31,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:35:31,408 INFO L225 Difference]: With dead ends: 50 [2022-11-23 03:35:31,408 INFO L226 Difference]: Without dead ends: 22 [2022-11-23 03:35:31,412 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-23 03:35:31,422 INFO L413 NwaCegarLoop]: 36 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, 36 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 [2022-11-23 03:35:31,425 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 03:35:31,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-11-23 03:35:31,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-11-23 03:35:31,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 7 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 03:35:31,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 32 transitions. [2022-11-23 03:35:31,472 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 32 transitions. Word has length 8 [2022-11-23 03:35:31,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:35:31,473 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 32 transitions. [2022-11-23 03:35:31,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:31,474 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 32 transitions. [2022-11-23 03:35:31,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2022-11-23 03:35:31,474 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:35:31,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:35:31,488 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-23 03:35:31,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:35:31,680 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:35:31,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:35:31,681 INFO L85 PathProgramCache]: Analyzing trace with hash 181060127, now seen corresponding path program 1 times [2022-11-23 03:35:31,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:35:31,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407458505] [2022-11-23 03:35:31,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:31,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:35:31,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:35:31,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:35:31,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:35:31,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407458505] [2022-11-23 03:35:31,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407458505] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:35:31,896 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:35:31,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 03:35:31,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408887130] [2022-11-23 03:35:31,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:35:31,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:35:31,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:35:31,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:35:31,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:35:31,899 INFO L87 Difference]: Start difference. First operand 22 states and 32 transitions. Second operand has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:31,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:35:31,976 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2022-11-23 03:35:31,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:35:31,977 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2022-11-23 03:35:31,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:35:31,978 INFO L225 Difference]: With dead ends: 36 [2022-11-23 03:35:31,978 INFO L226 Difference]: Without dead ends: 34 [2022-11-23 03:35:31,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:35:31,980 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 15 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 03:35:31,981 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 99 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 03:35:31,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-11-23 03:35:31,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 26. [2022-11-23 03:35:31,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 16 states have (on average 1.375) internal successors, (22), 17 states have internal predecessors, (22), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 03:35:31,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 35 transitions. [2022-11-23 03:35:31,991 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 35 transitions. Word has length 8 [2022-11-23 03:35:31,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:35:31,991 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 35 transitions. [2022-11-23 03:35:31,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.4) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:31,992 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 35 transitions. [2022-11-23 03:35:31,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-11-23 03:35:31,993 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:35:31,993 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:35:31,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 03:35:31,994 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:35:31,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:35:31,994 INFO L85 PathProgramCache]: Analyzing trace with hash -712280900, now seen corresponding path program 1 times [2022-11-23 03:35:31,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:35:31,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316267509] [2022-11-23 03:35:31,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:31,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:35:32,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:35:32,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:35:32,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316267509] [2022-11-23 03:35:32,033 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2022-11-23 03:35:32,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497819669] [2022-11-23 03:35:32,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:32,034 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:35:32,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:35:32,035 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:35:32,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-23 03:35:32,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:35:32,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-23 03:35:32,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:35:32,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:35:32,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:35:32,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497819669] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:35:32,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:35:32,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 03:35:32,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786877239] [2022-11-23 03:35:32,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:35:32,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 03:35:32,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:35:32,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 03:35:32,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:35:32,151 INFO L87 Difference]: Start difference. First operand 26 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:32,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:35:32,170 INFO L93 Difference]: Finished difference Result 42 states and 57 transitions. [2022-11-23 03:35:32,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 03:35:32,170 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2022-11-23 03:35:32,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:35:32,171 INFO L225 Difference]: With dead ends: 42 [2022-11-23 03:35:32,171 INFO L226 Difference]: Without dead ends: 28 [2022-11-23 03:35:32,172 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 03:35:32,173 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 0 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 03:35:32,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 85 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 03:35:32,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-11-23 03:35:32,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-11-23 03:35:32,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 19 states have internal predecessors, (24), 7 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 03:35:32,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 37 transitions. [2022-11-23 03:35:32,182 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 37 transitions. Word has length 10 [2022-11-23 03:35:32,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:35:32,182 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 37 transitions. [2022-11-23 03:35:32,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 03:35:32,182 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 37 transitions. [2022-11-23 03:35:32,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 03:35:32,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:35:32,183 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:35:32,194 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-23 03:35:32,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:35:32,389 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:35:32,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:35:32,390 INFO L85 PathProgramCache]: Analyzing trace with hash 2036073049, now seen corresponding path program 1 times [2022-11-23 03:35:32,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:35:32,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740172407] [2022-11-23 03:35:32,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:32,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:35:32,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:35:32,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 4 [2022-11-23 03:35:32,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:35:32,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 03:35:32,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:35:32,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740172407] [2022-11-23 03:35:32,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740172407] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:35:32,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:35:32,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 03:35:32,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839160404] [2022-11-23 03:35:32,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:35:32,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 03:35:32,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:35:32,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 03:35:32,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 03:35:32,576 INFO L87 Difference]: Start difference. First operand 28 states and 37 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 03:35:32,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:35:32,657 INFO L93 Difference]: Finished difference Result 42 states and 56 transitions. [2022-11-23 03:35:32,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:35:32,657 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-11-23 03:35:32,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:35:32,658 INFO L225 Difference]: With dead ends: 42 [2022-11-23 03:35:32,659 INFO L226 Difference]: Without dead ends: 40 [2022-11-23 03:35:32,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:35:32,660 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 13 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:35:32,661 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 95 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:35:32,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-11-23 03:35:32,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2022-11-23 03:35:32,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 22 states have internal predecessors, (27), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2022-11-23 03:35:32,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-11-23 03:35:32,670 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 13 [2022-11-23 03:35:32,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:35:32,671 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-11-23 03:35:32,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-11-23 03:35:32,671 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-11-23 03:35:32,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-11-23 03:35:32,672 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:35:32,672 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:35:32,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 03:35:32,673 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:35:32,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:35:32,673 INFO L85 PathProgramCache]: Analyzing trace with hash 380169759, now seen corresponding path program 1 times [2022-11-23 03:35:32,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:35:32,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282152895] [2022-11-23 03:35:32,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:32,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:35:32,685 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 03:35:32,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2036629035] [2022-11-23 03:35:32,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:32,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:35:32,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:35:32,687 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:35:32,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-23 03:35:32,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:35:32,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-23 03:35:32,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:35:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:35:33,012 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:35:33,235 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-23 