./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-31.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/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_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-31.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/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_3ae4749b-856f-4b14-836e-f02737bc8a98/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 a7443a0a8cb83ad1cb418009a7dc67d45dd495b9ce5249e0f3a79a6d2936d9f0 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 01:32:18,415 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 01:32:18,485 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 01:32:18,489 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 01:32:18,490 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 01:32:18,513 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 01:32:18,513 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 01:32:18,514 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 01:32:18,515 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 01:32:18,515 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 01:32:18,516 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 01:32:18,516 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 01:32:18,517 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 01:32:18,518 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 01:32:18,518 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 01:32:18,519 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 01:32:18,519 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 01:32:18,520 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 01:32:18,520 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 01:32:18,521 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 01:32:18,521 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 01:32:18,522 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 01:32:18,522 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 01:32:18,523 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 01:32:18,523 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 01:32:18,523 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 01:32:18,524 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 01:32:18,524 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 01:32:18,525 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 01:32:18,525 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 01:32:18,526 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 01:32:18,526 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:32:18,526 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 01:32:18,527 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 01:32:18,527 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 01:32:18,528 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 01:32:18,528 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 01:32:18,528 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 01:32:18,529 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 01:32:18,529 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 01:32:18,529 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 01:32:18,529 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 01:32:18,529 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_3ae4749b-856f-4b14-836e-f02737bc8a98/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a7443a0a8cb83ad1cb418009a7dc67d45dd495b9ce5249e0f3a79a6d2936d9f0 [2023-11-29 01:32:18,772 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 01:32:18,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 01:32:18,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 01:32:18,801 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 01:32:18,802 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 01:32:18,803 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-31.i [2023-11-29 01:32:21,629 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 01:32:21,885 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 01:32:21,885 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-31.i [2023-11-29 01:32:21,902 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/data/4c7a12783/b0c549dde3734136921aa27840626a02/FLAGe618c58d4 [2023-11-29 01:32:21,918 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/data/4c7a12783/b0c549dde3734136921aa27840626a02 [2023-11-29 01:32:21,920 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 01:32:21,922 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 01:32:21,924 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 01:32:21,924 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 01:32:21,929 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 01:32:21,930 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:32:21" (1/1) ... [2023-11-29 01:32:21,931 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@33c1f429 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:32:21, skipping insertion in model container [2023-11-29 01:32:21,931 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 01:32:21" (1/1) ... [2023-11-29 01:32:22,006 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 01:32:22,158 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_3ae4749b-856f-4b14-836e-f02737bc8a98/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-31.i[916,929] [2023-11-29 01:32:22,418 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:32:22,439 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 01:32:22,452 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_3ae4749b-856f-4b14-836e-f02737bc8a98/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-31.i[916,929] [2023-11-29 01:32:22,595 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 01:32:22,617 INFO L206 MainTranslator]: Completed translation [2023-11-29 01:32:22,618 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:32:22 WrapperNode [2023-11-29 01:32:22,618 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 01:32:22,619 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 01:32:22,619 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 01:32:22,619 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 01:32:22,626 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:32:22" (1/1) ... [2023-11-29 01:32:22,662 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:32:22" (1/1) ... [2023-11-29 01:32:22,857 INFO L138 Inliner]: procedures = 26, calls = 105, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 904 [2023-11-29 01:32:22,857 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 01:32:22,858 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 01:32:22,858 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 01:32:22,859 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 01:32:22,868 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:32:22" (1/1) ... [2023-11-29 01:32:22,869 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:32:22" (1/1) ... [2023-11-29 01:32:22,897 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:32:22" (1/1) ... [2023-11-29 01:32:22,962 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 01:32:22,962 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:32:22" (1/1) ... [2023-11-29 01:32:22,963 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:32:22" (1/1) ... [2023-11-29 01:32:23,009 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:32:22" (1/1) ... [2023-11-29 01:32:23,017 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:32:22" (1/1) ... [2023-11-29 01:32:23,043 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:32:22" (1/1) ... [2023-11-29 01:32:23,050 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:32:22" (1/1) ... [2023-11-29 01:32:23,089 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 01:32:23,090 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 01:32:23,090 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 01:32:23,090 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 01:32:23,091 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:32:22" (1/1) ... [2023-11-29 01:32:23,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 01:32:23,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:23,119 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 01:32:23,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 01:32:23,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 01:32:23,184 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 01:32:23,184 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 01:32:23,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 01:32:23,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 01:32:23,185 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 01:32:23,362 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 01:32:23,365 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 01:32:24,695 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 01:32:24,768 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 01:32:24,768 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 01:32:24,769 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:32:24 BoogieIcfgContainer [2023-11-29 01:32:24,769 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 01:32:24,772 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 01:32:24,772 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 01:32:24,775 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 01:32:24,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 01:32:21" (1/3) ... [2023-11-29 01:32:24,776 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b26d7f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:32:24, skipping insertion in model container [2023-11-29 01:32:24,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 01:32:22" (2/3) ... [2023-11-29 01:32:24,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b26d7f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 01:32:24, skipping insertion in model container [2023-11-29 01:32:24,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 01:32:24" (3/3) ... [2023-11-29 01:32:24,779 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-31.i [2023-11-29 01:32:24,800 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 01:32:24,801 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 01:32:24,868 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 01:32:24,876 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;@57b16bea, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 01:32:24,876 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 01:32:24,883 INFO L276 IsEmpty]: Start isEmpty. Operand has 339 states, 244 states have (on average 1.5737704918032787) internal successors, (384), 245 states have internal predecessors, (384), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) [2023-11-29 01:32:24,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 601 [2023-11-29 01:32:24,945 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:24,947 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:24,947 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:32:24,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:24,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1660497484, now seen corresponding path program 1 times [2023-11-29 01:32:24,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:24,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556088722] [2023-11-29 01:32:24,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:24,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:25,298 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:25,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [281654433] [2023-11-29 01:32:25,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:25,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:25,299 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:25,301 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:25,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 01:32:25,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:25,818 INFO L262 TraceCheckSpWp]: Trace formula consists of 1437 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:32:25,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 01:32:26,956 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:26,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:26,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556088722] [2023-11-29 01:32:26,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:26,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281654433] [2023-11-29 01:32:26,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281654433] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:26,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:26,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:32:26,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227760959] [2023-11-29 01:32:26,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:26,968 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:32:26,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:27,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:32:27,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:32:27,005 INFO L87 Difference]: Start difference. First operand has 339 states, 244 states have (on average 1.5737704918032787) internal successors, (384), 245 states have internal predecessors, (384), 92 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 92 states have call predecessors, (92), 92 states have call successors, (92) Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:32:27,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:27,585 INFO L93 Difference]: Finished difference Result 1012 states and 1887 transitions. [2023-11-29 01:32:27,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:32:27,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 600 [2023-11-29 01:32:27,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:27,609 INFO L225 Difference]: With dead ends: 1012 [2023-11-29 01:32:27,609 INFO L226 Difference]: Without dead ends: 674 [2023-11-29 01:32:27,616 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 597 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 01:32:27,620 INFO L413 NwaCegarLoop]: 549 mSDtfsCounter, 557 mSDsluCounter, 1086 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 557 SdHoareTripleChecker+Valid, 1635 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:27,621 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [557 Valid, 1635 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:32:27,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2023-11-29 01:32:27,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 658. [2023-11-29 01:32:27,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 471 states have (on average 1.545647558386412) internal successors, (728), 471 states have internal predecessors, (728), 184 states have call successors, (184), 2 states have call predecessors, (184), 2 states have return successors, (184), 184 states have call predecessors, (184), 184 states have call successors, (184) [2023-11-29 01:32:27,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 1096 transitions. [2023-11-29 01:32:27,809 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 1096 transitions. Word has length 600 [2023-11-29 01:32:27,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:27,812 INFO L495 AbstractCegarLoop]: Abstraction has 658 states and 1096 transitions. [2023-11-29 01:32:27,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 3 states have internal predecessors, (143), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:32:27,812 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 1096 transitions. [2023-11-29 01:32:27,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 602 [2023-11-29 01:32:27,824 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:27,825 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:27,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 01:32:28,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 01:32:28,026 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:32:28,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:28,027 INFO L85 PathProgramCache]: Analyzing trace with hash -921836706, now seen corresponding path program 1 times [2023-11-29 01:32:28,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:28,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315366071] [2023-11-29 01:32:28,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:28,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:28,158 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:28,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1612346967] [2023-11-29 01:32:28,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:28,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:28,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:28,160 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:28,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 01:32:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:28,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 1438 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 01:32:28,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:29,332 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 01:32:29,332 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:29,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:29,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315366071] [2023-11-29 01:32:29,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:29,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612346967] [2023-11-29 01:32:29,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612346967] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:29,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:29,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:32:29,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77612398] [2023-11-29 01:32:29,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:29,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:32:29,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:29,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:32:29,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:32:29,338 INFO L87 Difference]: Start difference. First operand 658 states and 1096 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:32:29,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:29,795 INFO L93 Difference]: Finished difference Result 1177 states and 1966 transitions. [2023-11-29 01:32:29,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:32:29,796 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 601 [2023-11-29 01:32:29,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:29,803 INFO L225 Difference]: With dead ends: 1177 [2023-11-29 01:32:29,803 INFO L226 Difference]: Without dead ends: 674 [2023-11-29 01:32:29,804 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 598 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 01:32:29,806 INFO L413 NwaCegarLoop]: 548 mSDtfsCounter, 374 mSDsluCounter, 1087 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 1635 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:29,806 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 1635 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 01:32:29,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2023-11-29 01:32:29,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 659. [2023-11-29 01:32:29,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 472 states have (on average 1.5423728813559323) internal successors, (728), 472 states have internal predecessors, (728), 184 states have call successors, (184), 2 states have call predecessors, (184), 2 states have return successors, (184), 184 states have call predecessors, (184), 184 states have call successors, (184) [2023-11-29 01:32:29,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1096 transitions. [2023-11-29 01:32:29,896 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1096 transitions. Word has length 601 [2023-11-29 01:32:29,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:29,898 INFO L495 AbstractCegarLoop]: Abstraction has 659 states and 1096 transitions. [2023-11-29 01:32:29,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:32:29,899 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1096 transitions. [2023-11-29 01:32:29,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2023-11-29 01:32:29,912 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:29,913 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:29,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-29 01:32:30,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:30,114 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:32:30,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:30,115 INFO L85 PathProgramCache]: Analyzing trace with hash 495674661, now seen corresponding path program 1 times [2023-11-29 01:32:30,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:30,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720298768] [2023-11-29 01:32:30,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:30,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:30,199 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:30,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [982580592] [2023-11-29 01:32:30,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:30,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:30,200 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:30,201 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:30,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 01:32:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:30,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 1443 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:32:30,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:30,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 01:32:30,708 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:30,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:30,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720298768] [2023-11-29 01:32:30,709 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:30,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982580592] [2023-11-29 01:32:30,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [982580592] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:30,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:30,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:32:30,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017325629] [2023-11-29 01:32:30,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:30,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:32:30,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:30,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:32:30,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:32:30,714 INFO L87 Difference]: Start difference. First operand 659 states and 1096 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:32:30,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:30,817 INFO L93 Difference]: Finished difference Result 1469 states and 2442 transitions. [2023-11-29 01:32:30,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:32:30,818 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 602 [2023-11-29 01:32:30,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:30,825 INFO L225 Difference]: With dead ends: 1469 [2023-11-29 01:32:30,826 INFO L226 Difference]: Without dead ends: 1052 [2023-11-29 01:32:30,827 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 600 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 01:32:30,828 INFO L413 NwaCegarLoop]: 696 mSDtfsCounter, 353 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 1236 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:30,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [353 Valid, 1236 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:32:30,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2023-11-29 01:32:30,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 1049. [2023-11-29 01:32:30,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1049 states, 819 