./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-11.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/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_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-11.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/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_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/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 23501b270359c8bb66bf017123a6b997c736c6bad56bfcdab3d899e8f1555d26 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:02:26,238 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:02:26,312 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 05:02:26,316 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:02:26,317 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:02:26,349 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:02:26,350 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:02:26,351 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:02:26,351 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:02:26,352 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:02:26,353 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:02:26,353 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:02:26,354 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:02:26,355 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:02:26,355 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:02:26,356 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:02:26,357 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 05:02:26,357 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:02:26,358 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:02:26,358 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:02:26,359 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:02:26,360 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 05:02:26,360 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:02:26,361 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 05:02:26,361 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:02:26,362 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 05:02:26,362 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:02:26,363 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:02:26,363 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:02:26,364 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:02:26,364 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:02:26,365 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:02:26,365 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:02:26,365 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:02:26,371 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 05:02:26,372 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:02:26,372 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:02:26,372 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:02:26,372 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:02:26,373 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 05:02:26,373 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:02:26,373 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:02:26,373 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_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 23501b270359c8bb66bf017123a6b997c736c6bad56bfcdab3d899e8f1555d26 [2023-11-29 05:02:26,649 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:02:26,674 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:02:26,676 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:02:26,677 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:02:26,678 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:02:26,679 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-11.i [2023-11-29 05:02:29,805 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:02:30,101 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:02:30,102 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-11.i [2023-11-29 05:02:30,121 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/data/23db4270b/6205ac8b7c4840bbbaa2472e8ce82d17/FLAG9b03eb871 [2023-11-29 05:02:30,136 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/data/23db4270b/6205ac8b7c4840bbbaa2472e8ce82d17 [2023-11-29 05:02:30,139 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:02:30,141 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:02:30,142 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:02:30,142 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:02:30,147 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:02:30,148 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:02:30" (1/1) ... [2023-11-29 05:02:30,149 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b5875fb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:30, skipping insertion in model container [2023-11-29 05:02:30,149 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:02:30" (1/1) ... [2023-11-29 05:02:30,212 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:02:30,355 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_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-11.i[916,929] [2023-11-29 05:02:30,586 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:02:30,605 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:02:30,615 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_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-11.i[916,929] [2023-11-29 05:02:30,756 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:02:30,776 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:02:30,776 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:30 WrapperNode [2023-11-29 05:02:30,776 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:02:30,777 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:02:30,777 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:02:30,778 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:02:30,785 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:30" (1/1) ... [2023-11-29 05:02:30,817 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:30" (1/1) ... [2023-11-29 05:02:30,992 INFO L138 Inliner]: procedures = 26, calls = 82, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 779 [2023-11-29 05:02:30,992 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:02:30,993 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:02:30,993 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:02:30,993 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:02:31,002 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:30" (1/1) ... [2023-11-29 05:02:31,003 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:30" (1/1) ... [2023-11-29 05:02:31,020 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:30" (1/1) ... [2023-11-29 05:02:31,077 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 05:02:31,077 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:30" (1/1) ... [2023-11-29 05:02:31,077 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:30" (1/1) ... [2023-11-29 05:02:31,102 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:30" (1/1) ... [2023-11-29 05:02:31,110 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:30" (1/1) ... [2023-11-29 05:02:31,130 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:30" (1/1) ... [2023-11-29 05:02:31,137 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:30" (1/1) ... [2023-11-29 05:02:31,149 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:02:31,150 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:02:31,150 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:02:31,150 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:02:31,151 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:30" (1/1) ... [2023-11-29 05:02:31,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:02:31,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:31,175 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:02:31,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:02:31,209 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 05:02:31,209 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 05:02:31,209 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 05:02:31,210 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 05:02:31,210 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:02:31,210 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:02:31,348 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:02:31,350 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:02:32,584 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:02:32,655 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:02:32,656 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 05:02:32,656 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:02:32 BoogieIcfgContainer [2023-11-29 05:02:32,657 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:02:32,660 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:02:32,660 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:02:32,664 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:02:32,664 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:02:30" (1/3) ... [2023-11-29 05:02:32,665 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26766d5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:02:32, skipping insertion in model container [2023-11-29 05:02:32,665 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:02:30" (2/3) ... [2023-11-29 05:02:32,665 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26766d5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:02:32, skipping insertion in model container [2023-11-29 05:02:32,665 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:02:32" (3/3) ... [2023-11-29 05:02:32,667 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-11.i [2023-11-29 05:02:32,688 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:02:32,689 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 05:02:32,756 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:02:32,763 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;@10107b56, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:02:32,764 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 05:02:32,771 INFO L276 IsEmpty]: Start isEmpty. Operand has 293 states, 221 states have (on average 1.6018099547511313) internal successors, (354), 222 states have internal predecessors, (354), 69 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-29 05:02:32,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2023-11-29 05:02:32,809 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:02:32,811 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:32,811 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:02:32,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:32,818 INFO L85 PathProgramCache]: Analyzing trace with hash 601489319, now seen corresponding path program 1 times [2023-11-29 05:02:32,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:32,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263324153] [2023-11-29 05:02:32,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:32,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:33,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:33,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263324153] [2023-11-29 05:02:33,243 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 05:02:33,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246573313] [2023-11-29 05:02:33,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:33,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:33,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:33,246 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:33,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:02:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:33,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 1232 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 05:02:33,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:33,886 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 9248 trivial. 