./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-8.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_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/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_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-8.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/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_1143f6c1-0548-43a4-9cca-ded537e86ff6/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 2197c4d14fd5af1bc627adef461bd5f05d36e421274b7d409fe23e38f5f15829 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:01:12,323 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:01:12,382 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:01:12,386 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:01:12,387 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:01:12,407 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:01:12,408 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:01:12,408 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:01:12,409 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:01:12,409 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:01:12,410 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:01:12,410 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:01:12,411 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:01:12,411 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:01:12,412 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:01:12,412 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:01:12,413 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:01:12,413 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:01:12,414 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:01:12,414 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:01:12,415 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:01:12,416 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:01:12,416 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:01:12,416 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:01:12,417 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:01:12,417 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:01:12,418 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:01:12,418 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:01:12,418 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:01:12,419 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:01:12,419 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:01:12,420 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:01:12,420 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:01:12,420 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:01:12,420 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:01:12,420 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:01:12,421 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:01:12,421 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:01:12,421 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:01:12,421 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:01:12,421 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:01:12,422 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:01:12,422 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_1143f6c1-0548-43a4-9cca-ded537e86ff6/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2197c4d14fd5af1bc627adef461bd5f05d36e421274b7d409fe23e38f5f15829 [2023-11-29 05:01:12,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:01:12,685 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:01:12,688 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:01:12,689 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:01:12,690 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:01:12,691 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-8.i [2023-11-29 05:01:15,464 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:01:15,707 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:01:15,708 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-8.i [2023-11-29 05:01:15,724 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/data/ac29a4c16/686e1d5a1191488b8a33edfface07744/FLAGa78ebb856 [2023-11-29 05:01:15,738 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/data/ac29a4c16/686e1d5a1191488b8a33edfface07744 [2023-11-29 05:01:15,741 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:01:15,742 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:01:15,744 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:01:15,744 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:01:15,749 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:01:15,749 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:01:15" (1/1) ... [2023-11-29 05:01:15,750 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e37ea6e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:01:15, skipping insertion in model container [2023-11-29 05:01:15,751 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:01:15" (1/1) ... [2023-11-29 05:01:15,812 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:01:15,959 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_1143f6c1-0548-43a4-9cca-ded537e86ff6/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-8.i[915,928] [2023-11-29 05:01:16,183 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:01:16,201 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:01:16,210 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_1143f6c1-0548-43a4-9cca-ded537e86ff6/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-8.i[915,928] [2023-11-29 05:01:16,329 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:01:16,347 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:01:16,348 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:01:16 WrapperNode [2023-11-29 05:01:16,348 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:01:16,349 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:01:16,349 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:01:16,349 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:01:16,355 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:01:16" (1/1) ... [2023-11-29 05:01:16,383 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:01:16" (1/1) ... [2023-11-29 05:01:16,529 INFO L138 Inliner]: procedures = 26, calls = 91, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 803 [2023-11-29 05:01:16,530 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:01:16,531 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:01:16,531 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:01:16,531 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:01:16,543 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:01:16" (1/1) ... [2023-11-29 05:01:16,543 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:01:16" (1/1) ... [2023-11-29 05:01:16,565 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:01:16" (1/1) ... [2023-11-29 05:01:16,625 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 05:01:16,625 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:01:16" (1/1) ... [2023-11-29 05:01:16,625 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:01:16" (1/1) ... [2023-11-29 05:01:16,655 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:01:16" (1/1) ... [2023-11-29 05:01:16,669 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:01:16" (1/1) ... [2023-11-29 05:01:16,679 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:01:16" (1/1) ... [2023-11-29 05:01:16,686 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:01:16" (1/1) ... [2023-11-29 05:01:16,698 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:01:16,699 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:01:16,699 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:01:16,699 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:01:16,700 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:01:16" (1/1) ... [2023-11-29 05:01:16,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:01:16,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:01:16,728 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:01:16,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:01:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:01:16,760 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 05:01:16,761 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 05:01:16,761 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:01:16,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:01:16,761 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:01:16,899 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:01:16,901 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:01:17,962 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:01:18,019 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:01:18,019 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 05:01:18,020 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:01:18 BoogieIcfgContainer [2023-11-29 05:01:18,020 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:01:18,022 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:01:18,023 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:01:18,025 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:01:18,025 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:01:15" (1/3) ... [2023-11-29 05:01:18,026 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d1be08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:01:18, skipping insertion in model container [2023-11-29 05:01:18,026 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:01:16" (2/3) ... [2023-11-29 05:01:18,026 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34d1be08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:01:18, skipping insertion in model container [2023-11-29 05:01:18,026 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:01:18" (3/3) ... [2023-11-29 05:01:18,028 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-8.i [2023-11-29 05:01:18,042 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:01:18,042 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:01:18,093 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:01:18,098 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;@34450d0f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:01:18,098 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 05:01:18,104 INFO L276 IsEmpty]: Start isEmpty. Operand has 309 states, 228 states have (on average 1.5657894736842106) internal successors, (357), 229 states have internal predecessors, (357), 78 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-29 05:01:18,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2023-11-29 05:01:18,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:01:18,135 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:01:18,135 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:01:18,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:01:18,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1464253359, now seen corresponding path program 1 times [2023-11-29 05:01:18,147 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:01:18,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668394514] [2023-11-29 05:01:18,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:18,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:01:18,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:01:18,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:01:18,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668394514] [2023-11-29 05:01:18,470 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 05:01:18,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449637068] [2023-11-29 05:01:18,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:18,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:01:18,472 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:01:18,476 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:01:18,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:01:18,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:01:18,975 INFO L262 TraceCheckSpWp]: Trace formula consists of 1388 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 05:01:18,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:01:19,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 154 proven. 0 refuted. 0 times theorem prover too weak. 11858 trivial. 0 not checked. [2023-11-29 05:01:19,069 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:01:19,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449637068] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:01:19,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:01:19,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:01:19,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914227583] [2023-11-29 05:01:19,072 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:01:19,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 05:01:19,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:01:19,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 05:01:19,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 05:01:19,107 INFO L87 Difference]: Start difference. First operand has 309 states, 228 states have (on average 1.5657894736842106) internal successors, (357), 229 states have internal predecessors, (357), 78 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) Second operand has 2 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 2 states have call successors, (78), 2 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 2 states have call successors, (78) [2023-11-29 05:01:19,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:01:19,194 INFO L93 Difference]: Finished difference Result 615 states and 1102 transitions. [2023-11-29 05:01:19,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 05:01:19,196 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 2 states have call successors, (78), 2 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 2 states have call successors, (78) Word has length 551 [2023-11-29 05:01:19,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:01:19,207 INFO L225 Difference]: With dead ends: 615 [2023-11-29 05:01:19,207 INFO L226 Difference]: Without dead ends: 307 [2023-11-29 05:01:19,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 550 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 05:01:19,216 INFO L413 NwaCegarLoop]: 502 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, 502 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 05:01:19,217 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 502 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:01:19,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-11-29 05:01:19,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 307. [2023-11-29 05:01:19,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 227 states have (on average 1.5374449339207048) internal successors, (349), 227 states have internal predecessors, (349), 78 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 78 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-29 05:01:19,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 505 transitions. [2023-11-29 05:01:19,310 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 505 transitions. Word has length 551 [2023-11-29 05:01:19,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:01:19,311 INFO L495 AbstractCegarLoop]: Abstraction has 307 states and 505 transitions. [2023-11-29 05:01:19,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 83.0) internal successors, (166), 2 states have internal predecessors, (166), 2 states have call successors, (78), 2 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 2 states have call successors, (78) [2023-11-29 05:01:19,312 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 505 transitions. [2023-11-29 05:01:19,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2023-11-29 05:01:19,326 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:01:19,326 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:01:19,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:01:19,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 05:01:19,528 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:01:19,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:01:19,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1945586509, now seen corresponding path program 1 times [2023-11-29 05:01:19,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:01:19,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231300869] [2023-11-29 05:01:19,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:19,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:01:19,663 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:01:19,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [444994678] [2023-11-29 05:01:19,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:19,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:01:19,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:01:19,665 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:01:19,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:01:20,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:01:20,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 1388 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:01:20,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:01:21,063 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-29 05:01:21,064 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:01:21,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:01:21,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231300869] [2023-11-29 