03:35:33,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:35:33,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282152895] [2022-11-23 03:35:33,236 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 03:35:33,237 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036629035] [2022-11-23 03:35:33,237 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036629035] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:35:33,237 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:35:33,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2022-11-23 03:35:33,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403816288] [2022-11-23 03:35:33,238 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:35:33,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-11-23 03:35:33,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:35:33,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-11-23 03:35:33,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2022-11-23 03:35:33,240 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 03:35:33,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:35:33,765 INFO L93 Difference]: Finished difference Result 71 states and 96 transitions. [2022-11-23 03:35:33,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 03:35:33,766 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 18 [2022-11-23 03:35:33,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:35:33,769 INFO L225 Difference]: With dead ends: 71 [2022-11-23 03:35:33,769 INFO L226 Difference]: Without dead ends: 56 [2022-11-23 03:35:33,770 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2022-11-23 03:35:33,773 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 48 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 03:35:33,776 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 79 Invalid, 186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 03:35:33,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-11-23 03:35:33,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 54. [2022-11-23 03:35:33,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 36 states have internal predecessors, (42), 15 states have call successors, (15), 5 states have call predecessors, (15), 5 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2022-11-23 03:35:33,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 70 transitions. [2022-11-23 03:35:33,810 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 70 transitions. Word has length 18 [2022-11-23 03:35:33,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:35:33,810 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 70 transitions. [2022-11-23 03:35:33,811 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 4 states have call successors, (6), 3 states have call predecessors, (6), 2 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2022-11-23 03:35:33,811 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 70 transitions. [2022-11-23 03:35:33,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-11-23 03:35:33,813 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:35:33,813 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:35:33,824 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-23 03:35:34,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:35:34,020 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:35:34,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:35:34,021 INFO L85 PathProgramCache]: Analyzing trace with hash -461064832, now seen corresponding path program 1 times [2022-11-23 03:35:34,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:35:34,021 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765985658] [2022-11-23 03:35:34,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:34,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:35:34,033 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 03:35:34,033 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1741011124] [2022-11-23 03:35:34,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:34,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:35:34,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:35:34,035 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:35:34,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-23 03:35:34,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:35:34,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 17 conjunts are in the unsatisfiable core [2022-11-23 03:35:34,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:35:34,203 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 03:35:34,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:35:34,411 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2022-11-23 03:35:34,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:35:34,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765985658] [2022-11-23 03:35:34,418 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 03:35:34,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741011124] [2022-11-23 03:35:34,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741011124] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:35:34,418 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:35:34,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2022-11-23 03:35:34,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906171248] [2022-11-23 03:35:34,419 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:35:34,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-11-23 03:35:34,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:35:34,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-11-23 03:35:34,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2022-11-23 03:35:34,420 INFO L87 Difference]: Start difference. First operand 54 states and 70 transitions. Second operand has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-23 03:35:34,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:35:34,668 INFO L93 Difference]: Finished difference Result 73 states and 97 transitions. [2022-11-23 03:35:34,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 03:35:34,669 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) Word has length 26 [2022-11-23 03:35:34,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:35:34,670 INFO L225 Difference]: With dead ends: 73 [2022-11-23 03:35:34,670 INFO L226 Difference]: Without dead ends: 65 [2022-11-23 03:35:34,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2022-11-23 03:35:34,672 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 40 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 03:35:34,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 71 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 03:35:34,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-11-23 03:35:34,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2022-11-23 03:35:34,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 39 states have (on average 1.2820512820512822) internal successors, (50), 43 states have internal predecessors, (50), 16 states have call successors, (16), 6 states have call predecessors, (16), 6 states have return successors, (15), 12 states have call predecessors, (15), 15 states have call successors, (15) [2022-11-23 03:35:34,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 81 transitions. [2022-11-23 03:35:34,697 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 81 transitions. Word has length 26 [2022-11-23 03:35:34,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:35:34,697 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 81 transitions. [2022-11-23 03:35:34,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.3636363636363638) internal successors, (26), 10 states have internal predecessors, (26), 3 states have call successors, (8), 3 states have call predecessors, (8), 2 states have return successors, (6), 3 states have call predecessors, (6), 3 states have call successors, (6) [2022-11-23 03:35:34,698 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 81 transitions. [2022-11-23 03:35:34,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-11-23 03:35:34,698 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:35:34,699 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:35:34,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-23 03:35:34,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-11-23 03:35:34,899 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:35:34,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:35:34,900 INFO L85 PathProgramCache]: Analyzing trace with hash 847666457, now seen corresponding path program 1 times [2022-11-23 03:35:34,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:35:34,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876475345] [2022-11-23 03:35:34,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:34,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:35:34,910 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 03:35:34,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1559094518] [2022-11-23 03:35:34,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:34,910 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:35:34,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:35:34,915 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:35:34,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-23 03:35:34,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:35:34,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-23 03:35:34,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:35:35,045 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 2 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2022-11-23 03:35:35,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:35:35,108 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2022-11-23 03:35:35,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:35:35,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876475345] [2022-11-23 03:35:35,117 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 03:35:35,117 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559094518] [2022-11-23 03:35:35,118 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559094518] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:35:35,118 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:35:35,118 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2022-11-23 03:35:35,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680682276] [2022-11-23 03:35:35,119 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:35:35,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-11-23 03:35:35,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:35:35,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-11-23 03:35:35,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-23 03:35:35,123 INFO L87 Difference]: Start difference. First operand 62 states and 81 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-23 03:35:35,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:35:35,265 INFO L93 Difference]: Finished difference Result 165 states and 205 transitions. [2022-11-23 03:35:35,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-23 03:35:35,266 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 33 [2022-11-23 03:35:35,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:35:35,271 INFO L225 Difference]: With dead ends: 165 [2022-11-23 03:35:35,272 INFO L226 Difference]: Without dead ends: 127 [2022-11-23 03:35:35,275 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2022-11-23 03:35:35,277 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 41 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:35:35,277 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 137 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:35:35,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-11-23 03:35:35,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 121. [2022-11-23 03:35:35,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 79 states have (on average 1.1898734177215189) internal successors, (94), 83 states have internal predecessors, (94), 26 states have call successors, (26), 16 states have call predecessors, (26), 15 states have return successors, (24), 21 states have call predecessors, (24), 24 states have call successors, (24) [2022-11-23 03:35:35,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 144 transitions. [2022-11-23 03:35:35,325 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 144 transitions. Word has length 33 [2022-11-23 03:35:35,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:35:35,326 INFO L495 AbstractCegarLoop]: Abstraction has 121 states and 144 transitions. [2022-11-23 03:35:35,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2022-11-23 03:35:35,327 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 144 transitions. [2022-11-23 03:35:35,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-11-23 03:35:35,335 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:35:35,335 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:35:35,347 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-23 03:35:35,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:35:35,542 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:35:35,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:35:35,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1605675221, now seen corresponding path program 1 times [2022-11-23 03:35:35,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:35:35,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498869815] [2022-11-23 03:35:35,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:35,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:35:35,553 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 03:35:35,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [354418621] [2022-11-23 03:35:35,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:35,555 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:35:35,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:35:35,556 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:35:35,581 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-23 03:35:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:35:35,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-23 03:35:35,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:35:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 36 proven. 