./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-24.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/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_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-24.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/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_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/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 107d0e452e5595f1deab9eb0bc24a94452bda82a0a15c0d1f255f44e041f3176 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:49:22,414 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:49:22,504 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:49:22,512 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:49:22,512 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:49:22,546 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:49:22,547 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:49:22,548 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:49:22,549 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:49:22,550 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:49:22,550 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:49:22,551 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:49:22,552 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:49:22,553 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:49:22,554 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:49:22,554 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:49:22,555 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:49:22,556 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:49:22,556 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:49:22,557 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:49:22,557 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:49:22,563 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:49:22,564 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:49:22,565 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:49:22,565 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:49:22,566 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:49:22,566 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:49:22,567 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:49:22,567 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:49:22,584 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:49:22,587 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:49:22,587 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:49:22,588 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:49:22,588 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:49:22,589 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:49:22,589 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:49:22,589 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:49:22,590 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:49:22,590 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:49:22,590 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:49:22,590 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:49:22,591 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:49:22,591 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_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 107d0e452e5595f1deab9eb0bc24a94452bda82a0a15c0d1f255f44e041f3176 [2023-11-29 05:49:22,936 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:49:22,965 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:49:22,969 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:49:22,971 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:49:22,971 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:49:22,973 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-24.i [2023-11-29 05:49:26,409 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:49:26,796 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:49:26,797 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-24.i [2023-11-29 05:49:26,853 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/data/5ae02100e/c524724f4cad40af858c10df7945c040/FLAGf53473a8b [2023-11-29 05:49:26,874 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/data/5ae02100e/c524724f4cad40af858c10df7945c040 [2023-11-29 05:49:26,878 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:49:26,880 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:49:26,882 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:49:26,882 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:49:26,890 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:49:26,891 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:49:26" (1/1) ... [2023-11-29 05:49:26,893 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a0c1b1b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:26, skipping insertion in model container [2023-11-29 05:49:26,893 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:49:26" (1/1) ... [2023-11-29 05:49:26,991 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:49:27,204 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_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-24.i[916,929] [2023-11-29 05:49:27,506 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:49:27,530 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:49:27,548 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_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-24.i[916,929] [2023-11-29 05:49:27,696 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:49:27,722 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:49:27,723 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:27 WrapperNode [2023-11-29 05:49:27,723 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:49:27,725 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:49:27,725 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:49:27,725 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:49:27,734 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:27" (1/1) ... [2023-11-29 05:49:27,771 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:27" (1/1) ... [2023-11-29 05:49:27,920 INFO L138 Inliner]: procedures = 26, calls = 93, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 885 [2023-11-29 05:49:27,921 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:49:27,922 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:49:27,922 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:49:27,922 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:49:27,940 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:27" (1/1) ... [2023-11-29 05:49:27,940 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:27" (1/1) ... [2023-11-29 05:49:28,010 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:27" (1/1) ... [2023-11-29 05:49:28,115 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 05:49:28,116 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:27" (1/1) ... [2023-11-29 05:49:28,116 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:27" (1/1) ... [2023-11-29 05:49:28,167 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:27" (1/1) ... [2023-11-29 05:49:28,178 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:27" (1/1) ... [2023-11-29 05:49:28,192 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:27" (1/1) ... [2023-11-29 05:49:28,203 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:27" (1/1) ... [2023-11-29 05:49:28,221 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:49:28,222 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:49:28,222 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:49:28,223 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:49:28,224 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:27" (1/1) ... [2023-11-29 05:49:28,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:49:28,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:49:28,265 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:49:28,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:49:28,314 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:49:28,314 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 05:49:28,314 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 05:49:28,315 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:49:28,315 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:49:28,315 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:49:28,539 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:49:28,542 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:49:30,362 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:49:30,460 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:49:30,460 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 05:49:30,461 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:49:30 BoogieIcfgContainer [2023-11-29 05:49:30,461 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:49:30,465 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:49:30,466 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:49:30,470 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:49:30,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:49:26" (1/3) ... [2023-11-29 05:49:30,472 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a3fe346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:49:30, skipping insertion in model container [2023-11-29 05:49:30,472 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:49:27" (2/3) ... [2023-11-29 05:49:30,472 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4a3fe346 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:49:30, skipping insertion in model container [2023-11-29 05:49:30,473 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:49:30" (3/3) ... [2023-11-29 05:49:30,475 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-24.i [2023-11-29 05:49:30,501 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:49:30,501 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:49:30,576 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:49:30,584 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;@7a65d78c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:49:30,584 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 05:49:30,591 INFO L276 IsEmpty]: Start isEmpty. Operand has 340 states, 257 states have (on average 1.595330739299611) internal successors, (410), 258 states have internal predecessors, (410), 80 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-29 05:49:30,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2023-11-29 05:49:30,629 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:49:30,631 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:30,632 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:49:30,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:30,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1071845789, now seen corresponding path program 1 times [2023-11-29 05:49:30,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:49:30,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187373727] [2023-11-29 05:49:30,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:30,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:49:30,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:31,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:49:31,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187373727] [2023-11-29 05:49:31,076 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 05:49:31,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726680282] [2023-11-29 05:49:31,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:31,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:31,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:49:31,084 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:49:31,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:49:31,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:31,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 05:49:31,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:31,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 158 proven. 0 refuted. 0 times theorem prover too weak. 12482 trivial. 0 not checked. [2023-11-29 05:49:31,676 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:49:31,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1726680282] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:49:31,677 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:49:31,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:49:31,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743988004] [2023-11-29 05:49:31,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:49:31,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 05:49:31,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:49:31,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 05:49:31,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 05:49:31,721 INFO L87 Difference]: Start difference. First operand has 340 states, 257 states have (on average 1.595330739299611) internal successors, (410), 258 states have internal predecessors, (410), 80 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) Second operand has 2 states, 2 states have (on average 73.0) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (80), 2 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 2 states have call successors, (80) [2023-11-29 05:49:31,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:49:31,803 INFO L93 Difference]: Finished difference Result 677 states and 1218 transitions. [2023-11-29 05:49:31,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 05:49:31,806 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 73.0) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (80), 2 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 2 states have call successors, (80) Word has length 541 [2023-11-29 05:49:31,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:49:31,818 INFO L225 Difference]: With dead ends: 677 [2023-11-29 05:49:31,818 INFO L226 Difference]: Without dead ends: 338 [2023-11-29 05:49:31,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 05:49:31,829 INFO L413 NwaCegarLoop]: 562 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:49:31,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 562 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:49:31,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 338 states. [2023-11-29 05:49:31,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 338 to 338. [2023-11-29 05:49:31,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 256 states have (on average 1.58203125) internal successors, (405), 256 states have internal predecessors, (405), 80 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-29 05:49:31,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 565 transitions. [2023-11-29 05:49:31,909 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 565 transitions. Word has length 541 [2023-11-29 05:49:31,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:49:31,910 INFO L495 AbstractCegarLoop]: Abstraction has 338 states and 565 transitions. [2023-11-29 05:49:31,911 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.0) internal successors, (146), 2 states have internal predecessors, (146), 2 states have call successors, (80), 2 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 2 states have call successors, (80) [2023-11-29 05:49:31,911 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 565 transitions. [2023-11-29 05:49:31,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2023-11-29 05:49:31,927 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:49:31,928 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:31,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:49:32,135 