states have (on average 1.586080586080586) internal successors, (1299), 820 states have internal predecessors, (1299), 225 states have call successors, (225), 4 states have call predecessors, (225), 4 states have return successors, (225), 224 states have call predecessors, (225), 225 states have call successors, (225) [2023-11-29 01:32:30,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1049 states to 1049 states and 1749 transitions. [2023-11-29 01:32:30,953 INFO L78 Accepts]: Start accepts. Automaton has 1049 states and 1749 transitions. Word has length 602 [2023-11-29 01:32:30,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:30,954 INFO L495 AbstractCegarLoop]: Abstraction has 1049 states and 1749 transitions. [2023-11-29 01:32:30,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:32:30,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1049 states and 1749 transitions. [2023-11-29 01:32:30,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2023-11-29 01:32:30,963 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:30,964 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:30,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 01:32:31,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:31,165 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:32:31,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:31,165 INFO L85 PathProgramCache]: Analyzing trace with hash -2065188185, now seen corresponding path program 1 times [2023-11-29 01:32:31,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:31,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578067082] [2023-11-29 01:32:31,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:31,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:31,273 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:31,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2131560780] [2023-11-29 01:32:31,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:31,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:31,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:31,275 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:31,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 01:32:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:31,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 1444 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:32:31,726 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:31,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 01:32:31,774 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:31,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:31,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578067082] [2023-11-29 01:32:31,775 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:31,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131560780] [2023-11-29 01:32:31,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131560780] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:31,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:31,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:32:31,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437830424] [2023-11-29 01:32:31,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:31,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:32:31,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:31,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:32:31,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:32:31,779 INFO L87 Difference]: Start difference. First operand 1049 states and 1749 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:32:31,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:31,926 INFO L93 Difference]: Finished difference Result 2475 states and 4098 transitions. [2023-11-29 01:32:31,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:32:31,926 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 602 [2023-11-29 01:32:31,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:31,940 INFO L225 Difference]: With dead ends: 2475 [2023-11-29 01:32:31,940 INFO L226 Difference]: Without dead ends: 1749 [2023-11-29 01:32:31,942 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 600 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 01:32:31,943 INFO L413 NwaCegarLoop]: 585 mSDtfsCounter, 510 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:31,943 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 1129 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:32:31,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1749 states. [2023-11-29 01:32:32,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1749 to 1081. [2023-11-29 01:32:32,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1081 states, 851 states have (on average 1.5898942420681552) internal successors, (1353), 852 states have internal predecessors, (1353), 225 states have call successors, (225), 4 states have call predecessors, (225), 4 states have return successors, (225), 224 states have call predecessors, (225), 225 states have call successors, (225) [2023-11-29 01:32:32,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1081 states to 1081 states and 1803 transitions. [2023-11-29 01:32:32,109 INFO L78 Accepts]: Start accepts. Automaton has 1081 states and 1803 transitions. Word has length 602 [2023-11-29 01:32:32,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:32,110 INFO L495 AbstractCegarLoop]: Abstraction has 1081 states and 1803 transitions. [2023-11-29 01:32:32,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:32:32,111 INFO L276 IsEmpty]: Start isEmpty. Operand 1081 states and 1803 transitions. [2023-11-29 01:32:32,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2023-11-29 01:32:32,117 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:32,118 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:32,127 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 01:32:32,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:32,325 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:32:32,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:32,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1200419813, now seen corresponding path program 1 times [2023-11-29 01:32:32,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:32,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490064938] [2023-11-29 01:32:32,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:32,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:32,402 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:32,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [478145442] [2023-11-29 01:32:32,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:32,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:32,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:32,404 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:32,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 01:32:32,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:32,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 1443 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:32:32,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:32,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 01:32:32,915 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:32,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:32,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490064938] [2023-11-29 01:32:32,916 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:32,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478145442] [2023-11-29 01:32:32,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478145442] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:32,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:32,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:32:32,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85051680] [2023-11-29 01:32:32,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:32,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:32:32,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:32,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:32:32,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:32:32,920 INFO L87 Difference]: Start difference. First operand 1081 states and 1803 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:32:33,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:33,070 INFO L93 Difference]: Finished difference Result 2597 states and 4316 transitions. [2023-11-29 01:32:33,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:32:33,071 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 602 [2023-11-29 01:32:33,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:33,086 INFO L225 Difference]: With dead ends: 2597 [2023-11-29 01:32:33,086 INFO L226 Difference]: Without dead ends: 1837 [2023-11-29 01:32:33,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 600 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 01:32:33,090 INFO L413 NwaCegarLoop]: 957 mSDtfsCounter, 540 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 1501 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 01:32:33,091 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [540 Valid, 1501 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:32:33,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1837 states. [2023-11-29 01:32:33,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1837 to 1237. [2023-11-29 01:32:33,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1237 states, 1007 states have (on average 1.621648460774578) internal successors, (1633), 1008 states have internal predecessors, (1633), 225 states have call successors, (225), 4 states have call predecessors, (225), 4 states have return successors, (225), 224 states have call predecessors, (225), 225 states have call successors, (225) [2023-11-29 01:32:33,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 2083 transitions. [2023-11-29 01:32:33,227 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 2083 transitions. Word has length 602 [2023-11-29 01:32:33,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:33,229 INFO L495 AbstractCegarLoop]: Abstraction has 1237 states and 2083 transitions. [2023-11-29 01:32:33,229 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:32:33,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 2083 transitions. [2023-11-29 01:32:33,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2023-11-29 01:32:33,236 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:33,237 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:33,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 01:32:33,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:33,438 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:32:33,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:33,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1066406307, now seen corresponding path program 1 times [2023-11-29 01:32:33,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:33,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109394859] [2023-11-29 01:32:33,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:33,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:33,529 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:33,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1516469973] [2023-11-29 01:32:33,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:33,530 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:33,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:33,532 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:33,535 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 01:32:33,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:33,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:32:34,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:34,061 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 01:32:34,062 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:34,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:34,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109394859] [2023-11-29 01:32:34,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:34,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516469973] [2023-11-29 01:32:34,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516469973] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:34,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:34,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:32:34,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399953219] [2023-11-29 01:32:34,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:34,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:32:34,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:34,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:32:34,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:32:34,066 INFO L87 Difference]: Start difference. First operand 1237 states and 2083 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:32:34,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:34,224 INFO L93 Difference]: Finished difference Result 2885 states and 4831 transitions. [2023-11-29 01:32:34,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:32:34,227 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 602 [2023-11-29 01:32:34,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:34,243 INFO L225 Difference]: With dead ends: 2885 [2023-11-29 01:32:34,243 INFO L226 Difference]: Without dead ends: 2065 [2023-11-29 01:32:34,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 600 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 01:32:34,248 INFO L413 NwaCegarLoop]: 565 mSDtfsCounter, 541 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 541 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:34,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [541 Valid, 1109 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:32:34,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2065 states. [2023-11-29 01:32:34,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2065 to 1309. [2023-11-29 01:32:34,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1309 states, 1079 states have (on average 1.6172381835032437) internal successors, (1745), 1080 states have internal predecessors, (1745), 225 states have call successors, (225), 4 states have call predecessors, (225), 4 states have return successors, (225), 224 states have call predecessors, (225), 225 states have call successors, (225) [2023-11-29 01:32:34,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1309 states to 1309 states and 2195 transitions. [2023-11-29 01:32:34,417 INFO L78 Accepts]: Start accepts. Automaton has 1309 states and 2195 transitions. Word has length 602 [2023-11-29 01:32:34,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:34,418 INFO L495 AbstractCegarLoop]: Abstraction has 1309 states and 2195 transitions. [2023-11-29 01:32:34,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:32:34,419 INFO L276 IsEmpty]: Start isEmpty. Operand 1309 states and 2195 transitions. [2023-11-29 01:32:34,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2023-11-29 01:32:34,426 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:34,426 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:34,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 01:32:34,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 01:32:34,627 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:32:34,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:34,628 INFO L85 PathProgramCache]: Analyzing trace with hash -319797087, now seen corresponding path program 1 times [2023-11-29 01:32:34,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:34,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219491324] [2023-11-29 01:32:34,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:34,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:34,718 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:34,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1279840800] [2023-11-29 01:32:34,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:34,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:34,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:34,720 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:34,725 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 01:32:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:35,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 1439 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:32:35,230 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:36,827 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 01:32:36,828 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:36,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:36,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219491324] [2023-11-29 01:32:36,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:36,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279840800] [2023-11-29 01:32:36,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279840800] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:36,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:36,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:32:36,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020069892] [2023-11-29 01:32:36,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:36,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:32:36,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:36,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:32:36,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:32:36,832 INFO L87 Difference]: Start difference. First operand 1309 states and 2195 transitions. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:32:37,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:37,073 INFO L93 Difference]: Finished difference Result 3519 states and 5921 transitions. [2023-11-29 01:32:37,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:32:37,074 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 602 [2023-11-29 01:32:37,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:37,088 INFO L225 Difference]: With dead ends: 3519 [2023-11-29 01:32:37,088 INFO L226 Difference]: Without dead ends: 2387 [2023-11-29 01:32:37,091 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 598 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:32:37,092 INFO L413 NwaCegarLoop]: 544 mSDtfsCounter, 382 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 2171 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:37,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 2171 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:32:37,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2023-11-29 01:32:37,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 2385. [2023-11-29 01:32:37,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2385 states, 2020 states have (on average 1.613861386138614) internal successors, (3260), 2022 states have internal predecessors, (3260), 358 states have call successors, (358), 6 states have call predecessors, (358), 6 states have return successors, (358), 356 states have call predecessors, (358), 358 states have call successors, (358) [2023-11-29 01:32:37,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2385 states to 2385 states and 3976 transitions. [2023-11-29 01:32:37,203 INFO L78 Accepts]: Start accepts. Automaton has 2385 states and 3976 transitions. Word has length 602 [2023-11-29 01:32:37,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:37,204 INFO L495 AbstractCegarLoop]: Abstraction has 2385 states and 3976 transitions. [2023-11-29 01:32:37,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:32:37,205 INFO L276 IsEmpty]: Start isEmpty. Operand 2385 states and 3976 transitions. [2023-11-29 01:32:37,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2023-11-29 01:32:37,232 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:37,233 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:37,242 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 01:32:37,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:37,434 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:32:37,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:37,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1946584099, now seen corresponding path program 1 times [2023-11-29 01:32:37,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:37,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210946433] [2023-11-29 01:32:37,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:37,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:37,505 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:37,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [461787305] [2023-11-29 01:32:37,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:37,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:37,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:37,507 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:37,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 01:32:37,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:37,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 1436 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:32:38,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:39,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 01:32:39,490 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:39,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:39,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210946433] [2023-11-29 01:32:39,490 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:39,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461787305] [2023-11-29 01:32:39,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461787305] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:39,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:39,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:32:39,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324149922] [2023-11-29 01:32:39,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:39,492 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 01:32:39,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:39,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 01:32:39,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 01:32:39,494 INFO L87 Difference]: Start difference. First operand 2385 states and 3976 transitions. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:32:39,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:39,760 INFO L93 Difference]: Finished difference Result 4087 states and 6806 transitions. [2023-11-29 01:32:39,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:32:39,761 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 602 [2023-11-29 01:32:39,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:39,780 INFO L225 Difference]: With dead ends: 4087 [2023-11-29 01:32:39,780 INFO L226 Difference]: Without dead ends: 2387 [2023-11-29 01:32:39,785 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 598 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 01:32:39,786 INFO L413 NwaCegarLoop]: 544 mSDtfsCounter, 377 mSDsluCounter, 1626 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 377 SdHoareTripleChecker+Valid, 2170 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:39,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [377 Valid, 2170 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:32:39,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2023-11-29 01:32:40,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 2385. [2023-11-29 01:32:40,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2385 states, 2020 states have (on average 1.60990099009901) internal successors, (3252), 2022 states have internal predecessors, (3252), 358 states have call successors, (358), 6 states have call predecessors, (358), 6 states have return successors, (358), 356 states have call predecessors, (358), 358 states have call successors, (358) [2023-11-29 01:32:40,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2385 states to 2385 states and 3968 transitions. [2023-11-29 01:32:40,031 INFO L78 Accepts]: Start accepts. Automaton has 2385 states and 3968 transitions. Word has length 602 [2023-11-29 01:32:40,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:40,032 INFO L495 AbstractCegarLoop]: Abstraction has 2385 states and 3968 transitions. [2023-11-29 01:32:40,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:32:40,033 INFO L276 IsEmpty]: Start isEmpty. Operand 2385 states and 3968 transitions. [2023-11-29 01:32:40,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2023-11-29 01:32:40,041 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:40,041 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:40,050 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 01:32:40,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:40,243 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:32:40,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:40,243 INFO L85 PathProgramCache]: Analyzing trace with hash -409221151, now seen corresponding path program 1 times [2023-11-29 01:32:40,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:40,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561337643] [2023-11-29 01:32:40,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:40,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:40,324 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:40,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [828633304] [2023-11-29 01:32:40,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:40,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:40,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:40,326 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:40,328 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 01:32:40,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:40,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 1433 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:32:40,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:40,850 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 01:32:40,850 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:40,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:40,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561337643] [2023-11-29 01:32:40,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:40,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828633304] [2023-11-29 01:32:40,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828633304] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:40,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:40,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:32:40,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577442491] [2023-11-29 01:32:40,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:40,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:32:40,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:40,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:32:40,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:32:40,855 INFO L87 Difference]: Start difference. First operand 2385 states and 3968 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:32:41,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:41,116 INFO L93 Difference]: Finished difference Result 6389 states and 10602 transitions. [2023-11-29 01:32:41,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 01:32:41,117 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 602 [2023-11-29 01:32:41,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:41,146 INFO L225 Difference]: With dead ends: 6389 [2023-11-29 01:32:41,147 INFO L226 Difference]: Without dead ends: 4517 [2023-11-29 01:32:41,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 599 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 01:32:41,153 INFO L413 NwaCegarLoop]: 663 mSDtfsCounter, 511 mSDsluCounter, 1205 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 1868 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:41,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [511 Valid, 1868 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:32:41,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4517 states. [2023-11-29 01:32:41,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4517 to 3481. [2023-11-29 01:32:41,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3481 states, 3116 states have (on average 1.6418485237483953) internal successors, (5116), 3118 states have internal predecessors, (5116), 358 states have call successors, (358), 6 states have call predecessors, (358), 6 states have return successors, (358), 356 states have call predecessors, (358), 358 states have call successors, (358) [2023-11-29 01:32:41,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3481 states to 3481 states and 5832 transitions. [2023-11-29 01:32:41,394 INFO L78 Accepts]: Start accepts. Automaton has 3481 states and 5832 transitions. Word has length 602 [2023-11-29 01:32:41,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:41,395 INFO L495 AbstractCegarLoop]: Abstraction has 3481 states and 5832 transitions. [2023-11-29 01:32:41,395 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:32:41,395 INFO L276 IsEmpty]: Start isEmpty. Operand 3481 states and 5832 transitions. [2023-11-29 01:32:41,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2023-11-29 01:32:41,404 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:41,404 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:41,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 01:32:41,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:41,605 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:32:41,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:41,605 INFO L85 PathProgramCache]: Analyzing trace with hash -463614049, now seen corresponding path program 1 times [2023-11-29 01:32:41,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:41,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803730807] [2023-11-29 01:32:41,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:41,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:41,671 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:41,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1398784927] [2023-11-29 01:32:41,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:41,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:41,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:41,672 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:41,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 01:32:42,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:42,061 INFO L262 TraceCheckSpWp]: Trace formula consists of 1434 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:32:42,068 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 01:32:42,121 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:42,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:42,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803730807] [2023-11-29 01:32:42,121 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:42,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398784927] [2023-11-29 01:32:42,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398784927] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:42,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:42,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:32:42,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680843265] [2023-11-29 01:32:42,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:42,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:32:42,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:42,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:32:42,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:32:42,125 INFO L87 Difference]: Start difference. First operand 3481 states and 5832 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:32:42,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:42,474 INFO L93 Difference]: Finished difference Result 11790 states and 19595 transitions. [2023-11-29 01:32:42,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:32:42,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 602 [2023-11-29 01:32:42,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:42,524 INFO L225 Difference]: With dead ends: 11790 [2023-11-29 01:32:42,524 INFO L226 Difference]: Without dead ends: 8483 [2023-11-29 01:32:42,532 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 600 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 01:32:42,533 INFO L413 NwaCegarLoop]: 842 mSDtfsCounter, 1369 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1369 SdHoareTripleChecker+Valid, 2012 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:42,533 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1369 Valid, 2012 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 01:32:42,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8483 states. [2023-11-29 01:32:42,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8483 to 6609. [2023-11-29 01:32:42,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6609 states, 6092 states have (on average 1.6474064346684176) internal successors, (10036), 6098 states have internal predecessors, (10036), 506 states have call successors, (506), 10 states have call predecessors, (506), 10 states have return successors, (506), 500 states have call predecessors, (506), 506 states have call successors, (506) [2023-11-29 01:32:42,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6609 states to 6609 states and 11048 transitions. [2023-11-29 01:32:42,947 INFO L78 Accepts]: Start accepts. Automaton has 6609 states and 11048 transitions. Word has length 602 [2023-11-29 01:32:42,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:42,948 INFO L495 AbstractCegarLoop]: Abstraction has 6609 states and 11048 transitions. [2023-11-29 01:32:42,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:32:42,948 INFO L276 IsEmpty]: Start isEmpty. Operand 6609 states and 11048 transitions. [2023-11-29 01:32:42,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2023-11-29 01:32:42,960 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:42,960 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:42,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 01:32:43,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:43,161 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:32:43,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:43,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1679767775, now seen corresponding path program 1 times [2023-11-29 01:32:43,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:43,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785541765] [2023-11-29 01:32:43,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:43,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:43,219 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:43,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [636994504] [2023-11-29 01:32:43,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:43,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:43,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:43,221 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:43,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 01:32:43,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:43,587 INFO L262 TraceCheckSpWp]: Trace formula consists of 1435 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:32:43,595 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:43,617 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 01:32:43,617 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:43,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:43,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785541765] [2023-11-29 01:32:43,617 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:43,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636994504] [2023-11-29 01:32:43,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636994504] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:43,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:43,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:32:43,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319792365] [2023-11-29 01:32:43,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:43,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:32:43,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:43,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:32:43,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:32:43,621 INFO L87 Difference]: Start difference. First operand 6609 states and 11048 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:32:43,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:43,980 INFO L93 Difference]: Finished difference Result 18421 states and 30767 transitions. [2023-11-29 01:32:43,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:32:43,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 602 [2023-11-29 01:32:43,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:44,019 INFO L225 Difference]: With dead ends: 18421 [2023-11-29 01:32:44,019 INFO L226 Difference]: Without dead ends: 12091 [2023-11-29 01:32:44,034 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 600 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 01:32:44,034 INFO L413 NwaCegarLoop]: 691 mSDtfsCounter, 372 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 1237 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:44,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 1237 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 01:32:44,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12091 states. [2023-11-29 01:32:44,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12091 to 12087. [2023-11-29 01:32:44,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12087 states, 11237 states have (on average 1.6457239476728664) internal successors, (18493), 11251 states have internal predecessors, (18493), 830 states have call successors, (830), 19 states have call predecessors, (830), 19 states have return successors, (830), 816 states have call predecessors, (830), 830 states have call successors, (830) [2023-11-29 01:32:44,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12087 states to 12087 states and 20153 transitions. [2023-11-29 01:32:44,601 INFO L78 Accepts]: Start accepts. Automaton has 12087 states and 20153 transitions. Word has length 602 [2023-11-29 01:32:44,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:44,602 INFO L495 AbstractCegarLoop]: Abstraction has 12087 states and 20153 transitions. [2023-11-29 01:32:44,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:32:44,603 INFO L276 IsEmpty]: Start isEmpty. Operand 12087 states and 20153 transitions. [2023-11-29 01:32:44,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 603 [2023-11-29 01:32:44,620 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:44,620 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:44,629 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 01:32:44,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:44,821 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:32:44,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:44,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1883232095, now seen corresponding path program 1 times [2023-11-29 01:32:44,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:44,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393645977] [2023-11-29 01:32:44,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:44,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:44,887 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:44,887 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1187609714] [2023-11-29 01:32:44,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:44,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:44,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:44,889 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:44,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 01:32:45,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:45,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 1436 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:32:45,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:45,838 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 8373 proven. 150 refuted. 0 times theorem prover too weak. 8221 trivial. 0 not checked. [2023-11-29 01:32:45,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:32:46,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 123 proven. 150 refuted. 0 times theorem prover too weak. 16471 trivial. 0 not checked. [2023-11-29 01:32:46,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:46,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393645977] [2023-11-29 01:32:46,270 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:46,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187609714] [2023-11-29 01:32:46,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187609714] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:32:46,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:32:46,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 01:32:46,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104630990] [2023-11-29 01:32:46,271 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:32:46,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:32:46,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:46,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:32:46,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:32:46,274 INFO L87 Difference]: Start difference. First operand 12087 states and 20153 transitions. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 2 states have call successors, (142), 2 states have call predecessors, (142), 4 states have return successors, (143), 2 states have call predecessors, (143), 2 states have call successors, (143) [2023-11-29 01:32:47,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:47,204 INFO L93 Difference]: Finished difference Result 15629 states and 25971 transitions. [2023-11-29 01:32:47,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:32:47,205 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 2 states have call successors, (142), 2 states have call predecessors, (142), 4 states have return successors, (143), 2 states have call predecessors, (143), 2 states have call successors, (143) Word has length 602 [2023-11-29 01:32:47,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:47,221 INFO L225 Difference]: With dead ends: 15629 [2023-11-29 01:32:47,221 INFO L226 Difference]: Without dead ends: 6315 [2023-11-29 01:32:47,234 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1206 GetRequests, 1196 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 01:32:47,235 INFO L413 NwaCegarLoop]: 449 mSDtfsCounter, 376 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 417 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:47,235 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [417 Valid, 1161 Invalid, 513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 01:32:47,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6315 states. [2023-11-29 01:32:47,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6315 to 6291. [2023-11-29 01:32:47,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6291 states, 5752 states have (on average 1.629172461752434) internal successors, (9371), 5758 states have internal predecessors, (9371), 518 states have call successors, (518), 20 states have call predecessors, (518), 20 states have return successors, (518), 512 states have call predecessors, (518), 518 states have call successors, (518) [2023-11-29 01:32:47,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6291 states to 6291 states and 10407 transitions. [2023-11-29 01:32:47,520 INFO L78 Accepts]: Start accepts. Automaton has 6291 states and 10407 transitions. Word has length 602 [2023-11-29 01:32:47,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:47,521 INFO L495 AbstractCegarLoop]: Abstraction has 6291 states and 10407 transitions. [2023-11-29 01:32:47,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 2 states have call successors, (142), 2 states have call predecessors, (142), 4 states have return successors, (143), 2 states have call predecessors, (143), 2 states have call successors, (143) [2023-11-29 01:32:47,521 INFO L276 IsEmpty]: Start isEmpty. Operand 6291 states and 10407 transitions. [2023-11-29 01:32:47,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-29 01:32:47,531 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:47,531 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:47,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 01:32:47,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 01:32:47,732 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:32:47,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:47,733 INFO L85 PathProgramCache]: Analyzing trace with hash 845380456, now seen corresponding path program 1 times [2023-11-29 01:32:47,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:47,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738866448] [2023-11-29 01:32:47,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:47,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:47,803 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:47,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665859646] [2023-11-29 01:32:47,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:47,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:47,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:47,805 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:47,809 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 01:32:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:48,209 INFO L262 TraceCheckSpWp]: Trace formula consists of 1434 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 01:32:48,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:49,034 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 01:32:49,034 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:49,034 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:49,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738866448] [2023-11-29 01:32:49,034 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:49,034 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665859646] [2023-11-29 01:32:49,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665859646] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:49,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:49,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 01:32:49,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741034282] [2023-11-29 01:32:49,035 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:49,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:32:49,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:49,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:32:49,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:32:49,038 INFO L87 Difference]: Start difference. First operand 6291 states and 10407 transitions. Second operand has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:32:50,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:50,419 INFO L93 Difference]: Finished difference Result 18043 states and 29790 transitions. [2023-11-29 01:32:50,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 01:32:50,420 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 604 [2023-11-29 01:32:50,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:50,443 INFO L225 Difference]: With dead ends: 18043 [2023-11-29 01:32:50,443 INFO L226 Difference]: Without dead ends: 13785 [2023-11-29 01:32:50,451 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 598 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:32:50,452 INFO L413 NwaCegarLoop]: 626 mSDtfsCounter, 2672 mSDsluCounter, 2886 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 362 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2672 SdHoareTripleChecker+Valid, 3512 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 362 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:50,452 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2672 Valid, 3512 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [362 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 01:32:50,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13785 states. [2023-11-29 01:32:50,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13785 to 11387. [2023-11-29 01:32:50,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11387 states, 10848 states have (on average 1.6560656342182891) internal successors, (17965), 10854 states have internal predecessors, (17965), 518 states have call successors, (518), 20 states have call predecessors, (518), 20 states have return successors, (518), 512 states have call predecessors, (518), 518 states have call successors, (518) [2023-11-29 01:32:51,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11387 states to 11387 states and 19001 transitions. [2023-11-29 01:32:51,048 INFO L78 Accepts]: Start accepts. Automaton has 11387 states and 19001 transitions. Word has length 604 [2023-11-29 01:32:51,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:51,050 INFO L495 AbstractCegarLoop]: Abstraction has 11387 states and 19001 transitions. [2023-11-29 01:32:51,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:32:51,050 INFO L276 IsEmpty]: Start isEmpty. Operand 11387 states and 19001 transitions. [2023-11-29 01:32:51,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-29 01:32:51,065 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:51,066 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:51,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 01:32:51,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 01:32:51,267 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:32:51,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:51,267 INFO L85 PathProgramCache]: Analyzing trace with hash -370773270, now seen corresponding path program 1 times [2023-11-29 01:32:51,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:51,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316181073] [2023-11-29 01:32:51,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:51,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:51,346 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:51,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [963552853] [2023-11-29 01:32:51,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:51,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:51,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:51,348 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:51,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 01:32:51,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:51,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 1435 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:32:51,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:52,177 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 8461 proven. 