42 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2022-11-23 03:35:35,719 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:35:35,813 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 14 proven. 6 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2022-11-23 03:35:35,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:35:35,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498869815] [2022-11-23 03:35:35,814 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 03:35:35,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354418621] [2022-11-23 03:35:35,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354418621] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:35:35,814 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:35:35,815 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2022-11-23 03:35:35,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068089757] [2022-11-23 03:35:35,815 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:35:35,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-23 03:35:35,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:35:35,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-23 03:35:35,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2022-11-23 03:35:35,818 INFO L87 Difference]: Start difference. First operand 121 states and 144 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-23 03:35:36,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:35:36,039 INFO L93 Difference]: Finished difference Result 249 states and 307 transitions. [2022-11-23 03:35:36,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 03:35:36,040 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) Word has length 49 [2022-11-23 03:35:36,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:35:36,045 INFO L225 Difference]: With dead ends: 249 [2022-11-23 03:35:36,045 INFO L226 Difference]: Without dead ends: 228 [2022-11-23 03:35:36,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2022-11-23 03:35:36,047 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 103 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:35:36,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 261 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:35:36,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-11-23 03:35:36,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 221. [2022-11-23 03:35:36,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 144 states have (on average 1.1944444444444444) internal successors, (172), 155 states have internal predecessors, (172), 51 states have call successors, (51), 26 states have call predecessors, (51), 25 states have return successors, (47), 39 states have call predecessors, (47), 47 states have call successors, (47) [2022-11-23 03:35:36,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 270 transitions. [2022-11-23 03:35:36,102 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 270 transitions. Word has length 49 [2022-11-23 03:35:36,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:35:36,102 INFO L495 AbstractCegarLoop]: Abstraction has 221 states and 270 transitions. [2022-11-23 03:35:36,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 10 states have internal predecessors, (34), 5 states have call successors, (15), 4 states have call predecessors, (15), 4 states have return successors, (14), 5 states have call predecessors, (14), 5 states have call successors, (14) [2022-11-23 03:35:36,103 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 270 transitions. [2022-11-23 03:35:36,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-11-23 03:35:36,104 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:35:36,104 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:35:36,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-23 03:35:36,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-23 03:35:36,309 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:35:36,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:35:36,310 INFO L85 PathProgramCache]: Analyzing trace with hash -1800695307, now seen corresponding path program 1 times [2022-11-23 03:35:36,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:35:36,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508734635] [2022-11-23 03:35:36,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:36,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:35:36,318 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 03:35:36,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [549122262] [2022-11-23 03:35:36,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:36,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:35:36,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:35:36,321 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:35:36,339 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-23 03:35:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:35:36,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 33 conjunts are in the unsatisfiable core [2022-11-23 03:35:36,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:35:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-23 03:35:36,743 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:35:38,230 INFO L134 CoverageAnalysis]: Checked inductivity of 137 backedges. 18 proven. 28 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2022-11-23 03:35:38,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:35:38,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508734635] [2022-11-23 03:35:38,231 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 03:35:38,231 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549122262] [2022-11-23 03:35:38,231 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549122262] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:35:38,232 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:35:38,232 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2022-11-23 03:35:38,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804446730] [2022-11-23 03:35:38,232 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:35:38,233 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-23 03:35:38,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:35:38,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-23 03:35:38,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2022-11-23 03:35:38,234 INFO L87 Difference]: Start difference. First operand 221 states and 270 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-23 03:35:44,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:35:44,448 INFO L93 Difference]: Finished difference Result 372 states and 479 transitions. [2022-11-23 03:35:44,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 03:35:44,449 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 58 [2022-11-23 03:35:44,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:35:44,451 INFO L225 Difference]: With dead ends: 372 [2022-11-23 03:35:44,452 INFO L226 Difference]: Without dead ends: 299 [2022-11-23 03:35:44,453 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-11-23 03:35:44,454 INFO L413 NwaCegarLoop]: 36 mSDtfsCounter, 74 mSDsluCounter, 111 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-11-23 03:35:44,454 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 147 Invalid, 533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-11-23 03:35:44,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2022-11-23 03:35:44,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 272. [2022-11-23 03:35:44,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 186 states have (on average 1.2258064516129032) internal successors, (228), 194 states have internal predecessors, (228), 56 states have call successors, (56), 29 states have call predecessors, (56), 29 states have return successors, (54), 48 states have call predecessors, (54), 54 states have call successors, (54) [2022-11-23 03:35:44,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 338 transitions. [2022-11-23 03:35:44,534 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 338 transitions. Word has length 58 [2022-11-23 03:35:44,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:35:44,536 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 338 transitions. [2022-11-23 03:35:44,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 7 states have call successors, (18), 3 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2022-11-23 03:35:44,536 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 338 transitions. [2022-11-23 03:35:44,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-11-23 03:35:44,540 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:35:44,541 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:35:44,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-23 03:35:44,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-23 03:35:44,747 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:35:44,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:35:44,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1688778742, now seen corresponding path program 1 times [2022-11-23 03:35:44,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:35:44,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334451291] [2022-11-23 03:35:44,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:44,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:35:44,764 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 03:35:44,773 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [28525114] [2022-11-23 03:35:44,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:44,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:35:44,774 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:35:44,775 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:35:44,799 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-23 03:35:44,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:35:44,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 35 conjunts are in the unsatisfiable core [2022-11-23 03:35:44,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:35:45,198 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-23 03:35:45,198 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:35:45,886 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2022-11-23 03:35:45,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:35:45,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334451291] [2022-11-23 03:35:45,886 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 03:35:45,887 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28525114] [2022-11-23 03:35:45,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28525114] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:35:45,887 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:35:45,887 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-11-23 03:35:45,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747706936] [2022-11-23 03:35:45,890 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:35:45,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 03:35:45,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:35:45,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 03:35:45,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2022-11-23 03:35:45,892 INFO L87 Difference]: Start difference. First operand 272 states and 338 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-23 03:35:46,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:35:46,921 INFO L93 Difference]: Finished difference Result 341 states and 423 transitions. [2022-11-23 03:35:46,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-23 03:35:46,921 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 69 [2022-11-23 03:35:46,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:35:46,923 INFO L225 Difference]: With dead ends: 341 [2022-11-23 03:35:46,923 INFO L226 Difference]: Without dead ends: 260 [2022-11-23 03:35:46,924 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 121 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-11-23 03:35:46,925 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 67 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-11-23 03:35:46,925 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [70 Valid, 111 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-11-23 03:35:46,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-11-23 03:35:46,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 236. [2022-11-23 03:35:46,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 161 states have (on average 1.1801242236024845) internal successors, (190), 165 states have internal predecessors, (190), 46 states have call successors, (46), 29 states have call predecessors, (46), 28 states have return successors, (44), 41 states have call predecessors, (44), 44 states have call successors, (44) [2022-11-23 03:35:46,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 280 transitions. [2022-11-23 03:35:46,996 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 280 transitions. Word has length 69 [2022-11-23 03:35:46,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:35:46,997 INFO L495 AbstractCegarLoop]: Abstraction has 236 states and 280 transitions. [2022-11-23 03:35:46,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (22), 3 states have call predecessors, (22), 2 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2022-11-23 03:35:46,998 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 280 transitions. [2022-11-23 03:35:46,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-11-23 03:35:46,999 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:35:46,999 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:35:47,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-23 03:35:47,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:35:47,211 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:35:47,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:35:47,211 INFO L85 PathProgramCache]: Analyzing trace with hash -428937714, now seen corresponding path program 1 times [2022-11-23 03:35:47,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:35:47,212 