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 05:49:32,136 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:49:32,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:32,137 INFO L85 PathProgramCache]: Analyzing trace with hash -1726275989, now seen corresponding path program 1 times [2023-11-29 05:49:32,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:49:32,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941726273] [2023-11-29 05:49:32,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:32,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:49:32,268 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:49:32,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1583463453] [2023-11-29 05:49:32,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:32,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:32,269 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:49:32,271 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:49:32,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:49:32,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:32,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:49:32,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-29 05:49:32,865 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:49:32,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:49:32,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941726273] [2023-11-29 05:49:32,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:49:32,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583463453] [2023-11-29 05:49:32,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583463453] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:49:32,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:49:32,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:49:32,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341176443] [2023-11-29 05:49:32,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:49:32,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:49:32,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:49:32,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:49:32,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:49:32,872 INFO L87 Difference]: Start difference. First operand 338 states and 565 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 05:49:33,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:49:33,037 INFO L93 Difference]: Finished difference Result 1000 states and 1672 transitions. [2023-11-29 05:49:33,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:49:33,038 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 541 [2023-11-29 05:49:33,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:49:33,047 INFO L225 Difference]: With dead ends: 1000 [2023-11-29 05:49:33,047 INFO L226 Difference]: Without dead ends: 663 [2023-11-29 05:49:33,049 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:49:33,050 INFO L413 NwaCegarLoop]: 553 mSDtfsCounter, 530 mSDsluCounter, 543 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 1096 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:49:33,051 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [530 Valid, 1096 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:49:33,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2023-11-29 05:49:33,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 506. [2023-11-29 05:49:33,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 424 states have (on average 1.6367924528301887) internal successors, (694), 424 states have internal predecessors, (694), 80 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 80 states have call predecessors, (80), 80 states have call successors, (80) [2023-11-29 05:49:33,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 854 transitions. [2023-11-29 05:49:33,111 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 854 transitions. Word has length 541 [2023-11-29 05:49:33,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:49:33,115 INFO L495 AbstractCegarLoop]: Abstraction has 506 states and 854 transitions. [2023-11-29 05:49:33,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 05:49:33,115 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 854 transitions. [2023-11-29 05:49:33,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2023-11-29 05:49:33,122 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:49:33,122 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:33,132 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:49:33,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:33,323 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:49:33,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:33,324 INFO L85 PathProgramCache]: Analyzing trace with hash -668437911, now seen corresponding path program 1 times [2023-11-29 05:49:33,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:49:33,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045655313] [2023-11-29 05:49:33,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:33,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:49:33,429 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:49:33,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1711143416] [2023-11-29 05:49:33,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:33,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:33,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:49:33,432 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:49:33,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:49:33,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:33,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 1306 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:49:33,892 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:33,971 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-29 05:49:33,971 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:49:33,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:49:33,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045655313] [2023-11-29 05:49:33,972 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:49:33,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711143416] [2023-11-29 05:49:33,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711143416] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:49:33,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:49:33,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:49:33,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723198540] [2023-11-29 05:49:33,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:49:33,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:49:33,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:49:33,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:49:33,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:49:33,976 INFO L87 Difference]: Start difference. First operand 506 states and 854 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 05:49:34,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:49:34,095 INFO L93 Difference]: Finished difference Result 1503 states and 2534 transitions. [2023-11-29 05:49:34,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:49:34,096 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 541 [2023-11-29 05:49:34,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:49:34,105 INFO L225 Difference]: With dead ends: 1503 [2023-11-29 05:49:34,106 INFO L226 Difference]: Without dead ends: 998 [2023-11-29 05:49:34,107 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:49:34,109 INFO L413 NwaCegarLoop]: 1045 mSDtfsCounter, 528 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 528 SdHoareTripleChecker+Valid, 1582 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:49:34,109 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [528 Valid, 1582 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:49:34,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2023-11-29 05:49:34,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 996. [2023-11-29 05:49:34,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 996 states, 833 states have (on average 1.6194477791116446) internal successors, (1349), 833 states have internal predecessors, (1349), 160 states have call successors, (160), 2 states have call predecessors, (160), 2 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2023-11-29 05:49:34,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 996 states to 996 states and 1669 transitions. [2023-11-29 05:49:34,206 INFO L78 Accepts]: Start accepts. Automaton has 996 states and 1669 transitions. Word has length 541 [2023-11-29 05:49:34,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:49:34,208 INFO L495 AbstractCegarLoop]: Abstraction has 996 states and 1669 transitions. [2023-11-29 05:49:34,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 05:49:34,209 INFO L276 IsEmpty]: Start isEmpty. Operand 996 states and 1669 transitions. [2023-11-29 05:49:34,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2023-11-29 05:49:34,215 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:49:34,216 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:34,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 05:49:34,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:34,417 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:49:34,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:34,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1667954599, now seen corresponding path program 1 times [2023-11-29 05:49:34,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:49:34,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550260681] [2023-11-29 05:49:34,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:34,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:49:34,549 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:49:34,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1200801377] [2023-11-29 05:49:34,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:34,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:34,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:49:34,551 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:49:34,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:49:34,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:34,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 1305 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:49:35,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-29 05:49:35,080 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:49:35,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:49:35,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550260681] [2023-11-29 05:49:35,081 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:49:35,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200801377] [2023-11-29 05:49:35,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200801377] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:49:35,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:49:35,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:49:35,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284754381] [2023-11-29 05:49:35,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:49:35,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:49:35,084 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:49:35,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:49:35,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:49:35,085 INFO L87 Difference]: Start difference. First operand 996 states and 1669 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 05:49:35,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:49:35,256 INFO L93 Difference]: Finished difference Result 2667 states and 4448 transitions. [2023-11-29 05:49:35,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:49:35,257 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 541 [2023-11-29 05:49:35,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:49:35,269 INFO L225 Difference]: With dead ends: 2667 [2023-11-29 05:49:35,270 INFO L226 Difference]: Without dead ends: 1672 [2023-11-29 05:49:35,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:49:35,273 INFO L413 NwaCegarLoop]: 779 mSDtfsCounter, 388 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 1311 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 05:49:35,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 1311 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:49:35,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1672 states. [2023-11-29 05:49:35,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1672 to 1306. [2023-11-29 05:49:35,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1306 states, 1143 states have (on average 1.6351706036745406) internal successors, (1869), 1143 states have internal predecessors, (1869), 160 states have call successors, (160), 2 states have call predecessors, (160), 2 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2023-11-29 05:49:35,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1306 states to 1306 states and 2189 transitions. [2023-11-29 05:49:35,397 INFO L78 Accepts]: Start accepts. Automaton has 1306 states and 2189 transitions. Word has length 541 [2023-11-29 05:49:35,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:49:35,399 INFO L495 AbstractCegarLoop]: Abstraction has 1306 states and 2189 transitions. [2023-11-29 05:49:35,399 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 05:49:35,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1306 states and 2189 transitions. [2023-11-29 05:49:35,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2023-11-29 05:49:35,406 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:49:35,407 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:35,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:49:35,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:35,615 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:49:35,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:35,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1245252773, now seen corresponding path program 1 times [2023-11-29 05:49:35,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:49:35,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185617056] [2023-11-29 05:49:35,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:35,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:49:35,697 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:49:35,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [861906765] [2023-11-29 05:49:35,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:35,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:35,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:49:35,699 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:49:35,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:49:36,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:36,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:49:36,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 5893 proven. 84 refuted. 0 times theorem prover too weak. 6663 trivial. 0 not checked. [2023-11-29 05:49:36,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:49:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 153 proven. 84 refuted. 0 times theorem prover too weak. 12403 trivial. 