138 refuted. 0 times theorem prover too weak. 8145 trivial. 0 not checked. [2023-11-29 01:32:52,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:32:52,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 135 proven. 138 refuted. 0 times theorem prover too weak. 16471 trivial. 0 not checked. [2023-11-29 01:32:52,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:52,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316181073] [2023-11-29 01:32:52,533 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:52,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [963552853] [2023-11-29 01:32:52,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [963552853] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:32:52,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:32:52,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 01:32:52,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820766586] [2023-11-29 01:32:52,535 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:32:52,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:32:52,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:52,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:32:52,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:32:52,538 INFO L87 Difference]: Start difference. First operand 11387 states and 19001 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 2 states have call successors, (138), 2 states have call predecessors, (138), 4 states have return successors, (139), 2 states have call predecessors, (139), 2 states have call successors, (139) [2023-11-29 01:32:53,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:53,476 INFO L93 Difference]: Finished difference Result 18525 states and 30775 transitions. [2023-11-29 01:32:53,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 01:32:53,477 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 2 states have call successors, (138), 2 states have call predecessors, (138), 4 states have return successors, (139), 2 states have call predecessors, (139), 2 states have call successors, (139) Word has length 604 [2023-11-29 01:32:53,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:53,497 INFO L225 Difference]: With dead ends: 18525 [2023-11-29 01:32:53,498 INFO L226 Difference]: Without dead ends: 7366 [2023-11-29 01:32:53,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1210 GetRequests, 1200 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:32:53,513 INFO L413 NwaCegarLoop]: 522 mSDtfsCounter, 682 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 785 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 727 SdHoareTripleChecker+Valid, 1323 SdHoareTripleChecker+Invalid, 895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:53,513 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [727 Valid, 1323 Invalid, 895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 785 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 01:32:53,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7366 states. [2023-11-29 01:32:54,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7366 to 7323. [2023-11-29 01:32:54,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7323 states, 6779 states have (on average 1.6121846880070807) internal successors, (10929), 6785 states have internal predecessors, (10929), 518 states have call successors, (518), 25 states have call predecessors, (518), 25 states have return successors, (518), 512 states have call predecessors, (518), 518 states have call successors, (518) [2023-11-29 01:32:54,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7323 states to 7323 states and 11965 transitions. [2023-11-29 01:32:54,054 INFO L78 Accepts]: Start accepts. Automaton has 7323 states and 11965 transitions. Word has length 604 [2023-11-29 01:32:54,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:54,056 INFO L495 AbstractCegarLoop]: Abstraction has 7323 states and 11965 transitions. [2023-11-29 01:32:54,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 2 states have call successors, (138), 2 states have call predecessors, (138), 4 states have return successors, (139), 2 states have call predecessors, (139), 2 states have call successors, (139) [2023-11-29 01:32:54,056 INFO L276 IsEmpty]: Start isEmpty. Operand 7323 states and 11965 transitions. [2023-11-29 01:32:54,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-29 01:32:54,067 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:54,067 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:54,076 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-29 01:32:54,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 01:32:54,268 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:32:54,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:54,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1924632825, now seen corresponding path program 1 times [2023-11-29 01:32:54,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:54,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114726074] [2023-11-29 01:32:54,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:54,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:54,337 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:54,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1497208990] [2023-11-29 01:32:54,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:54,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:54,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:54,339 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:54,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 01:32:54,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:54,879 INFO L262 TraceCheckSpWp]: Trace formula consists of 1438 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:32:54,885 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:55,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 8457 proven. 132 refuted. 0 times theorem prover too weak. 8155 trivial. 0 not checked. [2023-11-29 01:32:55,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:32:55,554 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 141 proven. 132 refuted. 0 times theorem prover too weak. 16471 trivial. 0 not checked. [2023-11-29 01:32:55,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:55,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114726074] [2023-11-29 01:32:55,555 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:55,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497208990] [2023-11-29 01:32:55,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497208990] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:32:55,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:32:55,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 01:32:55,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644107480] [2023-11-29 01:32:55,556 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:32:55,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 01:32:55,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:55,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 01:32:55,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 01:32:55,559 INFO L87 Difference]: Start difference. First operand 7323 states and 11965 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 2 states have call successors, (136), 2 states have call predecessors, (136), 4 states have return successors, (137), 2 states have call predecessors, (137), 2 states have call successors, (137) [2023-11-29 01:32:56,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:56,365 INFO L93 Difference]: Finished difference Result 9683 states and 15802 transitions. [2023-11-29 01:32:56,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 01:32:56,365 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 2 states have call successors, (136), 2 states have call predecessors, (136), 4 states have return successors, (137), 2 states have call predecessors, (137), 2 states have call successors, (137) Word has length 604 [2023-11-29 01:32:56,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:56,373 INFO L225 Difference]: With dead ends: 9683 [2023-11-29 01:32:56,373 INFO L226 Difference]: Without dead ends: 3783 [2023-11-29 01:32:56,380 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1210 GetRequests, 1200 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 01:32:56,381 INFO L413 NwaCegarLoop]: 525 mSDtfsCounter, 685 mSDsluCounter, 748 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 732 SdHoareTripleChecker+Valid, 1273 SdHoareTripleChecker+Invalid, 735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:56,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [732 Valid, 1273 Invalid, 735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 01:32:56,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3783 states. [2023-11-29 01:32:56,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3783 to 3767. [2023-11-29 01:32:56,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3767 states, 3398 states have (on average 1.5897586815773985) internal successors, (5402), 3400 states have internal predecessors, (5402), 350 states have call successors, (350), 18 states have call predecessors, (350), 18 states have return successors, (350), 348 states have call predecessors, (350), 350 states have call successors, (350) [2023-11-29 01:32:56,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 6102 transitions. [2023-11-29 01:32:56,532 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 6102 transitions. Word has length 604 [2023-11-29 01:32:56,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:56,533 INFO L495 AbstractCegarLoop]: Abstraction has 3767 states and 6102 transitions. [2023-11-29 01:32:56,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 2 states have call successors, (136), 2 states have call predecessors, (136), 4 states have return successors, (137), 2 states have call predecessors, (137), 2 states have call successors, (137) [2023-11-29 01:32:56,533 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 6102 transitions. [2023-11-29 01:32:56,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-29 01:32:56,539 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:56,540 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:56,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 01:32:56,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 01:32:56,741 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:32:56,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:56,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1061090615, now seen corresponding path program 1 times [2023-11-29 01:32:56,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:56,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87928332] [2023-11-29 01:32:56,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:56,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:56,821 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:56,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1831983141] [2023-11-29 01:32:56,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:56,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:56,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:56,823 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:56,826 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 01:32:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:57,310 INFO L262 TraceCheckSpWp]: Trace formula consists of 1435 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 01:32:57,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 01:32:57,376 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:32:57,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:57,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87928332] [2023-11-29 01:32:57,376 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:57,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831983141] [2023-11-29 01:32:57,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831983141] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:32:57,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:32:57,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 01:32:57,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976881054] [2023-11-29 01:32:57,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:32:57,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 01:32:57,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:57,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 01:32:57,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 01:32:57,379 INFO L87 Difference]: Start difference. First operand 3767 states and 6102 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:32:57,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:57,575 INFO L93 Difference]: Finished difference Result 7405 states and 12080 transitions. [2023-11-29 01:32:57,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 01:32:57,575 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 604 [2023-11-29 01:32:57,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:57,580 INFO L225 Difference]: With dead ends: 7405 [2023-11-29 01:32:57,581 INFO L226 Difference]: Without dead ends: 4523 [2023-11-29 01:32:57,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 603 GetRequests, 602 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 01:32:57,584 INFO L413 NwaCegarLoop]: 702 mSDtfsCounter, 343 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 1227 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:57,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [343 Valid, 1227 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 01:32:57,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4523 states. [2023-11-29 01:32:57,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4523 to 3422. [2023-11-29 01:32:57,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3422 states, 3126 states have (on average 1.6276391554702496) internal successors, (5088), 3126 states have internal predecessors, (5088), 276 states have call successors, (276), 19 states have call predecessors, (276), 19 states have return successors, (276), 276 states have call predecessors, (276), 276 states have call successors, (276) [2023-11-29 01:32:57,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3422 states to 3422 states and 5640 transitions. [2023-11-29 01:32:57,717 INFO L78 Accepts]: Start accepts. Automaton has 3422 states and 5640 transitions. Word has length 604 [2023-11-29 01:32:57,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:57,718 INFO L495 AbstractCegarLoop]: Abstraction has 3422 states and 5640 transitions. [2023-11-29 01:32:57,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:32:57,718 INFO L276 IsEmpty]: Start isEmpty. Operand 3422 states and 5640 transitions. [2023-11-29 01:32:57,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-29 01:32:57,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:57,725 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:57,733 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-29 01:32:57,925 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 01:32:57,926 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:32:57,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:57,926 INFO L85 PathProgramCache]: Analyzing trace with hash -637443893, now seen corresponding path program 1 times [2023-11-29 01:32:57,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:57,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726730530] [2023-11-29 01:32:57,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:57,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:32:58,005 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:32:58,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061569069] [2023-11-29 01:32:58,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:58,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:32:58,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:32:58,006 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:32:58,009 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 01:32:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:32:58,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 1436 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 01:32:58,535 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:32:58,669 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 6111 proven. 63 refuted. 0 times theorem prover too weak. 10570 trivial. 0 not checked. [2023-11-29 01:32:58,669 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:32:58,917 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 210 proven. 63 refuted. 0 times theorem prover too weak. 16471 trivial. 0 not checked. [2023-11-29 01:32:58,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:32:58,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726730530] [2023-11-29 01:32:58,917 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:32:58,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061569069] [2023-11-29 01:32:58,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061569069] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:32:58,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:32:58,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-29 01:32:58,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835640256] [2023-11-29 01:32:58,919 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:32:58,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:32:58,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:32:58,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:32:58,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:32:58,922 INFO L87 Difference]: Start difference. First operand 3422 states and 5640 transitions. Second operand has 8 states, 8 states have (on average 21.5) internal successors, (172), 8 states have internal predecessors, (172), 3 states have call successors, (113), 2 states have call predecessors, (113), 4 states have return successors, (114), 3 states have call predecessors, (114), 3 states have call successors, (114) [2023-11-29 01:32:59,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:32:59,579 INFO L93 Difference]: Finished difference Result 6318 states and 10399 transitions. [2023-11-29 01:32:59,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 01:32:59,580 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 21.5) internal successors, (172), 8 states have internal predecessors, (172), 3 states have call successors, (113), 2 states have call predecessors, (113), 4 states have return successors, (114), 3 states have call predecessors, (114), 3 states have call successors, (114) Word has length 604 [2023-11-29 01:32:59,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:32:59,585 INFO L225 Difference]: With dead ends: 6318 [2023-11-29 01:32:59,585 INFO L226 Difference]: Without dead ends: 3370 [2023-11-29 01:32:59,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1210 GetRequests, 1200 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-29 01:32:59,590 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 1108 mSDsluCounter, 701 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:32:59,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1178 Valid, 1145 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 01:32:59,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3370 states. [2023-11-29 01:32:59,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3370 to 3352. [2023-11-29 01:32:59,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3352 states, 3053 states have (on average 1.6259416966917786) internal successors, (4964), 3053 states have internal predecessors, (4964), 276 states have call successors, (276), 22 states have call predecessors, (276), 22 states have return successors, (276), 276 states have call predecessors, (276), 276 states have call successors, (276) [2023-11-29 01:32:59,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3352 states to 3352 states and 5516 transitions. [2023-11-29 01:32:59,766 INFO L78 Accepts]: Start accepts. Automaton has 3352 states and 5516 transitions. Word has length 604 [2023-11-29 01:32:59,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:32:59,767 INFO L495 AbstractCegarLoop]: Abstraction has 3352 states and 5516 transitions. [2023-11-29 01:32:59,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 21.5) internal successors, (172), 8 states have internal predecessors, (172), 3 states have call successors, (113), 2 states have call predecessors, (113), 4 states have return successors, (114), 3 states have call predecessors, (114), 3 states have call successors, (114) [2023-11-29 01:32:59,768 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states and 5516 transitions. [2023-11-29 01:32:59,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-29 01:32:59,774 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:32:59,774 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:32:59,782 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 01:32:59,975 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 01:32:59,975 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:32:59,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:32:59,976 INFO L85 PathProgramCache]: Analyzing trace with hash -856305856, now seen corresponding path program 1 times [2023-11-29 01:32:59,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:32:59,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50062766] [2023-11-29 