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766209799] [2022-11-23 03:35:47,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:47,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:35:47,222 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 03:35:47,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2055790236] [2022-11-23 03:35:47,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:47,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:35:47,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:35:47,224 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:35:47,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-23 03:35:47,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:35:47,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 29 conjunts are in the unsatisfiable core [2022-11-23 03:35:47,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:35:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-23 03:35:47,550 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:35:48,090 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2022-11-23 03:35:48,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:35:48,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766209799] [2022-11-23 03:35:48,091 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 03:35:48,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055790236] [2022-11-23 03:35:48,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2055790236] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:35:48,091 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:35:48,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2022-11-23 03:35:48,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565808779] [2022-11-23 03:35:48,092 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:35:48,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 03:35:48,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:35:48,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 03:35:48,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2022-11-23 03:35:48,093 INFO L87 Difference]: Start difference. First operand 236 states and 280 transitions. Second operand has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-11-23 03:35:48,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:35:48,674 INFO L93 Difference]: Finished difference Result 260 states and 307 transitions. [2022-11-23 03:35:48,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-11-23 03:35:48,676 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) Word has length 74 [2022-11-23 03:35:48,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:35:48,680 INFO L225 Difference]: With dead ends: 260 [2022-11-23 03:35:48,681 INFO L226 Difference]: Without dead ends: 215 [2022-11-23 03:35:48,681 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2022-11-23 03:35:48,682 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 52 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 456 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 03:35:48,682 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 165 Invalid, 456 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 03:35:48,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-11-23 03:35:48,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 210. [2022-11-23 03:35:48,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 143 states have (on average 1.1468531468531469) internal successors, (164), 148 states have internal predecessors, (164), 41 states have call successors, (41), 25 states have call predecessors, (41), 25 states have return successors, (39), 36 states have call predecessors, (39), 39 states have call successors, (39) [2022-11-23 03:35:48,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 244 transitions. [2022-11-23 03:35:48,757 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 244 transitions. Word has length 74 [2022-11-23 03:35:48,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:35:48,757 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 244 transitions. [2022-11-23 03:35:48,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 3.0) internal successors, (42), 15 states have internal predecessors, (42), 8 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (22), 8 states have call predecessors, (22), 8 states have call successors, (22) [2022-11-23 03:35:48,758 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 244 transitions. [2022-11-23 03:35:48,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-11-23 03:35:48,759 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:35:48,759 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2022-11-23 03:35:48,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-23 03:35:48,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:35:48,969 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:35:48,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:35:48,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1611798954, now seen corresponding path program 2 times [2022-11-23 03:35:48,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:35:48,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473283605] [2022-11-23 03:35:48,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:35:48,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:35:48,982 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 03:35:48,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1325249109] [2022-11-23 03:35:48,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:35:48,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:35:48,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:35:48,987 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:35:48,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-23 03:35:49,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:35:49,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:35:49,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 46 conjunts are in the unsatisfiable core [2022-11-23 03:35:49,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:35:49,640 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-23 03:35:49,640 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:36:26,495 INFO L134 CoverageAnalysis]: Checked inductivity of 368 backedges. 28 proven. 64 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2022-11-23 03:36:26,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:36:26,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473283605] [2022-11-23 03:36:26,495 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 03:36:26,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325249109] [2022-11-23 03:36:26,496 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325249109] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:36:26,496 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:36:26,496 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2022-11-23 03:36:26,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917831571] [2022-11-23 03:36:26,496 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:36:26,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 03:36:26,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:36:26,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 03:36:26,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=336, Unknown=2, NotChecked=0, Total=420 [2022-11-23 03:36:26,498 INFO L87 Difference]: Start difference. First operand 210 states and 244 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-11-23 03:36:45,026 WARN L233 SmtUtils]: Spent 17.26s on a formula simplification. DAG size of input: 172 DAG size of output: 104 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-23 03:36:47,844 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.30s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 03:36:49,050 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 03:36:52,997 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 03:37:00,322 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 03:37:02,849 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2022-11-23 03:37:02,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:37:02,863 INFO L93 Difference]: Finished difference Result 306 states and 390 transitions. [2022-11-23 03:37:02,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-11-23 03:37:02,864 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) Word has length 90 [2022-11-23 03:37:02,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:37:02,867 INFO L225 Difference]: With dead ends: 306 [2022-11-23 03:37:02,867 INFO L226 Difference]: Without dead ends: 262 [2022-11-23 03:37:02,868 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 32.3s TimeCoverageRelationStatistics Valid=151, Invalid=548, Unknown=3, NotChecked=0, Total=702 [2022-11-23 03:37:02,868 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 159 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 1062 mSolverCounterSat, 215 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 1062 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.5s IncrementalHoareTripleChecker+Time [2022-11-23 03:37:02,869 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 328 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 1062 Invalid, 1 Unknown, 0 Unchecked, 13.5s Time] [2022-11-23 03:37:02,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-11-23 03:37:02,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 247. [2022-11-23 03:37:02,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 166 states have (on average 1.1987951807228916) internal successors, (199), 175 states have internal predecessors, (199), 54 states have call successors, (54), 26 states have call predecessors, (54), 26 states have return successors, (52), 45 states have call predecessors, (52), 52 states have call successors, (52) [2022-11-23 03:37:02,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 305 transitions. [2022-11-23 03:37:02,995 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 305 transitions. Word has length 90 [2022-11-23 03:37:02,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:37:02,995 INFO L495 AbstractCegarLoop]: Abstraction has 247 states and 305 transitions. [2022-11-23 03:37:02,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 19 states have internal predecessors, (54), 11 states have call successors, (28), 3 states have call predecessors, (28), 2 states have return successors, (26), 9 states have call predecessors, (26), 9 states have call successors, (26) [2022-11-23 03:37:02,996 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 305 transitions. [2022-11-23 03:37:02,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-11-23 03:37:02,997 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:37:02,997 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 5, 4, 4, 4, 4, 4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:37:03,004 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-23 03:37:03,203 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:37:03,204 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:37:03,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:37:03,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1991126182, now seen corresponding path program 1 times [2022-11-23 03:37:03,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:37:03,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338121395] [2022-11-23 03:37:03,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:37:03,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:37:03,217 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 03:37:03,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [798440880] [2022-11-23 03:37:03,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:37:03,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:37:03,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:37:03,219 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:37:03,232 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-23 03:37:03,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:37:03,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-23 03:37:03,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:37:03,438 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 120 proven. 260 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2022-11-23 03:37:03,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:37:03,568 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 28 proven. 44 refuted. 0 times theorem prover too weak. 366 trivial. 