05:01:21,064 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:01:21,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444994678] [2023-11-29 05:01:21,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444994678] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:01:21,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:01:21,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:01:21,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611601096] [2023-11-29 05:01:21,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:01:21,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:01:21,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:01:21,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:01:21,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:01:21,070 INFO L87 Difference]: Start difference. First operand 307 states and 505 transitions. Second operand has 9 states, 9 states have (on average 18.22222222222222) internal successors, (164), 8 states have internal predecessors, (164), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:01:22,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:01:22,491 INFO L93 Difference]: Finished difference Result 1348 states and 2223 transitions. [2023-11-29 05:01:22,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 05:01:22,492 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 18.22222222222222) internal successors, (164), 8 states have internal predecessors, (164), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 551 [2023-11-29 05:01:22,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:01:22,506 INFO L225 Difference]: With dead ends: 1348 [2023-11-29 05:01:22,506 INFO L226 Difference]: Without dead ends: 1042 [2023-11-29 05:01:22,508 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 557 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2023-11-29 05:01:22,510 INFO L413 NwaCegarLoop]: 935 mSDtfsCounter, 1620 mSDsluCounter, 4220 mSDsCounter, 0 mSdLazyCounter, 926 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1620 SdHoareTripleChecker+Valid, 5155 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:01:22,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1620 Valid, 5155 Invalid, 1083 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [157 Valid, 926 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 05:01:22,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1042 states. [2023-11-29 05:01:22,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1042 to 633. [2023-11-29 05:01:22,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 474 states have (on average 1.5443037974683544) internal successors, (732), 474 states have internal predecessors, (732), 156 states have call successors, (156), 2 states have call predecessors, (156), 2 states have return successors, (156), 156 states have call predecessors, (156), 156 states have call successors, (156) [2023-11-29 05:01:22,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1044 transitions. [2023-11-29 05:01:22,650 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1044 transitions. Word has length 551 [2023-11-29 05:01:22,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:01:22,652 INFO L495 AbstractCegarLoop]: Abstraction has 633 states and 1044 transitions. [2023-11-29 05:01:22,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 18.22222222222222) internal successors, (164), 8 states have internal predecessors, (164), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:01:22,653 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1044 transitions. [2023-11-29 05:01:22,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2023-11-29 05:01:22,668 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:01:22,668 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:01:22,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:01:22,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:01:22,869 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:01:22,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:01:22,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1592498127, now seen corresponding path program 1 times [2023-11-29 05:01:22,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:01:22,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484129907] [2023-11-29 05:01:22,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:22,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:01:22,973 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:01:22,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737918455] [2023-11-29 05:01:22,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:22,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:01:22,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:01:22,975 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:01:22,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:01:23,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:01:23,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 1385 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:01:23,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:01:23,472 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-29 05:01:23,472 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:01:23,472 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:01:23,472 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484129907] [2023-11-29 05:01:23,473 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:01:23,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737918455] [2023-11-29 05:01:23,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737918455] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:01:23,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:01:23,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:01:23,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222018647] [2023-11-29 05:01:23,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:01:23,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:01:23,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:01:23,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:01:23,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:01:23,477 INFO L87 Difference]: Start difference. First operand 633 states and 1044 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:01:23,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:01:23,589 INFO L93 Difference]: Finished difference Result 1679 states and 2758 transitions. [2023-11-29 05:01:23,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:01:23,591 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 551 [2023-11-29 05:01:23,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:01:23,600 INFO L225 Difference]: With dead ends: 1679 [2023-11-29 05:01:23,600 INFO L226 Difference]: Without dead ends: 1047 [2023-11-29 05:01:23,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 549 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 05:01:23,604 INFO L413 NwaCegarLoop]: 572 mSDtfsCounter, 309 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 1059 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:01:23,605 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 1059 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:01:23,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1047 states. [2023-11-29 05:01:23,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1047 to 1043. [2023-11-29 05:01:23,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1043 states, 826 states have (on average 1.5544794188861986) internal successors, (1284), 828 states have internal predecessors, (1284), 212 states have call successors, (212), 4 states have call predecessors, (212), 4 states have return successors, (212), 210 states have call predecessors, (212), 212 states have call successors, (212) [2023-11-29 05:01:23,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1043 states to 1043 states and 1708 transitions. [2023-11-29 05:01:23,720 INFO L78 Accepts]: Start accepts. Automaton has 1043 states and 1708 transitions. Word has length 551 [2023-11-29 05:01:23,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:01:23,722 INFO L495 AbstractCegarLoop]: Abstraction has 1043 states and 1708 transitions. [2023-11-29 05:01:23,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:01:23,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1043 states and 1708 transitions. [2023-11-29 05:01:23,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2023-11-29 05:01:23,729 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:01:23,730 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:01:23,738 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:01:23,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:01:23,931 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:01:23,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:01:23,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1377612975, now seen corresponding path program 1 times [2023-11-29 05:01:23,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:01:23,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045711264] [2023-11-29 05:01:23,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:23,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:01:24,059 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:01:24,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1183542868] [2023-11-29 05:01:24,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:24,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:01:24,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:01:24,061 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:01:24,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:01:24,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:01:24,507 INFO L262 TraceCheckSpWp]: Trace formula consists of 1386 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:01:24,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:01:24,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-29 05:01:24,565 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:01:24,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:01:24,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045711264] [2023-11-29 05:01:24,567 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:01:24,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1183542868] [2023-11-29 05:01:24,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1183542868] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:01:24,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:01:24,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:01:24,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464354970] [2023-11-29 05:01:24,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:01:24,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:01:24,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:01:24,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:01:24,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:01:24,575 INFO L87 Difference]: Start difference. First operand 1043 states and 1708 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:01:24,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:01:24,731 INFO L93 Difference]: Finished difference Result 2873 states and 4696 transitions. [2023-11-29 05:01:24,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:01:24,732 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 551 [2023-11-29 05:01:24,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:01:24,744 INFO L225 Difference]: With dead ends: 2873 [2023-11-29 05:01:24,744 INFO L226 Difference]: Without dead ends: 1831 [2023-11-29 05:01:24,747 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 549 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 05:01:24,748 INFO L413 NwaCegarLoop]: 566 mSDtfsCounter, 305 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:01:24,749 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 1050 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:01:24,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1831 states. [2023-11-29 05:01:24,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1831 to 1825. [2023-11-29 05:01:24,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1825 states, 1500 states have (on average 1.5586666666666666) internal successors, (2338), 1506 states have internal predecessors, (2338), 316 states have call successors, (316), 8 states have call predecessors, (316), 8 states have return successors, (316), 310 states have call predecessors, (316), 316 states have call successors, (316) [2023-11-29 05:01:24,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1825 states to 1825 states and 2970 transitions. [2023-11-29 05:01:24,879 INFO L78 Accepts]: Start accepts. Automaton has 1825 states and 2970 transitions. Word has length 551 [2023-11-29 05:01:24,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:01:24,879 INFO L495 AbstractCegarLoop]: Abstraction has 1825 states and 2970 transitions. [2023-11-29 05:01:24,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 3 states have internal predecessors, (164), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:01:24,880 INFO L276 IsEmpty]: Start isEmpty. Operand 1825 states and 2970 transitions. [2023-11-29 05:01:24,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 552 [2023-11-29 05:01:24,885 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:01:24,885 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:01:24,892 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:01:25,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:01:25,087 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:01:25,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:01:25,087 INFO L85 PathProgramCache]: Analyzing trace with hash -2095503605, now seen corresponding path program 1 times [2023-11-29 05:01:25,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:01:25,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087874051] [2023-11-29 05:01:25,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:25,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:01:25,168 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:01:25,168 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [682781607] [2023-11-29 05:01:25,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:25,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:01:25,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:01:25,170 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:01:25,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:01:25,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:01:25,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 1383 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 05:01:25,603 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:01:27,781 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-29 05:01:27,781 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:01:27,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:01:27,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087874051] [2023-11-29 05:01:27,782 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:01:27,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682781607] [2023-11-29 05:01:27,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682781607] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:01:27,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:01:27,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:01:27,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525064188] [2023-11-29 05:01:27,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:01:27,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:01:27,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:01:27,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:01:27,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:01:27,787 INFO L87 Difference]: Start difference. First operand 1825 states and 2970 transitions. Second operand has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:01:28,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:01:28,270 INFO L93 Difference]: Finished difference Result 4910 states and 8013 transitions. [2023-11-29 05:01:28,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:01:28,272 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 551 [2023-11-29 05:01:28,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:01:28,292 INFO L225 Difference]: With dead ends: 4910 [2023-11-29 05:01:28,293 INFO L226 Difference]: Without dead ends: 3086 [2023-11-29 05:01:28,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 548 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 05:01:28,299 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 368 mSDsluCounter, 968 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 1467 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:01:28,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 1467 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:01:28,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3086 states. [2023-11-29 05:01:28,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3086 to 1972. [2023-11-29 05:01:28,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1972 states, 1568 states have (on average 1.5440051020408163) internal successors, (2421), 1574 states have internal predecessors, (2421), 394 states have call successors, (394), 9 states have call predecessors, (394), 9 states have return successors, (394), 388 states have call predecessors, (394), 394 states have call successors, (394) [2023-11-29 05:01:28,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1972 states to 1972 states and 3209 transitions. [2023-11-29 05:01:28,515 INFO L78 Accepts]: Start accepts. Automaton has 1972 states and 3209 transitions. Word has length 551 [2023-11-29 05:01:28,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:01:28,516 INFO L495 AbstractCegarLoop]: Abstraction has 1972 states and 3209 transitions. [2023-11-29 05:01:28,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.0) internal successors, (164), 3 states have internal predecessors, (164), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:01:28,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1972 states and 3209 transitions. [2023-11-29 05:01:28,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-29 05:01:28,523 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:01:28,524 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:01:28,532 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:01:28,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:01:28,725 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:01:28,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:01:28,725 INFO L85 PathProgramCache]: Analyzing trace with hash -525807221, now seen corresponding path program 1 times [2023-11-29 05:01:28,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:01:28,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811092367] [2023-11-29 05:01:28,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:28,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:01:28,816 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:01:28,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [978750990] [2023-11-29 05:01:28,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:28,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:01:28,817 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:01:28,818 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:01:28,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:01:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:01:29,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 1385 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:01:29,244 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:01:29,661 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 5621 proven. 