01:32:59,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:32:59,976 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:00,032 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:00,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1526373680] [2023-11-29 01:33:00,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:00,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:00,033 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:00,034 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:00,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 01:33:00,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:00,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 1433 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 01:33:00,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 01:33:00,581 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:33:00,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:00,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50062766] [2023-11-29 01:33:00,581 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:00,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526373680] [2023-11-29 01:33:00,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526373680] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:33:00,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:33:00,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 01:33:00,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490018482] [2023-11-29 01:33:00,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:33:00,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 01:33:00,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:00,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 01:33:00,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 01:33:00,584 INFO L87 Difference]: Start difference. First operand 3352 states and 5516 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:33:01,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:01,104 INFO L93 Difference]: Finished difference Result 6046 states and 9855 transitions. [2023-11-29 01:33:01,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 01:33:01,105 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 604 [2023-11-29 01:33:01,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:01,111 INFO L225 Difference]: With dead ends: 6046 [2023-11-29 01:33:01,111 INFO L226 Difference]: Without dead ends: 3409 [2023-11-29 01:33:01,115 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 602 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 01:33:01,115 INFO L413 NwaCegarLoop]: 779 mSDtfsCounter, 816 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 816 SdHoareTripleChecker+Valid, 1466 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:01,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [816 Valid, 1466 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 01:33:01,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3409 states. [2023-11-29 01:33:01,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3409 to 2392. [2023-11-29 01:33:01,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2392 states, 2093 states have (on average 1.5489727663640707) internal successors, (3242), 2093 states have internal predecessors, (3242), 276 states have call successors, (276), 22 states have call predecessors, (276), 22 states have return successors, (276), 276 states have call predecessors, (276), 276 states have call successors, (276) [2023-11-29 01:33:01,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2392 states to 2392 states and 3794 transitions. [2023-11-29 01:33:01,261 INFO L78 Accepts]: Start accepts. Automaton has 2392 states and 3794 transitions. Word has length 604 [2023-11-29 01:33:01,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:01,262 INFO L495 AbstractCegarLoop]: Abstraction has 2392 states and 3794 transitions. [2023-11-29 01:33:01,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:33:01,262 INFO L276 IsEmpty]: Start isEmpty. Operand 2392 states and 3794 transitions. [2023-11-29 01:33:01,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-29 01:33:01,268 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:01,268 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:33:01,276 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 01:33:01,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 01:33:01,469 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:33:01,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:01,469 INFO L85 PathProgramCache]: Analyzing trace with hash -432659134, now seen corresponding path program 1 times [2023-11-29 01:33:01,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:01,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796426653] [2023-11-29 01:33:01,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:01,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:01,543 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:01,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1884092504] [2023-11-29 01:33:01,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:01,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:01,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:01,545 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:01,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 01:33:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:02,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 1434 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:33:02,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:02,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 8331 proven. 153 refuted. 0 times theorem prover too weak. 8260 trivial. 0 not checked. [2023-11-29 01:33:02,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:33:02,932 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 120 proven. 153 refuted. 0 times theorem prover too weak. 16471 trivial. 0 not checked. [2023-11-29 01:33:02,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:02,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796426653] [2023-11-29 01:33:02,933 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:02,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884092504] [2023-11-29 01:33:02,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884092504] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:33:02,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:33:02,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-29 01:33:02,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317807324] [2023-11-29 01:33:02,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:33:02,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:33:02,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:02,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:33:02,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:33:02,937 INFO L87 Difference]: Start difference. First operand 2392 states and 3794 transitions. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 2 states have call successors, (143), 2 states have call predecessors, (143), 4 states have return successors, (144), 2 states have call predecessors, (144), 2 states have call successors, (144) [2023-11-29 01:33:04,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:04,294 INFO L93 Difference]: Finished difference Result 5858 states and 9241 transitions. [2023-11-29 01:33:04,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 01:33:04,294 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 2 states have call successors, (143), 2 states have call predecessors, (143), 4 states have return successors, (144), 2 states have call predecessors, (144), 2 states have call successors, (144) Word has length 604 [2023-11-29 01:33:04,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:04,300 INFO L225 Difference]: With dead ends: 5858 [2023-11-29 01:33:04,301 INFO L226 Difference]: Without dead ends: 4125 [2023-11-29 01:33:04,303 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1218 GetRequests, 1199 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-29 01:33:04,303 INFO L413 NwaCegarLoop]: 715 mSDtfsCounter, 1715 mSDsluCounter, 1488 mSDsCounter, 0 mSdLazyCounter, 1086 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1756 SdHoareTripleChecker+Valid, 2203 SdHoareTripleChecker+Invalid, 1452 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 1086 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:04,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1756 Valid, 2203 Invalid, 1452 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 1086 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 01:33:04,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4125 states. [2023-11-29 01:33:04,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4125 to 2674. [2023-11-29 01:33:04,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2674 states, 2372 states have (on average 1.5333052276559864) internal successors, (3637), 2372 states have internal predecessors, (3637), 276 states have call successors, (276), 25 states have call predecessors, (276), 25 states have return successors, (276), 276 states have call predecessors, (276), 276 states have call successors, (276) [2023-11-29 01:33:04,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2674 states to 2674 states and 4189 transitions. [2023-11-29 01:33:04,446 INFO L78 Accepts]: Start accepts. Automaton has 2674 states and 4189 transitions. Word has length 604 [2023-11-29 01:33:04,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:04,447 INFO L495 AbstractCegarLoop]: Abstraction has 2674 states and 4189 transitions. [2023-11-29 01:33:04,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 2 states have call successors, (143), 2 states have call predecessors, (143), 4 states have return successors, (144), 2 states have call predecessors, (144), 2 states have call successors, (144) [2023-11-29 01:33:04,447 INFO L276 IsEmpty]: Start isEmpty. Operand 2674 states and 4189 transitions. [2023-11-29 01:33:04,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 605 [2023-11-29 01:33:04,453 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:04,453 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:33:04,461 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 01:33:04,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:04,654 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:33:04,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:04,654 INFO L85 PathProgramCache]: Analyzing trace with hash -410026880, now seen corresponding path program 1 times [2023-11-29 01:33:04,654 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:04,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250532601] [2023-11-29 01:33:04,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:04,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:04,717 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:04,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1296718430] [2023-11-29 01:33:04,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:04,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:04,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:04,719 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:04,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 01:33:05,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:05,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 1435 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 01:33:05,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16744 trivial. 0 not checked. [2023-11-29 01:33:05,535 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 01:33:05,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:05,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250532601] [2023-11-29 01:33:05,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:05,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296718430] [2023-11-29 01:33:05,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296718430] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 01:33:05,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 01:33:05,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 01:33:05,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167127234] [2023-11-29 01:33:05,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 01:33:05,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 01:33:05,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:05,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 01:33:05,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-29 01:33:05,539 INFO L87 Difference]: Start difference. First operand 2674 states and 4189 transitions. Second operand has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:33:08,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:08,200 INFO L93 Difference]: Finished difference Result 9364 states and 14580 transitions. [2023-11-29 01:33:08,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 01:33:08,201 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) Word has length 604 [2023-11-29 01:33:08,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:08,211 INFO L225 Difference]: With dead ends: 9364 [2023-11-29 01:33:08,211 INFO L226 Difference]: Without dead ends: 7418 [2023-11-29 01:33:08,215 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 615 GetRequests, 602 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2023-11-29 01:33:08,216 INFO L413 NwaCegarLoop]: 886 mSDtfsCounter, 2865 mSDsluCounter, 3268 mSDsCounter, 0 mSdLazyCounter, 1053 mSolverCounterSat, 1035 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2865 SdHoareTripleChecker+Valid, 4154 SdHoareTripleChecker+Invalid, 2088 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1035 IncrementalHoareTripleChecker+Valid, 1053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:08,216 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2865 Valid, 4154 Invalid, 2088 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1035 Valid, 1053 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 01:33:08,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7418 states. [2023-11-29 01:33:08,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7418 to 3879. [2023-11-29 01:33:08,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3879 states, 3477 states have (on average 1.545010066148979) internal successors, (5372), 3477 states have internal predecessors, (5372), 368 states have call successors, (368), 33 states have call predecessors, (368), 33 states have return successors, (368), 368 states have call predecessors, (368), 368 states have call successors, (368) [2023-11-29 01:33:08,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3879 states to 3879 states and 6108 transitions. [2023-11-29 01:33:08,512 INFO L78 Accepts]: Start accepts. Automaton has 3879 states and 6108 transitions. Word has length 604 [2023-11-29 01:33:08,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:08,513 INFO L495 AbstractCegarLoop]: Abstraction has 3879 states and 6108 transitions. [2023-11-29 01:33:08,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.375) internal successors, (147), 8 states have internal predecessors, (147), 1 states have call successors, (92), 1 states have call predecessors, (92), 1 states have return successors, (92), 1 states have call predecessors, (92), 1 states have call successors, (92) [2023-11-29 01:33:08,514 INFO L276 IsEmpty]: Start isEmpty. Operand 3879 states and 6108 transitions. [2023-11-29 01:33:08,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 606 [2023-11-29 01:33:08,521 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:08,521 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:33:08,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 01:33:08,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:08,722 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:33:08,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:08,722 INFO L85 PathProgramCache]: Analyzing trace with hash -1234886925, now seen corresponding path program 1 times [2023-11-29 01:33:08,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:08,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569154199] [2023-11-29 01:33:08,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:08,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:08,779 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:08,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1964646884] [2023-11-29 01:33:08,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:08,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:08,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:08,781 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:08,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 01:33:09,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:09,273 INFO L262 TraceCheckSpWp]: Trace formula consists of 1435 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 01:33:09,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:11,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 9205 proven. 573 refuted. 0 times theorem prover too weak. 6966 trivial. 0 not checked. [2023-11-29 01:33:11,329 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:33:11,971 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 228 proven. 582 refuted. 0 times theorem prover too weak. 15934 trivial. 0 not checked. [2023-11-29 01:33:11,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:11,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569154199] [2023-11-29 01:33:11,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:11,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964646884] [2023-11-29 01:33:11,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1964646884] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:33:11,972 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:33:11,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2023-11-29 01:33:11,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813606205] [2023-11-29 01:33:11,973 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:33:11,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 01:33:11,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:11,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 01:33:11,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=338, Unknown=0, NotChecked=0, Total=462 [2023-11-29 01:33:11,976 INFO L87 Difference]: Start difference. First operand 3879 states and 6108 transitions. Second operand has 22 states, 22 states have (on average 10.863636363636363) internal successors, (239), 22 states have internal predecessors, (239), 7 states have call successors, (172), 4 states have call predecessors, (172), 10 states have return successors, (173), 7 states have call predecessors, (173), 7 states have call successors, (173) [2023-11-29 01:33:13,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:13,238 INFO L93 Difference]: Finished difference Result 7619 states and 11957 transitions. [2023-11-29 01:33:13,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 01:33:13,239 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 10.863636363636363) internal successors, (239), 22 states have internal predecessors, (239), 7 states have call successors, (172), 4 states have call predecessors, (172), 10 states have return successors, (173), 7 states have call predecessors, (173), 7 states have call successors, (173) Word has length 605 [2023-11-29 01:33:13,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:13,244 INFO L225 Difference]: With dead ends: 7619 [2023-11-29 01:33:13,244 INFO L226 Difference]: Without dead ends: 3975 [2023-11-29 01:33:13,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1217 GetRequests, 1188 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=649, Unknown=0, NotChecked=0, Total=930 [2023-11-29 01:33:13,247 INFO L413 NwaCegarLoop]: 403 mSDtfsCounter, 1839 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 1251 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1850 SdHoareTripleChecker+Valid, 1549 SdHoareTripleChecker+Invalid, 1439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 1251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:13,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1850 Valid, 1549 Invalid, 1439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 1251 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 01:33:13,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3975 states. [2023-11-29 01:33:13,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3975 to 3927. [2023-11-29 01:33:13,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3927 states, 3513 states have (on average 1.5345858240819812) internal successors, (5391), 3513 states have internal predecessors, (5391), 368 states have call successors, (368), 45 states have call predecessors, (368), 45 states have return successors, (368), 368 states have call predecessors, (368), 368 states have call successors, (368) [2023-11-29 01:33:13,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3927 states to 3927 states and 6127 transitions. [2023-11-29 01:33:13,447 INFO L78 Accepts]: Start accepts. Automaton has 3927 states and 6127 transitions. Word has length 605 [2023-11-29 01:33:13,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:13,448 INFO L495 AbstractCegarLoop]: Abstraction has 3927 states and 6127 transitions. [2023-11-29 01:33:13,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 10.863636363636363) internal successors, (239), 22 states have internal predecessors, (239), 7 states have call successors, (172), 4 states have call predecessors, (172), 10 states have return successors, (173), 7 states have call predecessors, (173), 7 states have call successors, (173) [2023-11-29 01:33:13,448 INFO L276 IsEmpty]: Start isEmpty. Operand 3927 states and 6127 transitions. [2023-11-29 01:33:13,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2023-11-29 01:33:13,455 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:13,455 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:33:13,462 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 01:33:13,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 01:33:13,656 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:33:13,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:13,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1124175485, now seen corresponding path program 1 times [2023-11-29 01:33:13,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:13,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241462435] [2023-11-29 01:33:13,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:13,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:13,708 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:13,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1501376875] [2023-11-29 01:33:13,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:13,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:13,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:13,709 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:13,711 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 01:33:14,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:14,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 1436 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 01:33:14,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 7407 proven. 87 refuted. 0 times theorem prover too weak. 9250 trivial. 0 not checked. [2023-11-29 01:33:15,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:33:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 186 proven. 87 refuted. 0 times theorem prover too weak. 16471 trivial. 