./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-30.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc 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_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-30.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --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 9a12fb13f4579599874276f15d887898a52c4d97dbae858ff08fc2462341b39d --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:43:37,086 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:43:37,186 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:43:37,190 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:43:37,191 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:43:37,215 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:43:37,215 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:43:37,216 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:43:37,216 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:43:37,217 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:43:37,217 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:43:37,218 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:43:37,219 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:43:37,219 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:43:37,220 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:43:37,220 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:43:37,221 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:43:37,221 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:43:37,222 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:43:37,222 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:43:37,222 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:43:37,223 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:43:37,223 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:43:37,224 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:43:37,224 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:43:37,224 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:43:37,225 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:43:37,225 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:43:37,225 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:43:37,226 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:43:37,226 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:43:37,227 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:43:37,227 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:43:37,227 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:43:37,227 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:43:37,227 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:43:37,228 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:43:37,228 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:43:37,228 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:43:37,228 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:43:37,228 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:43:37,229 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:43:37,229 INFO L153 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_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9a12fb13f4579599874276f15d887898a52c4d97dbae858ff08fc2462341b39d [2023-11-29 02:43:37,449 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:43:37,490 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:43:37,493 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:43:37,494 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:43:37,494 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:43:37,495 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-30.i [2023-11-29 02:43:40,155 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:43:40,417 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:43:40,418 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-30.i [2023-11-29 02:43:40,432 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/data/90c54a38d/ad0a986e1dab46888b7226829e7ad76b/FLAGb8efa7d81 [2023-11-29 02:43:40,446 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/data/90c54a38d/ad0a986e1dab46888b7226829e7ad76b [2023-11-29 02:43:40,449 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:43:40,450 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:43:40,452 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:43:40,452 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:43:40,457 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:43:40,457 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:43:40" (1/1) ... [2023-11-29 02:43:40,458 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e292659 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:40, skipping insertion in model container [2023-11-29 02:43:40,459 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:43:40" (1/1) ... [2023-11-29 02:43:40,519 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:43:40,670 WARN L240 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_d915e820-163a-455b-bd00-8a65209d0654/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-30.i[916,929] [2023-11-29 02:43:40,908 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:43:40,925 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:43:40,938 WARN L240 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_d915e820-163a-455b-bd00-8a65209d0654/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-30.i[916,929] [2023-11-29 02:43:41,062 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:43:41,083 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:43:41,083 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:41 WrapperNode [2023-11-29 02:43:41,083 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:43:41,085 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:43:41,085 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:43:41,085 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:43:41,093 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:41" (1/1) ... [2023-11-29 02:43:41,120 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:41" (1/1) ... [2023-11-29 02:43:41,237 INFO L138 Inliner]: procedures = 26, calls = 98, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 757 [2023-11-29 02:43:41,238 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:43:41,239 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:43:41,239 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:43:41,239 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:43:41,251 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:41" (1/1) ... [2023-11-29 02:43:41,251 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:41" (1/1) ... [2023-11-29 02:43:41,272 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:41" (1/1) ... [2023-11-29 02:43:41,359 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 02:43:41,359 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:41" (1/1) ... [2023-11-29 02:43:41,360 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:41" (1/1) ... [2023-11-29 02:43:41,398 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:41" (1/1) ... [2023-11-29 02:43:41,417 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:41" (1/1) ... [2023-11-29 02:43:41,436 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:41" (1/1) ... [2023-11-29 02:43:41,447 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:41" (1/1) ... [2023-11-29 02:43:41,465 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:43:41,466 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:43:41,466 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:43:41,466 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:43:41,467 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:41" (1/1) ... [2023-11-29 02:43:41,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:43:41,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:43:41,489 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:43:41,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:43:41,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:43:41,525 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 02:43:41,525 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 02:43:41,525 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:43:41,526 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:43:41,526 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:43:41,654 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:43:41,656 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:43:42,696 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:43:42,765 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:43:42,765 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 02:43:42,766 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:43:42 BoogieIcfgContainer [2023-11-29 02:43:42,766 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:43:42,769 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:43:42,769 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:43:42,772 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:43:42,772 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:43:40" (1/3) ... [2023-11-29 02:43:42,773 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d16665c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:43:42, skipping insertion in model container [2023-11-29 02:43:42,773 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:43:41" (2/3) ... [2023-11-29 02:43:42,774 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d16665c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:43:42, skipping insertion in model container [2023-11-29 02:43:42,774 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:43:42" (3/3) ... [2023-11-29 02:43:42,775 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-30.i [2023-11-29 02:43:42,793 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:43:42,794 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:43:42,850 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:43:42,856 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=LoopHeads, 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;@61acdff3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:43:42,857 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 02:43:42,863 INFO L276 IsEmpty]: Start isEmpty. Operand has 292 states, 204 states have (on average 1.5441176470588236) internal successors, (315), 205 states have internal predecessors, (315), 85 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2023-11-29 02:43:42,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2023-11-29 02:43:42,898 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:43:42,899 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:42,900 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:43:42,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:42,905 INFO L85 PathProgramCache]: Analyzing trace with hash -2098541843, now seen corresponding path program 1 times [2023-11-29 02:43:42,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:42,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881129694] [2023-11-29 02:43:42,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:42,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:43,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:43,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:43,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881129694] [2023-11-29 02:43:43,287 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 02:43:43,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206103223] [2023-11-29 02:43:43,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:43,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:43:43,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:43:43,291 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:43:43,296 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:43:43,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:43,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 1399 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 02:43:43,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:43:43,888 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 14112 trivial. 0 not checked. [2023-11-29 02:43:43,888 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:43:43,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206103223] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:43:43,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:43:43,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:43:43,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794111686] [2023-11-29 02:43:43,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:43:43,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 02:43:43,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:43,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 02:43:43,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:43:43,931 INFO L87 Difference]: Start difference. First operand has 292 states, 204 states have (on average 1.5441176470588236) internal successors, (315), 205 states have internal predecessors, (315), 85 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) Second operand has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (85), 2 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 2 states have call successors, (85) [2023-11-29 02:43:44,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:43:44,021 INFO L93 Difference]: Finished difference Result 581 states and 1053 transitions. [2023-11-29 02:43:44,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 02:43:44,025 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (85), 2 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 2 states have call successors, (85) Word has length 559 [2023-11-29 02:43:44,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:43:44,037 INFO L225 Difference]: With dead ends: 581 [2023-11-29 02:43:44,038 INFO L226 Difference]: Without dead ends: 290 [2023-11-29 02:43:44,045 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 558 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 02:43:44,049 INFO L413 NwaCegarLoop]: 477 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:43:44,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 477 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:43:44,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-11-29 02:43:44,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2023-11-29 02:43:44,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 203 states have (on average 1.5270935960591132) internal successors, (310), 203 states have internal predecessors, (310), 85 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2023-11-29 02:43:44,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 480 transitions. [2023-11-29 02:43:44,133 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 480 transitions. Word has length 559 [2023-11-29 02:43:44,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:43:44,134 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 480 transitions. [2023-11-29 02:43:44,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 69.5) internal successors, (139), 2 states have internal predecessors, (139), 2 states have call successors, (85), 2 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 2 states have call successors, (85) [2023-11-29 02:43:44,135 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 480 transitions. [2023-11-29 02:43:44,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2023-11-29 02:43:44,154 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:43:44,154 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:44,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:43:44,355 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 02:43:44,355 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:43:44,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:44,356 INFO L85 PathProgramCache]: Analyzing trace with hash 1401906399, now seen corresponding path program 1 times [2023-11-29 02:43:44,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:44,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461911814] [2023-11-29 02:43:44,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:44,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:44,501 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:43:44,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1903489175] [2023-11-29 02:43:44,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:44,502 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:43:44,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:43:44,504 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:43:44,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:43:44,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:44,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 1399 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:43:44,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:43:45,609 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 2464 proven. 0 refuted. 0 times theorem prover too weak. 11816 trivial. 