0 not checked. [2023-11-29 05:49:36,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:49:36,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185617056] [2023-11-29 05:49:36,885 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:49:36,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861906765] [2023-11-29 05:49:36,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861906765] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:49:36,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:49:36,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 05:49:36,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352616435] [2023-11-29 05:49:36,887 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:49:36,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:49:36,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:49:36,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:49:36,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:49:36,890 INFO L87 Difference]: Start difference. First operand 1306 states and 2189 transitions. Second operand has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 2 states have call successors, (108), 2 states have call predecessors, (108), 4 states have return successors, (109), 2 states have call predecessors, (109), 2 states have call successors, (109) [2023-11-29 05:49:37,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:49:37,428 INFO L93 Difference]: Finished difference Result 2627 states and 4391 transitions. [2023-11-29 05:49:37,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:49:37,429 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 2 states have call successors, (108), 2 states have call predecessors, (108), 4 states have return successors, (109), 2 states have call predecessors, (109), 2 states have call successors, (109) Word has length 541 [2023-11-29 05:49:37,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:49:37,439 INFO L225 Difference]: With dead ends: 2627 [2023-11-29 05:49:37,439 INFO L226 Difference]: Without dead ends: 1322 [2023-11-29 05:49:37,441 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1084 GetRequests, 1074 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:49:37,442 INFO L413 NwaCegarLoop]: 470 mSDtfsCounter, 415 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 1248 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:49:37,443 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [465 Valid, 1248 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 432 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:49:37,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2023-11-29 05:49:37,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1314. [2023-11-29 05:49:37,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1149 states have (on average 1.6214099216710183) internal successors, (1863), 1149 states have internal predecessors, (1863), 160 states have call successors, (160), 4 states have call predecessors, (160), 4 states have return successors, (160), 160 states have call predecessors, (160), 160 states have call successors, (160) [2023-11-29 05:49:37,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 2183 transitions. [2023-11-29 05:49:37,554 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 2183 transitions. Word has length 541 [2023-11-29 05:49:37,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:49:37,555 INFO L495 AbstractCegarLoop]: Abstraction has 1314 states and 2183 transitions. [2023-11-29 05:49:37,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 2 states have call successors, (108), 2 states have call predecessors, (108), 4 states have return successors, (109), 2 states have call predecessors, (109), 2 states have call successors, (109) [2023-11-29 05:49:37,556 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 2183 transitions. [2023-11-29 05:49:37,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2023-11-29 05:49:37,562 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:49:37,563 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:37,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:49:37,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:37,764 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:49:37,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:37,764 INFO L85 PathProgramCache]: Analyzing trace with hash 277902119, now seen corresponding path program 1 times [2023-11-29 05:49:37,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:49:37,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283589146] [2023-11-29 05:49:37,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:37,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:49:37,844 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:49:37,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [263774645] [2023-11-29 05:49:37,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:37,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:37,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:49:37,846 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:49:37,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:49:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:38,360 INFO L262 TraceCheckSpWp]: Trace formula consists of 1306 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:49:38,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:38,482 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-29 05:49:38,483 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:49:38,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:49:38,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283589146] [2023-11-29 05:49:38,483 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:49:38,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263774645] [2023-11-29 05:49:38,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263774645] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:49:38,483 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:49:38,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 05:49:38,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268307232] [2023-11-29 05:49:38,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:49:38,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:49:38,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:49:38,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:49:38,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:49:38,486 INFO L87 Difference]: Start difference. First operand 1314 states and 2183 transitions. Second operand has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 05:49:41,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:49:41,435 INFO L93 Difference]: Finished difference Result 11711 states and 19398 transitions. [2023-11-29 05:49:41,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 05:49:41,436 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 541 [2023-11-29 05:49:41,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:49:41,483 INFO L225 Difference]: With dead ends: 11711 [2023-11-29 05:49:41,483 INFO L226 Difference]: Without dead ends: 10388 [2023-11-29 05:49:41,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 544 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:49:41,488 INFO L413 NwaCegarLoop]: 768 mSDtfsCounter, 4055 mSDsluCounter, 5440 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 774 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4055 SdHoareTripleChecker+Valid, 6208 SdHoareTripleChecker+Invalid, 1616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 774 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:49:41,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4055 Valid, 6208 Invalid, 1616 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [774 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-29 05:49:41,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10388 states. [2023-11-29 05:49:41,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10388 to 6386. [2023-11-29 05:49:41,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6386 states, 5899 states have (on average 1.6416341752839465) internal successors, (9684), 5906 states have internal predecessors, (9684), 474 states have call successors, (474), 12 states have call predecessors, (474), 12 states have return successors, (474), 467 states have call predecessors, (474), 474 states have call successors, (474) [2023-11-29 05:49:41,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6386 states to 6386 states and 10632 transitions. [2023-11-29 05:49:41,893 INFO L78 Accepts]: Start accepts. Automaton has 6386 states and 10632 transitions. Word has length 541 [2023-11-29 05:49:41,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:49:41,894 INFO L495 AbstractCegarLoop]: Abstraction has 6386 states and 10632 transitions. [2023-11-29 05:49:41,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 05:49:41,895 INFO L276 IsEmpty]: Start isEmpty. Operand 6386 states and 10632 transitions. [2023-11-29 05:49:41,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2023-11-29 05:49:41,907 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:49:41,907 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:41,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:49:42,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:42,108 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:49:42,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:42,109 INFO L85 PathProgramCache]: Analyzing trace with hash 731655847, now seen corresponding path program 1 times [2023-11-29 05:49:42,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:49:42,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459897524] [2023-11-29 05:49:42,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:42,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:49:42,228 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:49:42,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [984783952] [2023-11-29 05:49:42,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:42,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:42,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:49:42,230 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:49:42,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:49:42,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:42,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:49:42,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-29 05:49:43,161 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:49:43,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:49:43,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459897524] [2023-11-29 05:49:43,162 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:49:43,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984783952] [2023-11-29 05:49:43,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984783952] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:49:43,162 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:49:43,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:49:43,163 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300674781] [2023-11-29 05:49:43,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:49:43,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:49:43,164 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:49:43,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:49:43,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:49:43,165 INFO L87 Difference]: Start difference. First operand 6386 states and 10632 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, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 05:49:43,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:49:43,782 INFO L93 Difference]: Finished difference Result 17375 states and 28933 transitions. [2023-11-29 05:49:43,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:49:43,784 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, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 541 [2023-11-29 05:49:43,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:49:43,850 INFO L225 Difference]: With dead ends: 17375 [2023-11-29 05:49:43,850 INFO L226 Difference]: Without dead ends: 10990 [2023-11-29 05:49:43,862 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 541 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:49:43,863 INFO L413 NwaCegarLoop]: 844 mSDtfsCounter, 735 mSDsluCounter, 1098 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 1942 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:49:43,863 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [735 Valid, 1942 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:49:43,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10990 states. [2023-11-29 05:49:44,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10990 to 8915. [2023-11-29 05:49:44,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8915 states, 8209 states have (on average 1.639663783652089) internal successors, (13460), 8219 states have internal predecessors, (13460), 688 states have call successors, (688), 17 states have call predecessors, (688), 17 states have return successors, (688), 678 states have call predecessors, (688), 688 states have call successors, (688) [2023-11-29 05:49:44,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8915 states to 8915 states and 14836 transitions. [2023-11-29 05:49:44,424 INFO L78 Accepts]: Start accepts. Automaton has 8915 states and 14836 transitions. Word has length 541 [2023-11-29 05:49:44,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:49:44,425 INFO L495 AbstractCegarLoop]: Abstraction has 8915 states and 14836 transitions. [2023-11-29 05:49:44,426 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, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 05:49:44,426 INFO L276 IsEmpty]: Start isEmpty. Operand 8915 states and 14836 transitions. [2023-11-29 05:49:44,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2023-11-29 05:49:44,439 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:49:44,440 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:44,448 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 05:49:44,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:44,641 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:49:44,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:44,641 INFO L85 PathProgramCache]: Analyzing trace with hash 601304487, now seen corresponding path program 1 times [2023-11-29 05:49:44,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:49:44,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711149886] [2023-11-29 05:49:44,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:44,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:49:44,713 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:49:44,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [538007470] [2023-11-29 05:49:44,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:44,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:44,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:49:44,715 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:49:44,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:49:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:45,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 1311 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:49:45,163 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 6243 proven. 99 refuted. 0 times theorem prover too weak. 6298 trivial. 0 not checked. [2023-11-29 05:49:45,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:49:45,810 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 138 proven. 99 refuted. 0 times theorem prover too weak. 12403 trivial. 