147 refuted. 0 times theorem prover too weak. 6244 trivial. 0 not checked. [2023-11-29 05:01:29,661 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:01:30,094 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 84 proven. 147 refuted. 0 times theorem prover too weak. 11781 trivial. 0 not checked. [2023-11-29 05:01:30,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:01:30,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811092367] [2023-11-29 05:01:30,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:01:30,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978750990] [2023-11-29 05:01:30,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [978750990] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:01:30,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:01:30,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 05:01:30,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261877691] [2023-11-29 05:01:30,096 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:01:30,098 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:01:30,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:01:30,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:01:30,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:01:30,100 INFO L87 Difference]: Start difference. First operand 1972 states and 3209 transitions. Second operand has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 2 states have call successors, (127), 2 states have call predecessors, (127), 4 states have return successors, (128), 2 states have call predecessors, (128), 2 states have call successors, (128) [2023-11-29 05:01:30,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:01:30,596 INFO L93 Difference]: Finished difference Result 3020 states and 4909 transitions. [2023-11-29 05:01:30,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:01:30,598 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 2 states have call successors, (127), 2 states have call predecessors, (127), 4 states have return successors, (128), 2 states have call predecessors, (128), 2 states have call successors, (128) Word has length 552 [2023-11-29 05:01:30,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:01:30,607 INFO L225 Difference]: With dead ends: 3020 [2023-11-29 05:01:30,607 INFO L226 Difference]: Without dead ends: 1196 [2023-11-29 05:01:30,611 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1106 GetRequests, 1096 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 05:01:30,612 INFO L413 NwaCegarLoop]: 411 mSDtfsCounter, 322 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 1075 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:01:30,613 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 1075 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:01:30,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2023-11-29 05:01:30,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 1186. [2023-11-29 05:01:30,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1186 states, 891 states have (on average 1.5129068462401796) internal successors, (1348), 893 states have internal predecessors, (1348), 286 states have call successors, (286), 8 states have call predecessors, (286), 8 states have return successors, (286), 284 states have call predecessors, (286), 286 states have call successors, (286) [2023-11-29 05:01:30,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1186 states to 1186 states and 1920 transitions. [2023-11-29 05:01:30,771 INFO L78 Accepts]: Start accepts. Automaton has 1186 states and 1920 transitions. Word has length 552 [2023-11-29 05:01:30,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:01:30,772 INFO L495 AbstractCegarLoop]: Abstraction has 1186 states and 1920 transitions. [2023-11-29 05:01:30,773 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 2 states have call successors, (127), 2 states have call predecessors, (127), 4 states have return successors, (128), 2 states have call predecessors, (128), 2 states have call successors, (128) [2023-11-29 05:01:30,773 INFO L276 IsEmpty]: Start isEmpty. Operand 1186 states and 1920 transitions. [2023-11-29 05:01:30,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-29 05:01:30,779 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:01:30,779 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:01:30,787 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:01:30,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 05:01:30,980 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:01:30,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:01:30,981 INFO L85 PathProgramCache]: Analyzing trace with hash -1932174971, now seen corresponding path program 1 times [2023-11-29 05:01:30,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:01:30,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051106283] [2023-11-29 05:01:30,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:30,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:01:31,058 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:01:31,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1161577116] [2023-11-29 05:01:31,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:31,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:01:31,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:01:31,061 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:01:31,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:01:31,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:01:31,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:01:31,443 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:01:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-29 05:01:31,475 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:01:31,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:01:31,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051106283] [2023-11-29 05:01:31,476 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:01:31,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161577116] [2023-11-29 05:01:31,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161577116] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:01:31,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:01:31,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:01:31,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526020465] [2023-11-29 05:01:31,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:01:31,478 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:01:31,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:01:31,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:01:31,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:01:31,479 INFO L87 Difference]: Start difference. First operand 1186 states and 1920 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:01:31,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:01:31,592 INFO L93 Difference]: Finished difference Result 2236 states and 3609 transitions. [2023-11-29 05:01:31,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:01:31,593 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 552 [2023-11-29 05:01:31,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:01:31,600 INFO L225 Difference]: With dead ends: 2236 [2023-11-29 05:01:31,600 INFO L226 Difference]: Without dead ends: 1202 [2023-11-29 05:01:31,603 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 550 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 05:01:31,604 INFO L413 NwaCegarLoop]: 490 mSDtfsCounter, 297 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:01:31,604 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 972 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:01:31,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2023-11-29 05:01:31,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 850. [2023-11-29 05:01:31,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 606 states have (on average 1.4702970297029703) internal successors, (891), 606 states have internal predecessors, (891), 234 states have call successors, (234), 9 states have call predecessors, (234), 9 states have return successors, (234), 234 states have call predecessors, (234), 234 states have call successors, (234) [2023-11-29 05:01:31,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1359 transitions. [2023-11-29 05:01:31,679 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1359 transitions. Word has length 552 [2023-11-29 05:01:31,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:01:31,679 INFO L495 AbstractCegarLoop]: Abstraction has 850 states and 1359 transitions. [2023-11-29 05:01:31,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:01:31,680 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1359 transitions. [2023-11-29 05:01:31,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-29 05:01:31,683 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:01:31,683 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:01:31,690 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:01:31,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 05:01:31,884 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:01:31,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:01:31,885 INFO L85 PathProgramCache]: Analyzing trace with hash -73307887, now seen corresponding path program 1 times [2023-11-29 05:01:31,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:01:31,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277208563] [2023-11-29 05:01:31,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:31,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:01:31,959 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:01:31,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [156510442] [2023-11-29 05:01:31,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:31,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:01:31,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:01:31,961 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:01:31,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:01:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:01:32,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 1383 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:01:32,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:01:32,354 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-29 05:01:32,354 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:01:32,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:01:32,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277208563] [2023-11-29 05:01:32,355 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:01:32,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156510442] [2023-11-29 05:01:32,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156510442] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:01:32,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:01:32,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:01:32,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670911893] [2023-11-29 05:01:32,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:01:32,356 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:01:32,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:01:32,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:01:32,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:01:32,358 INFO L87 Difference]: Start difference. First operand 850 states and 1359 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:01:32,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:01:32,496 INFO L93 Difference]: Finished difference Result 2004 states and 3188 transitions. [2023-11-29 05:01:32,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:01:32,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 552 [2023-11-29 05:01:32,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:01:32,506 INFO L225 Difference]: With dead ends: 2004 [2023-11-29 05:01:32,506 INFO L226 Difference]: Without dead ends: 1310 [2023-11-29 05:01:32,509 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 550 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 05:01:32,510 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 289 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 974 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:01:32,510 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 974 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:01:32,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2023-11-29 05:01:32,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 1276. [2023-11-29 05:01:32,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 965 states have (on average 1.4818652849740932) internal successors, (1430), 967 states have internal predecessors, (1430), 294 states have call successors, (294), 16 states have call predecessors, (294), 16 states have return successors, (294), 292 states have call predecessors, (294), 294 states have call successors, (294) [2023-11-29 05:01:32,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 2018 transitions. [2023-11-29 05:01:32,638 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 2018 transitions. Word has length 552 [2023-11-29 05:01:32,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:01:32,639 INFO L495 AbstractCegarLoop]: Abstraction has 1276 states and 2018 transitions. [2023-11-29 05:01:32,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:01:32,640 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 2018 transitions. [2023-11-29 05:01:32,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-29 05:01:32,646 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:01:32,646 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:01:32,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-29 05:01:32,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:01:32,849 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:01:32,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:01:32,849 INFO L85 PathProgramCache]: Analyzing trace with hash 1545193993, now seen corresponding path program 1 times [2023-11-29 05:01:32,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:01:32,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699619009] [2023-11-29 05:01:32,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:32,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:01:32,918 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:01:32,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1272450545] [2023-11-29 05:01:32,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:32,918 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:01:32,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:01:32,919 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:01:32,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:01:33,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:01:33,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 1379 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:01:33,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:01:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-29 05:01:33,427 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:01:33,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:01:33,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699619009] [2023-11-29 05:01:33,427 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:01:33,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272450545] [2023-11-29 05:01:33,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272450545] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:01:33,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:01:33,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:01:33,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187331893] [2023-11-29 05:01:33,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:01:33,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:01:33,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:01:33,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:01:33,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:01:33,430 INFO L87 Difference]: Start difference. First operand 1276 states and 2018 transitions. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:01:33,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:01:33,996 INFO L93 Difference]: Finished difference Result 4774 states and 7609 transitions. [2023-11-29 05:01:33,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:01:33,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 552 [2023-11-29 05:01:33,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:01:34,016 INFO L225 Difference]: With dead ends: 4774 [2023-11-29 05:01:34,016 INFO L226 Difference]: Without dead ends: 3657 [2023-11-29 05:01:34,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 550 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 05:01:34,021 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 1164 mSDsluCounter, 1197 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1164 SdHoareTripleChecker+Valid, 1751 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:01:34,021 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1164 Valid, 1751 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:01:34,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3657 states. [2023-11-29 05:01:34,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3657 to 1591. [2023-11-29 05:01:34,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1591 states, 1280 states have (on average 1.48671875) internal successors, (1903), 1282 states have internal predecessors, (1903), 294 states have call successors, (294), 16 states have call predecessors, (294), 16 states have return successors, (294), 292 states have call predecessors, (294), 294 states have call successors, (294) [2023-11-29 05:01:34,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1591 states to 1591 states and 2491 transitions. [2023-11-29 05:01:34,154 INFO L78 Accepts]: Start accepts. Automaton has 1591 states and 2491 transitions. Word has length 552 [2023-11-29 05:01:34,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:01:34,154 INFO L495 AbstractCegarLoop]: Abstraction has 1591 states and 2491 transitions. [2023-11-29 05:01:34,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 4 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:01:34,155 INFO L276 IsEmpty]: Start isEmpty. Operand 1591 states and 2491 transitions. [2023-11-29 05:01:34,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-29 05:01:34,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:01:34,159 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:01:34,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 05:01:34,359 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:01:34,360 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:01:34,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:01:34,360 INFO L85 PathProgramCache]: Analyzing trace with hash 26399815, now seen corresponding path program 1 times [2023-11-29 05:01:34,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:01:34,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379076424] [2023-11-29 05:01:34,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:34,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:01:34,436 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:01:34,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1209372796] [2023-11-29 05:01:34,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:34,437 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:01:34,437 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:01:34,438 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:01:34,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:01:34,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:01:34,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 1382 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:01:34,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:01:35,241 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 5531 proven. 150 refuted. 0 times theorem prover too weak. 6331 trivial. 0 not checked. [2023-11-29 05:01:35,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:01:35,642 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 81 proven. 150 refuted. 0 times theorem prover too weak. 11781 trivial. 0 not checked. [2023-11-29 05:01:35,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:01:35,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379076424] [2023-11-29 05:01:35,643 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:01:35,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209372796] [2023-11-29 05:01:35,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209372796] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:01:35,643 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:01:35,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 05:01:35,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047876665] [2023-11-29 05:01:35,644 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:01:35,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:01:35,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:01:35,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:01:35,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:01:35,647 INFO L87 Difference]: Start difference. First operand 1591 states and 2491 transitions. Second operand has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 2 states have call successors, (128), 2 states have call predecessors, (128), 4 states have return successors, (129), 2 states have call predecessors, (129), 2 states have call successors, (129) [2023-11-29 05:01:36,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:01:36,130 INFO L93 Difference]: Finished difference Result 2939 states and 4595 transitions. [2023-11-29 05:01:36,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:01:36,131 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 2 states have call successors, (128), 2 states have call predecessors, (128), 4 states have return successors, (129), 2 states have call predecessors, (129), 2 states have call successors, (129) Word has length 552 [2023-11-29 05:01:36,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:01:36,139 INFO L225 Difference]: With dead ends: 2939 [2023-11-29 05:01:36,139 INFO L226 Difference]: Without dead ends: 1471 [2023-11-29 05:01:36,142 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1106 GetRequests, 1096 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 05:01:36,142 INFO L413 NwaCegarLoop]: 405 mSDtfsCounter, 877 mSDsluCounter, 650 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:01:36,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [903 Valid, 1055 Invalid, 550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:01:36,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1471 states. [2023-11-29 05:01:36,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1471 to 1445. [2023-11-29 05:01:36,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1445 states, 1129 states have (on average 1.4809565987599647) internal successors, (1672), 1131 states have internal predecessors, (1672), 294 states have call successors, (294), 21 states have call predecessors, (294), 21 states have return successors, (294), 292 states have call predecessors, (294), 294 states have call successors, (294) [2023-11-29 05:01:36,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1445 states to 1445 states and 2260 transitions. [2023-11-29 05:01:36,265 INFO L78 Accepts]: Start accepts. Automaton has 1445 states and 2260 transitions. Word has length 552 [2023-11-29 05:01:36,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:01:36,266 INFO L495 AbstractCegarLoop]: Abstraction has 1445 states and 2260 transitions. [2023-11-29 05:01:36,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 2 states have call successors, (128), 2 states have call predecessors, (128), 4 states have return successors, (129), 2 states have call predecessors, (129), 2 states have call successors, (129) [2023-11-29 05:01:36,267 INFO L276 IsEmpty]: Start isEmpty. Operand 1445 states and 2260 transitions. [2023-11-29 05:01:36,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-29 05:01:36,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:01:36,273 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:01:36,281 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 05:01:36,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:01:36,474 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:01:36,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:01:36,474 INFO L85 PathProgramCache]: Analyzing trace with hash 901093961, now seen corresponding path program 1 times [2023-11-29 05:01:36,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:01:36,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217391400] [2023-11-29 05:01:36,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:36,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:01:36,543 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:01:36,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812398502] [2023-11-29 05:01:36,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:36,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:01:36,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:01:36,545 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:01:36,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 05:01:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:01:36,981 INFO L262 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 05:01:36,991 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:01:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 6011 proven. 102 refuted. 0 times theorem prover too weak. 5899 trivial. 0 not checked. [2023-11-29 05:01:38,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:01:38,955 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 129 proven. 102 refuted. 0 times theorem prover too weak. 11781 trivial. 0 not checked. [2023-11-29 05:01:38,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:01:38,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217391400] [2023-11-29 05:01:38,955 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:01:38,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812398502] [2023-11-29 05:01:38,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812398502] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:01:38,955 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:01:38,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 24 [2023-11-29 05:01:38,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651848749] [2023-11-29 05:01:38,956 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:01:38,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 05:01:38,957 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:01:38,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 05:01:38,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2023-11-29 05:01:38,960 INFO L87 Difference]: Start difference. First operand 1445 states and 2260 transitions. Second operand has 24 states, 24 states have (on average 12.791666666666666) internal successors, (307), 24 states have internal predecessors, (307), 4 states have call successors, (156), 3 states have call predecessors, (156), 5 states have return successors, (156), 4 states have call predecessors, (156), 4 states have call successors, (156) [2023-11-29 05:01:44,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:01:44,458 INFO L93 Difference]: Finished difference Result 10681 states and 16944 transitions. [2023-11-29 05:01:44,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-29 05:01:44,459 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 12.791666666666666) internal successors, (307), 24 states have internal predecessors, (307), 4 states have call successors, (156), 3 states have call predecessors, (156), 5 states have return successors, (156), 4 states have call predecessors, (156), 4 states have call successors, (156) Word has length 552 [2023-11-29 05:01:44,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:01:44,516 INFO L225 Difference]: With dead ends: 10681 [2023-11-29 05:01:44,517 INFO L226 Difference]: Without dead ends: 9403 [2023-11-29 05:01:44,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1156 GetRequests, 1088 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1287 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=876, Invalid=3954, Unknown=0, NotChecked=0, Total=4830 [2023-11-29 05:01:44,524 INFO L413 NwaCegarLoop]: 658 mSDtfsCounter, 7743 mSDsluCounter, 8316 mSDsCounter, 0 mSdLazyCounter, 4128 mSolverCounterSat, 2003 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7820 SdHoareTripleChecker+Valid, 8974 SdHoareTripleChecker+Invalid, 6131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2003 IncrementalHoareTripleChecker+Valid, 4128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-29 05:01:44,524 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7820 Valid, 8974 Invalid, 6131 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2003 Valid, 4128 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-29 05:01:44,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9403 states. [2023-11-29 05:01:45,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9403 to 3895. [2023-11-29 05:01:45,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3895 states, 3194 states have (on average 1.4987476518472136) internal successors, (4787), 3202 states have internal predecessors, (4787), 644 states have call successors, (644), 56 states have call predecessors, (644), 56 states have return successors, (644), 636 states have call predecessors, (644), 644 states have call successors, (644) [2023-11-29 05:01:45,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3895 states to 3895 states and 6075 transitions. [2023-11-29 05:01:45,059 INFO L78 Accepts]: Start accepts. Automaton has 3895 states and 6075 transitions. Word has length 552 [2023-11-29 05:01:45,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:01:45,060 INFO L495 AbstractCegarLoop]: Abstraction has 3895 states and 6075 transitions. [2023-11-29 05:01:45,061 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 12.791666666666666) internal successors, (307), 24 states have internal predecessors, (307), 4 states have call successors, (156), 3 states have call predecessors, (156), 5 states have return successors, (156), 4 states have call predecessors, (156), 4 states have call successors, (156) [2023-11-29 05:01:45,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3895 states and 6075 transitions. [2023-11-29 05:01:45,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-29 05:01:45,070 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:01:45,070 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:01:45,079 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 05:01:45,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:01:45,271 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:01:45,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:01:45,272 INFO L85 PathProgramCache]: Analyzing trace with hash 1866185025, now seen corresponding path program 1 times [2023-11-29 05:01:45,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:01:45,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808616483] [2023-11-29 05:01:45,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:45,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:01:45,337 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:01:45,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1966386459] [2023-11-29 05:01:45,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:45,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:01:45,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:01:45,339 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:01:45,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 05:01:45,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:01:45,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:01:45,785 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:01:45,814 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-29 05:01:45,814 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:01:45,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:01:45,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808616483] [2023-11-29 05:01:45,814 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:01:45,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966386459] [2023-11-29 05:01:45,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966386459] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:01:45,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:01:45,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:01:45,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961647461] [2023-11-29 