0 not checked. [2023-11-29 02:43:45,610 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:43:45,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:45,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461911814] [2023-11-29 02:43:45,610 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:43:45,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903489175] [2023-11-29 02:43:45,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903489175] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:43:45,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:43:45,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:43:45,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040526907] [2023-11-29 02:43:45,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:43:45,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:43:45,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:45,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:43:45,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:43:45,615 INFO L87 Difference]: Start difference. First operand 290 states and 480 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 2 states have call successors, (85), 2 states have call predecessors, (85), 2 states have return successors, (85), 2 states have call predecessors, (85), 2 states have call successors, (85) [2023-11-29 02:43:45,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:43:45,702 INFO L93 Difference]: Finished difference Result 579 states and 959 transitions. [2023-11-29 02:43:45,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:43:45,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 2 states have call successors, (85), 2 states have call predecessors, (85), 2 states have return successors, (85), 2 states have call predecessors, (85), 2 states have call successors, (85) Word has length 559 [2023-11-29 02:43:45,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:43:45,710 INFO L225 Difference]: With dead ends: 579 [2023-11-29 02:43:45,710 INFO L226 Difference]: Without dead ends: 290 [2023-11-29 02:43:45,713 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 557 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:43:45,715 INFO L413 NwaCegarLoop]: 462 mSDtfsCounter, 257 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:43:45,716 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [257 Valid, 462 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:43:45,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2023-11-29 02:43:45,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2023-11-29 02:43:45,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 203 states have (on average 1.522167487684729) internal successors, (309), 203 states have internal predecessors, (309), 85 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2023-11-29 02:43:45,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 479 transitions. [2023-11-29 02:43:45,779 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 479 transitions. Word has length 559 [2023-11-29 02:43:45,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:43:45,782 INFO L495 AbstractCegarLoop]: Abstraction has 290 states and 479 transitions. [2023-11-29 02:43:45,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 2 states have call successors, (85), 2 states have call predecessors, (85), 2 states have return successors, (85), 2 states have call predecessors, (85), 2 states have call successors, (85) [2023-11-29 02:43:45,783 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 479 transitions. [2023-11-29 02:43:45,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2023-11-29 02:43:45,787 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:43:45,788 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:45,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 02:43:45,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2023-11-29 02:43:45,989 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:43:45,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:45,989 INFO L85 PathProgramCache]: Analyzing trace with hash -284273439, now seen corresponding path program 1 times [2023-11-29 02:43:45,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:45,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17987970] [2023-11-29 02:43:45,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:45,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:46,070 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:43:46,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587999591] [2023-11-29 02:43:46,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:46,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:43:46,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:43:46,072 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:43:46,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:43:46,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:46,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 1399 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:43:46,494 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:43:46,602 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-29 02:43:46,602 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:43:46,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:46,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17987970] [2023-11-29 02:43:46,603 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:43:46,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587999591] [2023-11-29 02:43:46,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587999591] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:43:46,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:43:46,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:43:46,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803392429] [2023-11-29 02:43:46,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:43:46,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:43:46,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:46,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:43:46,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:43:46,607 INFO L87 Difference]: Start difference. First operand 290 states and 479 transitions. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 02:43:46,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:43:46,726 INFO L93 Difference]: Finished difference Result 867 states and 1433 transitions. [2023-11-29 02:43:46,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:43:46,727 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 559 [2023-11-29 02:43:46,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:43:46,735 INFO L225 Difference]: With dead ends: 867 [2023-11-29 02:43:46,735 INFO L226 Difference]: Without dead ends: 578 [2023-11-29 02:43:46,736 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 557 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:43:46,738 INFO L413 NwaCegarLoop]: 863 mSDtfsCounter, 441 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 441 SdHoareTripleChecker+Valid, 1326 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:43:46,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [441 Valid, 1326 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:43:46,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2023-11-29 02:43:46,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 575. [2023-11-29 02:43:46,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 402 states have (on average 1.5174129353233832) internal successors, (610), 402 states have internal predecessors, (610), 170 states have call successors, (170), 2 states have call predecessors, (170), 2 states have return successors, (170), 170 states have call predecessors, (170), 170 states have call successors, (170) [2023-11-29 02:43:46,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 950 transitions. [2023-11-29 02:43:46,845 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 950 transitions. Word has length 559 [2023-11-29 02:43:46,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:43:46,847 INFO L495 AbstractCegarLoop]: Abstraction has 575 states and 950 transitions. [2023-11-29 02:43:46,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 02:43:46,848 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 950 transitions. [2023-11-29 02:43:46,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2023-11-29 02:43:46,853 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:43:46,854 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:46,863 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:43:47,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:43:47,055 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:43:47,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:47,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1449831011, now seen corresponding path program 1 times [2023-11-29 02:43:47,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:47,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753196796] [2023-11-29 02:43:47,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:47,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:47,132 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:43:47,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2003239291] [2023-11-29 02:43:47,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:47,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:43:47,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:43:47,133 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:43:47,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:43:47,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:47,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 1400 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:43:47,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:43:47,640 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-29 02:43:47,640 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:43:47,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:47,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753196796] [2023-11-29 02:43:47,640 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:43:47,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003239291] [2023-11-29 02:43:47,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003239291] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:43:47,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:43:47,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:43:47,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241262113] [2023-11-29 02:43:47,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:43:47,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:43:47,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:47,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:43:47,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:43:47,645 INFO L87 Difference]: Start difference. First operand 575 states and 950 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 02:43:47,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:43:47,882 INFO L93 Difference]: Finished difference Result 1428 states and 2347 transitions. [2023-11-29 02:43:47,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:43:47,883 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 559 [2023-11-29 02:43:47,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:43:47,890 INFO L225 Difference]: With dead ends: 1428 [2023-11-29 02:43:47,891 INFO L226 Difference]: Without dead ends: 854 [2023-11-29 02:43:47,893 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 560 GetRequests, 557 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:43:47,894 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 588 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 1185 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:43:47,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [588 Valid, 1185 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:43:47,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2023-11-29 02:43:48,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 630. [2023-11-29 02:43:48,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 630 states, 455 states have (on average 1.531868131868132) internal successors, (697), 455 states have internal predecessors, (697), 170 states have call successors, (170), 4 states have call predecessors, (170), 4 states have return successors, (170), 170 states have call predecessors, (170), 170 states have call successors, (170) [2023-11-29 02:43:48,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 630 states to 630 states and 1037 transitions. [2023-11-29 02:43:48,018 INFO L78 Accepts]: Start accepts. Automaton has 630 states and 1037 transitions. Word has length 559 [2023-11-29 02:43:48,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:43:48,020 INFO L495 AbstractCegarLoop]: Abstraction has 630 states and 1037 transitions. [2023-11-29 02:43:48,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 02:43:48,020 INFO L276 IsEmpty]: Start isEmpty. Operand 630 states and 1037 transitions. [2023-11-29 02:43:48,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 560 [2023-11-29 02:43:48,029 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:43:48,029 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:48,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:43:48,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:43:48,230 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:43:48,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:48,231 INFO L85 PathProgramCache]: Analyzing trace with hash 1201684517, now seen corresponding path program 1 times [2023-11-29 02:43:48,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:48,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426311934] [2023-11-29 02:43:48,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:48,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:48,317 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:43:48,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [511355468] [2023-11-29 02:43:48,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:48,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:43:48,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:43:48,319 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:43:48,321 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:43:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:48,724 INFO L262 TraceCheckSpWp]: Trace formula consists of 1399 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:43:48,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:43:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-29 02:43:48,810 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:43:48,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:48,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426311934] [2023-11-29 02:43:48,811 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:43:48,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511355468] [2023-11-29 02:43:48,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511355468] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:43:48,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:43:48,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:43:48,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523746184] [2023-11-29 02:43:48,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:43:48,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:43:48,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:48,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:43:48,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:43:48,815 INFO L87 Difference]: Start difference. First operand 630 states and 1037 transitions. Second operand has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 02:43:48,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:43:48,964 INFO L93 Difference]: Finished difference Result 1265 states and 2081 transitions. [2023-11-29 02:43:48,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:43:48,965 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 559 [2023-11-29 02:43:48,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:43:48,971 INFO L225 Difference]: With dead ends: 1265 [2023-11-29 02:43:48,971 INFO L226 Difference]: Without dead ends: 636 [2023-11-29 02:43:48,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 556 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:43:48,974 INFO L413 NwaCegarLoop]: 696 mSDtfsCounter, 554 mSDsluCounter, 1048 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 554 SdHoareTripleChecker+Valid, 1744 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:43:48,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [554 Valid, 1744 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:43:48,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2023-11-29 02:43:49,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 633. [2023-11-29 02:43:49,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 458 states have (on average 1.517467248908297) internal successors, (695), 458 states have internal predecessors, (695), 170 states have call successors, (170), 4 states have call predecessors, (170), 4 states have return successors, (170), 170 states have call predecessors, (170), 170 states have call successors, (170) [2023-11-29 02:43:49,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1035 transitions. [2023-11-29 02:43:49,080 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1035 transitions. Word has length 559 [2023-11-29 02:43:49,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:43:49,081 INFO L495 AbstractCegarLoop]: Abstraction has 633 states and 1035 transitions. [2023-11-29 02:43:49,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.25) internal successors, (137), 4 states have internal predecessors, (137), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 02:43:49,081 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1035 transitions. [2023-11-29 02:43:49,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2023-11-29 02:43:49,085 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:43:49,085 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:49,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 02:43:49,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:43:49,286 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:43:49,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:49,287 INFO L85 PathProgramCache]: Analyzing trace with hash 682902218, now seen corresponding path program 1 times [2023-11-29 02:43:49,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:49,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1410632289] [2023-11-29 02:43:49,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:49,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:49,363 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:43:49,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [177129947] [2023-11-29 02:43:49,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:49,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:43:49,364 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:43:49,368 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:43:49,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:43:49,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:49,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 1398 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:43:49,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:43:50,329 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 5584 proven. 