0 not checked. [2023-11-29 05:02:33,886 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:02:33,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246573313] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:02:33,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:02:33,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:02:33,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919469528] [2023-11-29 05:02:33,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:02:33,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 05:02:33,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:33,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 05:02:33,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 05:02:33,932 INFO L87 Difference]: Start difference. First operand has 293 states, 221 states have (on average 1.6018099547511313) internal successors, (354), 222 states have internal predecessors, (354), 69 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) Second operand has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 2 states have call successors, (69), 2 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 2 states have call successors, (69) [2023-11-29 05:02:34,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:02:34,019 INFO L93 Difference]: Finished difference Result 583 states and 1051 transitions. [2023-11-29 05:02:34,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 05:02:34,022 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 2 states have call successors, (69), 2 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 2 states have call successors, (69) Word has length 487 [2023-11-29 05:02:34,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:02:34,033 INFO L225 Difference]: With dead ends: 583 [2023-11-29 05:02:34,034 INFO L226 Difference]: Without dead ends: 291 [2023-11-29 05:02:34,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 486 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 05:02:34,044 INFO L413 NwaCegarLoop]: 483 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, 483 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 05:02:34,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 483 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:02:34,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2023-11-29 05:02:34,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 291. [2023-11-29 05:02:34,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 220 states have (on average 1.5818181818181818) internal successors, (348), 220 states have internal predecessors, (348), 69 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-29 05:02:34,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 486 transitions. [2023-11-29 05:02:34,125 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 486 transitions. Word has length 487 [2023-11-29 05:02:34,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:02:34,126 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 486 transitions. [2023-11-29 05:02:34,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 73.5) internal successors, (147), 2 states have internal predecessors, (147), 2 states have call successors, (69), 2 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 2 states have call successors, (69) [2023-11-29 05:02:34,127 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 486 transitions. [2023-11-29 05:02:34,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 488 [2023-11-29 05:02:34,141 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:02:34,141 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:34,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:02:34,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 05:02:34,343 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:02:34,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:34,344 INFO L85 PathProgramCache]: Analyzing trace with hash -1172646247, now seen corresponding path program 1 times [2023-11-29 05:02:34,344 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:34,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055332021] [2023-11-29 05:02:34,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:34,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:34,527 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:02:34,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1439488445] [2023-11-29 05:02:34,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:34,528 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:34,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:34,530 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:34,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:02:35,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:35,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 1232 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 05:02:35,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:35,132 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 05:02:35,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:02:35,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:35,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055332021] [2023-11-29 05:02:35,133 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:02:35,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439488445] [2023-11-29 05:02:35,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439488445] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:02:35,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:02:35,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:02:35,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982796300] [2023-11-29 05:02:35,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:02:35,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:02:35,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:35,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:02:35,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:02:35,139 INFO L87 Difference]: Start difference. First operand 291 states and 486 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:02:35,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:02:35,319 INFO L93 Difference]: Finished difference Result 697 states and 1169 transitions. [2023-11-29 05:02:35,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:02:35,320 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 487 [2023-11-29 05:02:35,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:02:35,327 INFO L225 Difference]: With dead ends: 697 [2023-11-29 05:02:35,327 INFO L226 Difference]: Without dead ends: 407 [2023-11-29 05:02:35,328 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 486 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:02:35,330 INFO L413 NwaCegarLoop]: 474 mSDtfsCounter, 168 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 1383 SdHoareTripleChecker+Invalid, 75 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:02:35,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [168 Valid, 1383 Invalid, 75 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:02:35,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2023-11-29 05:02:35,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 361. [2023-11-29 05:02:35,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 361 states, 290 states have (on average 1.6413793103448275) internal successors, (476), 290 states have internal predecessors, (476), 69 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-29 05:02:35,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 614 transitions. [2023-11-29 05:02:35,366 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 614 transitions. Word has length 487 [2023-11-29 05:02:35,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:02:35,369 INFO L495 AbstractCegarLoop]: Abstraction has 361 states and 614 transitions. [2023-11-29 05:02:35,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:02:35,389 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 614 transitions. [2023-11-29 05:02:35,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2023-11-29 05:02:35,394 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:02:35,394 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:35,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:02:35,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:35,595 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:02:35,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:35,596 INFO L85 PathProgramCache]: Analyzing trace with hash 93589544, now seen corresponding path program 1 times [2023-11-29 05:02:35,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:35,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083955531] [2023-11-29 05:02:35,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:35,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:35,680 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:02:35,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [175748589] [2023-11-29 05:02:35,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:35,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:35,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:35,682 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:35,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:02:36,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:36,098 INFO L262 TraceCheckSpWp]: Trace formula consists of 1233 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:02:36,106 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:36,191 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 05:02:36,191 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:02:36,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:36,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083955531] [2023-11-29 05:02:36,192 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:02:36,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175748589] [2023-11-29 05:02:36,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [175748589] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:02:36,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:02:36,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:02:36,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180484346] [2023-11-29 05:02:36,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:02:36,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:02:36,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:36,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:02:36,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:02:36,197 INFO L87 Difference]: Start difference. First operand 361 states and 614 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:02:36,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:02:36,272 INFO L93 Difference]: Finished difference Result 1080 states and 1838 transitions. [2023-11-29 05:02:36,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:02:36,273 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 488 [2023-11-29 05:02:36,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:02:36,281 INFO L225 Difference]: With dead ends: 1080 [2023-11-29 05:02:36,282 INFO L226 Difference]: Without dead ends: 720 [2023-11-29 05:02:36,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 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 05:02:36,285 INFO L413 NwaCegarLoop]: 482 mSDtfsCounter, 460 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 959 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:02:36,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 959 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:02:36,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2023-11-29 05:02:36,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 390. [2023-11-29 05:02:36,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 319 states have (on average 1.64576802507837) internal successors, (525), 319 states have internal predecessors, (525), 69 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 69 states have call predecessors, (69), 69 states have call successors, (69) [2023-11-29 05:02:36,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 663 transitions. [2023-11-29 05:02:36,326 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 663 transitions. Word has length 488 [2023-11-29 05:02:36,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:02:36,328 INFO L495 AbstractCegarLoop]: Abstraction has 390 states and 663 transitions. [2023-11-29 05:02:36,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:02:36,329 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 663 transitions. [2023-11-29 05:02:36,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2023-11-29 05:02:36,350 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:02:36,351 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:36,359 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:02:36,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:36,557 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:02:36,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:36,557 INFO L85 PathProgramCache]: Analyzing trace with hash 16688746, now seen corresponding path program 1 times [2023-11-29 05:02:36,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:36,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064225164] [2023-11-29 05:02:36,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:36,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:36,667 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:02:36,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1298553038] [2023-11-29 05:02:36,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:36,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:36,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:36,670 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:36,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:02:37,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:37,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 1232 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:02:37,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:37,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 05:02:37,272 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:02:37,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:37,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064225164] [2023-11-29 05:02:37,272 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:02:37,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298553038] [2023-11-29 05:02:37,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298553038] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:02:37,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:02:37,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:02:37,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137781955] [2023-11-29 05:02:37,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:02:37,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:02:37,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:37,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:02:37,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:02:37,276 INFO L87 Difference]: Start difference. First operand 390 states and 663 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:02:37,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:02:37,583 