0 not checked. [2023-11-29 05:49:45,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:49:45,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711149886] [2023-11-29 05:49:45,810 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:49:45,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538007470] [2023-11-29 05:49:45,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538007470] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:49:45,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:49:45,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-29 05:49:45,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775571094] [2023-11-29 05:49:45,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:49:45,812 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:49:45,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:49:45,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:49:45,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:49:45,814 INFO L87 Difference]: Start difference. First operand 8915 states and 14836 transitions. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 2 states have call successors, (113), 2 states have call predecessors, (113), 4 states have return successors, (114), 2 states have call predecessors, (114), 2 states have call successors, (114) [2023-11-29 05:49:47,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:49:47,522 INFO L93 Difference]: Finished difference Result 13289 states and 22038 transitions. [2023-11-29 05:49:47,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:49:47,523 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 2 states have call successors, (113), 2 states have call predecessors, (113), 4 states have return successors, (114), 2 states have call predecessors, (114), 2 states have call successors, (114) Word has length 541 [2023-11-29 05:49:47,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:49:47,537 INFO L225 Difference]: With dead ends: 13289 [2023-11-29 05:49:47,538 INFO L226 Difference]: Without dead ends: 4336 [2023-11-29 05:49:47,548 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1091 GetRequests, 1073 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:49:47,549 INFO L413 NwaCegarLoop]: 619 mSDtfsCounter, 1436 mSDsluCounter, 1060 mSDsCounter, 0 mSdLazyCounter, 886 mSolverCounterSat, 444 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1437 SdHoareTripleChecker+Valid, 1679 SdHoareTripleChecker+Invalid, 1330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 444 IncrementalHoareTripleChecker+Valid, 886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:49:47,549 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1437 Valid, 1679 Invalid, 1330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [444 Valid, 886 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 05:49:47,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4336 states. [2023-11-29 05:49:47,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4336 to 4179. [2023-11-29 05:49:47,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4179 states, 3662 states have (on average 1.5832878208629164) internal successors, (5798), 3667 states have internal predecessors, (5798), 498 states have call successors, (498), 18 states have call predecessors, (498), 18 states have return successors, (498), 493 states have call predecessors, (498), 498 states have call successors, (498) [2023-11-29 05:49:47,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6794 transitions. [2023-11-29 05:49:47,791 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6794 transitions. Word has length 541 [2023-11-29 05:49:47,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:49:47,792 INFO L495 AbstractCegarLoop]: Abstraction has 4179 states and 6794 transitions. [2023-11-29 05:49:47,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 8 states have internal predecessors, (153), 2 states have call successors, (113), 2 states have call predecessors, (113), 4 states have return successors, (114), 2 states have call predecessors, (114), 2 states have call successors, (114) [2023-11-29 05:49:47,792 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6794 transitions. [2023-11-29 05:49:47,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2023-11-29 05:49:47,825 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:49:47,826 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:47,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:49:48,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:48,028 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:49:48,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:48,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1496563541, now seen corresponding path program 1 times [2023-11-29 05:49:48,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:49:48,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566235489] [2023-11-29 05:49:48,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:48,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:49:48,093 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:49:48,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1699396095] [2023-11-29 05:49:48,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:48,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:48,094 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:49:48,095 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:49:48,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:49:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:48,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 1305 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:49:48,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:48,606 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-29 05:49:48,606 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:49:48,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:49:48,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566235489] [2023-11-29 05:49:48,607 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:49:48,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699396095] [2023-11-29 05:49:48,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699396095] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:49:48,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:49:48,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:49:48,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814358672] [2023-11-29 05:49:48,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:49:48,608 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:49:48,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:49:48,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:49:48,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:49:48,610 INFO L87 Difference]: Start difference. First operand 4179 states and 6794 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 05:49:48,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:49:48,858 INFO L93 Difference]: Finished difference Result 8992 states and 14577 transitions. [2023-11-29 05:49:48,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:49:48,860 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 541 [2023-11-29 05:49:48,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:49:48,876 INFO L225 Difference]: With dead ends: 8992 [2023-11-29 05:49:48,876 INFO L226 Difference]: Without dead ends: 4955 [2023-11-29 05:49:48,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:49:48,882 INFO L413 NwaCegarLoop]: 1003 mSDtfsCounter, 485 mSDsluCounter, 519 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 1522 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:49:48,883 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 1522 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:49:48,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4955 states. [2023-11-29 05:49:49,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4955 to 4179. [2023-11-29 05:49:49,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4179 states, 3662 states have (on average 1.5767340251228836) internal successors, (5774), 3667 states have internal predecessors, (5774), 498 states have call successors, (498), 18 states have call predecessors, (498), 18 states have return successors, (498), 493 states have call predecessors, (498), 498 states have call successors, (498) [2023-11-29 05:49:49,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4179 states to 4179 states and 6770 transitions. [2023-11-29 05:49:49,195 INFO L78 Accepts]: Start accepts. Automaton has 4179 states and 6770 transitions. Word has length 541 [2023-11-29 05:49:49,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:49:49,196 INFO L495 AbstractCegarLoop]: Abstraction has 4179 states and 6770 transitions. [2023-11-29 05:49:49,196 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 05:49:49,196 INFO L276 IsEmpty]: Start isEmpty. Operand 4179 states and 6770 transitions. [2023-11-29 05:49:49,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2023-11-29 05:49:49,202 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:49:49,202 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:49,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 05:49:49,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:49,403 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:49:49,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:49,404 INFO L85 PathProgramCache]: Analyzing trace with hash -438725463, now seen corresponding path program 1 times [2023-11-29 05:49:49,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:49:49,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059793722] [2023-11-29 05:49:49,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:49,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:49:49,485 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:49:49,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1534105339] [2023-11-29 05:49:49,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:49,486 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:49,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:49:49,487 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:49:49,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:49:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:49,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 1304 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:49:49,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-29 05:49:50,118 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:49:50,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:49:50,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059793722] [2023-11-29 05:49:50,118 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:49:50,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534105339] [2023-11-29 05:49:50,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534105339] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:49:50,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:49:50,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 05:49:50,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134024418] [2023-11-29 05:49:50,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:49:50,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:49:50,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:49:50,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:49:50,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:49:50,121 INFO L87 Difference]: Start difference. First operand 4179 states and 6770 transitions. Second operand has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 05:49:51,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:49:51,517 INFO L93 Difference]: Finished difference Result 11067 states and 17865 transitions. [2023-11-29 05:49:51,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:49:51,518 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 541 [2023-11-29 05:49:51,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:49:51,533 INFO L225 Difference]: With dead ends: 11067 [2023-11-29 05:49:51,533 INFO L226 Difference]: Without dead ends: 7030 [2023-11-29 05:49:51,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 549 GetRequests, 538 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-29 05:49:51,541 INFO L413 NwaCegarLoop]: 1157 mSDtfsCounter, 2548 mSDsluCounter, 2826 mSDsCounter, 0 mSdLazyCounter, 483 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2548 SdHoareTripleChecker+Valid, 3983 SdHoareTripleChecker+Invalid, 947 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 05:49:51,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2548 Valid, 3983 Invalid, 947 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 483 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 05:49:51,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7030 states. [2023-11-29 05:49:51,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7030 to 4341. [2023-11-29 05:49:51,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4341 states, 3776 states have (on average 1.5548199152542372) internal successors, (5871), 3781 states have internal predecessors, (5871), 542 states have call successors, (542), 22 states have call predecessors, (542), 22 states have return successors, (542), 537 states have call predecessors, (542), 542 states have call successors, (542) [2023-11-29 05:49:51,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4341 states to 4341 states and 6955 transitions. [2023-11-29 05:49:51,902 INFO L78 Accepts]: Start accepts. Automaton has 4341 states and 6955 transitions. Word has length 541 [2023-11-29 05:49:51,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:49:51,903 INFO L495 AbstractCegarLoop]: Abstraction has 4341 states and 6955 transitions. [2023-11-29 05:49:51,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.0) internal successors, (144), 6 states have internal predecessors, (144), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 05:49:51,903 INFO L276 IsEmpty]: Start isEmpty. Operand 4341 states and 6955 transitions. [2023-11-29 05:49:51,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 542 [2023-11-29 05:49:51,908 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:49:51,908 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:51,915 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 05:49:52,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 05:49:52,109 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:49:52,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:52,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1157607207, now seen corresponding path program 1 times [2023-11-29 05:49:52,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:49:52,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967002878] [2023-11-29 05:49:52,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:52,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:49:52,183 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:49:52,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2130601161] [2023-11-29 05:49:52,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:52,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:52,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:49:52,185 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:49:52,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 05:49:52,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:52,637 INFO L262 TraceCheckSpWp]: Trace formula consists of 1305 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 05:49:52,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:53,075 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-29 05:49:53,075 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:49:53,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:49:53,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967002878] [2023-11-29 05:49:53,075 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:49:53,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130601161] [2023-11-29 05:49:53,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2130601161] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:49:53,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:49:53,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:49:53,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110352805] [2023-11-29 05:49:53,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:49:53,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:49:53,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:49:53,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:49:53,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:49:53,078 INFO L87 Difference]: Start difference. First operand 4341 states and 6955 transitions. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 05:49:53,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:49:53,448 INFO L93 Difference]: Finished difference Result 13021 states and 20863 transitions. [2023-11-29 05:49:53,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:49:53,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 541 [2023-11-29 05:49:53,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:49:53,475 INFO L225 Difference]: With dead ends: 13021 [2023-11-29 05:49:53,475 INFO L226 Difference]: Without dead ends: 8681 [2023-11-29 05:49:53,486 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 540 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:49:53,487 INFO L413 NwaCegarLoop]: 697 mSDtfsCounter, 272 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:49:53,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [272 Valid, 1218 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:49:53,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8681 states. [2023-11-29 05:49:54,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8681 to 8679. [2023-11-29 05:49:54,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8679 states, 7550 states have (on average 1.5411920529801324) internal successors, (11636), 7560 states have internal predecessors, (11636), 1084 states have call successors, (1084), 44 states have call predecessors, (1084), 44 states have return successors, (1084), 1074 states have call predecessors, (1084), 1084 states have call successors, (1084) [2023-11-29 05:49:54,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8679 states to 8679 states and 13804 transitions. [2023-11-29 05:49:54,357 INFO L78 Accepts]: Start accepts. Automaton has 8679 states and 13804 transitions. Word has length 541 [2023-11-29 05:49:54,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:49:54,358 INFO L495 AbstractCegarLoop]: Abstraction has 8679 states and 13804 transitions. [2023-11-29 05:49:54,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 2 states have internal predecessors, (144), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 05:49:54,358 INFO L276 IsEmpty]: Start isEmpty. Operand 8679 states and 13804 transitions. [2023-11-29 05:49:54,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2023-11-29 05:49:54,366 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:49:54,367 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:54,398 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 05:49:54,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:54,567 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:49:54,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:54,568 INFO L85 PathProgramCache]: Analyzing trace with hash -624032153, now seen corresponding path program 1 times [2023-11-29 05:49:54,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:49:54,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409628669] [2023-11-29 05:49:54,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:54,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:49:54,639 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:49:54,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [488520066] [2023-11-29 05:49:54,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:54,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:54,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:49:54,641 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:49:54,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 05:49:55,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:55,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 1306 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 05:49:55,023 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:55,449 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12640 trivial. 0 not checked. [2023-11-29 05:49:55,449 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:49:55,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:49:55,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409628669] [2023-11-29 05:49:55,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:49:55,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488520066] [2023-11-29 05:49:55,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [488520066] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:49:55,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:49:55,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:49:55,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196371257] [2023-11-29 05:49:55,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:49:55,451 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:49:55,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:49:55,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:49:55,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:49:55,451 INFO L87 Difference]: Start difference. First operand 8679 states and 13804 transitions. Second operand has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 05:49:57,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:49:57,148 INFO L93 Difference]: Finished difference Result 16223 states and 25752 transitions. [2023-11-29 05:49:57,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 05:49:57,149 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) Word has length 542 [2023-11-29 05:49:57,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:49:57,170 INFO L225 Difference]: With dead ends: 16223 [2023-11-29 05:49:57,170 INFO L226 Difference]: Without dead ends: 11517 [2023-11-29 05:49:57,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 539 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2023-11-29 05:49:57,179 INFO L413 NwaCegarLoop]: 1154 mSDtfsCounter, 4840 mSDsluCounter, 2825 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 990 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4840 SdHoareTripleChecker+Valid, 3979 SdHoareTripleChecker+Invalid, 1319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 990 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:49:57,179 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4840 Valid, 3979 Invalid, 1319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [990 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 05:49:57,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11517 states. [2023-11-29 05:49:57,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11517 to 8679. [2023-11-29 05:49:57,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8679 states, 7550 states have (on average 1.5401324503311258) internal successors, (11628), 7560 states have internal predecessors, (11628), 1084 states have call successors, (1084), 44 states have call predecessors, (1084), 44 states have return successors, (1084), 1074 states have call predecessors, (1084), 1084 states have call successors, (1084) [2023-11-29 05:49:57,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8679 states to 8679 states and 13796 transitions. [2023-11-29 05:49:57,886 INFO L78 Accepts]: Start accepts. Automaton has 8679 states and 13796 transitions. Word has length 542 [2023-11-29 05:49:57,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:49:57,887 INFO L495 AbstractCegarLoop]: Abstraction has 8679 states and 13796 transitions. [2023-11-29 05:49:57,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 20.714285714285715) internal successors, (145), 7 states have internal predecessors, (145), 1 states have call successors, (80), 1 states have call predecessors, (80), 1 states have return successors, (80), 1 states have call predecessors, (80), 1 states have call successors, (80) [2023-11-29 05:49:57,887 INFO L276 IsEmpty]: Start isEmpty. Operand 8679 states and 13796 transitions. [2023-11-29 05:49:57,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 543 [2023-11-29 05:49:57,892 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:49:57,893 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:49:57,900 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 05:49:58,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 05:49:58,094 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:49:58,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:49:58,094 INFO L85 PathProgramCache]: Analyzing trace with hash 627367496, now seen corresponding path program 1 times [2023-11-29 05:49:58,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:49:58,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084762071] [2023-11-29 05:49:58,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:58,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:49:58,190 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:49:58,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [412696703] [2023-11-29 05:49:58,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:49:58,191 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:49:58,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:49:58,192 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:49:58,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 05:49:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:49:58,698 INFO L262 TraceCheckSpWp]: Trace formula consists of 1306 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:49:58,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:49:59,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 2617 proven. 210 refuted. 0 times theorem prover too weak. 9813 trivial. 0 not checked. [2023-11-29 05:49:59,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:49:59,686 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 27 proven. 210 refuted. 0 times theorem prover too weak. 12403 trivial. 0 not checked. [2023-11-29 05:49:59,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:49:59,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084762071] [2023-11-29 05:49:59,686 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:49:59,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412696703] [2023-11-29 05:49:59,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [412696703] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:49:59,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:49:59,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-29 05:49:59,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808096361] [2023-11-29 05:49:59,687 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:49:59,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:49:59,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:49:59,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:49:59,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:49:59,691 INFO L87 Difference]: Start difference. First operand 8679 states and 13796 transitions. Second operand has 8 states, 8 states have (on average 32.5) internal successors, (260), 8 states have internal predecessors, (260), 3 states have call successors, (150), 2 states have call predecessors, (150), 4 states have return successors, (151), 3 states have call predecessors, (151), 3 states have call successors, (151) [2023-11-29 05:50:00,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:50:00,566 INFO L93 Difference]: Finished difference Result 17497 states and 27713 transitions. [2023-11-29 05:50:00,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:50:00,567 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 32.5) internal successors, (260), 8 states have internal predecessors, (260), 3 states have call successors, (150), 2 states have call predecessors, (150), 4 states have return successors, (151), 3 states have call predecessors, (151), 3 states have call successors, (151) Word has length 542 [2023-11-29 05:50:00,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:50:00,579 INFO L225 Difference]: With dead ends: 17497 [2023-11-29 05:50:00,579 INFO L226 Difference]: Without dead ends: 8819 [2023-11-29 05:50:00,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1086 GetRequests, 1076 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:50:00,589 INFO L413 NwaCegarLoop]: 415 mSDtfsCounter, 570 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 579 SdHoareTripleChecker+Valid, 1082 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:50:00,590 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [579 Valid, 1082 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:50:00,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8819 states. [2023-11-29 05:50:01,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8819 to 8751. [2023-11-29 05:50:01,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8751 states, 7604 states have (on average 1.5089426617569701) internal successors, (11474), 7614 states have internal predecessors, (11474), 1084 states have call successors, (1084), 62 states have call predecessors, (1084), 62 states have return successors, (1084), 1074 states have call predecessors, (1084), 1084 states have call successors, (1084) [2023-11-29 05:50:01,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8751 states to 8751 states and 13642 transitions. [2023-11-29 05:50:01,468 INFO L78 Accepts]: Start accepts. Automaton has 8751 states and 13642 transitions. Word has length 542 [2023-11-29 05:50:01,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:50:01,469 INFO L495 AbstractCegarLoop]: Abstraction has 8751 states and 13642 transitions. [2023-11-29 05:50:01,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 32.5) internal successors, (260), 8 states have internal predecessors, (260), 3 states have call successors, (150), 2 states have call predecessors, (150), 4 states have return successors, (151), 3 states have call predecessors, (151), 3 states have call successors, (151) [2023-11-29 05:50:01,469 INFO L276 IsEmpty]: Start isEmpty. Operand 8751 states and 13642 transitions. [2023-11-29 05:50:01,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2023-11-29 05:50:01,475 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:50:01,476 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:50:01,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-29 05:50:01,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 05:50:01,676 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:50:01,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:50:01,677 INFO L85 PathProgramCache]: Analyzing trace with hash -1688702566, now seen corresponding path program 1 times [2023-11-29 05:50:01,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:50:01,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516886413] [2023-11-29 05:50:01,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:50:01,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:50:01,728 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:50:01,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [604489368] [2023-11-29 05:50:01,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:50:01,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:50:01,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:50:01,730 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:50:01,735 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 05:50:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:50:02,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:50:02,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:50:02,465 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 6327 proven. 