05:01:45,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:01:45,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:01:45,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:01:45,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:01:45,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:01:45,817 INFO L87 Difference]: Start difference. First operand 3895 states and 6075 transitions. Second operand has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:01:46,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:01:46,140 INFO L93 Difference]: Finished difference Result 9013 states and 14111 transitions. [2023-11-29 05:01:46,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:01:46,141 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 552 [2023-11-29 05:01:46,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:01:46,157 INFO L225 Difference]: With dead ends: 9013 [2023-11-29 05:01:46,157 INFO L226 Difference]: Without dead ends: 5289 [2023-11-29 05:01:46,164 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 550 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 05:01:46,165 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 152 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 990 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:01:46,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 990 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:01:46,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5289 states. [2023-11-29 05:01:46,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5289 to 5275. [2023-11-29 05:01:46,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5275 states, 4406 states have (on average 1.5054471175669542) internal successors, (6633), 4426 states have internal predecessors, (6633), 800 states have call successors, (800), 68 states have call predecessors, (800), 68 states have return successors, (800), 780 states have call predecessors, (800), 800 states have call successors, (800) [2023-11-29 05:01:46,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5275 states to 5275 states and 8233 transitions. [2023-11-29 05:01:46,600 INFO L78 Accepts]: Start accepts. Automaton has 5275 states and 8233 transitions. Word has length 552 [2023-11-29 05:01:46,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:01:46,600 INFO L495 AbstractCegarLoop]: Abstraction has 5275 states and 8233 transitions. [2023-11-29 05:01:46,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.0) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:01:46,601 INFO L276 IsEmpty]: Start isEmpty. Operand 5275 states and 8233 transitions. [2023-11-29 05:01:46,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-29 05:01:46,610 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:01:46,611 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:01:46,617 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 05:01:46,811 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:01:46,812 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:01:46,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:01:46,812 INFO L85 PathProgramCache]: Analyzing trace with hash 1560625483, now seen corresponding path program 1 times [2023-11-29 05:01:46,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:01:46,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075247411] [2023-11-29 05:01:46,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:46,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:01:46,899 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:01:46,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [810759131] [2023-11-29 05:01:46,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:46,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:01:46,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:01:46,901 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:01:46,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 05:01:47,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:01:47,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 1381 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 05:01:47,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:01:47,650 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-29 05:01:47,650 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:01:47,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:01:47,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075247411] [2023-11-29 05:01:47,651 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:01:47,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810759131] [2023-11-29 05:01:47,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810759131] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:01:47,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:01:47,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:01:47,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72222381] [2023-11-29 05:01:47,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:01:47,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:01:47,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:01:47,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:01:47,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:01:47,653 INFO L87 Difference]: Start difference. First operand 5275 states and 8233 transitions. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:01:48,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:01:48,347 INFO L93 Difference]: Finished difference Result 15483 states and 24183 transitions. [2023-11-29 05:01:48,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:01:48,348 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 552 [2023-11-29 05:01:48,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:01:48,371 INFO L225 Difference]: With dead ends: 15483 [2023-11-29 05:01:48,371 INFO L226 Difference]: Without dead ends: 10379 [2023-11-29 05:01:48,378 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 549 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:01:48,379 INFO L413 NwaCegarLoop]: 481 mSDtfsCounter, 273 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 1283 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:01:48,379 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [273 Valid, 1283 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:01:48,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10379 states. [2023-11-29 05:01:49,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10379 to 10377. [2023-11-29 05:01:49,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10377 states, 8724 states have (on average 1.507450710683173) internal successors, (13151), 8764 states have internal predecessors, (13151), 1522 states have call successors, (1522), 130 states have call predecessors, (1522), 130 states have return successors, (1522), 1482 states have call predecessors, (1522), 1522 states have call successors, (1522) [2023-11-29 05:01:49,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10377 states to 10377 states and 16195 transitions. [2023-11-29 05:01:49,249 INFO L78 Accepts]: Start accepts. Automaton has 10377 states and 16195 transitions. Word has length 552 [2023-11-29 05:01:49,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:01:49,250 INFO L495 AbstractCegarLoop]: Abstraction has 10377 states and 16195 transitions. [2023-11-29 05:01:49,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:01:49,250 INFO L276 IsEmpty]: Start isEmpty. Operand 10377 states and 16195 transitions. [2023-11-29 05:01:49,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-29 05:01:49,259 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:01:49,260 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:01:49,268 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 05:01:49,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 05:01:49,460 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:01:49,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:01:49,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1133270707, now seen corresponding path program 1 times [2023-11-29 05:01:49,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:01:49,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189799421] [2023-11-29 05:01:49,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:49,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:01:49,532 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:01:49,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1225833907] [2023-11-29 05:01:49,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:49,532 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:01:49,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:01:49,534 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:01:49,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 05:01:49,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:01:49,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 1378 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:01:49,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:01:51,310 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 681 proven. 225 refuted. 0 times theorem prover too weak. 11106 trivial. 0 not checked. [2023-11-29 05:01:51,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:01:51,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:01:51,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189799421] [2023-11-29 05:01:51,818 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:01:51,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225833907] [2023-11-29 05:01:51,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1225833907] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:01:51,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:01:51,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2023-11-29 05:01:51,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433948701] [2023-11-29 05:01:51,819 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 05:01:51,820 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:01:51,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:01:51,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:01:51,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:01:51,821 INFO L87 Difference]: Start difference. First operand 10377 states and 16195 transitions. Second operand has 7 states, 7 states have (on average 24.428571428571427) internal successors, (171), 6 states have internal predecessors, (171), 2 states have call successors, (78), 2 states have call predecessors, (78), 3 states have return successors, (78), 2 states have call predecessors, (78), 2 states have call successors, (78) [2023-11-29 05:01:53,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:01:53,254 INFO L93 Difference]: Finished difference Result 26001 states and 40372 transitions. [2023-11-29 05:01:53,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:01:53,254 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.428571428571427) internal successors, (171), 6 states have internal predecessors, (171), 2 states have call successors, (78), 2 states have call predecessors, (78), 3 states have return successors, (78), 2 states have call predecessors, (78), 2 states have call successors, (78) Word has length 552 [2023-11-29 05:01:53,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:01:53,281 INFO L225 Difference]: With dead ends: 26001 [2023-11-29 05:01:53,281 INFO L226 Difference]: Without dead ends: 15795 [2023-11-29 05:01:53,294 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 674 GetRequests, 662 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:01:53,295 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 353 mSDsluCounter, 1956 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 2366 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:01:53,295 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 2366 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 05:01:53,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15795 states. [2023-11-29 05:01:54,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15795 to 15675. [2023-11-29 05:01:54,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15675 states, 13189 states have (on average 1.4988247782242778) internal successors, (19768), 13249 states have internal predecessors, (19768), 2244 states have call successors, (2244), 241 states have call predecessors, (2244), 241 states have return successors, (2244), 2184 states have call predecessors, (2244), 2244 states have call successors, (2244) [2023-11-29 05:01:54,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15675 states to 15675 states and 24256 transitions. [2023-11-29 05:01:54,365 INFO L78 Accepts]: Start accepts. Automaton has 15675 states and 24256 transitions. Word has length 552 [2023-11-29 05:01:54,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:01:54,366 INFO L495 AbstractCegarLoop]: Abstraction has 15675 states and 24256 transitions. [2023-11-29 05:01:54,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.428571428571427) internal successors, (171), 6 states have internal predecessors, (171), 2 states have call successors, (78), 2 states have call predecessors, (78), 3 states have return successors, (78), 2 states have call predecessors, (78), 2 states have call successors, (78) [2023-11-29 05:01:54,366 INFO L276 IsEmpty]: Start isEmpty. Operand 15675 states and 24256 transitions. [2023-11-29 05:01:54,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-29 05:01:54,392 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:01:54,392 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:01:54,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 05:01:54,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:01:54,593 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:01:54,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:01:54,594 INFO L85 PathProgramCache]: Analyzing trace with hash -453998453, now seen corresponding path program 1 times [2023-11-29 05:01:54,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:01:54,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324904929] [2023-11-29 05:01:54,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:54,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:01:54,674 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:01:54,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1117147961] [2023-11-29 05:01:54,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:01:54,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:01:54,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:01:54,675 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:01:54,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 05:01:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:01:55,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 1377 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 05:01:55,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:01:56,333 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 5873 proven. 93 refuted. 0 times theorem prover too weak. 6046 trivial. 0 not checked. [2023-11-29 05:01:56,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:01:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 138 proven. 93 refuted. 0 times theorem prover too weak. 11781 trivial. 