INFO L93 Difference]: Finished difference Result 1151 states and 1955 transitions. [2023-11-29 05:02:37,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:02:37,584 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 488 [2023-11-29 05:02:37,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:02:37,592 INFO L225 Difference]: With dead ends: 1151 [2023-11-29 05:02:37,592 INFO L226 Difference]: Without dead ends: 762 [2023-11-29 05:02:37,594 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 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 05:02:37,595 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 427 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 933 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:02:37,596 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 933 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:02:37,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2023-11-29 05:02:37,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 760. [2023-11-29 05:02:37,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 619 states have (on average 1.6219709208400646) internal successors, (1004), 619 states have internal predecessors, (1004), 138 states have call successors, (138), 2 states have call predecessors, (138), 2 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2023-11-29 05:02:37,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 1280 transitions. [2023-11-29 05:02:37,656 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 1280 transitions. Word has length 488 [2023-11-29 05:02:37,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:02:37,658 INFO L495 AbstractCegarLoop]: Abstraction has 760 states and 1280 transitions. [2023-11-29 05:02:37,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:02:37,658 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 1280 transitions. [2023-11-29 05:02:37,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 489 [2023-11-29 05:02:37,693 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:02:37,694 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:37,704 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:02:37,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:37,895 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:02:37,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:37,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1893751976, now seen corresponding path program 1 times [2023-11-29 05:02:37,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:37,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127773420] [2023-11-29 05:02:37,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:37,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:37,978 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:02:37,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [472096245] [2023-11-29 05:02:37,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:37,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:37,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:37,982 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:37,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:02:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:38,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 1233 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:02:38,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:38,612 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 05:02:38,613 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:02:38,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:38,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127773420] [2023-11-29 05:02:38,613 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:02:38,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472096245] [2023-11-29 05:02:38,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472096245] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:02:38,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:02:38,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:02:38,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75985302] [2023-11-29 05:02:38,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:02:38,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:02:38,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:38,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:02:38,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:02:38,618 INFO L87 Difference]: Start difference. First operand 760 states and 1280 transitions. Second operand has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:02:38,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:02:38,777 INFO L93 Difference]: Finished difference Result 1523 states and 2564 transitions. [2023-11-29 05:02:38,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:02:38,778 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 488 [2023-11-29 05:02:38,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:02:38,786 INFO L225 Difference]: With dead ends: 1523 [2023-11-29 05:02:38,786 INFO L226 Difference]: Without dead ends: 764 [2023-11-29 05:02:38,789 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 486 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 05:02:38,790 INFO L413 NwaCegarLoop]: 797 mSDtfsCounter, 405 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 405 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:02:38,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [405 Valid, 1259 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:02:38,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2023-11-29 05:02:38,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 762. [2023-11-29 05:02:38,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 621 states have (on average 1.603864734299517) internal successors, (996), 621 states have internal predecessors, (996), 138 states have call successors, (138), 2 states have call predecessors, (138), 2 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2023-11-29 05:02:38,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 1272 transitions. [2023-11-29 05:02:38,890 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 1272 transitions. Word has length 488 [2023-11-29 05:02:38,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:02:38,891 INFO L495 AbstractCegarLoop]: Abstraction has 762 states and 1272 transitions. [2023-11-29 05:02:38,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.666666666666664) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:02:38,892 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 1272 transitions. [2023-11-29 05:02:38,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2023-11-29 05:02:38,900 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:02:38,900 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:38,908 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:02:39,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:39,102 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:02:39,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:39,102 INFO L85 PathProgramCache]: Analyzing trace with hash 1861385044, now seen corresponding path program 1 times [2023-11-29 05:02:39,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:39,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671557405] [2023-11-29 05:02:39,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:39,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:39,221 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:02:39,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [153635795] [2023-11-29 05:02:39,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:39,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:39,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:39,223 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:39,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:02:39,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:39,733 INFO L262 TraceCheckSpWp]: Trace formula consists of 1233 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 05:02:39,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 05:02:39,875 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:02:39,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:39,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671557405] [2023-11-29 05:02:39,875 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:02:39,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153635795] [2023-11-29 05:02:39,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153635795] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:02:39,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:02:39,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:02:39,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345535548] [2023-11-29 05:02:39,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:02:39,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:02:39,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:39,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:02:39,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:02:39,878 INFO L87 Difference]: Start difference. First operand 762 states and 1272 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:02:40,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:02:40,081 INFO L93 Difference]: Finished difference Result 2280 states and 3806 transitions. [2023-11-29 05:02:40,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:02:40,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 489 [2023-11-29 05:02:40,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:02:40,094 INFO L225 Difference]: With dead ends: 2280 [2023-11-29 05:02:40,094 INFO L226 Difference]: Without dead ends: 1519 [2023-11-29 05:02:40,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 487 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 05:02:40,097 INFO L413 NwaCegarLoop]: 677 mSDtfsCounter, 415 mSDsluCounter, 470 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:02:40,098 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [415 Valid, 1147 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:02:40,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1519 states. [2023-11-29 05:02:40,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1519 to 1070. [2023-11-29 05:02:40,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1070 states, 929 states have (on average 1.6340150699677072) internal successors, (1518), 929 states have internal predecessors, (1518), 138 states have call successors, (138), 2 states have call predecessors, (138), 2 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2023-11-29 05:02:40,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1070 states to 1070 states and 1794 transitions. [2023-11-29 05:02:40,210 INFO L78 Accepts]: Start accepts. Automaton has 1070 states and 1794 transitions. Word has length 489 [2023-11-29 05:02:40,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:02:40,211 INFO L495 AbstractCegarLoop]: Abstraction has 1070 states and 1794 transitions. [2023-11-29 05:02:40,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:02:40,211 INFO L276 IsEmpty]: Start isEmpty. Operand 1070 states and 1794 transitions. [2023-11-29 05:02:40,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2023-11-29 05:02:40,215 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:02:40,215 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:40,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:02:40,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 05:02:40,416 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:02:40,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:40,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1788998486, now seen corresponding path program 1 times [2023-11-29 05:02:40,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:40,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083642371] [2023-11-29 05:02:40,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:40,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:40,488 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:02:40,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [134761717] [2023-11-29 05:02:40,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:40,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:40,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:40,490 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:40,511 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:02:40,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:40,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 1232 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 05:02:40,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:41,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 05:02:41,004 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:02:41,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:41,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083642371] [2023-11-29 05:02:41,004 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:02:41,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134761717] [2023-11-29 05:02:41,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134761717] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:02:41,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:02:41,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 05:02:41,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13782107] [2023-11-29 