0 not checked. [2023-11-29 01:33:15,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:15,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241462435] [2023-11-29 01:33:15,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:15,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501376875] [2023-11-29 01:33:15,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501376875] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:33:15,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:33:15,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2023-11-29 01:33:15,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217293496] [2023-11-29 01:33:15,631 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:33:15,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 01:33:15,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:15,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 01:33:15,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-29 01:33:15,634 INFO L87 Difference]: Start difference. First operand 3927 states and 6127 transitions. Second operand has 13 states, 13 states have (on average 21.846153846153847) internal successors, (284), 13 states have internal predecessors, (284), 4 states have call successors, (184), 3 states have call predecessors, (184), 5 states have return successors, (184), 4 states have call predecessors, (184), 4 states have call successors, (184) [2023-11-29 01:33:19,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:33:19,776 INFO L93 Difference]: Finished difference Result 11857 states and 18322 transitions. [2023-11-29 01:33:19,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 01:33:19,777 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 21.846153846153847) internal successors, (284), 13 states have internal predecessors, (284), 4 states have call successors, (184), 3 states have call predecessors, (184), 5 states have return successors, (184), 4 states have call predecessors, (184), 4 states have call successors, (184) Word has length 606 [2023-11-29 01:33:19,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:33:19,790 INFO L225 Difference]: With dead ends: 11857 [2023-11-29 01:33:19,790 INFO L226 Difference]: Without dead ends: 8136 [2023-11-29 01:33:19,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1241 GetRequests, 1204 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=385, Invalid=1021, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 01:33:19,795 INFO L413 NwaCegarLoop]: 610 mSDtfsCounter, 4434 mSDsluCounter, 4199 mSDsCounter, 0 mSdLazyCounter, 2427 mSolverCounterSat, 1569 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4499 SdHoareTripleChecker+Valid, 4809 SdHoareTripleChecker+Invalid, 3996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1569 IncrementalHoareTripleChecker+Valid, 2427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-29 01:33:19,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4499 Valid, 4809 Invalid, 3996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1569 Valid, 2427 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-29 01:33:19,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8136 states. [2023-11-29 01:33:20,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8136 to 5477. [2023-11-29 01:33:20,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5477 states, 4769 states have (on average 1.5099601593625498) internal successors, (7201), 4773 states have internal predecessors, (7201), 616 states have call successors, (616), 91 states have call predecessors, (616), 91 states have return successors, (616), 612 states have call predecessors, (616), 616 states have call successors, (616) [2023-11-29 01:33:20,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5477 states to 5477 states and 8433 transitions. [2023-11-29 01:33:20,222 INFO L78 Accepts]: Start accepts. Automaton has 5477 states and 8433 transitions. Word has length 606 [2023-11-29 01:33:20,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:33:20,223 INFO L495 AbstractCegarLoop]: Abstraction has 5477 states and 8433 transitions. [2023-11-29 01:33:20,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 21.846153846153847) internal successors, (284), 13 states have internal predecessors, (284), 4 states have call successors, (184), 3 states have call predecessors, (184), 5 states have return successors, (184), 4 states have call predecessors, (184), 4 states have call successors, (184) [2023-11-29 01:33:20,223 INFO L276 IsEmpty]: Start isEmpty. Operand 5477 states and 8433 transitions. [2023-11-29 01:33:20,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2023-11-29 01:33:20,228 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:33:20,229 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:33:20,236 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-29 01:33:20,429 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 01:33:20,429 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:33:20,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:33:20,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1258188991, now seen corresponding path program 1 times [2023-11-29 01:33:20,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:33:20,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143675926] [2023-11-29 01:33:20,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:20,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:33:20,491 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:33:20,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [168372432] [2023-11-29 01:33:20,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:33:20,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:33:20,492 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:33:20,492 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:33:20,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 01:33:21,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:33:21,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 1435 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 01:33:21,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:33:27,192 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 12775 proven. 873 refuted. 0 times theorem prover too weak. 3096 trivial. 0 not checked. [2023-11-29 01:33:27,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:33:33,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 657 proven. 678 refuted. 0 times theorem prover too weak. 15409 trivial. 0 not checked. [2023-11-29 01:33:33,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:33:33,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143675926] [2023-11-29 01:33:33,989 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:33:33,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168372432] [2023-11-29 01:33:33,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168372432] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:33:33,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:33:33,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 44 [2023-11-29 01:33:33,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281510929] [2023-11-29 01:33:33,990 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:33:33,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 01:33:33,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:33:33,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 01:33:33,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=1359, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 01:33:33,993 INFO L87 Difference]: Start difference. First operand 5477 states and 8433 transitions. Second operand has 44 states, 42 states have (on average 6.714285714285714) internal successors, (282), 40 states have internal predecessors, (282), 13 states have call successors, (184), 8 states have call predecessors, (184), 17 states have return successors, (184), 13 states have call predecessors, (184), 13 states have call successors, (184) [2023-11-29 01:34:33,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:33,566 INFO L93 Difference]: Finished difference Result 19978 states and 30826 transitions. [2023-11-29 01:34:33,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-11-29 01:34:33,567 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 6.714285714285714) internal successors, (282), 40 states have internal predecessors, (282), 13 states have call successors, (184), 8 states have call predecessors, (184), 17 states have return successors, (184), 13 states have call predecessors, (184), 13 states have call successors, (184) Word has length 606 [2023-11-29 01:34:33,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:33,582 INFO L225 Difference]: With dead ends: 19978 [2023-11-29 01:34:33,582 INFO L226 Difference]: Without dead ends: 14732 [2023-11-29 01:34:33,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1301 GetRequests, 1185 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5463 ImplicationChecksByTransitivity, 35.0s TimeCoverageRelationStatistics Valid=4240, Invalid=9566, Unknown=0, NotChecked=0, Total=13806 [2023-11-29 01:34:33,593 INFO L413 NwaCegarLoop]: 428 mSDtfsCounter, 12194 mSDsluCounter, 9870 mSDsCounter, 0 mSdLazyCounter, 7777 mSolverCounterSat, 1811 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12236 SdHoareTripleChecker+Valid, 10298 SdHoareTripleChecker+Invalid, 9588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1811 IncrementalHoareTripleChecker+Valid, 7777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 25.7s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:33,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12236 Valid, 10298 Invalid, 9588 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1811 Valid, 7777 Invalid, 0 Unknown, 0 Unchecked, 25.7s Time] [2023-11-29 01:34:33,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14732 states. [2023-11-29 01:34:34,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14732 to 6344. [2023-11-29 01:34:34,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6344 states, 5566 states have (on average 1.5019762845849802) internal successors, (8360), 5571 states have internal predecessors, (8360), 645 states have call successors, (645), 132 states have call predecessors, (645), 132 states have return successors, (645), 640 states have call predecessors, (645), 645 states have call successors, (645) [2023-11-29 01:34:34,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6344 states to 6344 states and 9650 transitions. [2023-11-29 01:34:34,327 INFO L78 Accepts]: Start accepts. Automaton has 6344 states and 9650 transitions. Word has length 606 [2023-11-29 01:34:34,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:34,328 INFO L495 AbstractCegarLoop]: Abstraction has 6344 states and 9650 transitions. [2023-11-29 01:34:34,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 6.714285714285714) internal successors, (282), 40 states have internal predecessors, (282), 13 states have call successors, (184), 8 states have call predecessors, (184), 17 states have return successors, (184), 13 states have call predecessors, (184), 13 states have call successors, (184) [2023-11-29 01:34:34,328 INFO L276 IsEmpty]: Start isEmpty. Operand 6344 states and 9650 transitions. [2023-11-29 01:34:34,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 607 [2023-11-29 01:34:34,333 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:34,334 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:34:34,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-29 01:34:34,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:34,534 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:34:34,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:34:34,535 INFO L85 PathProgramCache]: Analyzing trace with hash -578916737, now seen corresponding path program 1 times [2023-11-29 01:34:34,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:34:34,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713556786] [2023-11-29 01:34:34,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:34,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:34:34,589 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:34:34,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [74680816] [2023-11-29 01:34:34,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:34:34,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:34:34,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:34:34,590 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:34:34,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 01:34:35,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:34:35,150 INFO L262 TraceCheckSpWp]: Trace formula consists of 1435 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 01:34:35,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:34:41,058 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 11048 proven. 582 refuted. 0 times theorem prover too weak. 5114 trivial. 0 not checked. [2023-11-29 01:34:41,058 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:34:53,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:34:53,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713556786] [2023-11-29 01:34:53,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:34:53,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74680816] [2023-11-29 01:34:53,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74680816] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:34:53,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:34:53,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2023-11-29 01:34:53,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754221162] [2023-11-29 01:34:53,706 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:34:53,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 01:34:53,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:34:53,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 01:34:53,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=903, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 01:34:53,708 INFO L87 Difference]: Start difference. First operand 6344 states and 9650 transitions. Second operand has 25 states, 25 states have (on average 6.92) internal successors, (173), 21 states have internal predecessors, (173), 7 states have call successors, (92), 7 states have call predecessors, (92), 9 states have return successors, (92), 7 states have call predecessors, (92), 7 states have call successors, (92) [2023-11-29 01:34:57,640 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 01:34:59,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:34:59,095 INFO L93 Difference]: Finished difference Result 13777 states and 21019 transitions. [2023-11-29 01:34:59,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 01:34:59,096 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 6.92) internal successors, (173), 21 states have internal predecessors, (173), 7 states have call successors, (92), 7 states have call predecessors, (92), 9 states have return successors, (92), 7 states have call predecessors, (92), 7 states have call successors, (92) Word has length 606 [2023-11-29 01:34:59,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:34:59,106 INFO L225 Difference]: With dead ends: 13777 [2023-11-29 01:34:59,106 INFO L226 Difference]: Without dead ends: 7812 [2023-11-29 01:34:59,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 840 GetRequests, 780 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=797, Invalid=2985, Unknown=0, NotChecked=0, Total=3782 [2023-11-29 01:34:59,113 INFO L413 NwaCegarLoop]: 578 mSDtfsCounter, 1558 mSDsluCounter, 5538 mSDsCounter, 0 mSdLazyCounter, 3140 mSolverCounterSat, 458 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1558 SdHoareTripleChecker+Valid, 6116 SdHoareTripleChecker+Invalid, 3598 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 458 IncrementalHoareTripleChecker+Valid, 3140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:34:59,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1558 Valid, 6116 Invalid, 3598 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [458 Valid, 3140 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-29 01:34:59,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7812 states. [2023-11-29 01:34:59,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7812 to 7347. [2023-11-29 01:34:59,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7347 states, 6549 states have (on average 1.5090853565429836) internal successors, (9883), 6556 states have internal predecessors, (9883), 659 states have call successors, (659), 138 states have call predecessors, (659), 138 states have return successors, (659), 652 states have call predecessors, (659), 659 states have call successors, (659) [2023-11-29 01:34:59,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7347 states to 7347 states and 11201 transitions. [2023-11-29 01:34:59,881 INFO L78 Accepts]: Start accepts. Automaton has 7347 states and 11201 transitions. Word has length 606 [2023-11-29 01:34:59,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:34:59,882 INFO L495 AbstractCegarLoop]: Abstraction has 7347 states and 11201 transitions. [2023-11-29 01:34:59,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 6.92) internal successors, (173), 21 states have internal predecessors, (173), 7 states have call successors, (92), 7 states have call predecessors, (92), 9 states have return successors, (92), 7 states have call predecessors, (92), 7 states have call successors, (92) [2023-11-29 01:34:59,882 INFO L276 IsEmpty]: Start isEmpty. Operand 7347 states and 11201 transitions. [2023-11-29 01:34:59,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2023-11-29 01:34:59,889 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:34:59,890 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:34:59,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 01:35:00,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:00,091 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:35:00,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:35:00,091 INFO L85 PathProgramCache]: Analyzing trace with hash 144969445, now seen corresponding path program 1 times [2023-11-29 01:35:00,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:35:00,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277288787] [2023-11-29 01:35:00,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:00,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:35:00,143 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:35:00,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042332038] [2023-11-29 01:35:00,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:00,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:00,144 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:35:00,144 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:35:00,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 01:35:00,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:35:00,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 1436 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 01:35:00,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:35:03,261 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 10973 proven. 603 refuted. 0 times theorem prover too weak. 5168 trivial. 0 not checked. [2023-11-29 01:35:03,262 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:35:05,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:35:05,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277288787] [2023-11-29 01:35:05,211 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:35:05,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042332038] [2023-11-29 01:35:05,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042332038] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:35:05,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:35:05,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-29 01:35:05,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004626954] [2023-11-29 01:35:05,212 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:35:05,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 01:35:05,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:35:05,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 01:35:05,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2023-11-29 01:35:05,214 INFO L87 Difference]: Start difference. First operand 7347 states and 11201 transitions. Second operand has 15 states, 15 states have (on average 11.6) internal successors, (174), 15 states have internal predecessors, (174), 5 states have call successors, (92), 5 states have call predecessors, (92), 9 states have return successors, (92), 5 states have call predecessors, (92), 5 states have call successors, (92) [2023-11-29 01:35:08,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:35:08,866 INFO L93 Difference]: Finished difference Result 21172 states and 32222 transitions. [2023-11-29 01:35:08,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 01:35:08,867 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 11.6) internal successors, (174), 15 states have internal predecessors, (174), 5 states have call successors, (92), 5 states have call predecessors, (92), 9 states have return successors, (92), 5 states have call predecessors, (92), 5 states have call successors, (92) Word has length 607 [2023-11-29 01:35:08,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:35:08,882 INFO L225 Difference]: With dead ends: 21172 [2023-11-29 01:35:08,883 INFO L226 Difference]: Without dead ends: 14184 [2023-11-29 01:35:08,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1041 GetRequests, 997 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=551, Invalid=1519, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 01:35:08,922 INFO L413 NwaCegarLoop]: 386 mSDtfsCounter, 917 mSDsluCounter, 2099 mSDsCounter, 0 mSdLazyCounter, 1924 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 950 SdHoareTripleChecker+Valid, 2485 SdHoareTripleChecker+Invalid, 2163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 1924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:35:08,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [950 Valid, 2485 Invalid, 2163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 1924 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 01:35:08,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14184 states. [2023-11-29 01:35:09,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14184 to 12821. [2023-11-29 01:35:09,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12821 states, 11929 states have (on average 1.534411937295666) internal successors, (18304), 11938 states have internal predecessors, (18304), 721 states have call successors, (721), 170 states have call predecessors, (721), 170 states have return successors, (721), 712 states have call predecessors, (721), 721 states have call successors, (721) [2023-11-29 01:35:09,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12821 states to 12821 states and 19746 transitions. [2023-11-29 01:35:09,878 INFO L78 Accepts]: Start accepts. Automaton has 12821 states and 19746 transitions. Word has length 607 [2023-11-29 01:35:09,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:35:09,879 INFO L495 AbstractCegarLoop]: Abstraction has 12821 states and 19746 transitions. [2023-11-29 01:35:09,879 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 11.6) internal successors, (174), 15 states have internal predecessors, (174), 5 states have call successors, (92), 5 states have call predecessors, (92), 9 states have return successors, (92), 5 states have call predecessors, (92), 5 states have call successors, (92) [2023-11-29 01:35:09,879 INFO L276 IsEmpty]: Start isEmpty. Operand 12821 states and 19746 transitions. [2023-11-29 01:35:09,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2023-11-29 01:35:09,888 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:35:09,889 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:35:09,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 01:35:10,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:10,089 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:35:10,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:35:10,090 INFO L85 PathProgramCache]: Analyzing trace with hash 824241699, now seen corresponding path program 1 times [2023-11-29 01:35:10,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:35:10,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242928298] [2023-11-29 01:35:10,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:10,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:35:10,152 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:35:10,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [286748455] [2023-11-29 01:35:10,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:10,152 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:10,153 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:35:10,153 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:35:10,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 01:35:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:35:10,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 1436 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 01:35:10,775 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:35:11,444 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 807 proven. 