0 not checked. [2023-11-29 05:01:57,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:01:57,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324904929] [2023-11-29 05:01:57,158 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:01:57,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117147961] [2023-11-29 05:01:57,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117147961] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:01:57,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:01:57,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-29 05:01:57,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269357196] [2023-11-29 05:01:57,159 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:01:57,160 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 05:01:57,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:01:57,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 05:01:57,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:01:57,162 INFO L87 Difference]: Start difference. First operand 15675 states and 24256 transitions. Second operand has 18 states, 18 states have (on average 15.333333333333334) internal successors, (276), 18 states have internal predecessors, (276), 4 states have call successors, (156), 3 states have call predecessors, (156), 5 states have return successors, (156), 4 states have call predecessors, (156), 4 states have call successors, (156) [2023-11-29 05:02:00,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:02:00,947 INFO L93 Difference]: Finished difference Result 28858 states and 44878 transitions. [2023-11-29 05:02:00,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 05:02:00,948 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 15.333333333333334) internal successors, (276), 18 states have internal predecessors, (276), 4 states have call successors, (156), 3 states have call predecessors, (156), 5 states have return successors, (156), 4 states have call predecessors, (156), 4 states have call successors, (156) Word has length 552 [2023-11-29 05:02:00,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:02:00,974 INFO L225 Difference]: With dead ends: 28858 [2023-11-29 05:02:00,974 INFO L226 Difference]: Without dead ends: 20876 [2023-11-29 05:02:00,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1127 GetRequests, 1090 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=385, Invalid=1097, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 05:02:00,985 INFO L413 NwaCegarLoop]: 574 mSDtfsCounter, 2893 mSDsluCounter, 3849 mSDsCounter, 0 mSdLazyCounter, 3062 mSolverCounterSat, 674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2969 SdHoareTripleChecker+Valid, 4423 SdHoareTripleChecker+Invalid, 3736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 3062 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:02:00,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2969 Valid, 4423 Invalid, 3736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [674 Valid, 3062 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-29 05:02:00,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20876 states. [2023-11-29 05:02:02,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20876 to 15211. [2023-11-29 05:02:02,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15211 states, 12718 states have (on average 1.494338732505111) internal successors, (19005), 12778 states have internal predecessors, (19005), 2244 states have call successors, (2244), 248 states have call predecessors, (2244), 248 states have return successors, (2244), 2184 states have call predecessors, (2244), 2244 states have call successors, (2244) [2023-11-29 05:02:02,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15211 states to 15211 states and 23493 transitions. [2023-11-29 05:02:02,363 INFO L78 Accepts]: Start accepts. Automaton has 15211 states and 23493 transitions. Word has length 552 [2023-11-29 05:02:02,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:02:02,363 INFO L495 AbstractCegarLoop]: Abstraction has 15211 states and 23493 transitions. [2023-11-29 05:02:02,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 15.333333333333334) internal successors, (276), 18 states have internal predecessors, (276), 4 states have call successors, (156), 3 states have call predecessors, (156), 5 states have return successors, (156), 4 states have call predecessors, (156), 4 states have call successors, (156) [2023-11-29 05:02:02,363 INFO L276 IsEmpty]: Start isEmpty. Operand 15211 states and 23493 transitions. [2023-11-29 05:02:02,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-29 05:02:02,376 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:02:02,376 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:02:02,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 05:02:02,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:02,577 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:02:02,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:02,578 INFO L85 PathProgramCache]: Analyzing trace with hash -155302969, now seen corresponding path program 1 times [2023-11-29 05:02:02,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:02,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596151387] [2023-11-29 05:02:02,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:02,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:02,640 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:02:02,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1825711] [2023-11-29 05:02:02,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:02,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:02,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:02,642 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:02,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 05:02:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:03,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 1378 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 05:02:03,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-29 05:02:03,636 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:02:03,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:03,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596151387] [2023-11-29 05:02:03,637 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:02:03,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825711] [2023-11-29 05:02:03,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825711] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:02:03,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:02:03,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:02:03,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75877417] [2023-11-29 05:02:03,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:02:03,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:02:03,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:03,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:02:03,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:02:03,640 INFO L87 Difference]: Start difference. First operand 15211 states and 23493 transitions. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:02:04,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:02:04,585 INFO L93 Difference]: Finished difference Result 30245 states and 46723 transitions. [2023-11-29 05:02:04,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:02:04,586 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 552 [2023-11-29 05:02:04,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:02:04,607 INFO L225 Difference]: With dead ends: 30245 [2023-11-29 05:02:04,607 INFO L226 Difference]: Without dead ends: 15213 [2023-11-29 05:02:04,622 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 549 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 05:02:04,622 INFO L413 NwaCegarLoop]: 492 mSDtfsCounter, 305 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 1473 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:02:04,622 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 1473 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:02:04,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15213 states. [2023-11-29 05:02:05,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15213 to 15211. [2023-11-29 05:02:05,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15211 states, 12718 states have (on average 1.4929234156313886) internal successors, (18987), 12778 states have internal predecessors, (18987), 2244 states have call successors, (2244), 248 states have call predecessors, (2244), 248 states have return successors, (2244), 2184 states have call predecessors, (2244), 2244 states have call successors, (2244) [2023-11-29 05:02:05,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15211 states to 15211 states and 23475 transitions. [2023-11-29 05:02:05,893 INFO L78 Accepts]: Start accepts. Automaton has 15211 states and 23475 transitions. Word has length 552 [2023-11-29 05:02:05,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:02:05,893 INFO L495 AbstractCegarLoop]: Abstraction has 15211 states and 23475 transitions. [2023-11-29 05:02:05,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:02:05,893 INFO L276 IsEmpty]: Start isEmpty. Operand 15211 states and 23475 transitions. [2023-11-29 05:02:05,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-29 05:02:05,905 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:02:05,906 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:02:05,913 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 05:02:06,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 05:02:06,106 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:02:06,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:06,107 INFO L85 PathProgramCache]: Analyzing trace with hash -508391351, now seen corresponding path program 1 times [2023-11-29 05:02:06,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:06,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596167338] [2023-11-29 05:02:06,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:06,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:06,167 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:02:06,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1771412442] [2023-11-29 05:02:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:06,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:06,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:06,169 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:06,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 05:02:06,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:06,616 INFO L262 TraceCheckSpWp]: Trace formula consists of 1375 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 05:02:06,624 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:09,424 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 2543 proven. 204 refuted. 0 times theorem prover too weak. 9265 trivial. 0 not checked. [2023-11-29 05:02:09,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:02:10,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-29 05:02:10,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:10,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596167338] [2023-11-29 05:02:10,269 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:02:10,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771412442] [2023-11-29 05:02:10,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771412442] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 05:02:10,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:02:10,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [6] total 15 [2023-11-29 05:02:10,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985519613] [2023-11-29 05:02:10,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:02:10,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:02:10,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:10,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:02:10,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=174, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:02:10,273 INFO L87 Difference]: Start difference. First operand 15211 states and 23475 transitions. Second operand has 10 states, 10 states have (on average 16.5) internal successors, (165), 10 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:02:13,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:02:13,555 INFO L93 Difference]: Finished difference Result 82605 states and 131047 transitions. [2023-11-29 05:02:13,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:02:13,556 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 16.5) internal successors, (165), 10 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 552 [2023-11-29 05:02:13,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:02:13,646 INFO L225 Difference]: With dead ends: 82605 [2023-11-29 05:02:13,646 INFO L226 Difference]: Without dead ends: 67549 [2023-11-29 05:02:13,761 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1110 GetRequests, 1090 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=382, Unknown=0, NotChecked=0, Total=462 [2023-11-29 05:02:13,762 INFO L413 NwaCegarLoop]: 998 mSDtfsCounter, 1697 mSDsluCounter, 6559 mSDsCounter, 0 mSdLazyCounter, 660 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1697 SdHoareTripleChecker+Valid, 7557 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 05:02:13,762 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1697 Valid, 7557 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 660 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 05:02:13,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67549 states. [2023-11-29 05:02:16,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67549 to 28887. [2023-11-29 05:02:16,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28887 states, 23988 states have (on average 1.4937051859262964) internal successors, (35831), 24108 states have internal predecessors, (35831), 4410 states have call successors, (4410), 488 states have call predecessors, (4410), 488 states have return successors, (4410), 4290 states have call predecessors, (4410), 4410 states have call successors, (4410) [2023-11-29 05:02:16,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28887 states to 28887 states and 44651 transitions. [2023-11-29 05:02:16,605 INFO L78 Accepts]: Start accepts. Automaton has 28887 states and 44651 transitions. Word has length 552 [2023-11-29 05:02:16,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:02:16,606 INFO L495 AbstractCegarLoop]: Abstraction has 28887 states and 44651 transitions. [2023-11-29 05:02:16,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.5) internal successors, (165), 10 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:02:16,606 INFO L276 IsEmpty]: Start isEmpty. Operand 28887 states and 44651 transitions. [2023-11-29 05:02:16,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-29 05:02:16,634 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:02:16,635 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:02:16,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 05:02:16,835 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 05:02:16,836 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:02:16,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:16,836 INFO L85 PathProgramCache]: Analyzing trace with hash -841034489, now seen corresponding path program 1 times [2023-11-29 05:02:16,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:16,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481863322] [2023-11-29 05:02:16,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:16,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:16,905 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:02:16,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [517252396] [2023-11-29 05:02:16,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:16,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:16,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:16,906 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:16,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 05:02:17,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:17,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 1376 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:02:17,465 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:18,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-29 05:02:18,746 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:02:18,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:18,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481863322] [2023-11-29 05:02:18,746 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:02:18,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517252396] [2023-11-29 05:02:18,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [517252396] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:02:18,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:02:18,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:02:18,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964899275] [2023-11-29 05:02:18,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:02:18,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:02:18,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:18,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:02:18,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:02:18,749 INFO L87 Difference]: Start difference. First operand 28887 states and 44651 transitions. Second operand has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:02:21,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:02:21,458 INFO L93 Difference]: Finished difference Result 74110 states and 115504 transitions. [2023-11-29 05:02:21,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:02:21,459 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 552 [2023-11-29 05:02:21,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:02:21,521 INFO L225 Difference]: With dead ends: 74110 [2023-11-29 05:02:21,522 INFO L226 Difference]: Without dead ends: 45404 [2023-11-29 05:02:21,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 552 GetRequests, 549 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 05:02:21,555 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 370 mSDsluCounter, 961 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 1448 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:02:21,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 1448 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:02:21,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45404 states. [2023-11-29 05:02:24,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45404 to 38778. [2023-11-29 05:02:24,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38778 states, 33879 states have (on average 1.5452935446736917) internal successors, (52353), 33999 states have internal predecessors, (52353), 4410 states have call successors, (4410), 488 states have call predecessors, (4410), 488 states have return successors, (4410), 4290 states have call predecessors, (4410), 4410 states have call successors, (4410) [2023-11-29 05:02:24,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38778 states to 38778 states and 61173 transitions. [2023-11-29 05:02:24,450 INFO L78 Accepts]: Start accepts. Automaton has 38778 states and 61173 transitions. Word has length 552 [2023-11-29 05:02:24,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:02:24,451 INFO L495 AbstractCegarLoop]: Abstraction has 38778 states and 61173 transitions. [2023-11-29 05:02:24,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 41.25) internal successors, (165), 3 