186 refuted. 0 times theorem prover too weak. 8510 trivial. 0 not checked. [2023-11-29 02:43:50,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:43:50,853 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 66 proven. 186 refuted. 0 times theorem prover too weak. 14028 trivial. 0 not checked. [2023-11-29 02:43:50,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:50,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1410632289] [2023-11-29 02:43:50,853 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:43:50,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177129947] [2023-11-29 02:43:50,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177129947] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:43:50,854 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:43:50,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 02:43:50,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584351933] [2023-11-29 02:43:50,854 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:43:50,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:43:50,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:50,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:43:50,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:43:50,858 INFO L87 Difference]: Start difference. First operand 633 states and 1035 transitions. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 2 states have call successors, (147), 2 states have call predecessors, (147), 4 states have return successors, (148), 2 states have call predecessors, (148), 2 states have call successors, (148) [2023-11-29 02:43:51,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:43:51,420 INFO L93 Difference]: Finished difference Result 1271 states and 2065 transitions. [2023-11-29 02:43:51,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:43:51,421 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 2 states have call successors, (147), 2 states have call predecessors, (147), 4 states have return successors, (148), 2 states have call predecessors, (148), 2 states have call successors, (148) Word has length 560 [2023-11-29 02:43:51,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:43:51,426 INFO L225 Difference]: With dead ends: 1271 [2023-11-29 02:43:51,426 INFO L226 Difference]: Without dead ends: 639 [2023-11-29 02:43:51,428 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1122 GetRequests, 1112 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:43:51,428 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 263 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 922 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:43:51,429 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 922 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:43:51,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 639 states. [2023-11-29 02:43:51,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 639 to 631. [2023-11-29 02:43:51,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 631 states, 454 states have (on average 1.4823788546255507) internal successors, (673), 454 states have internal predecessors, (673), 170 states have call successors, (170), 6 states have call predecessors, (170), 6 states have return successors, (170), 170 states have call predecessors, (170), 170 states have call successors, (170) [2023-11-29 02:43:51,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 631 states to 631 states and 1013 transitions. [2023-11-29 02:43:51,482 INFO L78 Accepts]: Start accepts. Automaton has 631 states and 1013 transitions. Word has length 560 [2023-11-29 02:43:51,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:43:51,483 INFO L495 AbstractCegarLoop]: Abstraction has 631 states and 1013 transitions. [2023-11-29 02:43:51,484 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 2 states have call successors, (147), 2 states have call predecessors, (147), 4 states have return successors, (148), 2 states have call predecessors, (148), 2 states have call successors, (148) [2023-11-29 02:43:51,484 INFO L276 IsEmpty]: Start isEmpty. Operand 631 states and 1013 transitions. [2023-11-29 02:43:51,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2023-11-29 02:43:51,487 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:43:51,488 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:51,495 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:43:51,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 02:43:51,689 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:43:51,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:51,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1003277620, now seen corresponding path program 1 times [2023-11-29 02:43:51,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:51,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292625658] [2023-11-29 02:43:51,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:51,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:51,770 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:43:51,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [658129397] [2023-11-29 02:43:51,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:51,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:43:51,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:43:51,772 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:43:51,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:43:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:52,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:43:52,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:43:52,794 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 4254 proven. 207 refuted. 0 times theorem prover too weak. 9819 trivial. 0 not checked. [2023-11-29 02:43:52,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:43:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 45 proven. 207 refuted. 0 times theorem prover too weak. 14028 trivial. 0 not checked. [2023-11-29 02:43:53,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:53,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292625658] [2023-11-29 02:43:53,295 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:43:53,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658129397] [2023-11-29 02:43:53,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [658129397] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:43:53,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:43:53,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 02:43:53,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452218849] [2023-11-29 02:43:53,296 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:43:53,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:43:53,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:53,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:43:53,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:43:53,299 INFO L87 Difference]: Start difference. First operand 631 states and 1013 transitions. Second operand has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 2 states have call successors, (154), 2 states have call predecessors, (154), 4 states have return successors, (155), 2 states have call predecessors, (155), 2 states have call successors, (155) [2023-11-29 02:43:53,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:43:53,825 INFO L93 Difference]: Finished difference Result 1281 states and 2043 transitions. [2023-11-29 02:43:53,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:43:53,827 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 2 states have call successors, (154), 2 states have call predecessors, (154), 4 states have return successors, (155), 2 states have call predecessors, (155), 2 states have call successors, (155) Word has length 560 [2023-11-29 02:43:53,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:43:53,833 INFO L225 Difference]: With dead ends: 1281 [2023-11-29 02:43:53,833 INFO L226 Difference]: Without dead ends: 606 [2023-11-29 02:43:53,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1122 GetRequests, 1112 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:43:53,836 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 434 mSDsluCounter, 560 mSDsCounter, 0 mSdLazyCounter, 476 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 448 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:43:53,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [448 Valid, 926 Invalid, 512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 476 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:43:53,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 606 states. [2023-11-29 02:43:53,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 606 to 594. [2023-11-29 02:43:53,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 415 states have (on average 1.4506024096385541) internal successors, (602), 415 states have internal predecessors, (602), 170 states have call successors, (170), 8 states have call predecessors, (170), 8 states have return successors, (170), 170 states have call predecessors, (170), 170 states have call successors, (170) [2023-11-29 02:43:53,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 942 transitions. [2023-11-29 02:43:53,925 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 942 transitions. Word has length 560 [2023-11-29 02:43:53,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:43:53,926 INFO L495 AbstractCegarLoop]: Abstraction has 594 states and 942 transitions. [2023-11-29 02:43:53,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.0) internal successors, (147), 7 states have internal predecessors, (147), 2 states have call successors, (154), 2 states have call predecessors, (154), 4 states have return successors, (155), 2 states have call predecessors, (155), 2 states have call successors, (155) [2023-11-29 02:43:53,927 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 942 transitions. [2023-11-29 02:43:53,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 561 [2023-11-29 02:43:53,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:43:53,932 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:53,941 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 02:43:54,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 02:43:54,133 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:43:54,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:43:54,134 INFO L85 PathProgramCache]: Analyzing trace with hash 505786124, now seen corresponding path program 1 times [2023-11-29 02:43:54,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:43:54,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767587564] [2023-11-29 02:43:54,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:54,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:43:54,203 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:43:54,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1792139356] [2023-11-29 02:43:54,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:43:54,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:43:54,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:43:54,205 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:43:54,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:43:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:43:54,607 INFO L262 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 02:43:54,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:43:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 7688 proven. 357 refuted. 0 times theorem prover too weak. 6235 trivial. 0 not checked. [2023-11-29 02:43:56,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:43:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 141 proven. 360 refuted. 0 times theorem prover too weak. 13779 trivial. 0 not checked. [2023-11-29 02:43:57,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:43:57,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767587564] [2023-11-29 02:43:57,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:43:57,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792139356] [2023-11-29 02:43:57,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792139356] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:43:57,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:43:57,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 20 [2023-11-29 02:43:57,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544588735] [2023-11-29 02:43:57,858 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:43:57,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 02:43:57,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:43:57,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 02:43:57,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:43:57,862 INFO L87 Difference]: Start difference. First operand 594 states and 942 transitions. Second operand has 20 states, 20 states have (on average 13.75) internal successors, (275), 20 states have internal predecessors, (275), 6 states have call successors, (170), 4 states have call predecessors, (170), 8 states have return successors, (170), 6 states have call predecessors, (170), 6 states have call successors, (170) [2023-11-29 02:43:59,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:43:59,713 INFO L93 Difference]: Finished difference Result 1509 states and 2363 transitions. [2023-11-29 02:43:59,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 02:43:59,714 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 13.75) internal successors, (275), 20 states have internal predecessors, (275), 6 states have call successors, (170), 4 states have call predecessors, (170), 8 states have return successors, (170), 6 states have call predecessors, (170), 6 states have call successors, (170) Word has length 560 [2023-11-29 02:43:59,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:43:59,719 INFO L225 Difference]: With dead ends: 1509 [2023-11-29 02:43:59,719 INFO L226 Difference]: Without dead ends: 916 [2023-11-29 02:43:59,722 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1146 GetRequests, 1104 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=574, Invalid=1318, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 02:43:59,722 INFO L413 NwaCegarLoop]: 371 mSDtfsCounter, 2421 mSDsluCounter, 1011 mSDsCounter, 0 mSdLazyCounter, 1257 mSolverCounterSat, 1145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2421 SdHoareTripleChecker+Valid, 1382 SdHoareTripleChecker+Invalid, 2402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1145 IncrementalHoareTripleChecker+Valid, 1257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:43:59,722 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2421 Valid, 1382 Invalid, 2402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1145 Valid, 1257 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 02:43:59,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2023-11-29 02:43:59,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 578. [2023-11-29 02:43:59,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 578 states, 395 states have (on average 1.3822784810126583) internal successors, (546), 395 states have internal predecessors, (546), 170 states have call successors, (170), 12 states have call predecessors, (170), 12 states have return successors, (170), 170 states have call predecessors, (170), 