05:02:41,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:02:41,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:02:41,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:41,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:02:41,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:02:41,008 INFO L87 Difference]: Start difference. First operand 1070 states and 1794 transitions. Second operand has 6 states, 6 states have (on average 24.5) internal successors, (147), 6 states have internal predecessors, (147), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:02:42,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:02:42,001 INFO L93 Difference]: Finished difference Result 3120 states and 5240 transitions. [2023-11-29 05:02:42,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:02:42,002 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.5) internal successors, (147), 6 states have internal predecessors, (147), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 489 [2023-11-29 05:02:42,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:02:42,015 INFO L225 Difference]: With dead ends: 3120 [2023-11-29 05:02:42,015 INFO L226 Difference]: Without dead ends: 2051 [2023-11-29 05:02:42,017 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 489 GetRequests, 484 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:02:42,018 INFO L413 NwaCegarLoop]: 678 mSDtfsCounter, 569 mSDsluCounter, 1847 mSDsCounter, 0 mSdLazyCounter, 693 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 569 SdHoareTripleChecker+Valid, 2525 SdHoareTripleChecker+Invalid, 694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 05:02:42,019 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [569 Valid, 2525 Invalid, 694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 693 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 05:02:42,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2023-11-29 05:02:42,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1152. [2023-11-29 05:02:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1152 states, 1011 states have (on average 1.6340257171117705) internal successors, (1652), 1011 states have internal predecessors, (1652), 138 states have call successors, (138), 2 states have call predecessors, (138), 2 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2023-11-29 05:02:42,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1928 transitions. [2023-11-29 05:02:42,100 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1928 transitions. Word has length 489 [2023-11-29 05:02:42,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:02:42,101 INFO L495 AbstractCegarLoop]: Abstraction has 1152 states and 1928 transitions. [2023-11-29 05:02:42,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.5) internal successors, (147), 6 states have internal predecessors, (147), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:02:42,101 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1928 transitions. [2023-11-29 05:02:42,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2023-11-29 05:02:42,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:02:42,106 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:42,114 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 05:02:42,306 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 05:02:42,307 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:02:42,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:42,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1119183400, now seen corresponding path program 1 times [2023-11-29 05:02:42,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:42,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716329204] [2023-11-29 05:02:42,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:42,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:42,397 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:02:42,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1512762331] [2023-11-29 05:02:42,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:42,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:42,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:42,399 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:42,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:02:42,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:42,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 1232 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:02:42,829 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:43,346 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 600 proven. 198 refuted. 0 times theorem prover too weak. 8586 trivial. 0 not checked. [2023-11-29 05:02:43,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:02:43,711 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 6 proven. 198 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-29 05:02:43,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:43,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716329204] [2023-11-29 05:02:43,711 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:02:43,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512762331] [2023-11-29 05:02:43,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512762331] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:02:43,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:02:43,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 05:02:43,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588504685] [2023-11-29 05:02:43,712 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:02:43,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:02:43,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:43,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:02:43,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:02:43,715 INFO L87 Difference]: Start difference. First operand 1152 states and 1928 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) [2023-11-29 05:02:44,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:02:44,279 INFO L93 Difference]: Finished difference Result 2093 states and 3479 transitions. [2023-11-29 05:02:44,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:02:44,280 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) Word has length 489 [2023-11-29 05:02:44,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:02:44,286 INFO L225 Difference]: With dead ends: 2093 [2023-11-29 05:02:44,286 INFO L226 Difference]: Without dead ends: 942 [2023-11-29 05:02:44,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 981 GetRequests, 971 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 05:02:44,290 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 262 mSDsluCounter, 637 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:02:44,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [262 Valid, 1027 Invalid, 448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 05:02:44,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 942 states. [2023-11-29 05:02:44,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 942 to 868. [2023-11-29 05:02:44,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 725 states have (on average 1.5889655172413792) internal successors, (1152), 725 states have internal predecessors, (1152), 138 states have call successors, (138), 4 states have call predecessors, (138), 4 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2023-11-29 05:02:44,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 1428 transitions. [2023-11-29 05:02:44,366 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 1428 transitions. Word has length 489 [2023-11-29 05:02:44,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:02:44,367 INFO L495 AbstractCegarLoop]: Abstraction has 868 states and 1428 transitions. [2023-11-29 05:02:44,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 2 states have call successors, (135), 2 states have call predecessors, (135), 4 states have return successors, (136), 2 states have call predecessors, (136), 2 states have call successors, (136) [2023-11-29 05:02:44,368 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 1428 transitions. [2023-11-29 05:02:44,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2023-11-29 05:02:44,371 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:02:44,372 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:44,380 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:02:44,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:44,573 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:02:44,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:44,574 INFO L85 PathProgramCache]: Analyzing trace with hash 824644758, now seen corresponding path program 1 times [2023-11-29 05:02:44,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:44,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000400457] [2023-11-29 05:02:44,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:44,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:44,689 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:02:44,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [958346024] [2023-11-29 05:02:44,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:44,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:44,690 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:44,693 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:44,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:02:45,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:45,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 1233 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:02:45,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:45,370 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 4208 proven. 66 refuted. 0 times theorem prover too weak. 5110 trivial. 0 not checked. [2023-11-29 05:02:45,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:02:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 138 proven. 66 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-29 05:02:45,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:45,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000400457] [2023-11-29 05:02:45,707 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:02:45,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958346024] [2023-11-29 05:02:45,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958346024] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:02:45,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:02:45,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 05:02:45,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909669782] [2023-11-29 05:02:45,708 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:02:45,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:02:45,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:45,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:02:45,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:02:45,711 INFO L87 Difference]: Start difference. First operand 868 states and 1428 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) [2023-11-29 05:02:46,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:02:46,242 INFO L93 Difference]: Finished difference Result 1749 states and 2865 transitions. [2023-11-29 05:02:46,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:02:46,244 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) Word has length 490 [2023-11-29 05:02:46,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:02:46,252 INFO L225 Difference]: With dead ends: 1749 [2023-11-29 05:02:46,252 INFO L226 Difference]: Without dead ends: 882 [2023-11-29 05:02:46,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 982 GetRequests, 972 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 05:02:46,255 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 652 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 697 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:02:46,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [697 Valid, 1050 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:02:46,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2023-11-29 05:02:46,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 874. [2023-11-29 05:02:46,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 874 states, 729 states have (on average 1.5582990397805212) internal successors, (1136), 729 states have internal predecessors, (1136), 138 states have call successors, (138), 6 states have call predecessors, (138), 6 states have return successors, (138), 138 states have call predecessors, (138), 138 states have call successors, (138) [2023-11-29 05:02:46,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 1412 transitions. [2023-11-29 05:02:46,365 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 1412 transitions. Word has length 490 [2023-11-29 05:02:46,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:02:46,366 INFO L495 AbstractCegarLoop]: Abstraction has 874 states and 1412 transitions. [2023-11-29 05:02:46,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (91), 2 states have call predecessors, (91), 4 states have return successors, (92), 2 states have call predecessors, (92), 2 states have call successors, (92) [2023-11-29 05:02:46,367 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 1412 transitions. [2023-11-29 05:02:46,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2023-11-29 05:02:46,372 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:02:46,372 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:46,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 05:02:46,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2023-11-29 05:02:46,573 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:02:46,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:46,574 INFO L85 PathProgramCache]: Analyzing trace with hash 521175954, now seen corresponding path program 1 times [2023-11-29 05:02:46,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:46,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833892201] [2023-11-29 05:02:46,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:46,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:46,654 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:02:46,654 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1380227722] [2023-11-29 05:02:46,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:46,655 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:46,655 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:46,656 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:46,658 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:02:47,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:47,122 INFO L262 TraceCheckSpWp]: Trace formula consists of 1233 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:02:47,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:47,196 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 05:02:47,196 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:02:47,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:47,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833892201] [2023-11-29 05:02:47,197 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:02:47,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380227722] [2023-11-29 05:02:47,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380227722] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:02:47,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:02:47,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:02:47,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440699530] [2023-11-29 05:02:47,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:02:47,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:02:47,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:47,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:02:47,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:02:47,200 INFO L87 Difference]: Start difference. First operand 874 states and 1412 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:02:47,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:02:47,684 INFO L93 Difference]: Finished difference Result 2447 states and 3925 transitions. [2023-11-29 05:02:47,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:02:47,685 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 490 [2023-11-29 05:02:47,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:02:47,696 INFO L225 Difference]: With dead ends: 2447 [2023-11-29 05:02:47,697 INFO L226 Difference]: Without dead ends: 1525 [2023-11-29 05:02:47,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:02:47,700 INFO L413 NwaCegarLoop]: 913 mSDtfsCounter, 699 mSDsluCounter, 952 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 699 SdHoareTripleChecker+Valid, 1865 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:02:47,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [699 Valid, 1865 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:02:47,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2023-11-29 05:02:47,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1240. [2023-11-29 05:02:47,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1240 states, 1001 states have (on average 1.5344655344655345) internal successors, (1536), 1003 states have internal predecessors, (1536), 228 states have call successors, (228), 10 states have call predecessors, (228), 10 states have return successors, (228), 226 states have call predecessors, (228), 228 states have call successors, (228) [2023-11-29 05:02:47,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1240 states to 1240 states and 1992 transitions. [2023-11-29 05:02:47,806 INFO L78 Accepts]: Start accepts. Automaton has 1240 states and 1992 transitions. Word has length 490 [2023-11-29 05:02:47,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:02:47,807 INFO L495 AbstractCegarLoop]: Abstraction has 1240 states and 1992 transitions. [2023-11-29 05:02:47,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:02:47,808 INFO L276 IsEmpty]: Start isEmpty. Operand 1240 states and 1992 transitions. [2023-11-29 05:02:47,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2023-11-29 05:02:47,812 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:02:47,812 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:47,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 05:02:48,013 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 05:02:48,013 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:02:48,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:48,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1535183278, now seen corresponding path program 1 times [2023-11-29 05:02:48,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:48,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865857061] [2023-11-29 05:02:48,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:48,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:48,093 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:02:48,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [509070115] [2023-11-29 05:02:48,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:48,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:48,093 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:48,094 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:48,096 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 05:02:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:48,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 1235 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:02:48,607 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:48,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 4758 proven. 99 refuted. 0 times theorem prover too weak. 4527 trivial. 0 not checked. [2023-11-29 05:02:48,927 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:02:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 105 proven. 99 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-29 05:02:49,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:49,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865857061] [2023-11-29 05:02:49,224 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:02:49,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509070115] [2023-11-29 05:02:49,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509070115] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:02:49,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:02:49,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 05:02:49,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554475283] [2023-11-29 05:02:49,225 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:02:49,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:02:49,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:49,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:02:49,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:02:49,227 INFO L87 Difference]: Start difference. First operand 1240 states and 1992 transitions. Second operand has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (102), 2 states have call predecessors, (102), 4 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) [2023-11-29 05:02:49,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:02:49,678 INFO L93 Difference]: Finished difference Result 2515 states and 4015 transitions. [2023-11-29 05:02:49,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:02:49,679 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (102), 2 states have call predecessors, (102), 4 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) Word has length 490 [2023-11-29 05:02:49,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:02:49,690 INFO L225 Difference]: With dead ends: 2515 [2023-11-29 05:02:49,690 INFO L226 Difference]: Without dead ends: 1276 [2023-11-29 05:02:49,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 982 GetRequests, 972 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:02:49,694 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 618 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 652 SdHoareTripleChecker+Valid, 1038 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:02:49,694 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [652 Valid, 1038 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:02:49,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2023-11-29 05:02:49,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 1256. [2023-11-29 05:02:49,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1256 states, 1013 states have (on average 1.5162882527147088) internal successors, (1536), 1015 states have internal predecessors, (1536), 228 states have call successors, (228), 14 states have call predecessors, (228), 14 states have return successors, (228), 226 states have call predecessors, (228), 228 states have call successors, (228) [2023-11-29 05:02:49,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1256 states to 1256 states and 1992 transitions. [2023-11-29 05:02:49,837 INFO L78 Accepts]: Start accepts. Automaton has 1256 states and 1992 transitions. Word has length 490 [2023-11-29 05:02:49,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:02:49,838 INFO L495 AbstractCegarLoop]: Abstraction has 1256 states and 1992 transitions. [2023-11-29 05:02:49,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.428571428571427) internal successors, (157), 7 states have internal predecessors, (157), 2 states have call successors, (102), 2 states have call predecessors, (102), 4 states have return successors, (103), 2 states have call predecessors, (103), 2 states have call successors, (103) [2023-11-29 05:02:49,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1256 states and 1992 transitions. [2023-11-29 05:02:49,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2023-11-29 05:02:49,845 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:02:49,846 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:49,856 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 05:02:50,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:50,047 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:02:50,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:50,047 INFO L85 PathProgramCache]: Analyzing trace with hash -214946158, now seen corresponding path program 1 times [2023-11-29 05:02:50,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:50,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960076412] [2023-11-29 05:02:50,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:50,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:50,143 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:02:50,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [980705530] [2023-11-29 05:02:50,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:50,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:50,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:50,145 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:50,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 05:02:50,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:50,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 1237 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:02:50,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:50,681 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 05:02:50,681 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:02:50,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:50,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960076412] [2023-11-29 05:02:50,682 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:02:50,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980705530] [2023-11-29 05:02:50,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980705530] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:02:50,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:02:50,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:02:50,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698056678] [2023-11-29 05:02:50,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:02:50,684 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:02:50,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:50,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:02:50,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:02:50,685 INFO L87 Difference]: Start difference. First operand 1256 states and 1992 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:02:51,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:02:51,134 INFO L93 Difference]: Finished difference Result 3340 states and 5287 transitions. [2023-11-29 05:02:51,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:02:51,135 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 490 [2023-11-29 05:02:51,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:02:51,153 INFO L225 Difference]: With dead ends: 3340 [2023-11-29 05:02:51,153 INFO L226 Difference]: Without dead ends: 2028 [2023-11-29 05:02:51,156 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:02:51,157 INFO L413 NwaCegarLoop]: 658 mSDtfsCounter, 576 mSDsluCounter, 840 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 1498 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:02:51,158 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 1498 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:02:51,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2028 states. [2023-11-29 05:02:51,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2028 