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:02:24,451 INFO L276 IsEmpty]: Start isEmpty. Operand 38778 states and 61173 transitions. [2023-11-29 05:02:24,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-29 05:02:24,473 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:02:24,473 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:02:24,480 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 05:02:24,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 05:02:24,674 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:02:24,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:24,674 INFO L85 PathProgramCache]: Analyzing trace with hash 510350729, now seen corresponding path program 1 times [2023-11-29 05:02:24,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:24,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069812147] [2023-11-29 05:02:24,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:24,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:24,735 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:02:24,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [802499554] [2023-11-29 05:02:24,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:24,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:24,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:24,736 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:24,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 05:02:25,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:25,249 INFO L262 TraceCheckSpWp]: Trace formula consists of 1376 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 05:02:25,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:25,566 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-29 05:02:25,566 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:02:25,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:25,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069812147] [2023-11-29 05:02:25,566 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:02:25,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802499554] [2023-11-29 05:02:25,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802499554] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:02:25,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:02:25,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:02:25,567 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509096258] [2023-11-29 05:02:25,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:02:25,568 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:02:25,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:25,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:02:25,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:02:25,569 INFO L87 Difference]: Start difference. First operand 38778 states and 61173 transitions. Second operand has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:02:36,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:02:36,841 INFO L93 Difference]: Finished difference Result 187310 states and 295237 transitions. [2023-11-29 05:02:36,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:02:36,842 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 552 [2023-11-29 05:02:36,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:02:37,041 INFO L225 Difference]: With dead ends: 187310 [2023-11-29 05:02:37,041 INFO L226 Difference]: Without dead ends: 153180 [2023-11-29 05:02:37,077 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 554 GetRequests, 547 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:02:37,078 INFO L413 NwaCegarLoop]: 1014 mSDtfsCounter, 1323 mSDsluCounter, 2534 mSDsCounter, 0 mSdLazyCounter, 920 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1323 SdHoareTripleChecker+Valid, 3548 SdHoareTripleChecker+Invalid, 1006 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:02:37,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1323 Valid, 3548 Invalid, 1006 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 920 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 05:02:37,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153180 states. [2023-11-29 05:02:42,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153180 to 64567. [2023-11-29 05:02:42,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64567 states, 56988 states have (on average 1.536639292482628) internal successors, (87570), 57204 states have internal predecessors, (87570), 6786 states have call successors, (6786), 792 states have call predecessors, (6786), 792 states have return successors, (6786), 6570 states have call predecessors, (6786), 6786 states have call successors, (6786) [2023-11-29 05:02:42,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64567 states to 64567 states and 101142 transitions. [2023-11-29 05:02:42,946 INFO L78 Accepts]: Start accepts. Automaton has 64567 states and 101142 transitions. Word has length 552 [2023-11-29 05:02:42,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:02:42,946 INFO L495 AbstractCegarLoop]: Abstraction has 64567 states and 101142 transitions. [2023-11-29 05:02:42,946 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 23.571428571428573) internal successors, (165), 7 states have internal predecessors, (165), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:02:42,946 INFO L276 IsEmpty]: Start isEmpty. Operand 64567 states and 101142 transitions. [2023-11-29 05:02:42,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 553 [2023-11-29 05:02:42,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:02:42,962 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:02:42,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-29 05:02:43,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:43,163 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:02:43,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:43,164 INFO L85 PathProgramCache]: Analyzing trace with hash -2050512117, now seen corresponding path program 1 times [2023-11-29 05:02:43,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:43,164 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027227382] [2023-11-29 05:02:43,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:43,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:43,216 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:02:43,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1777440333] [2023-11-29 05:02:43,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:43,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:43,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:43,218 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:43,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 05:02:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:43,703 INFO L262 TraceCheckSpWp]: Trace formula consists of 1376 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 05:02:43,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:46,188 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 6299 proven. 192 refuted. 0 times theorem prover too weak. 5521 trivial. 0 not checked. [2023-11-29 05:02:46,188 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:02:48,134 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 264 proven. 195 refuted. 0 times theorem prover too weak. 11553 trivial. 0 not checked. [2023-11-29 05:02:48,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:48,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027227382] [2023-11-29 05:02:48,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:02:48,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777440333] [2023-11-29 05:02:48,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777440333] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:02:48,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:02:48,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 22 [2023-11-29 05:02:48,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631934941] [2023-11-29 05:02:48,135 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:02:48,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 05:02:48,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:48,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 05:02:48,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=356, Unknown=0, NotChecked=0, Total=462 [2023-11-29 05:02:48,139 INFO L87 Difference]: Start difference. First operand 64567 states and 101142 transitions. Second operand has 22 states, 22 states have (on average 13.681818181818182) internal successors, (301), 22 states have internal predecessors, (301), 6 states have call successors, (156), 4 states have call predecessors, (156), 8 states have return successors, (156), 6 states have call predecessors, (156), 6 states have call successors, (156) [2023-11-29 05:03:20,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:03:20,904 INFO L93 Difference]: Finished difference Result 291819 states and 465418 transitions. [2023-11-29 05:03:20,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2023-11-29 05:03:20,905 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 13.681818181818182) internal successors, (301), 22 states have internal predecessors, (301), 6 states have call successors, (156), 4 states have call predecessors, (156), 8 states have return successors, (156), 6 states have call predecessors, (156), 6 states have call successors, (156) Word has length 552 [2023-11-29 05:03:20,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:03:21,255 INFO L225 Difference]: With dead ends: 291819 [2023-11-29 05:03:21,255 INFO L226 Difference]: Without dead ends: 238333 [2023-11-29 05:03:21,319 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1224 GetRequests, 1107 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5795 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3346, Invalid=10696, Unknown=0, NotChecked=0, Total=14042 [2023-11-29 05:03:21,320 INFO L413 NwaCegarLoop]: 571 mSDtfsCounter, 7030 mSDsluCounter, 10639 mSDsCounter, 0 mSdLazyCounter, 7038 mSolverCounterSat, 3168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7077 SdHoareTripleChecker+Valid, 11210 SdHoareTripleChecker+Invalid, 10206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3168 IncrementalHoareTripleChecker+Valid, 7038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:03:21,320 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7077 Valid, 11210 Invalid, 10206 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3168 Valid, 7038 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2023-11-29 05:03:21,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238333 states. [2023-11-29 05:03:35,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238333 to 110135. [2023-11-29 05:03:35,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110135 states, 94120 states have (on average 1.5237569060773481) internal successors, (143416), 94588 states have internal predecessors, (143416), 14310 states have call successors, (14310), 1704 states have call predecessors, (14310), 1704 states have return successors, (14310), 13842 states have call predecessors, (14310), 14310 states have call successors, (14310) [2023-11-29 05:03:35,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110135 states to 110135 states and 172036 transitions. [2023-11-29 05:03:35,737 INFO L78 Accepts]: Start accepts. Automaton has 110135 states and 172036 transitions. Word has length 552 [2023-11-29 05:03:35,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:03:35,738 INFO L495 AbstractCegarLoop]: Abstraction has 110135 states and 172036 transitions. [2023-11-29 05:03:35,738 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 13.681818181818182) internal successors, (301), 22 states have internal predecessors, (301), 6 states have call successors, (156), 4 states have call predecessors, (156), 8 states have return successors, (156), 6 states have call predecessors, (156), 6 states have call successors, (156) [2023-11-29 05:03:35,738 INFO L276 IsEmpty]: Start isEmpty. Operand 110135 states and 172036 transitions. [2023-11-29 05:03:35,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2023-11-29 05:03:35,765 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:03:35,765 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:03:35,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 05:03:35,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:35,966 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:03:35,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:35,966 INFO L85 PathProgramCache]: Analyzing trace with hash 35442446, now seen corresponding path program 1 times [2023-11-29 05:03:35,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:35,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785882349] [2023-11-29 05:03:35,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:35,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:36,017 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:03:36,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1546478062] [2023-11-29 05:03:36,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:36,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:36,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:36,018 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:36,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 05:03:36,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:36,489 INFO L262 TraceCheckSpWp]: Trace formula consists of 1376 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:03:36,495 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 3921 proven. 45 refuted. 0 times theorem prover too weak. 8046 trivial. 0 not checked. [2023-11-29 05:03:36,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:03:36,920 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 186 proven. 45 refuted. 0 times theorem prover too weak. 11781 trivial. 0 not checked. [2023-11-29 05:03:36,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:36,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785882349] [2023-11-29 05:03:36,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:03:36,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546478062] [2023-11-29 05:03:36,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546478062] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:03:36,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:03:36,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-29 05:03:36,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47293992] [2023-11-29 05:03:36,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:03:36,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:03:36,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:36,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:03:36,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:03:36,923 INFO L87 Difference]: Start difference. First operand 110135 states and 172036 transitions. Second operand has 10 states, 10 states have (on average 25.1) internal successors, (251), 10 states have internal predecessors, (251), 3 states have call successors, (93), 2 states have call predecessors, (93), 4 states have return successors, (94), 3 states have call predecessors, (94), 3 states have call successors, (94) [2023-11-29 05:04:05,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:04:05,000 INFO L93 Difference]: Finished difference Result 278931 states and 429841 transitions. [2023-11-29 05:04:05,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:04:05,001 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 25.1) internal successors, (251), 10 states have internal predecessors, (251), 3 states have call successors, (93), 2 states have call predecessors, (93), 4 states have return successors, (94), 3 states have call predecessors, (94), 3 states have call successors, (94) Word has length 553 [2023-11-29 05:04:05,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:04:05,479 INFO L225 Difference]: With dead ends: 278931 [2023-11-29 05:04:05,479 INFO L226 Difference]: Without dead ends: 183711 [2023-11-29 05:04:05,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1116 GetRequests, 1097 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2023-11-29 05:04:05,565 INFO L413 NwaCegarLoop]: 412 mSDtfsCounter, 1229 mSDsluCounter, 1182 mSDsCounter, 0 mSdLazyCounter, 723 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1353 SdHoareTripleChecker+Valid, 1594 SdHoareTripleChecker+Invalid, 1112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 05:04:05,565 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1353 Valid, 1594 Invalid, 1112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 723 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 05:04:05,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183711 states. [2023-11-29 05:04:32,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183711 to 180059. [2023-11-29 05:04:32,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180059 states, 147666 states have (on average 1.494331802852383) internal successors, (220662), 148646 states have internal predecessors, (220662), 28740 states have call successors, (28740), 3652 states have call predecessors, (28740), 3652 states have return successors, (28740), 27760 states have call predecessors, (28740), 28740 states have call successors, (28740) [2023-11-29 05:04:33,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180059 states to 180059 states and 278142 transitions. [2023-11-29 05:04:33,786 INFO L78 Accepts]: Start accepts. Automaton has 180059 states and 278142 transitions. Word has length 553 [2023-11-29 05:04:33,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:04:33,787 INFO L495 AbstractCegarLoop]: Abstraction has 180059 states and 278142 transitions. [2023-11-29 05:04:33,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 25.1) internal successors, (251), 10 states have internal predecessors, (251), 3 states have call successors, (93), 2 states have call predecessors, (93), 4 states have return successors, (94), 3 states have call predecessors, (94), 3 states have call successors, (94) [2023-11-29 05:04:33,787 INFO L276 IsEmpty]: Start isEmpty. Operand 180059 states and 278142 transitions. [2023-11-29 05:04:33,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 554 [2023-11-29 05:04:33,834 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:04:33,834 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:04:33,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-29 05:04:34,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:34,035 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:04:34,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:04:34,035 INFO L85 PathProgramCache]: Analyzing trace with hash -445637812, now seen corresponding path program 1 times [2023-11-29 05:04:34,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:04:34,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725970072] [2023-11-29 05:04:34,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:34,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:04:34,091 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:04:34,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1168760041] [2023-11-29 05:04:34,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:34,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:34,091 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:04:34,092 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:04:34,094 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 05:04:34,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:34,695 INFO L262 TraceCheckSpWp]: Trace formula consists of 1376 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 05:04:34,702 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:04:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 6299 proven. 