0 not checked. [2022-11-23 03:37:03,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:37:03,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338121395] [2022-11-23 03:37:03,569 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 03:37:03,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798440880] [2022-11-23 03:37:03,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798440880] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:37:03,569 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:37:03,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2022-11-23 03:37:03,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514525927] [2022-11-23 03:37:03,570 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:37:03,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-23 03:37:03,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:37:03,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-23 03:37:03,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2022-11-23 03:37:03,571 INFO L87 Difference]: Start difference. First operand 247 states and 305 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-11-23 03:37:04,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:37:04,225 INFO L93 Difference]: Finished difference Result 707 states and 937 transitions. [2022-11-23 03:37:04,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-23 03:37:04,226 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) Word has length 96 [2022-11-23 03:37:04,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:37:04,229 INFO L225 Difference]: With dead ends: 707 [2022-11-23 03:37:04,230 INFO L226 Difference]: Without dead ends: 629 [2022-11-23 03:37:04,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2022-11-23 03:37:04,231 INFO L413 NwaCegarLoop]: 74 mSDtfsCounter, 208 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 293 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 03:37:04,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 293 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 03:37:04,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2022-11-23 03:37:04,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 549. [2022-11-23 03:37:04,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549 states, 362 states have (on average 1.270718232044199) internal successors, (460), 391 states have internal predecessors, (460), 134 states have call successors, (134), 53 states have call predecessors, (134), 52 states have return successors, (127), 104 states have call predecessors, (127), 127 states have call successors, (127) [2022-11-23 03:37:04,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549 states to 549 states and 721 transitions. [2022-11-23 03:37:04,512 INFO L78 Accepts]: Start accepts. Automaton has 549 states and 721 transitions. Word has length 96 [2022-11-23 03:37:04,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:37:04,513 INFO L495 AbstractCegarLoop]: Abstraction has 549 states and 721 transitions. [2022-11-23 03:37:04,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 14 states have internal predecessors, (57), 9 states have call successors, (29), 6 states have call predecessors, (29), 6 states have return successors, (28), 9 states have call predecessors, (28), 9 states have call successors, (28) [2022-11-23 03:37:04,513 INFO L276 IsEmpty]: Start isEmpty. Operand 549 states and 721 transitions. [2022-11-23 03:37:04,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-11-23 03:37:04,515 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:37:04,515 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:37:04,521 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-23 03:37:04,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:37:04,721 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:37:04,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:37:04,721 INFO L85 PathProgramCache]: Analyzing trace with hash -218084043, now seen corresponding path program 2 times [2022-11-23 03:37:04,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:37:04,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960977810] [2022-11-23 03:37:04,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:37:04,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:37:04,730 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 03:37:04,731 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1742859773] [2022-11-23 03:37:04,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:37:04,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:37:04,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:37:04,732 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:37:04,751 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-23 03:37:04,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:37:04,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:37:04,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 48 conjunts are in the unsatisfiable core [2022-11-23 03:37:04,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:37:05,321 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-11-23 03:37:05,322 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:37:13,843 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 32 proven. 74 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2022-11-23 03:37:13,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:37:13,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960977810] [2022-11-23 03:37:13,844 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 03:37:13,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742859773] [2022-11-23 03:37:13,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742859773] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:37:13,844 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:37:13,844 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 21 [2022-11-23 03:37:13,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878985207] [2022-11-23 03:37:13,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:37:13,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-11-23 03:37:13,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:37:13,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-11-23 03:37:13,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2022-11-23 03:37:13,846 INFO L87 Difference]: Start difference. First operand 549 states and 721 transitions. Second operand has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2022-11-23 03:37:25,397 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 [] [2022-11-23 03:37:27,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:37:27,789 INFO L93 Difference]: Finished difference Result 672 states and 874 transitions. [2022-11-23 03:37:27,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-11-23 03:37:27,790 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) Word has length 101 [2022-11-23 03:37:27,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:37:27,793 INFO L225 Difference]: With dead ends: 672 [2022-11-23 03:37:27,793 INFO L226 Difference]: Without dead ends: 511 [2022-11-23 03:37:27,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 178 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=227, Invalid=765, Unknown=0, NotChecked=0, Total=992 [2022-11-23 03:37:27,795 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 119 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 175 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-11-23 03:37:27,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 237 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 830 Invalid, 1 Unknown, 0 Unchecked, 6.4s Time] [2022-11-23 03:37:27,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-11-23 03:37:28,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 488. [2022-11-23 03:37:28,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 322 states have (on average 1.2111801242236024) internal successors, (390), 347 states have internal predecessors, (390), 112 states have call successors, (112), 53 states have call predecessors, (112), 53 states have return successors, (107), 87 states have call predecessors, (107), 107 states have call successors, (107) [2022-11-23 03:37:28,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 609 transitions. [2022-11-23 03:37:28,056 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 609 transitions. Word has length 101 [2022-11-23 03:37:28,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:37:28,056 INFO L495 AbstractCegarLoop]: Abstraction has 488 states and 609 transitions. [2022-11-23 03:37:28,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 19 states have (on average 2.9473684210526314) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (32), 3 states have call predecessors, (32), 2 states have return successors, (30), 10 states have call predecessors, (30), 10 states have call successors, (30) [2022-11-23 03:37:28,057 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 609 transitions. [2022-11-23 03:37:28,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-11-23 03:37:28,058 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:37:28,058 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:37:28,071 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-23 03:37:28,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-23 03:37:28,264 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:37:28,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:37:28,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1246855822, now seen corresponding path program 1 times [2022-11-23 03:37:28,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:37:28,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061097022] [2022-11-23 03:37:28,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:37:28,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:37:28,282 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 03:37:28,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225532770] [2022-11-23 03:37:28,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:37:28,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:37:28,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:37:28,284 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:37:28,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-23 03:37:28,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:37:28,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 03:37:28,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:37:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 414 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2022-11-23 03:37:28,566 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:37:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 492 backedges. 30 proven. 42 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2022-11-23 03:37:28,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:37:28,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061097022] [2022-11-23 03:37:28,778 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 03:37:28,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225532770] [2022-11-23 03:37:28,778 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225532770] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:37:28,779 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:37:28,779 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2022-11-23 03:37:28,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297657637] [2022-11-23 03:37:28,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:37:28,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-23 03:37:28,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:37:28,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-23 03:37:28,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=181, Unknown=0, NotChecked=0, Total=306 [2022-11-23 03:37:28,781 INFO L87 Difference]: Start difference. First operand 488 states and 609 transitions. Second operand has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2022-11-23 03:37:29,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:37:29,842 INFO L93 Difference]: Finished difference Result 915 states and 1190 transitions. [2022-11-23 03:37:29,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-11-23 03:37:29,842 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) Word has length 104 [2022-11-23 03:37:29,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:37:29,849 INFO L225 Difference]: With dead ends: 915 [2022-11-23 03:37:29,850 INFO L226 Difference]: Without dead ends: 880 [2022-11-23 03:37:29,852 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2022-11-23 03:37:29,853 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 348 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 242 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 348 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 242 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-11-23 03:37:29,853 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [348 Valid, 382 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [242 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-11-23 03:37:29,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-11-23 03:37:30,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 867. [2022-11-23 03:37:30,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 867 states, 579 states have (on average 1.1468048359240068) internal successors, (664), 619 states have internal predecessors, (664), 206 states have call successors, (206), 81 states have call predecessors, (206), 81 states have return successors, (198), 166 states have call predecessors, (198), 198 states have call successors, (198) [2022-11-23 03:37:30,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 867 states to 867 states and 1068 transitions. [2022-11-23 03:37:30,381 INFO L78 Accepts]: Start accepts. Automaton has 867 states and 1068 transitions. Word has length 104 [2022-11-23 03:37:30,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:37:30,381 INFO L495 AbstractCegarLoop]: Abstraction has 867 states and 1068 transitions. [2022-11-23 03:37:30,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.111111111111111) internal successors, (74), 18 states have internal predecessors, (74), 13 states have call successors, (31), 8 states have call predecessors, (31), 7 states have return successors, (30), 12 states have call predecessors, (30), 12 states have call successors, (30) [2022-11-23 03:37:30,382 INFO L276 IsEmpty]: Start isEmpty. Operand 867 states and 1068 transitions. [2022-11-23 03:37:30,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-11-23 03:37:30,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:37:30,384 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1] [2022-11-23 03:37:30,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-23 03:37:30,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-23 03:37:30,590 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:37:30,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:37:30,591 INFO L85 PathProgramCache]: Analyzing trace with hash -405037921, now seen corresponding path program 3 times [2022-11-23 03:37:30,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:37:30,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808269861] [2022-11-23 03:37:30,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:37:30,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:37:30,613 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 03:37:30,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711827188] [2022-11-23 03:37:30,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:37:30,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:37:30,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:37:30,616 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:37:30,635 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-23 03:37:30,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 03:37:30,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:37:30,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 28 conjunts are in the unsatisfiable core [2022-11-23 03:37:30,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:37:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 711 backedges. 