to 1757. [2023-11-29 05:02:51,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1757 states, 1442 states have (on average 1.5242718446601942) internal successors, (2198), 1446 states have internal predecessors, (2198), 296 states have call successors, (296), 18 states have call predecessors, (296), 18 states have return successors, (296), 292 states have call predecessors, (296), 296 states have call successors, (296) [2023-11-29 05:02:51,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1757 states to 1757 states and 2790 transitions. [2023-11-29 05:02:51,375 INFO L78 Accepts]: Start accepts. Automaton has 1757 states and 2790 transitions. Word has length 490 [2023-11-29 05:02:51,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:02:51,375 INFO L495 AbstractCegarLoop]: Abstraction has 1757 states and 2790 transitions. [2023-11-29 05:02:51,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 4 states have internal predecessors, (148), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:02:51,376 INFO L276 IsEmpty]: Start isEmpty. Operand 1757 states and 2790 transitions. [2023-11-29 05:02:51,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 491 [2023-11-29 05:02:51,383 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:02:51,384 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:51,394 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 05:02:51,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:51,585 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:02:51,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:51,585 INFO L85 PathProgramCache]: Analyzing trace with hash 857068430, now seen corresponding path program 1 times [2023-11-29 05:02:51,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:51,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151158160] [2023-11-29 05:02:51,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:51,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:51,661 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:02:51,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675197510] [2023-11-29 05:02:51,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:51,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:51,662 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:51,663 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:51,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 05:02:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:52,269 INFO L262 TraceCheckSpWp]: Trace formula consists of 1237 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 05:02:52,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 2780 proven. 168 refuted. 0 times theorem prover too weak. 6436 trivial. 0 not checked. [2023-11-29 05:02:52,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:02:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 36 proven. 168 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-29 05:02:53,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:53,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151158160] [2023-11-29 05:02:53,260 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:02:53,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675197510] [2023-11-29 05:02:53,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675197510] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:02:53,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:02:53,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 05:02:53,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140198584] [2023-11-29 05:02:53,261 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:02:53,262 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 05:02:53,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:53,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 05:02:53,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:02:53,265 INFO L87 Difference]: Start difference. First operand 1757 states and 2790 transitions. Second operand has 12 states, 12 states have (on average 20.333333333333332) internal successors, (244), 12 states have internal predecessors, (244), 3 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 3 states have call predecessors, (126), 3 states have call successors, (126) [2023-11-29 05:02:56,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:02:56,620 INFO L93 Difference]: Finished difference Result 9284 states and 14553 transitions. [2023-11-29 05:02:56,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-29 05:02:56,621 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 20.333333333333332) internal successors, (244), 12 states have internal predecessors, (244), 3 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 3 states have call predecessors, (126), 3 states have call successors, (126) Word has length 490 [2023-11-29 05:02:56,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:02:56,661 INFO L225 Difference]: With dead ends: 9284 [2023-11-29 05:02:56,661 INFO L226 Difference]: Without dead ends: 7528 [2023-11-29 05:02:56,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1019 GetRequests, 973 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=1726, Unknown=0, NotChecked=0, Total=2256 [2023-11-29 05:02:56,667 INFO L413 NwaCegarLoop]: 645 mSDtfsCounter, 2461 mSDsluCounter, 3403 mSDsCounter, 0 mSdLazyCounter, 1941 mSolverCounterSat, 491 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2475 SdHoareTripleChecker+Valid, 4048 SdHoareTripleChecker+Invalid, 2432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 491 IncrementalHoareTripleChecker+Valid, 1941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:02:56,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2475 Valid, 4048 Invalid, 2432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [491 Valid, 1941 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-29 05:02:56,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7528 states. [2023-11-29 05:02:57,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7528 to 5488. [2023-11-29 05:02:57,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5488 states, 4739 states have (on average 1.5404093690652036) internal successors, (7300), 4755 states have internal predecessors, (7300), 676 states have call successors, (676), 72 states have call predecessors, (676), 72 states have return successors, (676), 660 states have call predecessors, (676), 676 states have call successors, (676) [2023-11-29 05:02:57,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5488 states to 5488 states and 8652 transitions. [2023-11-29 05:02:57,241 INFO L78 Accepts]: Start accepts. Automaton has 5488 states and 8652 transitions. Word has length 490 [2023-11-29 05:02:57,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:02:57,242 INFO L495 AbstractCegarLoop]: Abstraction has 5488 states and 8652 transitions. [2023-11-29 05:02:57,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 20.333333333333332) internal successors, (244), 12 states have internal predecessors, (244), 3 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 3 states have call predecessors, (126), 3 states have call successors, (126) [2023-11-29 05:02:57,243 INFO L276 IsEmpty]: Start isEmpty. Operand 5488 states and 8652 transitions. [2023-11-29 05:02:57,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2023-11-29 05:02:57,258 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:02:57,259 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:02:57,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 05:02:57,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:57,460 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:02:57,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:02:57,460 INFO L85 PathProgramCache]: Analyzing trace with hash -963783794, now seen corresponding path program 1 times [2023-11-29 05:02:57,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:02:57,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850741459] [2023-11-29 05:02:57,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:57,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:02:57,539 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:02:57,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1560697042] [2023-11-29 05:02:57,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:02:57,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:02:57,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:02:57,542 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:02:57,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 05:02:58,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:02:58,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 05:02:58,083 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:02:59,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 05:02:59,953 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:02:59,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:02:59,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850741459] [2023-11-29 05:02:59,953 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:02:59,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560697042] [2023-11-29 05:02:59,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560697042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:02:59,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:02:59,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:02:59,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366143080] [2023-11-29 05:02:59,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:02:59,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:02:59,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:02:59,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:02:59,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:02:59,958 INFO L87 Difference]: Start difference. First operand 5488 states and 8652 transitions. Second operand has 5 states, 5 states have (on average 29.8) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:03:00,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:03:00,808 INFO L93 Difference]: Finished difference Result 15171 states and 24075 transitions. [2023-11-29 05:03:00,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:03:00,810 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 491 [2023-11-29 05:03:00,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:03:00,842 INFO L225 Difference]: With dead ends: 15171 [2023-11-29 05:03:00,843 INFO L226 Difference]: Without dead ends: 9684 [2023-11-29 05:03:00,850 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:03:00,850 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 379 mSDsluCounter, 1331 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 379 SdHoareTripleChecker+Valid, 1790 SdHoareTripleChecker+Invalid, 255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:03:00,851 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [379 Valid, 1790 Invalid, 255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 05:03:00,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9684 states. [2023-11-29 05:03:01,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9684 to 9403. [2023-11-29 05:03:01,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9403 states, 8578 states have (on average 1.5778736302168337) internal successors, (13535), 8594 states have internal predecessors, (13535), 745 states have call successors, (745), 79 states have call predecessors, (745), 79 states have return successors, (745), 729 states have call predecessors, (745), 745 states have call successors, (745) [2023-11-29 05:03:01,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9403 states to 9403 states and 15025 transitions. [2023-11-29 05:03:01,282 INFO L78 Accepts]: Start accepts. Automaton has 9403 states and 15025 transitions. Word has length 491 [2023-11-29 05:03:01,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:03:01,282 INFO L495 AbstractCegarLoop]: Abstraction has 9403 states and 15025 transitions. [2023-11-29 05:03:01,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.8) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:03:01,282 INFO L276 IsEmpty]: Start isEmpty. Operand 9403 states and 15025 transitions. [2023-11-29 05:03:01,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2023-11-29 05:03:01,291 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:03:01,291 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:03:01,300 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 05:03:01,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 05:03:01,492 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:03:01,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:01,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1958477492, now seen corresponding path program 1 times [2023-11-29 05:03:01,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:01,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537996256] [2023-11-29 05:03:01,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:01,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:01,570 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:03:01,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [988421529] [2023-11-29 05:03:01,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:01,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:01,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:01,572 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:01,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 05:03:02,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:02,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:03:02,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:02,202 