170 states have call successors, (170) [2023-11-29 02:43:59,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 578 states to 578 states and 886 transitions. [2023-11-29 02:43:59,812 INFO L78 Accepts]: Start accepts. Automaton has 578 states and 886 transitions. Word has length 560 [2023-11-29 02:43:59,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:43:59,813 INFO L495 AbstractCegarLoop]: Abstraction has 578 states and 886 transitions. [2023-11-29 02:43:59,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 13.75) internal successors, (275), 20 states have internal predecessors, (275), 6 states have call successors, (170), 4 states have call predecessors, (170), 8 states have return successors, (170), 6 states have call predecessors, (170), 6 states have call successors, (170) [2023-11-29 02:43:59,814 INFO L276 IsEmpty]: Start isEmpty. Operand 578 states and 886 transitions. [2023-11-29 02:43:59,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2023-11-29 02:43:59,817 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:43:59,817 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:43:59,824 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:44:00,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:00,018 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:44:00,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:00,018 INFO L85 PathProgramCache]: Analyzing trace with hash 516994386, now seen corresponding path program 1 times [2023-11-29 02:44:00,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:00,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812686277] [2023-11-29 02:44:00,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:00,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:00,076 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:44:00,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [106851972] [2023-11-29 02:44:00,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:00,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:00,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:00,078 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:44:00,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:44:00,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:00,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 1398 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 02:44:00,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:44:00,579 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-29 02:44:00,579 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:44:00,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:00,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812686277] [2023-11-29 02:44:00,579 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:44:00,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106851972] [2023-11-29 02:44:00,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106851972] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:44:00,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:44:00,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:44:00,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460278272] [2023-11-29 02:44:00,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:44:00,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:44:00,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:00,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:44:00,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:44:00,583 INFO L87 Difference]: Start difference. First operand 578 states and 886 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 02:44:00,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:44:00,741 INFO L93 Difference]: Finished difference Result 1372 states and 2099 transitions. [2023-11-29 02:44:00,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:44:00,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 562 [2023-11-29 02:44:00,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:44:00,748 INFO L225 Difference]: With dead ends: 1372 [2023-11-29 02:44:00,748 INFO L226 Difference]: Without dead ends: 795 [2023-11-29 02:44:00,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 561 GetRequests, 560 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:44:00,750 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 146 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 816 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:44:00,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 816 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:44:00,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2023-11-29 02:44:00,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 791. [2023-11-29 02:44:00,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 791 states, 598 states have (on average 1.4264214046822743) internal successors, (853), 600 states have internal predecessors, (853), 178 states have call successors, (178), 14 states have call predecessors, (178), 14 states have return successors, (178), 176 states have call predecessors, (178), 178 states have call successors, (178) [2023-11-29 02:44:00,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 791 states to 791 states and 1209 transitions. [2023-11-29 02:44:00,869 INFO L78 Accepts]: Start accepts. Automaton has 791 states and 1209 transitions. Word has length 562 [2023-11-29 02:44:00,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:44:00,869 INFO L495 AbstractCegarLoop]: Abstraction has 791 states and 1209 transitions. [2023-11-29 02:44:00,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 02:44:00,870 INFO L276 IsEmpty]: Start isEmpty. Operand 791 states and 1209 transitions. [2023-11-29 02:44:00,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2023-11-29 02:44:00,873 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:44:00,873 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:00,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 02:44:01,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 02:44:01,074 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:44:01,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:01,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1410480724, now seen corresponding path program 1 times [2023-11-29 02:44:01,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:01,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923218057] [2023-11-29 02:44:01,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:01,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:01,131 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:44:01,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2118997805] [2023-11-29 02:44:01,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:01,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:01,132 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:01,133 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:44:01,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:44:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:01,554 INFO L262 TraceCheckSpWp]: Trace formula consists of 1396 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 02:44:01,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:44:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 7114 proven. 141 refuted. 0 times theorem prover too weak. 7025 trivial. 0 not checked. [2023-11-29 02:44:02,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:44:03,208 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 111 proven. 141 refuted. 0 times theorem prover too weak. 14028 trivial. 0 not checked. [2023-11-29 02:44:03,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:03,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923218057] [2023-11-29 02:44:03,208 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:44:03,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118997805] [2023-11-29 02:44:03,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118997805] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:44:03,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:44:03,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-29 02:44:03,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312934438] [2023-11-29 02:44:03,209 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:44:03,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 02:44:03,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:03,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 02:44:03,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:44:03,213 INFO L87 Difference]: Start difference. First operand 791 states and 1209 transitions. Second operand has 16 states, 16 states have (on average 15.9375) internal successors, (255), 16 states have internal predecessors, (255), 4 states have call successors, (170), 3 states have call predecessors, (170), 5 states have return successors, (170), 4 states have call predecessors, (170), 4 states have call successors, (170) [2023-11-29 02:44:09,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:44:09,647 INFO L93 Difference]: Finished difference Result 4753 states and 7165 transitions. [2023-11-29 02:44:09,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 02:44:09,648 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 15.9375) internal successors, (255), 16 states have internal predecessors, (255), 4 states have call successors, (170), 3 states have call predecessors, (170), 5 states have return successors, (170), 4 states have call predecessors, (170), 4 states have call successors, (170) Word has length 562 [2023-11-29 02:44:09,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:44:09,667 INFO L225 Difference]: With dead ends: 4753 [2023-11-29 02:44:09,667 INFO L226 Difference]: Without dead ends: 3963 [2023-11-29 02:44:09,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1170 GetRequests, 1117 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=780, Invalid=2190, Unknown=0, NotChecked=0, Total=2970 [2023-11-29 02:44:09,671 INFO L413 NwaCegarLoop]: 501 mSDtfsCounter, 2899 mSDsluCounter, 4523 mSDsCounter, 0 mSdLazyCounter, 4392 mSolverCounterSat, 1399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3056 SdHoareTripleChecker+Valid, 5024 SdHoareTripleChecker+Invalid, 5791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1399 IncrementalHoareTripleChecker+Valid, 4392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:44:09,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3056 Valid, 5024 Invalid, 5791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1399 Valid, 4392 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-11-29 02:44:09,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3963 states. [2023-11-29 02:44:09,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3963 to 1619. [2023-11-29 02:44:09,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1210 states have (on average 1.4099173553719009) internal successors, (1706), 1214 states have internal predecessors, (1706), 376 states have call successors, (376), 32 states have call predecessors, (376), 32 states have return successors, (376), 372 states have call predecessors, (376), 376 states have call successors, (376) [2023-11-29 02:44:09,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 2458 transitions. [2023-11-29 02:44:09,923 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 2458 transitions. Word has length 562 [2023-11-29 02:44:09,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:44:09,924 INFO L495 AbstractCegarLoop]: Abstraction has 1619 states and 2458 transitions. [2023-11-29 02:44:09,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 15.9375) internal successors, (255), 16 states have internal predecessors, (255), 4 states have call successors, (170), 3 states have call predecessors, (170), 5 states have return successors, (170), 4 states have call predecessors, (170), 4 states have call successors, (170) [2023-11-29 02:44:09,924 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 2458 transitions. [2023-11-29 02:44:09,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 563 [2023-11-29 02:44:09,928 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:44:09,928 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:09,936 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 02:44:10,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 02:44:10,129 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:44:10,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:10,130 INFO L85 PathProgramCache]: Analyzing trace with hash 566475222, now seen corresponding path program 1 times [2023-11-29 02:44:10,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:10,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391772430] [2023-11-29 02:44:10,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:10,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:10,188 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:44:10,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1785984555] [2023-11-29 02:44:10,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:10,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:10,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:10,189 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:44:10,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:44:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:10,676 INFO L262 TraceCheckSpWp]: Trace formula consists of 1395 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 02:44:10,683 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:44:11,874 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 9140 proven. 315 refuted. 0 times theorem prover too weak. 4825 trivial. 0 not checked. [2023-11-29 02:44:11,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:44:12,330 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 312 proven. 189 refuted. 0 times theorem prover too weak. 13779 trivial. 0 not checked. [2023-11-29 02:44:12,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:12,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391772430] [2023-11-29 02:44:12,330 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:44:12,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785984555] [2023-11-29 02:44:12,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785984555] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:44:12,331 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:44:12,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-11-29 02:44:12,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836345351] [2023-11-29 02:44:12,331 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:44:12,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 02:44:12,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:12,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 02:44:12,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2023-11-29 02:44:12,335 INFO L87 Difference]: Start difference. First operand 1619 states and 2458 transitions. Second operand has 21 states, 21 states have (on average 11.666666666666666) internal successors, (245), 20 states have internal predecessors, (245), 6 states have call successors, (131), 4 states have call predecessors, (131), 8 states have return successors, (132), 6 states have call predecessors, (132), 6 states have call successors, (132) [2023-11-29 02:44:14,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:44:14,796 INFO L93 Difference]: Finished difference Result 5211 states and 7780 transitions. [2023-11-29 02:44:14,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 02:44:14,797 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 11.666666666666666) internal successors, (245), 20 states have internal predecessors, (245), 6 states have call successors, (131), 4 states have call predecessors, (131), 8 states have return successors, (132), 6 states have call predecessors, (132), 6 states have call successors, (132) Word has length 562 [2023-11-29 02:44:14,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:44:14,820 INFO L225 Difference]: With dead ends: 5211 [2023-11-29 02:44:14,821 INFO L226 Difference]: Without dead ends: 3593 [2023-11-29 02:44:14,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1150 GetRequests, 1106 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=566, Invalid=1504, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 02:44:14,827 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 1201 mSDsluCounter, 2881 mSDsCounter, 0 mSdLazyCounter, 2457 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1240 SdHoareTripleChecker+Valid, 3452 SdHoareTripleChecker+Invalid, 2863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 2457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:44:14,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1240 Valid, 3452 Invalid, 2863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 2457 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 02:44:14,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3593 states. [2023-11-29 02:44:15,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3593 to 2897. [2023-11-29 02:44:15,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2897 states, 2052 states have (on average 1.3421052631578947) internal successors, (2754), 2064 states have internal predecessors, (2754), 752 states have call successors, (752), 92 states