267 refuted. 0 times theorem prover too weak. 15670 trivial. 0 not checked. [2023-11-29 01:35:11,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:35:11,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 6 proven. 267 refuted. 0 times theorem prover too weak. 16471 trivial. 0 not checked. [2023-11-29 01:35:11,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:35:11,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242928298] [2023-11-29 01:35:11,861 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:35:11,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286748455] [2023-11-29 01:35:11,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286748455] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:35:11,862 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:35:11,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-29 01:35:11,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773217869] [2023-11-29 01:35:11,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:35:11,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 01:35:11,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:35:11,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 01:35:11,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-29 01:35:11,865 INFO L87 Difference]: Start difference. First operand 12821 states and 19746 transitions. Second operand has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 2 states have call successors, (181), 2 states have call predecessors, (181), 4 states have return successors, (182), 2 states have call predecessors, (182), 2 states have call successors, (182) [2023-11-29 01:35:13,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:35:13,559 INFO L93 Difference]: Finished difference Result 24817 states and 38139 transitions. [2023-11-29 01:35:13,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 01:35:13,560 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 2 states have call successors, (181), 2 states have call predecessors, (181), 4 states have return successors, (182), 2 states have call predecessors, (182), 2 states have call successors, (182) Word has length 607 [2023-11-29 01:35:13,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:35:13,575 INFO L225 Difference]: With dead ends: 24817 [2023-11-29 01:35:13,575 INFO L226 Difference]: Without dead ends: 13253 [2023-11-29 01:35:13,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1216 GetRequests, 1204 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2023-11-29 01:35:13,583 INFO L413 NwaCegarLoop]: 436 mSDtfsCounter, 263 mSDsluCounter, 1371 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 1807 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 01:35:13,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [263 Valid, 1807 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 01:35:13,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13253 states. [2023-11-29 01:35:14,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13253 to 13045. [2023-11-29 01:35:14,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13045 states, 12140 states have (on average 1.5251235584843492) internal successors, (18515), 12149 states have internal predecessors, (18515), 721 states have call successors, (721), 183 states have call predecessors, (721), 183 states have return successors, (721), 712 states have call predecessors, (721), 721 states have call successors, (721) [2023-11-29 01:35:14,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13045 states to 13045 states and 19957 transitions. [2023-11-29 01:35:14,574 INFO L78 Accepts]: Start accepts. Automaton has 13045 states and 19957 transitions. Word has length 607 [2023-11-29 01:35:14,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:35:14,575 INFO L495 AbstractCegarLoop]: Abstraction has 13045 states and 19957 transitions. [2023-11-29 01:35:14,575 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 17.88888888888889) internal successors, (161), 9 states have internal predecessors, (161), 2 states have call successors, (181), 2 states have call predecessors, (181), 4 states have return successors, (182), 2 states have call predecessors, (182), 2 states have call successors, (182) [2023-11-29 01:35:14,575 INFO L276 IsEmpty]: Start isEmpty. Operand 13045 states and 19957 transitions. [2023-11-29 01:35:14,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2023-11-29 01:35:14,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:35:14,583 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:35:14,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 01:35:14,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 01:35:14,784 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:35:14,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:35:14,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1531563551, now seen corresponding path program 1 times [2023-11-29 01:35:14,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:35:14,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564499733] [2023-11-29 01:35:14,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:14,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:35:14,844 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:35:14,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [485698187] [2023-11-29 01:35:14,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:14,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:14,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:35:14,846 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:35:14,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 01:35:15,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:35:15,592 INFO L262 TraceCheckSpWp]: Trace formula consists of 1436 conjuncts, 42 conjunts are in the unsatisfiable core [2023-11-29 01:35:15,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:35:20,120 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 12548 proven. 897 refuted. 0 times theorem prover too weak. 3299 trivial. 0 not checked. [2023-11-29 01:35:20,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:35:25,681 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 216 proven. 57 refuted. 0 times theorem prover too weak. 16471 trivial. 0 not checked. [2023-11-29 01:35:25,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:35:25,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564499733] [2023-11-29 01:35:25,681 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:35:25,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [485698187] [2023-11-29 01:35:25,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [485698187] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:35:25,682 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:35:25,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 8] total 32 [2023-11-29 01:35:25,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7512752] [2023-11-29 01:35:25,683 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:35:25,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 01:35:25,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:35:25,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 01:35:25,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=274, Invalid=718, Unknown=0, NotChecked=0, Total=992 [2023-11-29 01:35:25,686 INFO L87 Difference]: Start difference. First operand 13045 states and 19957 transitions. Second operand has 32 states, 32 states have (on average 8.5625) internal successors, (274), 30 states have internal predecessors, (274), 9 states have call successors, (179), 8 states have call predecessors, (179), 13 states have return successors, (180), 9 states have call predecessors, (180), 9 states have call successors, (180) [2023-11-29 01:35:40,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:35:40,389 INFO L93 Difference]: Finished difference Result 47385 states and 72302 transitions. [2023-11-29 01:35:40,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2023-11-29 01:35:40,389 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 8.5625) internal successors, (274), 30 states have internal predecessors, (274), 9 states have call successors, (179), 8 states have call predecessors, (179), 13 states have return successors, (180), 9 states have call predecessors, (180), 9 states have call successors, (180) Word has length 607 [2023-11-29 01:35:40,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:35:40,425 INFO L225 Difference]: With dead ends: 47385 [2023-11-29 01:35:40,425 INFO L226 Difference]: Without dead ends: 36273 [2023-11-29 01:35:40,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1308 GetRequests, 1186 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5381 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=3287, Invalid=11965, Unknown=0, NotChecked=0, Total=15252 [2023-11-29 01:35:40,439 INFO L413 NwaCegarLoop]: 746 mSDtfsCounter, 2204 mSDsluCounter, 4122 mSDsCounter, 0 mSdLazyCounter, 4373 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2207 SdHoareTripleChecker+Valid, 4868 SdHoareTripleChecker+Invalid, 5250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 4373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-29 01:35:40,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2207 Valid, 4868 Invalid, 5250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 4373 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-11-29 01:35:40,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36273 states. [2023-11-29 01:35:41,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36273 to 17573. [2023-11-29 01:35:41,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17573 states, 16756 states have (on average 1.5489376939603725) internal successors, (25954), 16762 states have internal predecessors, (25954), 630 states have call successors, (630), 186 states have call predecessors, (630), 186 states have return successors, (630), 624 states have call predecessors, (630), 630 states have call successors, (630) [2023-11-29 01:35:41,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17573 states to 17573 states and 27214 transitions. [2023-11-29 01:35:41,692 INFO L78 Accepts]: Start accepts. Automaton has 17573 states and 27214 transitions. Word has length 607 [2023-11-29 01:35:41,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:35:41,693 INFO L495 AbstractCegarLoop]: Abstraction has 17573 states and 27214 transitions. [2023-11-29 01:35:41,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 8.5625) internal successors, (274), 30 states have internal predecessors, (274), 9 states have call successors, (179), 8 states have call predecessors, (179), 13 states have return successors, (180), 9 states have call predecessors, (180), 9 states have call successors, (180) [2023-11-29 01:35:41,694 INFO L276 IsEmpty]: Start isEmpty. Operand 17573 states and 27214 transitions. [2023-11-29 01:35:41,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 608 [2023-11-29 01:35:41,703 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:35:41,703 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:35:41,714 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 01:35:41,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 01:35:41,904 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:35:41,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:35:41,904 INFO L85 PathProgramCache]: Analyzing trace with hash -2092263329, now seen corresponding path program 1 times [2023-11-29 01:35:41,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:35:41,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542383925] [2023-11-29 01:35:41,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:41,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:35:41,962 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:35:41,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1623930087] [2023-11-29 01:35:41,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:35:41,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:35:41,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:35:41,963 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:35:41,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 01:35:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:35:42,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 1436 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 01:35:42,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:35:48,292 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 11801 proven. 483 refuted. 0 times theorem prover too weak. 4460 trivial. 0 not checked. [2023-11-29 01:35:48,292 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:36:20,294 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 573 proven. 501 refuted. 0 times theorem prover too weak. 15670 trivial. 0 not checked. [2023-11-29 01:36:20,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:36:20,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542383925] [2023-11-29 01:36:20,294 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:36:20,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623930087] [2023-11-29 01:36:20,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623930087] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:36:20,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:36:20,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 37 [2023-11-29 01:36:20,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817137279] [2023-11-29 01:36:20,295 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:36:20,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 01:36:20,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:36:20,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 01:36:20,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1031, Unknown=1, NotChecked=0, Total=1332 [2023-11-29 01:36:20,298 INFO L87 Difference]: Start difference. First operand 17573 states and 27214 transitions. Second operand has 37 states, 35 states have (on average 8.142857142857142) internal successors, (285), 35 states have internal predecessors, (285), 12 states have call successors, (184), 7 states have call predecessors, (184), 13 states have return successors, (184), 10 states have call predecessors, (184), 12 states have call successors, (184) [2023-11-29 01:37:00,480 WARN L293 SmtUtils]: Spent 5.15s on a formula simplification. DAG size of input: 69 DAG size of output: 67 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:37:03,603 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 01:37:08,930 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 01:37:14,729 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 01:37:19,535 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 01:37:22,042 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 01:37:25,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.11s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 01:37:33,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 01:37:35,165 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 01:37:48,061 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 01:38:00,405 WARN L293 SmtUtils]: Spent 6.10s on a formula simplification. DAG size of input: 67 DAG size of output: 56 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:38:02,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 01:38:12,591 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 01:38:16,000 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 01:38:21,259 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 01:38:24,298 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 01:38:27,125 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 01:38:37,765 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2023-11-29 01:39:00,456 WARN L293 SmtUtils]: Spent 5.80s on a formula simplification. DAG size of input: 64 DAG size of output: 60 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:39:07,059 WARN L293 SmtUtils]: Spent 6.52s on a formula simplification. DAG size of input: 72 DAG size of output: 68 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:39:19,324 WARN L293 SmtUtils]: Spent 5.51s on a formula simplification. DAG size of input: 63 DAG size of output: 61 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:39:21,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:39:21,720 INFO L93 Difference]: Finished difference Result 78197 states and 121083 transitions. [2023-11-29 01:39:21,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2023-11-29 01:39:21,721 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 35 states have (on average 8.142857142857142) internal successors, (285), 35 states have internal predecessors, (285), 12 states have call successors, (184), 7 states have call predecessors, (184), 13 states have return successors, (184), 10 states have call predecessors, (184), 12 states have call successors, (184) Word has length 607 [2023-11-29 01:39:21,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:39:21,786 INFO L225 Difference]: With dead ends: 78197 [2023-11-29 01:39:21,787 INFO L226 Difference]: Without dead ends: 63613 [2023-11-29 01:39:21,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1311 GetRequests, 1192 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5359 ImplicationChecksByTransitivity, 118.5s TimeCoverageRelationStatistics Valid=3332, Invalid=11187, Unknown=1, NotChecked=0, Total=14520 [2023-11-29 01:39:21,811 INFO L413 NwaCegarLoop]: 1130 mSDtfsCounter, 9084 mSDsluCounter, 7552 mSDsCounter, 0 mSdLazyCounter, 6160 mSolverCounterSat, 2365 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 74.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9118 SdHoareTripleChecker+Valid, 8682 SdHoareTripleChecker+Invalid, 8530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 2365 IncrementalHoareTripleChecker+Valid, 6160 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 75.8s IncrementalHoareTripleChecker+Time [2023-11-29 01:39:21,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9118 Valid, 8682 Invalid, 8530 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [2365 Valid, 6160 Invalid, 5 Unknown, 0 Unchecked, 75.8s Time] [2023-11-29 01:39:21,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63613 states. [2023-11-29 01:39:23,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63613 to 30507. [2023-11-29 01:39:23,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30507 states, 29624 states have (on average 1.5442209019713746) internal successors, (45746), 29635 states have internal predecessors, (45746), 665 states have call successors, (665), 217 states have call predecessors, (665), 217 states have return successors, (665), 654 states have call predecessors, (665), 665 states have call successors, (665) [2023-11-29 01:39:23,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30507 states to 30507 states and 47076 transitions. [2023-11-29 01:39:23,724 INFO L78 Accepts]: Start accepts. Automaton has 30507 states and 47076 transitions. Word has length 607 [2023-11-29 01:39:23,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:39:23,725 INFO L495 AbstractCegarLoop]: Abstraction has 30507 states and 47076 transitions. [2023-11-29 01:39:23,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 35 states have (on average 8.142857142857142) internal successors, (285), 35 states have internal predecessors, (285), 12 states have call successors, (184), 7 states have call predecessors, (184), 13 states have return successors, (184), 10 states have call predecessors, (184), 12 states have call successors, (184) [2023-11-29 01:39:23,725 INFO L276 IsEmpty]: Start isEmpty. Operand 30507 states and 47076 transitions. [2023-11-29 01:39:23,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-29 01:39:23,735 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:39:23,735 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:39:23,744 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 01:39:23,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 01:39:23,936 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:39:23,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:39:23,936 INFO L85 PathProgramCache]: Analyzing trace with hash 1570597068, now seen corresponding path program 1 times [2023-11-29 01:39:23,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:39:23,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081628540] [2023-11-29 01:39:23,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:39:23,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:39:23,989 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:39:23,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [548614858] [2023-11-29 01:39:23,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:39:23,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:39:23,990 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:39:23,991 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:39:23,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 01:39:25,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:39:25,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 1440 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 01:39:25,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:39:26,835 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 8192 proven. 333 refuted. 0 times theorem prover too weak. 8219 trivial. 0 not checked. [2023-11-29 01:39:26,835 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:39:27,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 207 proven. 336 refuted. 0 times theorem prover too weak. 16201 trivial. 