105 refuted. 0 times theorem prover too weak. 6208 trivial. 0 not checked. [2023-11-29 05:50:02,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:50:02,736 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 132 proven. 105 refuted. 0 times theorem prover too weak. 12403 trivial. 0 not checked. [2023-11-29 05:50:02,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:50:02,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516886413] [2023-11-29 05:50:02,736 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:50:02,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604489368] [2023-11-29 05:50:02,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604489368] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:50:02,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:50:02,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-29 05:50:02,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379773000] [2023-11-29 05:50:02,737 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:50:02,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:50:02,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:50:02,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:50:02,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:50:02,740 INFO L87 Difference]: Start difference. First operand 8751 states and 13642 transitions. Second operand has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 2 states have call successors, (115), 2 states have call predecessors, (115), 4 states have return successors, (116), 2 states have call predecessors, (116), 2 states have call successors, (116) [2023-11-29 05:50:04,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:50:04,241 INFO L93 Difference]: Finished difference Result 16183 states and 25068 transitions. [2023-11-29 05:50:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:50:04,242 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 2 states have call successors, (115), 2 states have call predecessors, (115), 4 states have return successors, (116), 2 states have call predecessors, (116), 2 states have call successors, (116) Word has length 543 [2023-11-29 05:50:04,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:50:04,252 INFO L225 Difference]: With dead ends: 16183 [2023-11-29 05:50:04,252 INFO L226 Difference]: Without dead ends: 7433 [2023-11-29 05:50:04,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1096 GetRequests, 1077 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:50:04,259 INFO L413 NwaCegarLoop]: 535 mSDtfsCounter, 1137 mSDsluCounter, 1379 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1226 SdHoareTripleChecker+Valid, 1914 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 05:50:04,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1226 Valid, 1914 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 05:50:04,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7433 states. [2023-11-29 05:50:04,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7433 to 6518. [2023-11-29 05:50:04,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6518 states, 5496 states have (on average 1.4887190684133915) internal successors, (8182), 5503 states have internal predecessors, (8182), 954 states have call successors, (954), 67 states have call predecessors, (954), 67 states have return successors, (954), 947 states have call predecessors, (954), 954 states have call successors, (954) [2023-11-29 05:50:04,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6518 states to 6518 states and 10090 transitions. [2023-11-29 05:50:04,867 INFO L78 Accepts]: Start accepts. Automaton has 6518 states and 10090 transitions. Word has length 543 [2023-11-29 05:50:04,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:50:04,868 INFO L495 AbstractCegarLoop]: Abstraction has 6518 states and 10090 transitions. [2023-11-29 05:50:04,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 2 states have call successors, (115), 2 states have call predecessors, (115), 4 states have return successors, (116), 2 states have call predecessors, (116), 2 states have call successors, (116) [2023-11-29 05:50:04,869 INFO L276 IsEmpty]: Start isEmpty. Operand 6518 states and 10090 transitions. [2023-11-29 05:50:04,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2023-11-29 05:50:04,877 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:50:04,877 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:50:04,885 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 05:50:05,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:50:05,078 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:50:05,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:50:05,079 INFO L85 PathProgramCache]: Analyzing trace with hash 540346828, now seen corresponding path program 1 times [2023-11-29 05:50:05,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:50:05,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996540989] [2023-11-29 05:50:05,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:50:05,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:50:05,149 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:50:05,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [252611176] [2023-11-29 05:50:05,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:50:05,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:50:05,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:50:05,151 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:50:05,152 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 05:50:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:50:05,696 INFO L262 TraceCheckSpWp]: Trace formula consists of 1307 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:50:05,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:50:07,321 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 2617 proven. 210 refuted. 0 times theorem prover too weak. 9813 trivial. 0 not checked. [2023-11-29 05:50:07,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:50:08,007 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 27 proven. 210 refuted. 0 times theorem prover too weak. 12403 trivial. 0 not checked. [2023-11-29 05:50:08,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:50:08,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996540989] [2023-11-29 05:50:08,008 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:50:08,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252611176] [2023-11-29 05:50:08,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252611176] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:50:08,008 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:50:08,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 10 [2023-11-29 05:50:08,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113126713] [2023-11-29 05:50:08,009 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:50:08,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:50:08,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:50:08,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:50:08,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:50:08,014 INFO L87 Difference]: Start difference. First operand 6518 states and 10090 transitions. Second operand has 10 states, 10 states have (on average 27.3) internal successors, (273), 10 states have internal predecessors, (273), 4 states have call successors, (160), 3 states have call predecessors, (160), 5 states have return successors, (160), 4 states have call predecessors, (160), 4 states have call successors, (160) [2023-11-29 05:50:11,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:50:11,950 INFO L93 Difference]: Finished difference Result 20182 states and 31382 transitions. [2023-11-29 05:50:11,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:50:11,951 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 27.3) internal successors, (273), 10 states have internal predecessors, (273), 4 states have call successors, (160), 3 states have call predecessors, (160), 5 states have return successors, (160), 4 states have call predecessors, (160), 4 states have call successors, (160) Word has length 543 [2023-11-29 05:50:11,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:50:11,977 INFO L225 Difference]: With dead ends: 20182 [2023-11-29 05:50:11,977 INFO L226 Difference]: Without dead ends: 13750 [2023-11-29 05:50:11,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1093 GetRequests, 1078 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:50:11,987 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 2746 mSDsluCounter, 2396 mSDsCounter, 0 mSdLazyCounter, 1662 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2835 SdHoareTripleChecker+Valid, 2819 SdHoareTripleChecker+Invalid, 2093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 1662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-29 05:50:11,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2835 Valid, 2819 Invalid, 2093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 1662 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-29 05:50:12,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13750 states. [2023-11-29 05:50:13,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13750 to 12853. [2023-11-29 05:50:13,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12853 states, 11205 states have (on average 1.498438197233378) internal successors, (16790), 11229 states have internal predecessors, (16790), 1534 states have call successors, (1534), 113 states have call predecessors, (1534), 113 states have return successors, (1534), 1510 states have call predecessors, (1534), 1534 states have call successors, (1534) [2023-11-29 05:50:13,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12853 states to 12853 states and 19858 transitions. [2023-11-29 05:50:13,284 INFO L78 Accepts]: Start accepts. Automaton has 12853 states and 19858 transitions. Word has length 543 [2023-11-29 05:50:13,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:50:13,285 INFO L495 AbstractCegarLoop]: Abstraction has 12853 states and 19858 transitions. [2023-11-29 05:50:13,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 27.3) internal successors, (273), 10 states have internal predecessors, (273), 4 states have call successors, (160), 3 states have call predecessors, (160), 5 states have return successors, (160), 4 states have call predecessors, (160), 4 states have call successors, (160) [2023-11-29 05:50:13,286 INFO L276 IsEmpty]: Start isEmpty. Operand 12853 states and 19858 transitions. [2023-11-29 05:50:13,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 544 [2023-11-29 05:50:13,295 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:50:13,296 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:50:13,308 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 05:50:13,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:50:13,497 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:50:13,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:50:13,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1926550222, now seen corresponding path program 1 times [2023-11-29 05:50:13,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:50:13,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426334352] [2023-11-29 05:50:13,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:50:13,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:50:13,591 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:50:13,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1826698651] [2023-11-29 05:50:13,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:50:13,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:50:13,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:50:13,593 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:50:13,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 05:50:14,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:50:14,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 1309 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 05:50:14,364 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:50:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 5407 proven. 165 refuted. 0 times theorem prover too weak. 7068 trivial. 0 not checked. [2023-11-29 05:50:15,966 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:50:16,646 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 72 proven. 165 refuted. 0 times theorem prover too weak. 12403 trivial. 0 not checked. [2023-11-29 05:50:16,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:50:16,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426334352] [2023-11-29 05:50:16,646 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:50:16,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826698651] [2023-11-29 05:50:16,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1826698651] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:50:16,647 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:50:16,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-29 05:50:16,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616788909] [2023-11-29 05:50:16,648 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:50:16,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 05:50:16,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:50:16,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 05:50:16,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-29 05:50:16,651 INFO L87 Difference]: Start difference. First operand 12853 states and 19858 transitions. Second operand has 14 states, 14 states have (on average 15.428571428571429) internal successors, (216), 14 states have internal predecessors, (216), 4 states have call successors, (160), 3 states have call predecessors, (160), 5 states have return successors, (160), 4 states have call predecessors, (160), 4 states have call successors, (160) [2023-11-29 05:50:22,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:50:22,685 INFO L93 Difference]: Finished difference Result 55457 states and 86215 transitions. [2023-11-29 05:50:22,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 05:50:22,686 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 15.428571428571429) internal successors, (216), 14 states have internal predecessors, (216), 4 states have call successors, (160), 3 states have call predecessors, (160), 5 states have return successors, (160), 4 states have call predecessors, (160), 4 states have call successors, (160) Word has length 543 [2023-11-29 05:50:22,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:50:22,734 INFO L225 Difference]: With dead ends: 55457 [2023-11-29 05:50:22,734 INFO L226 Difference]: Without dead ends: 42690 [2023-11-29 05:50:22,749 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1108 GetRequests, 1076 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=297, Invalid=825, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 05:50:22,750 INFO L413 NwaCegarLoop]: 691 mSDtfsCounter, 3909 mSDsluCounter, 6442 mSDsCounter, 0 mSdLazyCounter, 2166 mSolverCounterSat, 1067 