have call predecessors, (752), 92 states have return successors, (752), 740 states have call predecessors, (752), 752 states have call successors, (752) [2023-11-29 02:44:15,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2897 states to 2897 states and 4258 transitions. [2023-11-29 02:44:15,346 INFO L78 Accepts]: Start accepts. Automaton has 2897 states and 4258 transitions. Word has length 562 [2023-11-29 02:44:15,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:44:15,347 INFO L495 AbstractCegarLoop]: Abstraction has 2897 states and 4258 transitions. [2023-11-29 02:44:15,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 11.666666666666666) internal successors, (245), 20 states have internal predecessors, (245), 6 states have call successors, (131), 4 states have call predecessors, (131), 8 states have return successors, (132), 6 states have call predecessors, (132), 6 states have call successors, (132) [2023-11-29 02:44:15,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2897 states and 4258 transitions. [2023-11-29 02:44:15,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2023-11-29 02:44:15,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:44:15,355 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:15,365 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 02:44:15,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:15,557 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:44:15,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:15,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1444355598, now seen corresponding path program 1 times [2023-11-29 02:44:15,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:15,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419656120] [2023-11-29 02:44:15,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:15,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:15,618 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:44:15,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [645021944] [2023-11-29 02:44:15,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:15,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:15,619 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:15,620 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:44:15,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 02:44:16,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:16,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 1396 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 02:44:16,189 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:44:17,221 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 5244 proven. 192 refuted. 0 times theorem prover too weak. 8844 trivial. 0 not checked. [2023-11-29 02:44:17,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:44:18,467 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 60 proven. 192 refuted. 0 times theorem prover too weak. 14028 trivial. 0 not checked. [2023-11-29 02:44:18,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:18,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419656120] [2023-11-29 02:44:18,468 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:44:18,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645021944] [2023-11-29 02:44:18,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645021944] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:44:18,468 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:44:18,468 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-29 02:44:18,468 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135711435] [2023-11-29 02:44:18,469 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:44:18,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 02:44:18,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:18,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 02:44:18,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:44:18,472 INFO L87 Difference]: Start difference. First operand 2897 states and 4258 transitions. Second operand has 16 states, 16 states have (on average 17.0) internal successors, (272), 16 states have internal predecessors, (272), 4 states have call successors, (170), 3 states have call predecessors, (170), 5 states have return successors, (170), 4 states have call predecessors, (170), 4 states have call successors, (170) [2023-11-29 02:44:21,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:44:21,180 INFO L93 Difference]: Finished difference Result 9825 states and 14357 transitions. [2023-11-29 02:44:21,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 02:44:21,181 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 17.0) internal successors, (272), 16 states have internal predecessors, (272), 4 states have call successors, (170), 3 states have call predecessors, (170), 5 states have return successors, (170), 4 states have call predecessors, (170), 4 states have call successors, (170) Word has length 563 [2023-11-29 02:44:21,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:44:21,223 INFO L225 Difference]: With dead ends: 9825 [2023-11-29 02:44:21,223 INFO L226 Difference]: Without dead ends: 6929 [2023-11-29 02:44:21,232 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1137 GetRequests, 1112 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2023-11-29 02:44:21,233 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 1496 mSDsluCounter, 2583 mSDsCounter, 0 mSdLazyCounter, 2223 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1578 SdHoareTripleChecker+Valid, 2948 SdHoareTripleChecker+Invalid, 2754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 2223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:44:21,233 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1578 Valid, 2948 Invalid, 2754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 2223 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 02:44:21,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6929 states. [2023-11-29 02:44:22,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6929 to 5839. [2023-11-29 02:44:22,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5839 states, 4142 states have (on average 1.3389666827619509) internal successors, (5546), 4166 states have internal predecessors, (5546), 1504 states have call successors, (1504), 192 states have call predecessors, (1504), 192 states have return successors, (1504), 1480 states have call predecessors, (1504), 1504 states have call successors, (1504) [2023-11-29 02:44:22,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5839 states to 5839 states and 8554 transitions. [2023-11-29 02:44:22,297 INFO L78 Accepts]: Start accepts. Automaton has 5839 states and 8554 transitions. Word has length 563 [2023-11-29 02:44:22,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:44:22,298 INFO L495 AbstractCegarLoop]: Abstraction has 5839 states and 8554 transitions. [2023-11-29 02:44:22,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 17.0) internal successors, (272), 16 states have internal predecessors, (272), 4 states have call successors, (170), 3 states have call predecessors, (170), 5 states have return successors, (170), 4 states have call predecessors, (170), 4 states have call successors, (170) [2023-11-29 02:44:22,298 INFO L276 IsEmpty]: Start isEmpty. Operand 5839 states and 8554 transitions. [2023-11-29 02:44:22,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2023-11-29 02:44:22,305 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:44:22,306 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:22,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 02:44:22,506 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:22,507 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:44:22,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:22,507 INFO L85 PathProgramCache]: Analyzing trace with hash -626707148, now seen corresponding path program 1 times [2023-11-29 02:44:22,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:22,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857232937] [2023-11-29 02:44:22,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:22,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:22,571 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:44:22,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1887383036] [2023-11-29 02:44:22,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:22,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:22,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:22,573 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:44:22,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 02:44:23,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:23,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 1396 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 02:44:23,039 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:44:23,817 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 9235 proven. 192 refuted. 0 times theorem prover too weak. 4853 trivial. 0 not checked. [2023-11-29 02:44:23,817 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:44:24,426 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 306 proven. 195 refuted. 0 times theorem prover too weak. 13779 trivial. 0 not checked. [2023-11-29 02:44:24,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:24,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857232937] [2023-11-29 02:44:24,427 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:44:24,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887383036] [2023-11-29 02:44:24,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887383036] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:44:24,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:44:24,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 25 [2023-11-29 02:44:24,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861581073] [2023-11-29 02:44:24,428 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:44:24,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 02:44:24,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:24,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 02:44:24,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2023-11-29 02:44:24,431 INFO L87 Difference]: Start difference. First operand 5839 states and 8554 transitions. Second operand has 25 states, 25 states have (on average 9.16) internal successors, (229), 25 states have internal predecessors, (229), 4 states have call successors, (132), 3 states have call predecessors, (132), 7 states have return successors, (133), 4 states have call predecessors, (133), 4 states have call successors, (133) [2023-11-29 02:44:28,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:44:28,383 INFO L93 Difference]: Finished difference Result 14004 states and 20229 transitions. [2023-11-29 02:44:28,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 02:44:28,383 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 9.16) internal successors, (229), 25 states have internal predecessors, (229), 4 states have call successors, (132), 3 states have call predecessors, (132), 7 states have return successors, (133), 4 states have call predecessors, (133), 4 states have call successors, (133) Word has length 563 [2023-11-29 02:44:28,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:44:28,421 INFO L225 Difference]: With dead ends: 14004 [2023-11-29 02:44:28,421 INFO L226 Difference]: Without dead ends: 8166 [2023-11-29 02:44:28,439 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1158 GetRequests, 1104 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 612 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=767, Invalid=2203, Unknown=0, NotChecked=0, Total=2970 [2023-11-29 02:44:28,440 INFO L413 NwaCegarLoop]: 307 mSDtfsCounter, 1406 mSDsluCounter, 3065 mSDsCounter, 0 mSdLazyCounter, 2580 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1444 SdHoareTripleChecker+Valid, 3372 SdHoareTripleChecker+Invalid, 2720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 2580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:44:28,440 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1444 Valid, 3372 Invalid, 2720 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 2580 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-29 02:44:28,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8166 states. [2023-11-29 02:44:29,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8166 to 5971. [2023-11-29 02:44:29,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5971 states, 4242 states have (on average 1.3215464403583215) internal successors, (5606), 4266 states have internal predecessors, (5606), 1504 states have call successors, (1504), 224 states have call predecessors, (1504), 224 states have return successors, (1504), 1480 states have call predecessors, (1504), 1504 states have call successors, (1504) [2023-11-29 02:44:29,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5971 states to 5971 states and 8614 transitions. [2023-11-29 02:44:29,594 INFO L78 Accepts]: Start accepts. Automaton has 5971 states and 8614 transitions. Word has length 563 [2023-11-29 02:44:29,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:44:29,595 INFO L495 AbstractCegarLoop]: Abstraction has 5971 states and 8614 transitions. [2023-11-29 02:44:29,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 9.16) internal successors, (229), 25 states have internal predecessors, (229), 4 states have call successors, (132), 3 states have call predecessors, (132), 7 states have return successors, (133), 4 states have call predecessors, (133), 4 states have call successors, (133) [2023-11-29 02:44:29,596 INFO L276 IsEmpty]: Start isEmpty. Operand 5971 states and 8614 transitions. [2023-11-29 02:44:29,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2023-11-29 02:44:29,603 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:44:29,603 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:29,613 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 02:44:29,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 02:44:29,804 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:44:29,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:29,804 INFO L85 PathProgramCache]: Analyzing trace with hash -604074894, now seen corresponding path program 1 times [2023-11-29 02:44:29,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:29,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672582731] [2023-11-29 02:44:29,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:29,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:29,872 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:44:29,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1055184342] [2023-11-29 02:44:29,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:29,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:29,872 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:29,873 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:44:29,877 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 02:44:30,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:30,578 INFO L262 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 02:44:30,585 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:44:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 8760 proven. 330 refuted. 0 times theorem prover too weak. 5190 trivial. 0 not checked. [2023-11-29 02:44:32,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:44:33,583 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 60 proven. 192 refuted. 0 times theorem prover too weak. 14028 trivial. 