145 proven. 2 refuted. 0 times theorem prover too weak. 564 trivial. 0 not checked. [2022-11-23 03:37:31,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:37:33,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:37:33,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808269861] [2022-11-23 03:37:33,475 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 03:37:33,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711827188] [2022-11-23 03:37:33,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711827188] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-23 03:37:33,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2022-11-23 03:37:33,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2022-11-23 03:37:33,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575973626] [2022-11-23 03:37:33,476 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2022-11-23 03:37:33,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 03:37:33,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:37:33,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 03:37:33,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-23 03:37:33,477 INFO L87 Difference]: Start difference. First operand 867 states and 1068 transitions. Second operand has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 03:37:34,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:37:34,113 INFO L93 Difference]: Finished difference Result 897 states and 1097 transitions. [2022-11-23 03:37:34,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 03:37:34,114 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) Word has length 122 [2022-11-23 03:37:34,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:37:34,117 INFO L225 Difference]: With dead ends: 897 [2022-11-23 03:37:34,118 INFO L226 Difference]: Without dead ends: 883 [2022-11-23 03:37:34,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 117 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2022-11-23 03:37:34,119 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 28 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:37:34,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 57 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:37:34,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-11-23 03:37:34,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 868. [2022-11-23 03:37:34,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 584 states have (on average 1.1352739726027397) internal successors, (663), 618 states have internal predecessors, (663), 201 states have call successors, (201), 83 states have call predecessors, (201), 82 states have return successors, (198), 166 states have call predecessors, (198), 198 states have call successors, (198) [2022-11-23 03:37:34,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1062 transitions. [2022-11-23 03:37:34,518 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1062 transitions. Word has length 122 [2022-11-23 03:37:34,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:37:34,519 INFO L495 AbstractCegarLoop]: Abstraction has 868 states and 1062 transitions. [2022-11-23 03:37:34,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.5555555555555554) internal successors, (23), 8 states have internal predecessors, (23), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 3 states have call predecessors, (7), 2 states have call successors, (7) [2022-11-23 03:37:34,519 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1062 transitions. [2022-11-23 03:37:34,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-11-23 03:37:34,521 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:37:34,522 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:37:34,528 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-23 03:37:34,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-23 03:37:34,728 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:37:34,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:37:34,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1989463840, now seen corresponding path program 3 times [2022-11-23 03:37:34,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:37:34,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510461801] [2022-11-23 03:37:34,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:37:34,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:37:34,738 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 03:37:34,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1379218010] [2022-11-23 03:37:34,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:37:34,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:37:34,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:37:34,739 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:37:34,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-23 03:37:34,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2022-11-23 03:37:34,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:37:34,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 27 conjunts are in the unsatisfiable core [2022-11-23 03:37:34,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:37:35,038 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 163 proven. 56 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2022-11-23 03:37:35,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:37:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 869 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2022-11-23 03:37:35,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:37:35,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510461801] [2022-11-23 03:37:35,262 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 03:37:35,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379218010] [2022-11-23 03:37:35,262 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1379218010] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:37:35,262 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:37:35,262 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2022-11-23 03:37:35,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270403339] [2022-11-23 03:37:35,262 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:37:35,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-23 03:37:35,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:37:35,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-23 03:37:35,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-11-23 03:37:35,264 INFO L87 Difference]: Start difference. First operand 868 states and 1062 transitions. Second operand has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-23 03:37:36,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:37:36,095 INFO L93 Difference]: Finished difference Result 875 states and 1068 transitions. [2022-11-23 03:37:36,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-23 03:37:36,096 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) Word has length 133 [2022-11-23 03:37:36,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:37:36,100 INFO L225 Difference]: With dead ends: 875 [2022-11-23 03:37:36,100 INFO L226 Difference]: Without dead ends: 865 [2022-11-23 03:37:36,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2022-11-23 03:37:36,102 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 93 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 03:37:36,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 72 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 03:37:36,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 865 states. [2022-11-23 03:37:36,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 865 to 557. [2022-11-23 03:37:36,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 557 states, 374 states have (on average 1.106951871657754) internal successors, (414), 394 states have internal predecessors, (414), 115 states have call successors, (115), 67 states have call predecessors, (115), 67 states have return successors, (114), 95 states have call predecessors, (114), 114 states have call successors, (114) [2022-11-23 03:37:36,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 557 states to 557 states and 643 transitions. [2022-11-23 03:37:36,525 INFO L78 Accepts]: Start accepts. Automaton has 557 states and 643 transitions. Word has length 133 [2022-11-23 03:37:36,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:37:36,525 INFO L495 AbstractCegarLoop]: Abstraction has 557 states and 643 transitions. [2022-11-23 03:37:36,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 7 states have call successors, (17), 3 states have call predecessors, (17), 2 states have return successors, (18), 7 states have call predecessors, (18), 5 states have call successors, (18) [2022-11-23 03:37:36,526 INFO L276 IsEmpty]: Start isEmpty. Operand 557 states and 643 transitions. [2022-11-23 03:37:36,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-11-23 03:37:36,530 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:37:36,530 INFO L195 NwaCegarLoop]: trace histogram [32, 31, 31, 12, 11, 11, 11, 11, 11, 11, 10, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:37:36,536 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-23 03:37:36,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:37:36,736 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:37:36,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:37:36,736 INFO L85 PathProgramCache]: Analyzing trace with hash 694795218, now seen corresponding path program 2 times [2022-11-23 03:37:36,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:37:36,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93252097] [2022-11-23 03:37:36,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:37:36,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:37:36,763 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 03:37:36,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [237741792] [2022-11-23 03:37:36,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:37:36,764 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:37:36,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:37:36,765 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:37:36,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-23 03:37:36,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:37:36,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:37:36,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 31 conjunts are in the unsatisfiable core [2022-11-23 03:37:36,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:37:37,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2292 backedges. 62 proven. 2150 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2022-11-23 03:37:37,344 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:37:37,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2292 backedges. 62 proven. 370 refuted. 0 times theorem prover too weak. 1860 trivial. 0 not checked. [2022-11-23 03:37:37,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:37:37,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93252097] [2022-11-23 03:37:37,923 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 03:37:37,923 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237741792] [2022-11-23 03:37:37,923 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [237741792] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:37:37,923 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:37:37,923 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 34 [2022-11-23 03:37:37,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468588914] [2022-11-23 03:37:37,923 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:37:37,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-23 03:37:37,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:37:37,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-23 03:37:37,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=621, Unknown=0, NotChecked=0, Total=1122 [2022-11-23 03:37:37,925 INFO L87 Difference]: Start difference. First operand 557 states and 643 transitions. Second operand has 34 states, 34 states have (on average 4.764705882352941) internal successors, (162), 34 states have internal predecessors, (162), 29 states have call successors, (63), 16 states have call predecessors, (63), 15 states have return successors, (62), 28 states have call predecessors, (62), 28 states have call successors, (62) [2022-11-23 03:37:40,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:37:40,664 INFO L93 Difference]: Finished difference Result 1291 states and 1585 transitions. [2022-11-23 03:37:40,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-11-23 03:37:40,665 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 4.764705882352941) internal successors, (162), 34 states have internal predecessors, (162), 29 states have call successors, (63), 16 states have call predecessors, (63), 15 states have return successors, (62), 28 states have call predecessors, (62), 28 states have call successors, (62) Word has length 216 [2022-11-23 03:37:40,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:37:40,671 INFO L225 Difference]: With dead ends: 1291 [2022-11-23 03:37:40,671 INFO L226 Difference]: Without dead ends: 1278 [2022-11-23 03:37:40,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 398 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1267, Invalid=2273, Unknown=0, NotChecked=0, Total=3540 [2022-11-23 03:37:40,673 INFO L413 NwaCegarLoop]: 167 mSDtfsCounter, 1006 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 791 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1006 SdHoareTripleChecker+Valid, 839 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 791 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-11-23 03:37:40,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1006 Valid, 839 