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3988 SdHoareTripleChecker+Valid, 7133 SdHoareTripleChecker+Invalid, 3233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1067 IncrementalHoareTripleChecker+Valid, 2166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:50:22,750 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3988 Valid, 7133 Invalid, 3233 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1067 Valid, 2166 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2023-11-29 05:50:22,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42690 states. [2023-11-29 05:50:24,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42690 to 21166. [2023-11-29 05:50:24,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21166 states, 18261 states have (on average 1.4889107934943322) internal successors, (27189), 18297 states have internal predecessors, (27189), 2690 states have call successors, (2690), 214 states have call predecessors, (2690), 214 states have return successors, (2690), 2654 states have call predecessors, (2690), 2690 states have call successors, (2690) [2023-11-29 05:50:24,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21166 states to 21166 states and 32569 transitions. [2023-11-29 05:50:24,626 INFO L78 Accepts]: Start accepts. Automaton has 21166 states and 32569 transitions. Word has length 543 [2023-11-29 05:50:24,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:50:24,627 INFO L495 AbstractCegarLoop]: Abstraction has 21166 states and 32569 transitions. [2023-11-29 05:50:24,628 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 15.428571428571429) internal successors, (216), 14 states have internal predecessors, (216), 4 states have call successors, (160), 3 states have call predecessors, (160), 5 states have return successors, (160), 4 states have call predecessors, (160), 4 states have call successors, (160) [2023-11-29 05:50:24,628 INFO L276 IsEmpty]: Start isEmpty. Operand 21166 states and 32569 transitions. [2023-11-29 05:50:24,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2023-11-29 05:50:24,633 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:50:24,634 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:50:24,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-29 05:50:24,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 05:50:24,834 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:50:24,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:50:24,835 INFO L85 PathProgramCache]: Analyzing trace with hash 947144293, now seen corresponding path program 1 times [2023-11-29 05:50:24,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:50:24,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848771911] [2023-11-29 05:50:24,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:50:24,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:50:24,898 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:50:24,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1561573643] [2023-11-29 05:50:24,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:50:24,899 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:50:24,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:50:24,900 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:50:24,904 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 05:50:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:50:25,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 05:50:25,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:50:28,289 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 4322 proven. 591 refuted. 0 times theorem prover too weak. 7727 trivial. 0 not checked. [2023-11-29 05:50:28,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:50:30,551 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 102 proven. 600 refuted. 0 times theorem prover too weak. 11938 trivial. 0 not checked. [2023-11-29 05:50:30,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:50:30,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848771911] [2023-11-29 05:50:30,551 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:50:30,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561573643] [2023-11-29 05:50:30,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561573643] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:50:30,552 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:50:30,552 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2023-11-29 05:50:30,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278860209] [2023-11-29 05:50:30,552 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:50:30,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 05:50:30,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:50:30,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 05:50:30,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2023-11-29 05:50:30,556 INFO L87 Difference]: Start difference. First operand 21166 states and 32569 transitions. Second operand has 22 states, 22 states have (on average 12.363636363636363) internal successors, (272), 22 states have internal predecessors, (272), 7 states have call successors, (151), 4 states have call predecessors, (151), 10 states have return successors, (152), 7 states have call predecessors, (152), 7 states have call successors, (152) [2023-11-29 05:50:35,227 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.09s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 05:50:42,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:50:42,442 INFO L93 Difference]: Finished difference Result 68195 states and 102516 transitions. [2023-11-29 05:50:42,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-29 05:50:42,443 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 12.363636363636363) internal successors, (272), 22 states have internal predecessors, (272), 7 states have call successors, (151), 4 states have call predecessors, (151), 10 states have return successors, (152), 7 states have call predecessors, (152), 7 states have call successors, (152) Word has length 544 [2023-11-29 05:50:42,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:50:42,510 INFO L225 Difference]: With dead ends: 68195 [2023-11-29 05:50:42,510 INFO L226 Difference]: Without dead ends: 48301 [2023-11-29 05:50:42,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1137 GetRequests, 1072 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1229 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1136, Invalid=3286, Unknown=0, NotChecked=0, Total=4422 [2023-11-29 05:50:42,532 INFO L413 NwaCegarLoop]: 669 mSDtfsCounter, 3156 mSDsluCounter, 2376 mSDsCounter, 0 mSdLazyCounter, 2116 mSolverCounterSat, 552 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3163 SdHoareTripleChecker+Valid, 3045 SdHoareTripleChecker+Invalid, 2668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 552 IncrementalHoareTripleChecker+Valid, 2116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:50:42,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3163 Valid, 3045 Invalid, 2668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [552 Valid, 2116 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-11-29 05:50:42,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48301 states. [2023-11-29 05:50:44,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48301 to 24118. [2023-11-29 05:50:44,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24118 states, 21150 states have (on average 1.4741371158392436) internal successors, (31178), 21186 states have internal predecessors, (31178), 2642 states have call successors, (2642), 325 states have call predecessors, (2642), 325 states have return successors, (2642), 2606 states have call predecessors, (2642), 2642 states have call successors, (2642) [2023-11-29 05:50:44,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24118 states to 24118 states and 36462 transitions. [2023-11-29 05:50:44,868 INFO L78 Accepts]: Start accepts. Automaton has 24118 states and 36462 transitions. Word has length 544 [2023-11-29 05:50:44,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:50:44,869 INFO L495 AbstractCegarLoop]: Abstraction has 24118 states and 36462 transitions. [2023-11-29 05:50:44,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 12.363636363636363) internal successors, (272), 22 states have internal predecessors, (272), 7 states have call successors, (151), 4 states have call predecessors, (151), 10 states have return successors, (152), 7 states have call predecessors, (152), 7 states have call successors, (152) [2023-11-29 05:50:44,869 INFO L276 IsEmpty]: Start isEmpty. Operand 24118 states and 36462 transitions. [2023-11-29 05:50:44,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2023-11-29 05:50:44,875 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:50:44,875 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:50:44,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 05:50:45,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:50:45,076 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:50:45,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:50:45,076 INFO L85 PathProgramCache]: Analyzing trace with hash 918644003, now seen corresponding path program 1 times [2023-11-29 05:50:45,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:50:45,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516293006] [2023-11-29 05:50:45,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:50:45,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:50:45,126 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:50:45,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [340358895] [2023-11-29 05:50:45,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:50:45,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:50:45,127 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:50:45,127 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:50:45,130 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 05:50:45,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:50:45,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 67 conjunts are in the unsatisfiable core [2023-11-29 05:50:45,830 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:50:52,473 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 9709 proven. 975 refuted. 0 times theorem prover too weak. 1956 trivial. 0 not checked. [2023-11-29 05:50:52,473 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:51:36,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:51:36,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516293006] [2023-11-29 05:51:36,677 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:51:36,677 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340358895] [2023-11-29 05:51:36,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340358895] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:51:36,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:51:36,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2023-11-29 05:51:36,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14797473] [2023-11-29 05:51:36,678 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 05:51:36,679 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 05:51:36,679 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:51:36,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 05:51:36,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1890, Unknown=3, NotChecked=0, Total=2256 [2023-11-29 05:51:36,681 INFO L87 Difference]: Start difference. First operand 24118 states and 36462 transitions. Second operand has 33 states, 33 states have (on average 5.818181818181818) internal successors, (192), 31 states have internal predecessors, (192), 9 states have call successors, (80), 9 states have call predecessors, (80), 16 states have return successors, (80), 9 states have call predecessors, (80), 9 states have call successors, (80) [2023-11-29 05:52:33,657 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:52:37,757 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:52:41,303 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:52:46,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:52:51,342 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:52:55,945 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:53:06,210 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:53:10,318 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:53:14,501 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 [0] [2023-11-29 05:53:22,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:53:22,841 INFO L93 Difference]: Finished difference Result 185649 states and 281260 transitions. [2023-11-29 05:53:22,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-29 05:53:22,844 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.818181818181818) internal successors, (192), 31 states have internal predecessors, (192), 9 states have call successors, (80), 9 states have call predecessors, (80), 16 states have return successors, (80), 9 states have call predecessors, (80), 9 states have call successors, (80) Word has length 544 [2023-11-29 05:53:22,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:53:23,190 INFO L225 Difference]: With dead ends: 185649 [2023-11-29 05:53:23,190 INFO L226 Difference]: Without dead ends: 161982 [2023-11-29 05:53:23,241 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 746 GetRequests, 640 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3081 ImplicationChecksByTransitivity, 66.2s TimeCoverageRelationStatistics Valid=2208, Invalid=9343, Unknown=5, NotChecked=0, Total=11556 [2023-11-29 05:53:23,242 INFO L413 NwaCegarLoop]: 728 mSDtfsCounter, 5644 mSDsluCounter, 8842 mSDsCounter, 0 mSdLazyCounter, 7134 mSolverCounterSat, 353 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 54.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5644 SdHoareTripleChecker+Valid, 9570 SdHoareTripleChecker+Invalid, 7494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 353 IncrementalHoareTripleChecker+Valid, 7134 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 55.