0 not checked. [2023-11-29 02:44:33,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:44:33,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672582731] [2023-11-29 02:44:33,584 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:44:33,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055184342] [2023-11-29 02:44:33,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055184342] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:44:33,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:44:33,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 21 [2023-11-29 02:44:33,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617496787] [2023-11-29 02:44:33,585 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:44:33,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 02:44:33,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:44:33,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 02:44:33,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=306, Unknown=0, NotChecked=0, Total=420 [2023-11-29 02:44:33,588 INFO L87 Difference]: Start difference. First operand 5971 states and 8614 transitions. Second operand has 21 states, 21 states have (on average 12.904761904761905) internal successors, (271), 21 states have internal predecessors, (271), 6 states have call successors, (160), 4 states have call predecessors, (160), 7 states have return successors, (160), 6 states have call predecessors, (160), 6 states have call successors, (160) [2023-11-29 02:44:39,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:44:39,745 INFO L93 Difference]: Finished difference Result 21415 states and 29760 transitions. [2023-11-29 02:44:39,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-11-29 02:44:39,746 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 12.904761904761905) internal successors, (271), 21 states have internal predecessors, (271), 6 states have call successors, (160), 4 states have call predecessors, (160), 7 states have return successors, (160), 6 states have call predecessors, (160), 6 states have call successors, (160) Word has length 563 [2023-11-29 02:44:39,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:44:39,784 INFO L225 Difference]: With dead ends: 21415 [2023-11-29 02:44:39,785 INFO L226 Difference]: Without dead ends: 15445 [2023-11-29 02:44:39,798 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1208 GetRequests, 1115 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2731 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2313, Invalid=6617, Unknown=0, NotChecked=0, Total=8930 [2023-11-29 02:44:39,798 INFO L413 NwaCegarLoop]: 294 mSDtfsCounter, 5127 mSDsluCounter, 1397 mSDsCounter, 0 mSdLazyCounter, 1939 mSolverCounterSat, 771 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5148 SdHoareTripleChecker+Valid, 1691 SdHoareTripleChecker+Invalid, 2710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 771 IncrementalHoareTripleChecker+Valid, 1939 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:44:39,798 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5148 Valid, 1691 Invalid, 2710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [771 Valid, 1939 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-29 02:44:39,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15445 states. [2023-11-29 02:44:41,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15445 to 12720. [2023-11-29 02:44:41,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12720 states, 10188 states have (on average 1.331370239497448) internal successors, (13564), 10297 states have internal predecessors, (13564), 2021 states have call successors, (2021), 510 states have call predecessors, (2021), 510 states have return successors, (2021), 1912 states have call predecessors, (2021), 2021 states have call successors, (2021) [2023-11-29 02:44:41,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12720 states to 12720 states and 17606 transitions. [2023-11-29 02:44:41,532 INFO L78 Accepts]: Start accepts. Automaton has 12720 states and 17606 transitions. Word has length 563 [2023-11-29 02:44:41,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:44:41,533 INFO L495 AbstractCegarLoop]: Abstraction has 12720 states and 17606 transitions. [2023-11-29 02:44:41,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 12.904761904761905) internal successors, (271), 21 states have internal predecessors, (271), 6 states have call successors, (160), 4 states have call predecessors, (160), 7 states have return successors, (160), 6 states have call predecessors, (160), 6 states have call successors, (160) [2023-11-29 02:44:41,534 INFO L276 IsEmpty]: Start isEmpty. Operand 12720 states and 17606 transitions. [2023-11-29 02:44:41,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2023-11-29 02:44:41,544 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:44:41,545 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:44:41,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 02:44:41,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 02:44:41,745 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:44:41,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:44:41,746 INFO L85 PathProgramCache]: Analyzing trace with hash -999021518, now seen corresponding path program 1 times [2023-11-29 02:44:41,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:44:41,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616251894] [2023-11-29 02:44:41,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:41,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:44:41,812 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:44:41,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042074219] [2023-11-29 02:44:41,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:44:41,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:44:41,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:44:41,814 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:44:41,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 02:44:42,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:44:42,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 1393 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 02:44:42,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:44:43,665 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 7010 proven. 390 refuted. 0 times theorem prover too weak. 6880 trivial. 0 not checked. [2023-11-29 02:44:43,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:45:14,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:45:14,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616251894] [2023-11-29 02:45:14,165 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:45:14,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042074219] [2023-11-29 02:45:14,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042074219] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:45:14,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:45:14,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2023-11-29 02:45:14,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345993954] [2023-11-29 02:45:14,166 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:45:14,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:45:14,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:45:14,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:45:14,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:45:14,168 INFO L87 Difference]: Start difference. First operand 12720 states and 17606 transitions. Second operand has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 3 states have call successors, (85), 3 states have call predecessors, (85), 4 states have return successors, (85), 2 states have call predecessors, (85), 3 states have call successors, (85) [2023-11-29 02:45:17,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:45:17,677 INFO L93 Difference]: Finished difference Result 26464 states and 36257 transitions. [2023-11-29 02:45:17,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:45:17,678 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 3 states have call successors, (85), 3 states have call predecessors, (85), 4 states have return successors, (85), 2 states have call predecessors, (85), 3 states have call successors, (85) Word has length 563 [2023-11-29 02:45:17,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:45:17,702 INFO L225 Difference]: With dead ends: 26464 [2023-11-29 02:45:17,702 INFO L226 Difference]: Without dead ends: 13758 [2023-11-29 02:45:17,719 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 644 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:45:17,720 INFO L413 NwaCegarLoop]: 385 mSDtfsCounter, 621 mSDsluCounter, 1443 mSDsCounter, 0 mSdLazyCounter, 1278 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 621 SdHoareTripleChecker+Valid, 1828 SdHoareTripleChecker+Invalid, 1287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:45:17,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [621 Valid, 1828 Invalid, 1287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1278 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 02:45:17,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13758 states. [2023-11-29 02:45:19,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13758 to 13188. [2023-11-29 02:45:19,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13188 states, 10539 states have (on average 1.3180567416263402) internal successors, (13891), 10648 states have internal predecessors, (13891), 2021 states have call successors, (2021), 627 states have call predecessors, (2021), 627 states have return successors, (2021), 1912 states have call predecessors, (2021), 2021 states have call successors, (2021) [2023-11-29 02:45:19,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13188 states to 13188 states and 17933 transitions. [2023-11-29 02:45:19,698 INFO L78 Accepts]: Start accepts. Automaton has 13188 states and 17933 transitions. Word has length 563 [2023-11-29 02:45:19,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:45:19,699 INFO L495 AbstractCegarLoop]: Abstraction has 13188 states and 17933 transitions. [2023-11-29 02:45:19,699 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 15.0) internal successors, (150), 10 states have internal predecessors, (150), 3 states have call successors, (85), 3 states have call predecessors, (85), 4 states have return successors, (85), 2 states have call predecessors, (85), 3 states have call successors, (85) [2023-11-29 02:45:19,700 INFO L276 IsEmpty]: Start isEmpty. Operand 13188 states and 17933 transitions. [2023-11-29 02:45:19,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2023-11-29 02:45:19,708 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:45:19,708 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:45:19,717 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-29 02:45:19,908 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:45:19,909 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:45:19,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:45:19,909 INFO L85 PathProgramCache]: Analyzing trace with hash 1402386806, now seen corresponding path program 1 times [2023-11-29 02:45:19,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:45:19,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640617566] [2023-11-29 02:45:19,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:45:19,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:45:19,965 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:45:19,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470284774] [2023-11-29 02:45:19,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:45:19,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:45:19,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:45:19,966 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:45:19,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 02:45:20,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:45:20,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 1398 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 02:45:20,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:45:20,930 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 1372 proven. 240 refuted. 0 times theorem prover too weak. 12668 trivial. 0 not checked. [2023-11-29 02:45:20,930 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:45:21,289 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 12 proven. 240 refuted. 0 times theorem prover too weak. 14028 trivial. 0 not checked. [2023-11-29 02:45:21,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:45:21,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640617566] [2023-11-29 02:45:21,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:45:21,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470284774] [2023-11-29 02:45:21,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470284774] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:45:21,290 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:45:21,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 02:45:21,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449187074] [2023-11-29 02:45:21,290 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:45:21,292 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:45:21,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:45:21,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:45:21,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:45:21,293 INFO L87 Difference]: Start difference. First operand 13188 states and 17933 transitions. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 2 states have call successors, (165), 2 states have call predecessors, (165), 4 states have return successors, (166), 2 states have call predecessors, (166), 2 states have call successors, (166) [2023-11-29 02:45:22,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:45:22,592 INFO L93 Difference]: Finished difference Result 13402 states and 18113 transitions. [2023-11-29 02:45:22,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:45:22,594 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 2 states have call successors, (165), 2 states have call predecessors, (165), 4 states have return successors, (166), 2 states have call predecessors, (166), 2 states have call successors, (166) Word has length 563 [2023-11-29 02:45:22,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:45:22,611 INFO L225 Difference]: With dead ends: 13402 [2023-11-29 02:45:22,611 INFO L226 Difference]: Without dead ends: 6766 [2023-11-29 02:45:22,621 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1128 GetRequests, 1118 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 02:45:22,621 INFO L413 NwaCegarLoop]: 312 mSDtfsCounter, 331 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 762 SdHoareTripleChecker+Invalid, 522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:45:22,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [335 Valid, 762 Invalid, 522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:45:22,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6766 states. [2023-11-29 02:45:23,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6766 to 6686. [2023-11-29 02:45:23,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6686 states, 5316 states have (on average 1.307750188111362) internal successors, (6952), 5369 states have internal predecessors, (6952), 1025 states have call successors, (1025), 344 states have call predecessors, (1025), 344 states have return successors, (1025), 972 states have call predecessors, (1025), 1025 states have call successors, (1025) [2023-11-29 02:45:23,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6686 states to 6686 states and 9002 transitions. [2023-11-29 02:45:23,476 INFO L78 Accepts]: Start accepts. Automaton has 6686 states and 9002 transitions. Word has length 563 [2023-11-29 02:45:23,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:45:23,477 INFO L495 AbstractCegarLoop]: Abstraction has 6686 states and 9002 transitions. [2023-11-29 02:45:23,477 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 2 states have call successors, (165), 2 states have call predecessors, (165), 4 states have return successors, (166), 2 states have call predecessors, (166), 2 states have call successors, (166) [2023-11-29 02:45:23,477 INFO L276 IsEmpty]: Start isEmpty. Operand 6686 states and 9002 transitions. [2023-11-29 02:45:23,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2023-11-29 02:45:23,485 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:45:23,486 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:45:23,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-29 02:45:23,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 02:45:23,686 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:45:23,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:45:23,687 INFO L85 PathProgramCache]: Analyzing trace with hash -964307788, now seen corresponding path program 1 times [2023-11-29 02:45:23,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:45:23,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878613498] [2023-11-29 02:45:23,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:45:23,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:45:23,735 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:45:23,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1151847499] [2023-11-29 02:45:23,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:45:23,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:45:23,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:45:23,736 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:45:23,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 02:45:24,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:45:24,205 INFO L262 TraceCheckSpWp]: Trace formula consists of 1396 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 02:45:24,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:45:50,329 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-29 02:45:50,330 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:45:50,330 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:45:50,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878613498] [2023-11-29 02:45:50,330 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:45:50,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151847499] [2023-11-29 02:45:50,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151847499] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:45:50,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:45:50,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:45:50,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470627680] [2023-11-29 02:45:50,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:45:50,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:45:50,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:45:50,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:45:50,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:45:50,332 INFO L87 Difference]: Start difference. First operand 6686 states and 9002 transitions. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 02:45:51,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:45:51,943 INFO L93 Difference]: Finished difference Result 15272 states and 20360 transitions. [2023-11-29 02:45:51,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:45:51,944 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 563 [2023-11-29 02:45:51,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:45:51,958 INFO L225 Difference]: With dead ends: 15272 [2023-11-29 02:45:51,958 INFO L226 Difference]: Without dead ends: 8608 [2023-11-29 02:45:51,965 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 559 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:45:51,965 INFO L413 NwaCegarLoop]: 446 mSDtfsCounter, 200 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:45:51,966 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 1522 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:45:51,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8608 states. [2023-11-29 02:45:52,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8608 to 7390. [2023-11-29 02:45:52,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7390 states, 5964 states have (on average 1.3105298457411134) internal successors, (7816), 6017 states have internal predecessors, (7816), 1025 states have call successors, (1025), 400 states have call predecessors, (1025), 400 states have return successors, (1025), 972 states have call predecessors, (1025), 1025 states have call successors, (1025) [2023-11-29 02:45:53,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7390 states to 7390 states and 9866 transitions. [2023-11-29 02:45:53,003 INFO L78 Accepts]: Start accepts. Automaton has 7390 states and 9866 transitions. Word has length 563 [2023-11-29 02:45:53,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:45:53,020 INFO L495 AbstractCegarLoop]: Abstraction has 7390 states and 9866 transitions. [2023-11-29 02:45:53,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 02:45:53,020 INFO L276 IsEmpty]: Start isEmpty. Operand 7390 states and 9866 transitions. [2023-11-29 02:45:53,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2023-11-29 02:45:53,026 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:45:53,026 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:45:53,035 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 02:45:53,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 02:45:53,227 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:45:53,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:45:53,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1358674574, now seen corresponding path program 1 times [2023-11-29 02:45:53,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:45:53,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555714376] [2023-11-29 02:45:53,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:45:53,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:45:53,274 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:45:53,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1680194976] [2023-11-29 02:45:53,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:45:53,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:45:53,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:45:53,275 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:45:53,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 02:45:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:45:54,014 INFO L262 TraceCheckSpWp]: Trace formula consists of 1395 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 02:45:54,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:45:57,295 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 7540 proven. 861 refuted. 0 times theorem prover too weak. 5879 trivial. 0 not checked. [2023-11-29 02:45:57,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:45:58,919 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 240 proven. 750 refuted. 0 times theorem prover too weak. 13290 trivial. 0 not checked. [2023-11-29 02:45:58,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:45:58,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555714376] [2023-11-29 02:45:58,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:45:58,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680194976] [2023-11-29 02:45:58,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680194976] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:45:58,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:45:58,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17] total 35 [2023-11-29 02:45:58,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470873828] [2023-11-29 02:45:58,920 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:45:58,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 02:45:58,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:45:58,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 02:45:58,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=857, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 02:45:58,924 INFO L87 Difference]: Start difference. First operand 7390 states and 9866 transitions. Second operand has 35 states, 33 states have (on average 8.454545454545455) internal successors, (279), 31 states have internal predecessors, (279), 10 states have call successors, (165), 6 states have call predecessors, (165), 12 states have return successors, (166), 10 states have call predecessors, (166), 10 states have call successors, (166) [2023-11-29 02:46:05,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:46:05,719 INFO L93 Difference]: Finished difference Result 18724 states and 25106 transitions. [2023-11-29 02:46:05,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-29 02:46:05,719 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 33 states have (on average 8.454545454545455) internal successors, (279), 31 states have internal predecessors, (279), 10 states have call successors, (165), 6 states have call predecessors, (165), 12 states have return successors, (166), 10 states have call predecessors, (166), 10 states have call successors, (166) Word has length 563 [2023-11-29 02:46:05,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:46:05,731 INFO L225 Difference]: With dead ends: 18724 [2023-11-29 02:46:05,732 INFO L226 Difference]: Without dead ends: 11356 [2023-11-29 02:46:05,744 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1185 GetRequests, 1101 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2052, Invalid=5258, Unknown=0, NotChecked=0, Total=7310 [2023-11-29 02:46:05,744 INFO L413 NwaCegarLoop]: 583 mSDtfsCounter, 2335 mSDsluCounter, 2695 mSDsCounter, 0 mSdLazyCounter, 3225 mSolverCounterSat, 563 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2339 SdHoareTripleChecker+Valid, 3278 SdHoareTripleChecker+Invalid, 3788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 563 IncrementalHoareTripleChecker+Valid, 3225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:46:05,745 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2339 Valid, 3278 Invalid, 3788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [563 Valid, 3225 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-29 02:46:05,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11356 states. [2023-11-29 02:46:06,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11356 to 5739. [2023-11-29 02:46:06,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5739 states, 4688 states have (on average 1.3353242320819112) internal successors, (6260), 4709 states have internal predecessors, (6260), 780 states have call successors, (780), 270 states have call predecessors, (780), 270 states have return successors, (780), 759 states have call predecessors, (780), 780 states have call successors, (780) [2023-11-29 02:46:06,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5739 states to 5739 states and 7820 transitions. [2023-11-29 02:46:06,574 INFO L78 Accepts]: Start accepts. Automaton has 5739 states and 7820 transitions. Word has length 563 [2023-11-29 02:46:06,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:46:06,575 INFO L495 AbstractCegarLoop]: Abstraction has 5739 states and 7820 transitions. [2023-11-29 02:46:06,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 33 states have (on average 8.454545454545455) internal successors, (279), 31 states have internal predecessors, (279), 10 states have call successors, (165), 6 states have call predecessors, (165), 12 states have return successors, (166), 10 states have call predecessors, (166), 10 states have call successors, (166) [2023-11-29 02:46:06,575 INFO L276 IsEmpty]: Start isEmpty. Operand 5739 states and 7820 transitions. [2023-11-29 02:46:06,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2023-11-29 02:46:06,580 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:46:06,580 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:46:06,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 02:46:06,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 02:46:06,781 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:46:06,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:46:06,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1336042320, now seen corresponding path program 1 times [2023-11-29 02:46:06,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:46:06,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471639212] [2023-11-29 02:46:06,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:46:06,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:46:06,839 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:46:06,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1712757760] [2023-11-29 02:46:06,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:46:06,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:46:06,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:46:06,840 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:46:06,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 02:46:07,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:46:07,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 1392 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 02:46:07,673 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:46:10,077 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 8638 proven. 564 refuted. 0 times theorem prover too weak. 5078 trivial. 0 not checked. [2023-11-29 02:46:10,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:46:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 174 proven. 573 refuted. 0 times theorem prover too weak. 13533 trivial. 0 not checked. [2023-11-29 02:46:14,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:46:14,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471639212] [2023-11-29 02:46:14,248 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:46:14,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712757760] [2023-11-29 02:46:14,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712757760] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:46:14,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:46:14,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2023-11-29 02:46:14,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800541329] [2023-11-29 02:46:14,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:46:14,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 02:46:14,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:46:14,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 02:46:14,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=661, Unknown=0, NotChecked=0, Total=870 [2023-11-29 02:46:14,252 INFO L87 Difference]: Start difference. First operand 5739 states and 7820 transitions. Second operand has 30 states, 30 states have (on average 9.5) internal successors, (285), 30 states have internal predecessors, (285), 9 states have call successors, (165), 5 states have call predecessors, (165), 11 states have return successors, (166), 9 states have call predecessors, (166), 9 states have call successors, (166) [2023-11-29 02:46:22,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:46:22,224 INFO L93 Difference]: Finished difference Result 13078 states and 17215 transitions. [2023-11-29 02:46:22,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2023-11-29 02:46:22,225 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 9.5) internal successors, (285), 30 states have internal predecessors, (285), 9 states have call successors, (165), 5 states have call predecessors, (165), 11 states have return successors, (166), 9 states have call predecessors, (166), 9 states have call successors, (166) Word has length 563 [2023-11-29 02:46:22,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:46:22,235 INFO L225 Difference]: With dead ends: 13078 [2023-11-29 02:46:22,235 INFO L226 Difference]: Without dead ends: 10087 [2023-11-29 02:46:22,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1212 GetRequests, 1110 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3407 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2690, Invalid=8022, Unknown=0, NotChecked=0, Total=10712 [2023-11-29 02:46:22,242 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 4473 mSDsluCounter, 1928 mSDsCounter, 0 mSdLazyCounter, 2826 mSolverCounterSat, 660 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4490 SdHoareTripleChecker+Valid, 2218 SdHoareTripleChecker+Invalid, 3486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 660 IncrementalHoareTripleChecker+Valid, 2826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:46:22,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4490 Valid, 2218 Invalid, 3486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [660 Valid, 2826 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-29 02:46:22,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10087 states. [2023-11-29 02:46:22,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10087 to 4545. [2023-11-29 02:46:22,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4545 states, 3766 states have (on average 1.3850238980350504) internal successors, (5216), 3771 states have internal predecessors, (5216), 612 states have call successors, (612), 166 states have call predecessors, (612), 166 states have return successors, (612), 607 states have call predecessors, (612), 612 states have call successors, (612) [2023-11-29 02:46:22,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4545 states to 4545 states and 6440 transitions. [2023-11-29 02:46:22,903 INFO L78 Accepts]: Start accepts. Automaton has 4545 states and 6440 transitions. Word has length 563 [2023-11-29 02:46:22,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:46:22,904 INFO L495 AbstractCegarLoop]: Abstraction has 4545 states and 6440 transitions. [2023-11-29 02:46:22,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 9.5) internal successors, (285), 30 states have internal predecessors, (285), 9 states have call successors, (165), 5 states have call predecessors, (165), 11 states have return successors, (166), 9 states have call predecessors, (166), 9 states have call successors, (166) [2023-11-29 02:46:22,904 INFO L276 IsEmpty]: Start isEmpty. Operand 4545 states and 6440 transitions. [2023-11-29 02:46:22,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2023-11-29 02:46:22,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:46:22,909 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:46:22,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 02:46:23,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:46:23,110 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:46:23,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:46:23,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1730988944, now seen corresponding path program 1 times [2023-11-29 02:46:23,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:46:23,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163714645] [2023-11-29 02:46:23,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:46:23,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:46:23,160 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:46:23,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [936771896] [2023-11-29 02:46:23,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:46:23,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:46:23,161 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:46:23,162 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:46:23,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 02:46:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:46:25,585 INFO L262 TraceCheckSpWp]: Trace formula consists of 1392 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 02:46:25,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:46:31,740 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 9358 proven. 1332 refuted. 0 times theorem prover too weak. 3590 trivial. 