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 05:03:02,202 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:03:02,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:02,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537996256] [2023-11-29 05:03:02,202 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:03:02,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988421529] [2023-11-29 05:03:02,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988421529] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:03:02,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:03:02,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:03:02,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204387000] [2023-11-29 05:03:02,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:03:02,204 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:03:02,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:02,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:03:02,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:03:02,206 INFO L87 Difference]: Start difference. First operand 9403 states and 15025 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:03:03,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:03:03,559 INFO L93 Difference]: Finished difference Result 35014 states and 55815 transitions. [2023-11-29 05:03:03,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:03:03,560 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 491 [2023-11-29 05:03:03,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:03:03,617 INFO L225 Difference]: With dead ends: 35014 [2023-11-29 05:03:03,617 INFO L226 Difference]: Without dead ends: 27069 [2023-11-29 05:03:03,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 489 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 05:03:03,633 INFO L413 NwaCegarLoop]: 563 mSDtfsCounter, 925 mSDsluCounter, 1168 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 1731 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:03:03,634 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [925 Valid, 1731 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 05:03:03,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27069 states. [2023-11-29 05:03:04,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27069 to 17910. [2023-11-29 05:03:04,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17910 states, 16664 states have (on average 1.585213634181469) internal successors, (26416), 16698 states have internal predecessors, (26416), 1105 states have call successors, (1105), 140 states have call predecessors, (1105), 140 states have return successors, (1105), 1071 states have call predecessors, (1105), 1105 states have call successors, (1105) [2023-11-29 05:03:04,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17910 states to 17910 states and 28626 transitions. [2023-11-29 05:03:04,503 INFO L78 Accepts]: Start accepts. Automaton has 17910 states and 28626 transitions. Word has length 491 [2023-11-29 05:03:04,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:03:04,504 INFO L495 AbstractCegarLoop]: Abstraction has 17910 states and 28626 transitions. [2023-11-29 05:03:04,504 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:03:04,505 INFO L276 IsEmpty]: Start isEmpty. Operand 17910 states and 28626 transitions. [2023-11-29 05:03:04,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2023-11-29 05:03:04,518 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:03:04,519 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:03:04,529 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 05:03:04,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 05:03:04,720 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:03:04,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:04,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1855409546, now seen corresponding path program 1 times [2023-11-29 05:03:04,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:04,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299114154] [2023-11-29 05:03:04,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:04,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:04,788 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:03:04,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1495772849] [2023-11-29 05:03:04,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:04,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:04,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:04,790 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:04,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 05:03:05,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:05,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 1239 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:03:05,288 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:05,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 05:03:05,383 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:03:05,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:05,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299114154] [2023-11-29 05:03:05,383 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:03:05,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495772849] [2023-11-29 05:03:05,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495772849] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:03:05,384 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:03:05,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:03:05,384 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325912146] [2023-11-29 05:03:05,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:03:05,385 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:03:05,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:05,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:03:05,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:03:05,387 INFO L87 Difference]: Start difference. First operand 17910 states and 28626 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:03:06,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:03:06,278 INFO L93 Difference]: Finished difference Result 38360 states and 61253 transitions. [2023-11-29 05:03:06,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:03:06,279 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 491 [2023-11-29 05:03:06,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:03:06,324 INFO L225 Difference]: With dead ends: 38360 [2023-11-29 05:03:06,325 INFO L226 Difference]: Without dead ends: 24468 [2023-11-29 05:03:06,344 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 491 GetRequests, 488 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 05:03:06,344 INFO L413 NwaCegarLoop]: 647 mSDtfsCounter, 570 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 1448 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:03:06,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [570 Valid, 1448 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:03:06,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24468 states. [2023-11-29 05:03:07,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24468 to 13669. [2023-11-29 05:03:07,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13669 states, 13001 states have (on average 1.583878163218214) internal successors, (20592), 13017 states have internal predecessors, (20592), 587 states have call successors, (587), 80 states have call predecessors, (587), 80 states have return successors, (587), 571 states have call predecessors, (587), 587 states have call successors, (587) [2023-11-29 05:03:07,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13669 states to 13669 states and 21766 transitions. [2023-11-29 05:03:07,155 INFO L78 Accepts]: Start accepts. Automaton has 13669 states and 21766 transitions. Word has length 491 [2023-11-29 05:03:07,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:03:07,156 INFO L495 AbstractCegarLoop]: Abstraction has 13669 states and 21766 transitions. [2023-11-29 05:03:07,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 4 states have internal predecessors, (149), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:03:07,156 INFO L276 IsEmpty]: Start isEmpty. Operand 13669 states and 21766 transitions. [2023-11-29 05:03:07,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2023-11-29 05:03:07,174 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:03:07,174 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:03:07,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-29 05:03:07,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:07,375 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:03:07,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:07,376 INFO L85 PathProgramCache]: Analyzing trace with hash -684625958, now seen corresponding path program 1 times [2023-11-29 05:03:07,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:07,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736612821] [2023-11-29 05:03:07,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:07,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:07,445 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:03:07,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [247520362] [2023-11-29 05:03:07,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:07,446 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:07,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:07,447 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:07,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 05:03:07,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:07,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 1239 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 05:03:07,960 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:08,051 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 05:03:08,051 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:03:08,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:08,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736612821] [2023-11-29 05:03:08,051 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:03:08,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247520362] [2023-11-29 05:03:08,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247520362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:03:08,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:03:08,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:03:08,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602766658] [2023-11-29 05:03:08,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:03:08,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:03:08,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:08,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:03:08,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:03:08,054 INFO L87 Difference]: Start difference. First operand 13669 states and 21766 transitions. Second operand has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:03:09,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:03:09,183 INFO L93 Difference]: Finished difference Result 29569 states and 47228 transitions. [2023-11-29 05:03:09,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:03:09,184 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 492 [2023-11-29 05:03:09,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:03:09,221 INFO L225 Difference]: With dead ends: 29569 [2023-11-29 05:03:09,222 INFO L226 Difference]: Without dead ends: 20044 [2023-11-29 05:03:09,236 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 490 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 05:03:09,237 INFO L413 NwaCegarLoop]: 700 mSDtfsCounter, 937 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 937 SdHoareTripleChecker+Valid, 1745 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:03:09,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [937 Valid, 1745 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:03:09,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20044 states. [2023-11-29 05:03:09,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20044 to 13165. [2023-11-29 05:03:09,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13165 states, 12497 states have (on average 1.587901096263103) internal successors, (19844), 12513 states have internal predecessors, (19844), 587 states have call successors, (587), 80 states have call predecessors, (587), 80 states have return successors, (587), 571 states have call predecessors, (587), 587 states have call successors, (587) [2023-11-29 05:03:09,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13165 states to 13165 states and 21018 transitions. [2023-11-29 05:03:09,895 INFO L78 Accepts]: Start accepts. Automaton has 13165 states and 21018 transitions. Word has length 492 [2023-11-29 05:03:09,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:03:09,895 INFO L495 AbstractCegarLoop]: Abstraction has 13165 states and 21018 transitions. [2023-11-29 05:03:09,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.5) internal successors, (150), 4 states have internal predecessors, (150), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:03:09,896 INFO L276 IsEmpty]: Start isEmpty. Operand 13165 states and 21018 transitions. [2023-11-29 05:03:09,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2023-11-29 05:03:09,907 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:03:09,907 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:03:09,916 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 05:03:10,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 05:03:10,108 