0 not checked. [2023-11-29 01:39:27,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:39:27,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081628540] [2023-11-29 01:39:27,705 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:39:27,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548614858] [2023-11-29 01:39:27,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548614858] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:39:27,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:39:27,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-29 01:39:27,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746549302] [2023-11-29 01:39:27,706 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:39:27,707 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 01:39:27,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:39:27,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 01:39:27,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:39:27,709 INFO L87 Difference]: Start difference. First operand 30507 states and 47076 transitions. Second operand has 16 states, 16 states have (on average 16.125) internal successors, (258), 16 states have internal predecessors, (258), 5 states have call successors, (149), 3 states have call predecessors, (149), 7 states have return successors, (150), 5 states have call predecessors, (150), 5 states have call successors, (150) [2023-11-29 01:39:32,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:39:32,589 INFO L93 Difference]: Finished difference Result 82583 states and 125677 transitions. [2023-11-29 01:39:32,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 01:39:32,590 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 16.125) internal successors, (258), 16 states have internal predecessors, (258), 5 states have call successors, (149), 3 states have call predecessors, (149), 7 states have return successors, (150), 5 states have call predecessors, (150), 5 states have call successors, (150) Word has length 608 [2023-11-29 01:39:32,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:39:32,660 INFO L225 Difference]: With dead ends: 82583 [2023-11-29 01:39:32,660 INFO L226 Difference]: Without dead ends: 56605 [2023-11-29 01:39:32,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1230 GetRequests, 1202 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2023-11-29 01:39:32,673 INFO L413 NwaCegarLoop]: 410 mSDtfsCounter, 1477 mSDsluCounter, 1112 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1512 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 01:39:32,673 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1512 Valid, 1522 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 01:39:32,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56605 states. [2023-11-29 01:39:34,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56605 to 32623. [2023-11-29 01:39:34,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32623 states, 31740 states have (on average 1.5240705734089477) internal successors, (48374), 31751 states have internal predecessors, (48374), 665 states have call successors, (665), 217 states have call predecessors, (665), 217 states have return successors, (665), 654 states have call predecessors, (665), 665 states have call successors, (665) [2023-11-29 01:39:34,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32623 states to 32623 states and 49704 transitions. [2023-11-29 01:39:34,576 INFO L78 Accepts]: Start accepts. Automaton has 32623 states and 49704 transitions. Word has length 608 [2023-11-29 01:39:34,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:39:34,576 INFO L495 AbstractCegarLoop]: Abstraction has 32623 states and 49704 transitions. [2023-11-29 01:39:34,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.125) internal successors, (258), 16 states have internal predecessors, (258), 5 states have call successors, (149), 3 states have call predecessors, (149), 7 states have return successors, (150), 5 states have call predecessors, (150), 5 states have call successors, (150) [2023-11-29 01:39:34,577 INFO L276 IsEmpty]: Start isEmpty. Operand 32623 states and 49704 transitions. [2023-11-29 01:39:34,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-29 01:39:34,586 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:39:34,586 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:39:34,595 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 01:39:34,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 01:39:34,787 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:39:34,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:39:34,787 INFO L85 PathProgramCache]: Analyzing trace with hash -2064838706, now seen corresponding path program 1 times [2023-11-29 01:39:34,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:39:34,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673962039] [2023-11-29 01:39:34,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:39:34,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:39:34,838 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:39:34,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120350014] [2023-11-29 01:39:34,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:39:34,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:39:34,838 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:39:34,839 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:39:34,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 01:39:35,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:39:35,876 INFO L262 TraceCheckSpWp]: Trace formula consists of 1440 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 01:39:35,884 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:39:40,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 8147 proven. 729 refuted. 0 times theorem prover too weak. 7868 trivial. 0 not checked. [2023-11-29 01:39:40,815 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:39:44,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:39:44,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673962039] [2023-11-29 01:39:44,845 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:39:44,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120350014] [2023-11-29 01:39:44,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120350014] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:39:44,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:39:44,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-11-29 01:39:44,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447577280] [2023-11-29 01:39:44,846 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:39:44,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 01:39:44,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:39:44,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 01:39:44,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2023-11-29 01:39:44,847 INFO L87 Difference]: Start difference. First operand 32623 states and 49704 transitions. Second operand has 18 states, 18 states have (on average 9.38888888888889) internal successors, (169), 17 states have internal predecessors, (169), 4 states have call successors, (92), 4 states have call predecessors, (92), 7 states have return successors, (92), 4 states have call predecessors, (92), 4 states have call successors, (92) [2023-11-29 01:40:04,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:40:04,020 INFO L93 Difference]: Finished difference Result 103090 states and 156766 transitions. [2023-11-29 01:40:04,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-29 01:40:04,021 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 9.38888888888889) internal successors, (169), 17 states have internal predecessors, (169), 4 states have call successors, (92), 4 states have call predecessors, (92), 7 states have return successors, (92), 4 states have call predecessors, (92), 4 states have call successors, (92) Word has length 608 [2023-11-29 01:40:04,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:40:04,092 INFO L225 Difference]: With dead ends: 103090 [2023-11-29 01:40:04,092 INFO L226 Difference]: Without dead ends: 74429 [2023-11-29 01:40:04,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 742 GetRequests, 679 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=835, Invalid=3325, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 01:40:04,106 INFO L413 NwaCegarLoop]: 838 mSDtfsCounter, 4240 mSDsluCounter, 7300 mSDsCounter, 0 mSdLazyCounter, 3336 mSolverCounterSat, 1075 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4240 SdHoareTripleChecker+Valid, 8138 SdHoareTripleChecker+Invalid, 4411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1075 IncrementalHoareTripleChecker+Valid, 3336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2023-11-29 01:40:04,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4240 Valid, 8138 Invalid, 4411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1075 Valid, 3336 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2023-11-29 01:40:04,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74429 states. [2023-11-29 01:40:07,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74429 to 47187. [2023-11-29 01:40:07,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47187 states, 45441 states have (on average 1.5104421117493012) internal successors, (68636), 45470 states have internal predecessors, (68636), 1315 states have call successors, (1315), 430 states have call predecessors, (1315), 430 states have return successors, (1315), 1286 states have call predecessors, (1315), 1315 states have call successors, (1315) [2023-11-29 01:40:08,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47187 states to 47187 states and 71266 transitions. [2023-11-29 01:40:08,040 INFO L78 Accepts]: Start accepts. Automaton has 47187 states and 71266 transitions. Word has length 608 [2023-11-29 01:40:08,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:40:08,041 INFO L495 AbstractCegarLoop]: Abstraction has 47187 states and 71266 transitions. [2023-11-29 01:40:08,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 9.38888888888889) internal successors, (169), 17 states have internal predecessors, (169), 4 states have call successors, (92), 4 states have call predecessors, (92), 7 states have return successors, (92), 4 states have call predecessors, (92), 4 states have call successors, (92) [2023-11-29 01:40:08,041 INFO L276 IsEmpty]: Start isEmpty. Operand 47187 states and 71266 transitions. [2023-11-29 01:40:08,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-29 01:40:08,050 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:40:08,050 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:40:08,059 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 01:40:08,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:40:08,251 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:40:08,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:40:08,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1997236916, now seen corresponding path program 1 times [2023-11-29 01:40:08,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:40:08,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091944810] [2023-11-29 01:40:08,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:40:08,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:40:08,304 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:40:08,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1097954110] [2023-11-29 01:40:08,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:40:08,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:40:08,305 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:40:08,306 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:40:08,306 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 01:40:09,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:40:09,945 INFO L262 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-29 01:40:09,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:40:15,322 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 11911 proven. 549 refuted. 0 times theorem prover too weak. 4284 trivial. 0 not checked. [2023-11-29 01:40:15,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:40:28,361 WARN L293 SmtUtils]: Spent 5.38s on a formula simplification. DAG size of input: 55 DAG size of output: 52 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:44:18,690 WARN L293 SmtUtils]: Spent 11.79s on a formula simplification that was a NOOP. DAG size: 54 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:44:26,949 WARN L293 SmtUtils]: Spent 5.30s on a formula simplification that was a NOOP. DAG size: 39 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:44:49,501 WARN L293 SmtUtils]: Spent 8.91s on a formula simplification that was a NOOP. DAG size: 41 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:45:28,456 WARN L293 SmtUtils]: Spent 14.29s on a formula simplification. DAG size of input: 50 DAG size of output: 36 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 01:45:28,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:45:28,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091944810] [2023-11-29 01:45:28,457 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:45:28,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097954110] [2023-11-29 01:45:28,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097954110] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 01:45:28,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 01:45:28,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-11-29 01:45:28,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153514357] [2023-11-29 01:45:28,458 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 01:45:28,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 01:45:28,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:45:28,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 01:45:28,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=749, Unknown=6, NotChecked=0, Total=930 [2023-11-29 01:45:28,460 INFO L87 Difference]: Start difference. First operand 47187 states and 71266 transitions. Second operand has 20 states, 20 states have (on average 8.6) internal successors, (172), 18 states have internal predecessors, (172), 5 states have call successors, (92), 5 states have call predecessors, (92), 8 states have return successors, (92), 5 states have call predecessors, (92), 5 states have call successors, (92) [2023-11-29 01:45:45,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:45:45,256 INFO L93 Difference]: Finished difference Result 121848 states and 182364 transitions. [2023-11-29 01:45:45,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-29 01:45:45,257 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 8.6) internal successors, (172), 18 states have internal predecessors, (172), 5 states have call successors, (92), 5 states have call predecessors, (92), 8 states have return successors, (92), 5 states have call predecessors, (92), 5 states have call successors, (92) Word has length 608 [2023-11-29 01:45:45,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:45:45,331 INFO L225 Difference]: With dead ends: 121848 [2023-11-29 01:45:45,331 INFO L226 Difference]: Without dead ends: 79004 [2023-11-29 01:45:45,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 877 GetRequests, 798 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1610 ImplicationChecksByTransitivity, 79.7s TimeCoverageRelationStatistics Valid=1463, Invalid=5011, Unknown=6, NotChecked=0, Total=6480 [2023-11-29 01:45:45,358 INFO L413 NwaCegarLoop]: 1088 mSDtfsCounter, 2365 mSDsluCounter, 9265 mSDsCounter, 0 mSdLazyCounter, 6219 mSolverCounterSat, 794 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2365 SdHoareTripleChecker+Valid, 10353 SdHoareTripleChecker+Invalid, 7013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 794 IncrementalHoareTripleChecker+Valid, 6219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-11-29 01:45:45,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2365 Valid, 10353 Invalid, 7013 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [794 Valid, 6219 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2023-11-29 01:45:45,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79004 states. [2023-11-29 01:45:50,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79004 to 58360. [2023-11-29 01:45:50,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58360 states, 56064 states have (on average 1.4970926084474885) internal successors, (83933), 56099 states have internal predecessors, (83933), 1733 states have call successors, (1733), 562 states have call predecessors, (1733), 562 states have return successors, (1733), 1698 states have call predecessors, (1733), 1733 states have call successors, (1733) [2023-11-29 01:45:50,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58360 states to 58360 states and 87399 transitions. [2023-11-29 01:45:50,326 INFO L78 Accepts]: Start accepts. Automaton has 58360 states and 87399 transitions. Word has length 608 [2023-11-29 01:45:50,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:45:50,327 INFO L495 AbstractCegarLoop]: Abstraction has 58360 states and 87399 transitions. [2023-11-29 01:45:50,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 8.6) internal successors, (172), 18 states have internal predecessors, (172), 5 states have call successors, (92), 5 states have call predecessors, (92), 8 states have return successors, (92), 5 states have call predecessors, (92), 5 states have call successors, (92) [2023-11-29 01:45:50,327 INFO L276 IsEmpty]: Start isEmpty. Operand 58360 states and 87399 transitions. [2023-11-29 01:45:50,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 609 [2023-11-29 01:45:50,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:45:50,341 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:45:50,354 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 01:45:50,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:45:50,542 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:45:50,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:45:50,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1526996814, now seen corresponding path program 1 times [2023-11-29 01:45:50,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:45:50,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676758111] [2023-11-29 01:45:50,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:50,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:45:50,591 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:45:50,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [605835719] [2023-11-29 01:45:50,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:45:50,591 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:45:50,591 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:45:50,592 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:45:50,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 01:45:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:45:51,210 INFO L262 TraceCheckSpWp]: Trace formula consists of 1442 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 01:45:51,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:45:53,809 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 631 proven. 3 refuted. 0 times theorem prover too weak. 16110 trivial. 0 not checked. [2023-11-29 01:45:53,809 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 01:45:55,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 270 proven. 3 refuted. 0 times theorem prover too weak. 16471 trivial. 0 not checked. [2023-11-29 01:45:55,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 01:45:55,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676758111] [2023-11-29 01:45:55,039 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 01:45:55,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605835719] [2023-11-29 01:45:55,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605835719] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 01:45:55,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 01:45:55,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-29 01:45:55,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296012674] [2023-11-29 01:45:55,040 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 01:45:55,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 01:45:55,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 01:45:55,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 01:45:55,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2023-11-29 01:45:55,042 INFO L87 Difference]: Start difference. First operand 58360 states and 87399 transitions. Second operand has 16 states, 16 states have (on average 13.9375) internal successors, (223), 15 states have internal predecessors, (223), 4 states have call successors, (184), 3 states have call predecessors, (184), 5 states have return successors, (184), 4 states have call predecessors, (184), 4 states have call successors, (184) [2023-11-29 01:46:05,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 01:46:05,161 INFO L93 Difference]: Finished difference Result 118607 states and 177555 transitions. [2023-11-29 01:46:05,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 01:46:05,162 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 13.9375) internal successors, (223), 15 states have internal predecessors, (223), 4 states have call successors, (184), 3 states have call predecessors, (184), 5 states have return successors, (184), 4 states have call predecessors, (184), 4 states have call successors, (184) Word has length 608 [2023-11-29 01:46:05,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 01:46:05,222 INFO L225 Difference]: With dead ends: 118607 [2023-11-29 01:46:05,222 INFO L226 Difference]: Without dead ends: 60526 [2023-11-29 01:46:05,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1226 GetRequests, 1202 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=475, Unknown=0, NotChecked=0, Total=650 [2023-11-29 01:46:05,242 INFO L413 NwaCegarLoop]: 421 mSDtfsCounter, 1249 mSDsluCounter, 3511 mSDsCounter, 0 mSdLazyCounter, 2393 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1340 SdHoareTripleChecker+Valid, 3932 SdHoareTripleChecker+Invalid, 3000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 2393 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-29 01:46:05,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1340 Valid, 3932 Invalid, 3000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 2393 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-29 01:46:05,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60526 states. [2023-11-29 01:46:10,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60526 to 58372. [2023-11-29 01:46:10,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58372 states, 56075 states have (on average 1.4968345965225145) internal successors, (83935), 56110 states have internal predecessors, (83935), 1733 states have call successors, (1733), 563 states have call predecessors, (1733), 563 states have return successors, (1733), 1698 states have call predecessors, (1733), 1733 states have call successors, (1733) [2023-11-29 01:46:11,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58372 states to 58372 states and 87401 transitions. [2023-11-29 01:46:11,020 INFO L78 Accepts]: Start accepts. Automaton has 58372 states and 87401 transitions. Word has length 608 [2023-11-29 01:46:11,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 01:46:11,021 INFO L495 AbstractCegarLoop]: Abstraction has 58372 states and 87401 transitions. [2023-11-29 01:46:11,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 13.9375) internal successors, (223), 15 states have internal predecessors, (223), 4 states have call successors, (184), 3 states have call predecessors, (184), 5 states have return successors, (184), 4 states have call predecessors, (184), 4 states have call successors, (184) [2023-11-29 01:46:11,021 INFO L276 IsEmpty]: Start isEmpty. Operand 58372 states and 87401 transitions. [2023-11-29 01:46:11,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 610 [2023-11-29 01:46:11,035 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 01:46:11,035 INFO L195 NwaCegarLoop]: trace histogram [92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:46:11,045 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 01:46:11,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:11,236 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 01:46:11,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 01:46:11,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1557154765, now seen corresponding path program 1 times [2023-11-29 01:46:11,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 01:46:11,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750504835] [2023-11-29 01:46:11,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:11,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 01:46:11,286 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 01:46:11,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1281073891] [2023-11-29 01:46:11,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 01:46:11,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 01:46:11,287 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 01:46:11,288 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 01:46:11,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_3ae4749b-856f-4b14-836e-f02737bc8a98/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 01:46:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 01:46:11,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 1448 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 01:46:11,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:46:13,240 INFO L134 CoverageAnalysis]: Checked inductivity of 16744 backedges. 8391 proven. 123 refuted. 0 times theorem prover too weak. 8230 trivial. 0 not checked. [2023-11-29 01:46:13,240 INFO L327 TraceCheckSpWp]: Computing backward predicates...