0 not checked. [2023-11-29 02:46:31,740 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:46:38,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:46:38,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163714645] [2023-11-29 02:46:38,348 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:46:38,348 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936771896] [2023-11-29 02:46:38,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936771896] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:46:38,348 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:46:38,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2023-11-29 02:46:38,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515478436] [2023-11-29 02:46:38,349 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 02:46:38,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 02:46:38,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:46:38,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 02:46:38,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=899, Unknown=1, NotChecked=0, Total=1122 [2023-11-29 02:46:38,351 INFO L87 Difference]: Start difference. First operand 4545 states and 6440 transitions. Second operand has 29 states, 29 states have (on average 6.310344827586207) internal successors, (183), 28 states have internal predecessors, (183), 9 states have call successors, (85), 9 states have call predecessors, (85), 15 states have return successors, (85), 9 states have call predecessors, (85), 9 states have call successors, (85) [2023-11-29 02:46:43,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:46:43,641 INFO L93 Difference]: Finished difference Result 17711 states and 24822 transitions. [2023-11-29 02:46:43,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-29 02:46:43,642 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 6.310344827586207) internal successors, (183), 28 states have internal predecessors, (183), 9 states have call successors, (85), 9 states have call predecessors, (85), 15 states have return successors, (85), 9 states have call predecessors, (85), 9 states have call successors, (85) Word has length 563 [2023-11-29 02:46:43,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:46:43,654 INFO L225 Difference]: With dead ends: 17711 [2023-11-29 02:46:43,654 INFO L226 Difference]: Without dead ends: 13181 [2023-11-29 02:46:43,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 909 GetRequests, 843 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=1032, Invalid=3523, Unknown=1, NotChecked=0, Total=4556 [2023-11-29 02:46:43,660 INFO L413 NwaCegarLoop]: 355 mSDtfsCounter, 2753 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 2566 mSolverCounterSat, 473 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2765 SdHoareTripleChecker+Valid, 1915 SdHoareTripleChecker+Invalid, 3039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 473 IncrementalHoareTripleChecker+Valid, 2566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:46:43,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2765 Valid, 1915 Invalid, 3039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [473 Valid, 2566 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-29 02:46:43,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13181 states. [2023-11-29 02:46:44,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13181 to 7725. [2023-11-29 02:46:44,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7725 states, 6570 states have (on average 1.3759512937595129) internal successors, (9040), 6583 states have internal predecessors, (9040), 812 states have call successors, (812), 342 states have call predecessors, (812), 342 states have return successors, (812), 799 states have call predecessors, (812), 812 states have call successors, (812) [2023-11-29 02:46:44,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7725 states to 7725 states and 10664 transitions. [2023-11-29 02:46:44,739 INFO L78 Accepts]: Start accepts. Automaton has 7725 states and 10664 transitions. Word has length 563 [2023-11-29 02:46:44,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:46:44,740 INFO L495 AbstractCegarLoop]: Abstraction has 7725 states and 10664 transitions. [2023-11-29 02:46:44,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 6.310344827586207) internal successors, (183), 28 states have internal predecessors, (183), 9 states have call successors, (85), 9 states have call predecessors, (85), 15 states have return successors, (85), 9 states have call predecessors, (85), 9 states have call successors, (85) [2023-11-29 02:46:44,740 INFO L276 IsEmpty]: Start isEmpty. Operand 7725 states and 10664 transitions. [2023-11-29 02:46:44,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2023-11-29 02:46:44,746 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:46:44,747 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:46:44,755 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 02:46:44,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:46:44,947 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:46:44,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:46:44,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1817122578, now seen corresponding path program 1 times [2023-11-29 02:46:44,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:46:44,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730022247] [2023-11-29 02:46:44,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:46:44,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:46:44,994 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:46:44,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1369115054] [2023-11-29 02:46:44,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:46:44,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:46:44,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:46:44,995 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:46:44,996 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 02:46:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:46:45,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 1392 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 02:46:45,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:46:50,177 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 8078 proven. 1206 refuted. 0 times theorem prover too weak. 4996 trivial. 0 not checked. [2023-11-29 02:46:50,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:46:54,078 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 216 proven. 1014 refuted. 0 times theorem prover too weak. 13050 trivial. 0 not checked. [2023-11-29 02:46:54,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:46:54,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730022247] [2023-11-29 02:46:54,078 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:46:54,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369115054] [2023-11-29 02:46:54,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369115054] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:46:54,079 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:46:54,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 41 [2023-11-29 02:46:54,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559055134] [2023-11-29 02:46:54,079 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:46:54,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 02:46:54,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:46:54,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 02:46:54,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=1244, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 02:46:54,083 INFO L87 Difference]: Start difference. First operand 7725 states and 10664 transitions. Second operand has 41 states, 40 states have (on average 7.5) internal successors, (300), 38 states have internal predecessors, (300), 12 states have call successors, (165), 7 states have call predecessors, (165), 16 states have return successors, (166), 12 states have call predecessors, (166), 12 states have call successors, (166) [2023-11-29 02:47:03,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:47:03,951 INFO L93 Difference]: Finished difference Result 17007 states and 22343 transitions. [2023-11-29 02:47:03,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-11-29 02:47:03,952 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 7.5) internal successors, (300), 38 states have internal predecessors, (300), 12 states have call successors, (165), 7 states have call predecessors, (165), 16 states have return successors, (166), 12 states have call predecessors, (166), 12 states have call successors, (166) Word has length 563 [2023-11-29 02:47:03,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:47:03,965 INFO L225 Difference]: With dead ends: 17007 [2023-11-29 02:47:03,965 INFO L226 Difference]: Without dead ends: 13011 [2023-11-29 02:47:03,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1220 GetRequests, 1095 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5326 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=3786, Invalid=12216, Unknown=0, NotChecked=0, Total=16002 [2023-11-29 02:47:03,973 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 2143 mSDsluCounter, 2007 mSDsCounter, 0 mSdLazyCounter, 3193 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2151 SdHoareTripleChecker+Valid, 2297 SdHoareTripleChecker+Invalid, 3491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 3193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:47:03,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2151 Valid, 2297 Invalid, 3491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 3193 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-11-29 02:47:03,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13011 states. [2023-11-29 02:47:05,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13011 to 7133. [2023-11-29 02:47:05,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7133 states, 5962 states have (on average 1.355249916135525) internal successors, (8080), 5975 states have internal predecessors, (8080), 812 states have call successors, (812), 358 states have call predecessors, (812), 358 states have return successors, (812), 799 states have call predecessors, (812), 812 states have call successors, (812) [2023-11-29 02:47:05,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7133 states to 7133 states and 9704 transitions. [2023-11-29 02:47:05,142 INFO L78 Accepts]: Start accepts. Automaton has 7133 states and 9704 transitions. Word has length 563 [2023-11-29 02:47:05,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:47:05,143 INFO L495 AbstractCegarLoop]: Abstraction has 7133 states and 9704 transitions. [2023-11-29 02:47:05,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 7.5) internal successors, (300), 38 states have internal predecessors, (300), 12 states have call successors, (165), 7 states have call predecessors, (165), 16 states have return successors, (166), 12 states have call predecessors, (166), 12 states have call successors, (166) [2023-11-29 02:47:05,143 INFO L276 IsEmpty]: Start isEmpty. Operand 7133 states and 9704 transitions. [2023-11-29 02:47:05,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2023-11-29 02:47:05,149 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:47:05,149 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:47:05,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 02:47:05,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:47:05,350 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:47:05,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:47:05,350 INFO L85 PathProgramCache]: Analyzing trace with hash 2082898094, now seen corresponding path program 1 times [2023-11-29 02:47:05,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:47:05,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830369743] [2023-11-29 02:47:05,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:47:05,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:47:05,399 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:47:05,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990987821] [2023-11-29 02:47:05,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:47:05,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:47:05,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:47:05,400 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:47:05,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 02:47:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:47:08,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 1392 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 02:47:08,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:47:24,969 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-29 02:47:24,969 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:47:24,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:47:24,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830369743] [2023-11-29 02:47:24,970 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:47:24,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990987821] [2023-11-29 02:47:24,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990987821] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:47:24,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:47:24,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:47:24,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186527999] [2023-11-29 02:47:24,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:47:24,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:47:24,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:47:24,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:47:24,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:47:24,972 INFO L87 Difference]: Start difference. First operand 7133 states and 9704 transitions. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 02:47:26,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:47:26,939 INFO L93 Difference]: Finished difference Result 15085 states and 20472 transitions. [2023-11-29 02:47:26,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:47:26,940 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 563 [2023-11-29 02:47:26,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:47:26,949 INFO L225 Difference]: With dead ends: 15085 [2023-11-29 02:47:26,949 INFO L226 Difference]: Without dead ends: 7967 [2023-11-29 02:47:26,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 559 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:47:26,956 INFO L413 NwaCegarLoop]: 484 mSDtfsCounter, 189 mSDsluCounter, 1116 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 1600 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:47:26,956 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [189 Valid, 1600 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 02:47:26,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7967 states. [2023-11-29 02:47:28,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7967 to 6125. [2023-11-29 02:47:28,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6125 states, 4954 states have (on average 1.3290270488494147) internal successors, (6584), 4967 states have internal predecessors, (6584), 812 states have call successors, (812), 358 states have call predecessors, (812), 358 states have return successors, (812), 799 states have call predecessors, (812), 812 states have call successors, (812) [2023-11-29 02:47:28,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6125 states to 6125 states and 8208 transitions. [2023-11-29 02:47:28,097 INFO L78 Accepts]: Start accepts. Automaton has 6125 states and 8208 transitions. Word has length 563 [2023-11-29 02:47:28,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:47:28,098 INFO L495 AbstractCegarLoop]: Abstraction has 6125 states and 8208 transitions. [2023-11-29 02:47:28,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 02:47:28,098 INFO L276 IsEmpty]: Start isEmpty. Operand 6125 states and 8208 transitions. [2023-11-29 02:47:28,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2023-11-29 02:47:28,103 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:47:28,103 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:47:28,111 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 02:47:28,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:47:28,304 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:47:28,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:47:28,304 INFO L85 PathProgramCache]: Analyzing trace with hash -166544011, now seen corresponding path program 1 times [2023-11-29 02:47:28,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:47:28,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65225027] [2023-11-29 02:47:28,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:47:28,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:47:28,351 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:47:28,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265141864] [2023-11-29 02:47:28,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:47:28,351 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:47:28,351 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:47:28,352 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:47:28,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d915e820-163a-455b-bd00-8a65209d0654/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 02:47:29,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:47:29,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 1397 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 02:47:29,328 INFO L285 TraceCheckSpWp]: Computing forward predicates...