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:53:23,242 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5644 Valid, 9570 Invalid, 7494 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [353 Valid, 7134 Invalid, 7 Unknown, 0 Unchecked, 55.6s Time] [2023-11-29 05:53:23,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161982 states. [2023-11-29 05:53:30,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161982 to 63376. [2023-11-29 05:53:30,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63376 states, 56689 states have (on average 1.4842738450140238) internal successors, (84142), 56773 states have internal predecessors, (84142), 5612 states have call successors, (5612), 1074 states have call predecessors, (5612), 1074 states have return successors, (5612), 5528 states have call predecessors, (5612), 5612 states have call successors, (5612) [2023-11-29 05:53:30,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63376 states to 63376 states and 95366 transitions. [2023-11-29 05:53:30,909 INFO L78 Accepts]: Start accepts. Automaton has 63376 states and 95366 transitions. Word has length 544 [2023-11-29 05:53:30,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:53:30,909 INFO L495 AbstractCegarLoop]: Abstraction has 63376 states and 95366 transitions. [2023-11-29 05:53:30,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.818181818181818) internal successors, (192), 31 states have internal predecessors, (192), 9 states have call successors, (80), 9 states have call predecessors, (80), 16 states have return successors, (80), 9 states have call predecessors, (80), 9 states have call successors, (80) [2023-11-29 05:53:30,910 INFO L276 IsEmpty]: Start isEmpty. Operand 63376 states and 95366 transitions. [2023-11-29 05:53:30,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2023-11-29 05:53:30,923 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:53:30,923 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:53:30,932 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 05:53:31,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 05:53:31,124 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:53:31,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:53:31,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1872584161, now seen corresponding path program 1 times [2023-11-29 05:53:31,125 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:53:31,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884645399] [2023-11-29 05:53:31,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:53:31,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:53:31,194 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:53:31,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1302280028] [2023-11-29 05:53:31,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:53:31,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:53:31,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:53:31,196 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:53:31,197 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 05:53:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:53:32,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 1310 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-29 05:53:32,211 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:53:48,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 9526 proven. 1071 refuted. 0 times theorem prover too weak. 2043 trivial. 0 not checked. [2023-11-29 05:53:48,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:54:39,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:54:39,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884645399] [2023-11-29 05:54:39,112 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:54:39,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302280028] [2023-11-29 05:54:39,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302280028] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:54:39,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:54:39,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2023-11-29 05:54:39,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808546411] [2023-11-29 05:54:39,113 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 05:54:39,114 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 05:54:39,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:54:39,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 05:54:39,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=430, Invalid=2875, Unknown=1, NotChecked=0, Total=3306 [2023-11-29 05:54:39,117 INFO L87 Difference]: Start difference. First operand 63376 states and 95366 transitions. Second operand has 44 states, 44 states have (on average 4.431818181818182) internal successors, (195), 41 states have internal predecessors, (195), 10 states have call successors, (80), 10 states have call predecessors, (80), 17 states have return successors, (80), 10 states have call predecessors, (80), 10 states have call successors, (80) [2023-11-29 05:55:06,903 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2023-11-29 05:55:23,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:55:23,196 INFO L93 Difference]: Finished difference Result 141804 states and 212315 transitions. [2023-11-29 05:55:23,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-29 05:55:23,196 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 4.431818181818182) internal successors, (195), 41 states have internal predecessors, (195), 10 states have call successors, (80), 10 states have call predecessors, (80), 17 states have return successors, (80), 10 states have call predecessors, (80), 10 states have call successors, (80) Word has length 544 [2023-11-29 05:55:23,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:55:23,375 INFO L225 Difference]: With dead ends: 141804 [2023-11-29 05:55:23,375 INFO L226 Difference]: Without dead ends: 83877 [2023-11-29 05:55:23,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 746 GetRequests, 630 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3737 ImplicationChecksByTransitivity, 37.2s TimeCoverageRelationStatistics Valid=2162, Invalid=11642, Unknown=2, NotChecked=0, Total=13806 [2023-11-29 05:55:23,406 INFO L413 NwaCegarLoop]: 577 mSDtfsCounter, 7459 mSDsluCounter, 8272 mSDsCounter, 0 mSdLazyCounter, 8108 mSolverCounterSat, 434 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7459 SdHoareTripleChecker+Valid, 8849 SdHoareTripleChecker+Invalid, 8542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 434 IncrementalHoareTripleChecker+Valid, 8108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.7s IncrementalHoareTripleChecker+Time [2023-11-29 05:55:23,407 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7459 Valid, 8849 Invalid, 8542 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [434 Valid, 8108 Invalid, 0 Unknown, 0 Unchecked, 21.7s Time] [2023-11-29 05:55:23,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83877 states. [2023-11-29 05:55:29,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83877 to 67270. [2023-11-29 05:55:29,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67270 states, 60541 states have (on average 1.483655704398672) internal successors, (89822), 60630 states have internal predecessors, (89822), 5647 states have call successors, (5647), 1081 states have call predecessors, (5647), 1081 states have return successors, (5647), 5558 states have call predecessors, (5647), 5647 states have call successors, (5647) [2023-11-29 05:55:29,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67270 states to 67270 states and 101116 transitions. [2023-11-29 05:55:29,187 INFO L78 Accepts]: Start accepts. Automaton has 67270 states and 101116 transitions. Word has length 544 [2023-11-29 05:55:29,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:55:29,187 INFO L495 AbstractCegarLoop]: Abstraction has 67270 states and 101116 transitions. [2023-11-29 05:55:29,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 4.431818181818182) internal successors, (195), 41 states have internal predecessors, (195), 10 states have call successors, (80), 10 states have call predecessors, (80), 17 states have return successors, (80), 10 states have call predecessors, (80), 10 states have call successors, (80) [2023-11-29 05:55:29,188 INFO L276 IsEmpty]: Start isEmpty. Operand 67270 states and 101116 transitions. [2023-11-29 05:55:29,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2023-11-29 05:55:29,202 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:55:29,202 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:55:29,210 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 05:55:29,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:55:29,403 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:55:29,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:55:29,404 INFO L85 PathProgramCache]: Analyzing trace with hash 2147343775, now seen corresponding path program 1 times [2023-11-29 05:55:29,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:55:29,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936189759] [2023-11-29 05:55:29,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:29,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:55:29,457 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:55:29,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [953824383] [2023-11-29 05:55:29,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:55:29,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:55:29,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:55:29,459 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:55:29,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 05:55:57,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:55:57,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 1308 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 05:55:57,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:56:03,287 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 7103 proven. 552 refuted. 0 times theorem prover too weak. 4985 trivial. 0 not checked. [2023-11-29 05:56:03,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:56:09,919 INFO L134 CoverageAnalysis]: Checked inductivity of 12640 backedges. 141 proven. 561 refuted. 0 times theorem prover too weak. 11938 trivial. 0 not checked. [2023-11-29 05:56:09,920 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:56:09,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936189759] [2023-11-29 05:56:09,920 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:56:09,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953824383] [2023-11-29 05:56:09,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [953824383] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:56:09,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:56:09,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2023-11-29 05:56:09,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560219774] [2023-11-29 05:56:09,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:56:09,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 05:56:09,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:56:09,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 05:56:09,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2023-11-29 05:56:09,924 INFO L87 Difference]: Start difference. First operand 67270 states and 101116 transitions. Second operand has 30 states, 30 states have (on average 9.133333333333333) internal successors, (274), 30 states have internal predecessors, (274), 7 states have call successors, (154), 4 states have call predecessors, (154), 10 states have return successors, (155), 7 states have call predecessors, (155), 7 states have call successors, (155) [2023-11-29 05:56:31,652 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.92s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:57:04,168 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:57:11,128 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:57:40,932 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:58:00,852 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:58:09,467 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:58:11,877 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 05:58:16,821 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [0] [2023-11-29 06:02:09,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:02:09,972 INFO L93 Difference]: Finished difference Result 352173 states and 515548 transitions. [2023-11-29 06:02:09,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2023-11-29 06:02:09,973 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 9.133333333333333) internal successors, (274), 30 states have internal predecessors, (274), 7 states have call successors, (154), 4 states have call predecessors, (154), 10 states have return successors, (155), 7 states have call predecessors, (155), 7 states have call successors, (155) Word has length 544 [2023-11-29 06:02:09,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:02:10,392 INFO L225 Difference]: With dead ends: 352173 [2023-11-29 06:02:10,392 INFO L226 Difference]: Without dead ends: 291957 [2023-11-29 06:02:10,610 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1240 GetRequests, 1083 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9222 ImplicationChecksByTransitivity, 109.6s TimeCoverageRelationStatistics Valid=5353, Invalid=19769, Unknown=0, NotChecked=0, Total=25122 [2023-11-29 06:02:10,611 INFO L413 NwaCegarLoop]: 970 mSDtfsCounter, 6438 mSDsluCounter, 8965 mSDsCounter, 0 mSdLazyCounter, 8018 mSolverCounterSat, 1256 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 216.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6463 SdHoareTripleChecker+Valid, 9935 SdHoareTripleChecker+Invalid, 9279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1256 IncrementalHoareTripleChecker+Valid, 8018 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 218.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:02:10,611 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6463 Valid, 9935 Invalid, 9279 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1256 Valid, 8018 Invalid, 5 Unknown, 0 Unchecked, 218.4s Time] [2023-11-29 06:02:10,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291957 states. [2023-11-29 06:02:27,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291957 to 149158. [2023-11-29 06:02:27,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149158 states, 135245 states have (on average 1.4854153573145032) internal successors, (200895), 135557 states have internal predecessors, (200895), 10880 states have call successors, (10880), 3032 states have call predecessors, (10880), 3032 states have return successors, (10880), 10568 states have call predecessors, (10880), 10880 states have call successors, (10880) [2023-11-29 06:02:28,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149158 states to 149158 states and 222655 transitions. [2023-11-29 06:02:28,077 INFO L78 Accepts]: Start accepts. Automaton has 149158 states and 222655 transitions. Word has length 544 [2023-11-29 06:02:28,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:02:28,078 INFO L495 AbstractCegarLoop]: Abstraction has 149158 states and 222655 transitions. [2023-11-29 06:02:28,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 9.133333333333333) internal successors, (274), 30 states have internal predecessors, (274), 7 states have call successors, (154), 4 states have call predecessors, (154), 10 states have return successors, (155), 7 states have call predecessors, (155), 7 states have call successors, (155) [2023-11-29 06:02:28,078 INFO L276 IsEmpty]: Start isEmpty. Operand 149158 states and 222655 transitions. [2023-11-29 06:02:28,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 545 [2023-11-29 06:02:28,102 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:02:28,103 INFO L195 NwaCegarLoop]: trace histogram [80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 06:02:28,116 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 06:02:28,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-11-29 06:02:28,303 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:02:28,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:02:28,304 INFO L85 PathProgramCache]: Analyzing trace with hash 268212829, now seen corresponding path program 1 times [2023-11-29 06:02:28,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:02:28,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389030597] [2023-11-29 06:02:28,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:28,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:02:28,362 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:02:28,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [624741206] [2023-11-29 06:02:28,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:02:28,363 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:02:28,363 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:02:28,364 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:02:28,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_57ca9f7f-970a-4acc-9c96-5e265d3f5e95/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process