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [791 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-11-23 03:37:40,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1278 states. [2022-11-23 03:37:41,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1278 to 1277. [2022-11-23 03:37:41,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1277 states, 854 states have (on average 1.1217798594847774) internal successors, (958), 906 states have internal predecessors, (958), 275 states have call successors, (275), 147 states have call predecessors, (275), 147 states have return successors, (274), 223 states have call predecessors, (274), 274 states have call successors, (274) [2022-11-23 03:37:41,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1277 states to 1277 states and 1507 transitions. [2022-11-23 03:37:41,433 INFO L78 Accepts]: Start accepts. Automaton has 1277 states and 1507 transitions. Word has length 216 [2022-11-23 03:37:41,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:37:41,434 INFO L495 AbstractCegarLoop]: Abstraction has 1277 states and 1507 transitions. [2022-11-23 03:37:41,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 4.764705882352941) internal successors, (162), 34 states have internal predecessors, (162), 29 states have call successors, (63), 16 states have call predecessors, (63), 15 states have return successors, (62), 28 states have call predecessors, (62), 28 states have call successors, (62) [2022-11-23 03:37:41,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1277 states and 1507 transitions. [2022-11-23 03:37:41,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2022-11-23 03:37:41,456 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:37:41,456 INFO L195 NwaCegarLoop]: trace histogram [64, 63, 63, 28, 27, 27, 27, 27, 27, 27, 26, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:37:41,467 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-23 03:37:41,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2022-11-23 03:37:41,667 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:37:41,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:37:41,668 INFO L85 PathProgramCache]: Analyzing trace with hash -743933806, now seen corresponding path program 3 times [2022-11-23 03:37:41,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:37:41,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254481277] [2022-11-23 03:37:41,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:37:41,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:37:41,686 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 03:37:41,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [464535707] [2022-11-23 03:37:41,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:37:41,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:37:41,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:37:41,688 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:37:41,693 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-23 03:37:43,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2022-11-23 03:37:43,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:37:43,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-23 03:37:43,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:37:43,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10116 backedges. 2486 proven. 0 refuted. 0 times theorem prover too weak. 7630 trivial. 0 not checked. [2022-11-23 03:37:43,831 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-23 03:37:43,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:37:43,831 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254481277] [2022-11-23 03:37:43,831 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 03:37:43,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464535707] [2022-11-23 03:37:43,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464535707] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 03:37:43,832 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 03:37:43,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 03:37:43,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290845413] [2022-11-23 03:37:43,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 03:37:43,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 03:37:43,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:37:43,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 03:37:43,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-11-23 03:37:43,834 INFO L87 Difference]: Start difference. First operand 1277 states and 1507 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-23 03:37:45,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:37:45,005 INFO L93 Difference]: Finished difference Result 2101 states and 2551 transitions. [2022-11-23 03:37:45,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:37:45,006 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) Word has length 440 [2022-11-23 03:37:45,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:37:45,011 INFO L225 Difference]: With dead ends: 2101 [2022-11-23 03:37:45,012 INFO L226 Difference]: Without dead ends: 1482 [2022-11-23 03:37:45,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 435 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 03:37:45,014 INFO L413 NwaCegarLoop]: 56 mSDtfsCounter, 15 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:37:45,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 122 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:37:45,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2022-11-23 03:37:45,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1143. [2022-11-23 03:37:45,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1143 states, 780 states have (on average 1.0974358974358975) internal successors, (856), 806 states have internal predecessors, (856), 219 states have call successors, (219), 143 states have call predecessors, (219), 143 states have return successors, (218), 193 states have call predecessors, (218), 218 states have call successors, (218) [2022-11-23 03:37:45,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1143 states to 1143 states and 1293 transitions. [2022-11-23 03:37:45,821 INFO L78 Accepts]: Start accepts. Automaton has 1143 states and 1293 transitions. Word has length 440 [2022-11-23 03:37:45,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:37:45,822 INFO L495 AbstractCegarLoop]: Abstraction has 1143 states and 1293 transitions. [2022-11-23 03:37:45,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 6 states have internal predecessors, (28), 4 states have call successors, (14), 2 states have call predecessors, (14), 2 states have return successors, (13), 4 states have call predecessors, (13), 4 states have call successors, (13) [2022-11-23 03:37:45,822 INFO L276 IsEmpty]: Start isEmpty. Operand 1143 states and 1293 transitions. [2022-11-23 03:37:45,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 445 [2022-11-23 03:37:45,834 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:37:45,834 INFO L195 NwaCegarLoop]: trace histogram [65, 64, 64, 27, 26, 26, 26, 26, 26, 26, 26, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:37:45,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-23 03:37:46,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:37:46,043 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:37:46,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:37:46,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1525085741, now seen corresponding path program 1 times [2022-11-23 03:37:46,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:37:46,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521445519] [2022-11-23 03:37:46,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:37:46,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:37:46,064 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 03:37:46,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1730566575] [2022-11-23 03:37:46,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:37:46,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:37:46,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:37:46,066 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:37:46,069 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-23 03:37:46,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 03:37:46,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 1071 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-23 03:37:46,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:37:47,432 INFO L134 CoverageAnalysis]: Checked inductivity of 10230 backedges. 128 proven. 9950 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2022-11-23 03:37:47,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:37:49,394 INFO L134 CoverageAnalysis]: Checked inductivity of 10230 backedges. 128 proven. 2038 refuted. 0 times theorem prover too weak. 8064 trivial. 0 not checked. [2022-11-23 03:37:49,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:37:49,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521445519] [2022-11-23 03:37:49,395 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 03:37:49,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730566575] [2022-11-23 03:37:49,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730566575] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:37:49,395 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:37:49,396 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34] total 66 [2022-11-23 03:37:49,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584685712] [2022-11-23 03:37:49,396 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:37:49,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-11-23 03:37:49,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:37:49,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-11-23 03:37:49,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2021, Invalid=2269, Unknown=0, NotChecked=0, Total=4290 [2022-11-23 03:37:49,405 INFO L87 Difference]: Start difference. First operand 1143 states and 1293 transitions. Second operand has 66 states, 66 states have (on average 5.090909090909091) internal successors, (336), 66 states have internal predecessors, (336), 61 states have call successors, (129), 32 states have call predecessors, (129), 31 states have return successors, (128), 60 states have call predecessors, (128), 60 states have call successors, (128) [2022-11-23 03:37:56,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:37:56,415 INFO L93 Difference]: Finished difference Result 2469 states and 2907 transitions. [2022-11-23 03:37:56,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-11-23 03:37:56,415 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 5.090909090909091) internal successors, (336), 66 states have internal predecessors, (336), 61 states have call successors, (129), 32 states have call predecessors, (129), 31 states have return successors, (128), 60 states have call predecessors, (128), 60 states have call successors, (128) Word has length 444 [2022-11-23 03:37:56,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:37:56,424 INFO L225 Difference]: With dead ends: 2469 [2022-11-23 03:37:56,424 INFO L226 Difference]: Without dead ends: 2456 [2022-11-23 03:37:56,429 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 943 GetRequests, 822 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2122 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5468, Invalid=9538, Unknown=0, NotChecked=0, Total=15006 [2022-11-23 03:37:56,430 INFO L413 NwaCegarLoop]: 325 mSDtfsCounter, 2478 mSDsluCounter, 951 mSDsCounter, 0 mSdLazyCounter, 1472 mSolverCounterSat, 2094 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2478 SdHoareTripleChecker+Valid, 1276 SdHoareTripleChecker+Invalid, 3566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2094 IncrementalHoareTripleChecker+Valid, 1472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-11-23 03:37:56,430 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2478 Valid, 1276 Invalid, 3566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2094 Valid, 1472 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-11-23 03:37:56,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2456 states. [2022-11-23 03:37:58,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2456 to 2455. [2022-11-23 03:37:58,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2455 states, 1676 states have (on average 1.1026252983293556) internal successors, (1848), 1734 states have internal predecessors, (1848), 475 states have call successors, (475), 303 states have call predecessors, (475), 303 states have return successors, (474), 417 states have call predecessors, (474), 474 states have call successors, (474) [2022-11-23 03:37:58,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2455 states to 2455 states and 2797 transitions. [2022-11-23 03:37:58,208 INFO L78 Accepts]: Start accepts. Automaton has 2455 states and 2797 transitions. Word has length 444 [2022-11-23 03:37:58,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:37:58,210 INFO L495 AbstractCegarLoop]: Abstraction has 2455 states and 2797 transitions. [2022-11-23 03:37:58,210 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 5.090909090909091) internal successors, (336), 66 states have internal predecessors, (336), 61 states have call successors, (129), 32 states have call predecessors, (129), 31 states have return successors, (128), 60 states have call predecessors, (128), 60 states have call successors, (128) [2022-11-23 03:37:58,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2455 states and 2797 transitions. [2022-11-23 03:37:58,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 893 [2022-11-23 03:37:58,233 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:37:58,233 INFO L195 NwaCegarLoop]: trace histogram [129, 128, 128, 59, 58, 58, 58, 58, 58, 58, 58, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:37:58,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-23 03:37:58,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:37:58,441 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:37:58,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:37:58,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1844250541, now seen corresponding path program 2 times [2022-11-23 03:37:58,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:37:58,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564027730] [2022-11-23 03:37:58,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:37:58,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:37:58,487 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 03:37:58,488 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [267680146] [2022-11-23 03:37:58,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-23 03:37:58,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:37:58,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:37:58,490 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:37:58,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-23 03:37:58,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-23 03:37:58,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:37:58,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 2127 conjuncts, 127 conjunts are in the unsatisfiable core [2022-11-23 03:37:58,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:38:01,903 INFO L134 CoverageAnalysis]: Checked inductivity of 42838 backedges. 