192 refuted. 0 times theorem prover too weak. 5521 trivial. 0 not checked. [2023-11-29 05:04:37,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:04:39,711 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 264 proven. 195 refuted. 0 times theorem prover too weak. 11553 trivial. 0 not checked. [2023-11-29 05:04:39,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:04:39,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725970072] [2023-11-29 05:04:39,711 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:04:39,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168760041] [2023-11-29 05:04:39,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168760041] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:04:39,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:04:39,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 28 [2023-11-29 05:04:39,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943852421] [2023-11-29 05:04:39,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:04:39,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 05:04:39,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:04:39,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 05:04:39,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2023-11-29 05:04:39,714 INFO L87 Difference]: Start difference. First operand 180059 states and 278142 transitions. Second operand has 28 states, 28 states have (on average 11.178571428571429) internal successors, (313), 28 states have internal predecessors, (313), 6 states have call successors, (156), 4 states have call predecessors, (156), 8 states have return successors, (156), 6 states have call predecessors, (156), 6 states have call successors, (156) [2023-11-29 05:06:27,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:06:27,849 INFO L93 Difference]: Finished difference Result 798028 states and 1254038 transitions. [2023-11-29 05:06:27,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-29 05:06:27,850 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 11.178571428571429) internal successors, (313), 28 states have internal predecessors, (313), 6 states have call successors, (156), 4 states have call predecessors, (156), 8 states have return successors, (156), 6 states have call predecessors, (156), 6 states have call successors, (156) Word has length 553 [2023-11-29 05:06:27,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:06:29,268 INFO L225 Difference]: With dead ends: 798028 [2023-11-29 05:06:29,268 INFO L226 Difference]: Without dead ends: 628796 [2023-11-29 05:06:29,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1167 GetRequests, 1089 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2043 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1849, Invalid=4471, Unknown=0, NotChecked=0, Total=6320 [2023-11-29 05:06:29,651 INFO L413 NwaCegarLoop]: 441 mSDtfsCounter, 10752 mSDsluCounter, 10426 mSDsCounter, 0 mSdLazyCounter, 7334 mSolverCounterSat, 3175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10799 SdHoareTripleChecker+Valid, 10867 SdHoareTripleChecker+Invalid, 10509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3175 IncrementalHoareTripleChecker+Valid, 7334 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:06:29,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10799 Valid, 10867 Invalid, 10509 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3175 Valid, 7334 Invalid, 0 Unknown, 0 Unchecked, 10.2s Time] [2023-11-29 05:06:30,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628796 states. [2023-11-29 05:07:07,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628796 to 182458. [2023-11-29 05:07:07,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182458 states, 151711 states have (on average 1.5028508150364839) internal successors, (227999), 152651 states have internal predecessors, (227999), 27292 states have call successors, (27292), 3454 states have call predecessors, (27292), 3454 states have return successors, (27292), 26352 states have call predecessors, (27292), 27292 states have call successors, (27292) [2023-11-29 05:07:07,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182458 states to 182458 states and 282583 transitions. [2023-11-29 05:07:07,989 INFO L78 Accepts]: Start accepts. Automaton has 182458 states and 282583 transitions. Word has length 553 [2023-11-29 05:07:07,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:07:07,989 INFO L495 AbstractCegarLoop]: Abstraction has 182458 states and 282583 transitions. [2023-11-29 05:07:07,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 11.178571428571429) internal successors, (313), 28 states have internal predecessors, (313), 6 states have call successors, (156), 4 states have call predecessors, (156), 8 states have return successors, (156), 6 states have call predecessors, (156), 6 states have call successors, (156) [2023-11-29 05:07:07,990 INFO L276 IsEmpty]: Start isEmpty. Operand 182458 states and 282583 transitions. [2023-11-29 05:07:08,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2023-11-29 05:07:08,037 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:07:08,037 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:07:08,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 05:07:08,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 05:07:08,238 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:07:08,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:07:08,239 INFO L85 PathProgramCache]: Analyzing trace with hash 698267007, now seen corresponding path program 1 times [2023-11-29 05:07:08,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:07:08,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445971930] [2023-11-29 05:07:08,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:07:08,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:07:08,563 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:07:08,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [717220585] [2023-11-29 05:07:08,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:07:08,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:07:08,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:07:08,565 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:07:08,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 05:07:09,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:07:09,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 1377 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:07:09,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:07:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12012 trivial. 0 not checked. [2023-11-29 05:07:09,344 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:07:09,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:07:09,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445971930] [2023-11-29 05:07:09,345 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:07:09,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717220585] [2023-11-29 05:07:09,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717220585] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:07:09,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:07:09,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:07:09,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287066182] [2023-11-29 05:07:09,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:07:09,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:07:09,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:07:09,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:07:09,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:07:09,347 INFO L87 Difference]: Start difference. First operand 182458 states and 282583 transitions. Second operand has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:08:07,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:08:07,344 INFO L93 Difference]: Finished difference Result 543183 states and 841649 transitions. [2023-11-29 05:08:07,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:08:07,345 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) Word has length 554 [2023-11-29 05:08:07,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:08:07,982 INFO L225 Difference]: With dead ends: 543183 [2023-11-29 05:08:07,982 INFO L226 Difference]: Without dead ends: 364161 [2023-11-29 05:08:08,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 553 GetRequests, 552 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 05:08:08,158 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 476 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 476 SdHoareTripleChecker+Valid, 1019 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:08:08,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [476 Valid, 1019 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:08:08,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 364161 states. [2023-11-29 05:09:10,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 364161 to 364159. [2023-11-29 05:09:11,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364159 states, 302756 states have (on average 1.4906624476476107) internal successors, (451307), 304636 states have internal predecessors, (451307), 54506 states have call successors, (54506), 6896 states have call predecessors, (54506), 6896 states have return successors, (54506), 52626 states have call predecessors, (54506), 54506 states have call successors, (54506) [2023-11-29 05:09:12,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364159 states to 364159 states and 560319 transitions. [2023-11-29 05:09:12,677 INFO L78 Accepts]: Start accepts. Automaton has 364159 states and 560319 transitions. Word has length 554 [2023-11-29 05:09:12,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:09:12,677 INFO L495 AbstractCegarLoop]: Abstraction has 364159 states and 560319 transitions. [2023-11-29 05:09:12,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 1 states have call successors, (78), 1 states have call predecessors, (78), 1 states have return successors, (78), 1 states have call predecessors, (78), 1 states have call successors, (78) [2023-11-29 05:09:12,678 INFO L276 IsEmpty]: Start isEmpty. Operand 364159 states and 560319 transitions. [2023-11-29 05:09:12,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 555 [2023-11-29 05:09:12,958 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:09:12,958 INFO L195 NwaCegarLoop]: trace histogram [78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:09:12,966 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 05:09:13,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 05:09:13,159 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:09:13,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:09:13,160 INFO L85 PathProgramCache]: Analyzing trace with hash -331092291, now seen corresponding path program 1 times [2023-11-29 05:09:13,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:09:13,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092464051] [2023-11-29 05:09:13,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:13,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:09:13,211 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:09:13,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1955741843] [2023-11-29 05:09:13,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:09:13,212 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:09:13,212 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:09:13,213 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:09:13,216 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1143f6c1-0548-43a4-9cca-ded537e86ff6/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 05:09:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:13,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 1374 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 05:09:13,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:09:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 4337 proven. 51 refuted. 0 times theorem prover too weak. 7624 trivial. 0 not checked. [2023-11-29 05:09:14,388 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:09:15,022 INFO L134 CoverageAnalysis]: Checked inductivity of 12012 backedges. 180 proven. 51 refuted. 0 times theorem prover too weak. 11781 trivial. 0 not checked. [2023-11-29 05:09:15,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:09:15,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092464051] [2023-11-29 05:09:15,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:09:15,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955741843] [2023-11-29 05:09:15,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955741843] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:09:15,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:09:15,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2023-11-29 05:09:15,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770816477] [2023-11-29 05:09:15,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:09:15,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:09:15,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:09:15,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:09:15,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:09:15,026 INFO L87 Difference]: Start difference. First operand 364159 states and 560319 transitions. Second operand has 14 states, 14 states have (on average 20.214285714285715) internal successors, (283), 14 states have internal predecessors, (283), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 3 states have call predecessors, (96), 4 states have call successors, (96) [2023-11-29 05:13:38,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:13:38,485 INFO L93 Difference]: Finished difference Result 1649351 states and 2498832 transitions. [2023-11-29 05:13:38,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 05:13:38,486 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 20.214285714285715) internal successors, (283), 14 states have internal predecessors, (283), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 3 states have call predecessors, (96), 4 states have call successors, (96) Word has length 554 [2023-11-29 05:13:38,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:13:41,559 INFO L225 Difference]: With dead ends: 1649351 [2023-11-29 05:13:41,559 INFO L226 Difference]: Without dead ends: 1329957 [2023-11-29 05:13:42,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1137 GetRequests, 1099 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=503, Invalid=1057, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 05:13:42,261 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 2462 mSDsluCounter, 2146 mSDsCounter, 0 mSdLazyCounter, 2088 mSolverCounterSat, 832 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2582 SdHoareTripleChecker+Valid, 2671 SdHoareTripleChecker+Invalid, 2920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 832 IncrementalHoareTripleChecker+Valid, 2088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:13:42,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2582 Valid, 2671 Invalid, 2920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [832 Valid, 2088 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-29 05:13:43,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329957 states.