256 proven. 42302 refuted. 0 times theorem prover too weak. 280 trivial. 0 not checked. [2022-11-23 03:38:01,903 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:38:06,565 INFO L134 CoverageAnalysis]: Checked inductivity of 42838 backedges. 256 proven. 10070 refuted. 0 times theorem prover too weak. 32512 trivial. 0 not checked. [2022-11-23 03:38:06,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:38:06,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564027730] [2022-11-23 03:38:06,566 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 03:38:06,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267680146] [2022-11-23 03:38:06,566 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267680146] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:38:06,566 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:38:06,567 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 66] total 104 [2022-11-23 03:38:06,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608794766] [2022-11-23 03:38:06,567 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:38:06,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-11-23 03:38:06,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:38:06,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-11-23 03:38:06,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5156, Invalid=5556, Unknown=0, NotChecked=0, Total=10712 [2022-11-23 03:38:06,575 INFO L87 Difference]: Start difference. First operand 2455 states and 2797 transitions. Second operand has 104 states, 104 states have (on average 5.8076923076923075) internal successors, (604), 104 states have internal predecessors, (604), 100 states have call successors, (257), 64 states have call predecessors, (257), 63 states have return successors, (256), 99 states have call predecessors, (256), 99 states have call successors, (256) [2022-11-23 03:38:21,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:38:21,877 INFO L93 Difference]: Finished difference Result 4027 states and 4711 transitions. [2022-11-23 03:38:21,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2022-11-23 03:38:21,878 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 5.8076923076923075) internal successors, (604), 104 states have internal predecessors, (604), 100 states have call successors, (257), 64 states have call predecessors, (257), 63 states have return successors, (256), 99 states have call predecessors, (256), 99 states have call successors, (256) Word has length 892 [2022-11-23 03:38:21,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:38:21,891 INFO L225 Difference]: With dead ends: 4027 [2022-11-23 03:38:21,891 INFO L226 Difference]: Without dead ends: 4014 [2022-11-23 03:38:21,899 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1877 GetRequests, 1654 SyntacticMatches, 26 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6543 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=14525, Invalid=24877, Unknown=0, NotChecked=0, Total=39402 [2022-11-23 03:38:21,900 INFO L413 NwaCegarLoop]: 515 mSDtfsCounter, 4339 mSDsluCounter, 1545 mSDsCounter, 0 mSdLazyCounter, 2404 mSolverCounterSat, 3624 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4339 SdHoareTripleChecker+Valid, 2060 SdHoareTripleChecker+Invalid, 6028 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3624 IncrementalHoareTripleChecker+Valid, 2404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-11-23 03:38:21,900 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4339 Valid, 2060 Invalid, 6028 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3624 Valid, 2404 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-11-23 03:38:21,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4014 states. [2022-11-23 03:38:24,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4014 to 4013. [2022-11-23 03:38:24,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4013 states, 2740 states have (on average 1.1043795620437957) internal successors, (3026), 2836 states have internal predecessors, (3026), 779 states have call successors, (779), 493 states have call predecessors, (779), 493 states have return successors, (778), 683 states have call predecessors, (778), 778 states have call successors, (778) [2022-11-23 03:38:24,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4013 states to 4013 states and 4583 transitions. [2022-11-23 03:38:24,135 INFO L78 Accepts]: Start accepts. Automaton has 4013 states and 4583 transitions. Word has length 892 [2022-11-23 03:38:24,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:38:24,137 INFO L495 AbstractCegarLoop]: Abstraction has 4013 states and 4583 transitions. [2022-11-23 03:38:24,138 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 5.8076923076923075) internal successors, (604), 104 states have internal predecessors, (604), 100 states have call successors, (257), 64 states have call predecessors, (257), 63 states have return successors, (256), 99 states have call predecessors, (256), 99 states have call successors, (256) [2022-11-23 03:38:24,138 INFO L276 IsEmpty]: Start isEmpty. Operand 4013 states and 4583 transitions. [2022-11-23 03:38:24,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1425 [2022-11-23 03:38:24,184 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:38:24,185 INFO L195 NwaCegarLoop]: trace histogram [205, 204, 204, 97, 96, 96, 96, 96, 96, 96, 96, 4, 4, 4, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:38:24,195 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-23 03:38:24,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2022-11-23 03:38:24,394 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:38:24,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:38:24,395 INFO L85 PathProgramCache]: Analyzing trace with hash -458177931, now seen corresponding path program 3 times [2022-11-23 03:38:24,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:38:24,395 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432790429] [2022-11-23 03:38:24,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:38:24,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:38:24,479 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 03:38:24,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953096723] [2022-11-23 03:38:24,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-23 03:38:24,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:38:24,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:38:24,481 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:38:24,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-23 03:38:53,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 68 check-sat command(s) [2022-11-23 03:38:53,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-23 03:38:53,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 1656 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-23 03:38:53,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-23 03:38:53,906 INFO L134 CoverageAnalysis]: Checked inductivity of 110820 backedges. 16887 proven. 69 refuted. 0 times theorem prover too weak. 93864 trivial. 0 not checked. [2022-11-23 03:38:53,906 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-23 03:38:54,765 INFO L134 CoverageAnalysis]: Checked inductivity of 110820 backedges. 2535 proven. 69 refuted. 0 times theorem prover too weak. 108216 trivial. 0 not checked. [2022-11-23 03:38:54,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-23 03:38:54,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432790429] [2022-11-23 03:38:54,766 WARN L310 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2022-11-23 03:38:54,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953096723] [2022-11-23 03:38:54,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953096723] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-23 03:38:54,766 INFO L184 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2022-11-23 03:38:54,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2022-11-23 03:38:54,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460010347] [2022-11-23 03:38:54,767 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2022-11-23 03:38:54,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-11-23 03:38:54,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-23 03:38:54,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-11-23 03:38:54,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-23 03:38:54,770 INFO L87 Difference]: Start difference. First operand 4013 states and 4583 transitions. Second operand has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 8 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 8 states have call predecessors, (39), 8 states have call successors, (39) [2022-11-23 03:38:57,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 03:38:57,093 INFO L93 Difference]: Finished difference Result 5604 states and 6367 transitions. [2022-11-23 03:38:57,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 03:38:57,097 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 8 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 8 states have call predecessors, (39), 8 states have call successors, (39) Word has length 1424 [2022-11-23 03:38:57,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 03:38:57,112 INFO L225 Difference]: With dead ends: 5604 [2022-11-23 03:38:57,112 INFO L226 Difference]: Without dead ends: 3990 [2022-11-23 03:38:57,118 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2846 GetRequests, 2837 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2022-11-23 03:38:57,119 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 3 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 138 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 03:38:57,119 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 247 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 138 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 03:38:57,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3990 states. [2022-11-23 03:38:59,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3990 to 3990. [2022-11-23 03:38:59,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3990 states, 2724 states have (on average 1.1042584434654918) internal successors, (3008), 2819 states have internal predecessors, (3008), 774 states have call successors, (774), 491 states have call predecessors, (774), 491 states have return successors, (773), 679 states have call predecessors, (773), 773 states have call successors, (773) [2022-11-23 03:38:59,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3990 states to 3990 states and 4555 transitions. [2022-11-23 03:38:59,285 INFO L78 Accepts]: Start accepts. Automaton has 3990 states and 4555 transitions. Word has length 1424 [2022-11-23 03:38:59,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 03:38:59,286 INFO L495 AbstractCegarLoop]: Abstraction has 3990 states and 4555 transitions. [2022-11-23 03:38:59,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 7.0) internal successors, (63), 9 states have internal predecessors, (63), 8 states have call successors, (40), 2 states have call predecessors, (40), 2 states have return successors, (39), 8 states have call predecessors, (39), 8 states have call successors, (39) [2022-11-23 03:38:59,286 INFO L276 IsEmpty]: Start isEmpty. Operand 3990 states and 4555 transitions. [2022-11-23 03:38:59,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1429 [2022-11-23 03:38:59,318 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 03:38:59,319 INFO L195 NwaCegarLoop]: trace histogram [206, 205, 205, 96, 95, 95, 95, 95, 95, 95, 95, 5, 5, 5, 5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 03:38:59,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-23 03:38:59,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:38:59,527 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-23 03:38:59,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 03:38:59,528 INFO L85 PathProgramCache]: Analyzing trace with hash -296047278, now seen corresponding path program 4 times [2022-11-23 03:38:59,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-23 03:38:59,528 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [671795220] [2022-11-23 03:38:59,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 03:38:59,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 03:38:59,588 ERROR L245 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2022-11-23 03:38:59,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1052122827] [2022-11-23 03:38:59,589 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-23 03:38:59,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-23 03:38:59,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 [2022-11-23 03:38:59,590 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-23 03:38:59,617 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_562e5de4-ab9e-4458-a3cb-36ff2375ee08/bin/uautomizer-QkZJyEgLgS/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process