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:03:10,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:10,108 INFO L85 PathProgramCache]: Analyzing trace with hash -854134314, now seen corresponding path program 1 times [2023-11-29 05:03:10,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:10,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134753249] [2023-11-29 05:03:10,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:10,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:10,171 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:03:10,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1665505814] [2023-11-29 05:03:10,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:10,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:10,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:10,173 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:10,175 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 05:03:10,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:10,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 1241 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:03:10,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:10,852 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 05:03:10,852 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:03:10,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:10,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134753249] [2023-11-29 05:03:10,852 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:03:10,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665505814] [2023-11-29 05:03:10,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665505814] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:03:10,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:03:10,853 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 05:03:10,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445755531] [2023-11-29 05:03:10,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:03:10,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:03:10,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:10,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:03:10,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:03:10,855 INFO L87 Difference]: Start difference. First operand 13165 states and 21018 transitions. Second operand has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:03:11,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:03:11,994 INFO L93 Difference]: Finished difference Result 31211 states and 50008 transitions. [2023-11-29 05:03:11,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:03:11,994 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 492 [2023-11-29 05:03:11,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:03:12,020 INFO L225 Difference]: With dead ends: 31211 [2023-11-29 05:03:12,020 INFO L226 Difference]: Without dead ends: 20832 [2023-11-29 05:03:12,029 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:03:12,030 INFO L413 NwaCegarLoop]: 693 mSDtfsCounter, 898 mSDsluCounter, 1097 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 898 SdHoareTripleChecker+Valid, 1790 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:03:12,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [898 Valid, 1790 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 05:03:12,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20832 states. [2023-11-29 05:03:12,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20832 to 14435. [2023-11-29 05:03:12,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14435 states, 13767 states have (on average 1.5878550156170552) internal successors, (21860), 13783 states have internal predecessors, (21860), 587 states have call successors, (587), 80 states have call predecessors, (587), 80 states have return successors, (587), 571 states have call predecessors, (587), 587 states have call successors, (587) [2023-11-29 05:03:12,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14435 states to 14435 states and 23034 transitions. [2023-11-29 05:03:12,706 INFO L78 Accepts]: Start accepts. Automaton has 14435 states and 23034 transitions. Word has length 492 [2023-11-29 05:03:12,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:03:12,707 INFO L495 AbstractCegarLoop]: Abstraction has 14435 states and 23034 transitions. [2023-11-29 05:03:12,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:03:12,708 INFO L276 IsEmpty]: Start isEmpty. Operand 14435 states and 23034 transitions. [2023-11-29 05:03:12,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 493 [2023-11-29 05:03:12,725 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:03:12,725 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:03:12,734 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 05:03:12,926 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 05:03:12,926 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:03:12,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:12,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1054323476, now seen corresponding path program 1 times [2023-11-29 05:03:12,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:12,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134318985] [2023-11-29 05:03:12,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:12,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:13,010 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:03:13,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [448639833] [2023-11-29 05:03:13,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:13,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:13,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:13,012 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:13,014 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 05:03:13,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:13,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 1244 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:03:13,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:14,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 4254 proven. 135 refuted. 0 times theorem prover too weak. 4995 trivial. 0 not checked. [2023-11-29 05:03:14,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:03:14,449 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 69 proven. 135 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-29 05:03:14,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:14,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134318985] [2023-11-29 05:03:14,449 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:03:14,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448639833] [2023-11-29 05:03:14,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448639833] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:03:14,449 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:03:14,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 05:03:14,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185726065] [2023-11-29 05:03:14,450 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:03:14,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:03:14,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:14,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:03:14,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:03:14,454 INFO L87 Difference]: Start difference. First operand 14435 states and 23034 transitions. Second operand has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) [2023-11-29 05:03:15,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:03:15,641 INFO L93 Difference]: Finished difference Result 22629 states and 35958 transitions. [2023-11-29 05:03:15,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:03:15,642 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) Word has length 492 [2023-11-29 05:03:15,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:03:15,657 INFO L225 Difference]: With dead ends: 22629 [2023-11-29 05:03:15,657 INFO L226 Difference]: Without dead ends: 11231 [2023-11-29 05:03:15,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 986 GetRequests, 976 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:03:15,667 INFO L413 NwaCegarLoop]: 423 mSDtfsCounter, 522 mSDsluCounter, 684 mSDsCounter, 0 mSdLazyCounter, 607 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 1107 SdHoareTripleChecker+Invalid, 658 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:03:15,667 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 1107 Invalid, 658 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 607 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 05:03:15,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11231 states. [2023-11-29 05:03:16,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11231 to 9177. [2023-11-29 05:03:16,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9177 states, 8502 states have (on average 1.555281110326982) internal successors, (13223), 8518 states have internal predecessors, (13223), 587 states have call successors, (587), 87 states have call predecessors, (587), 87 states have return successors, (587), 571 states have call predecessors, (587), 587 states have call successors, (587) [2023-11-29 05:03:16,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9177 states to 9177 states and 14397 transitions. [2023-11-29 05:03:16,097 INFO L78 Accepts]: Start accepts. Automaton has 9177 states and 14397 transitions. Word has length 492 [2023-11-29 05:03:16,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:03:16,098 INFO L495 AbstractCegarLoop]: Abstraction has 9177 states and 14397 transitions. [2023-11-29 05:03:16,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.714285714285715) internal successors, (159), 7 states have internal predecessors, (159), 2 states have call successors, (114), 2 states have call predecessors, (114), 4 states have return successors, (115), 2 states have call predecessors, (115), 2 states have call successors, (115) [2023-11-29 05:03:16,098 INFO L276 IsEmpty]: Start isEmpty. Operand 9177 states and 14397 transitions. [2023-11-29 05:03:16,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 494 [2023-11-29 05:03:16,104 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:03:16,105 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:03:16,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 05:03:16,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:16,305 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:03:16,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:16,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1922566911, now seen corresponding path program 1 times [2023-11-29 05:03:16,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:16,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999855138] [2023-11-29 05:03:16,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:16,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:16,351 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:03:16,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [165628038] [2023-11-29 05:03:16,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:16,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:16,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:16,353 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:16,355 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 05:03:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:16,872 INFO L262 TraceCheckSpWp]: Trace formula consists of 1240 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 05:03:16,880 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:18,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 05:03:18,220 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:03:18,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:18,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999855138] [2023-11-29 05:03:18,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:03:18,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165628038] [2023-11-29 05:03:18,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165628038] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:03:18,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:03:18,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:03:18,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666594285] [2023-11-29 05:03:18,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:03:18,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:03:18,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:18,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:03:18,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:03:18,223 INFO L87 Difference]: Start difference. First operand 9177 states and 14397 transitions. Second operand has 4 states, 4 states have (on average 37.75) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:03:18,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:03:18,857 INFO L93 Difference]: Finished difference Result 18165 states and 28409 transitions. [2023-11-29 05:03:18,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:03:18,858 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 493 [2023-11-29 05:03:18,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:03:18,871 INFO L225 Difference]: With dead ends: 18165 [2023-11-29 05:03:18,871 INFO L226 Difference]: Without dead ends: 9458 [2023-11-29 05:03:18,878 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 493 GetRequests, 490 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 05:03:18,879 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 374 mSDsluCounter, 909 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 374 SdHoareTripleChecker+Valid, 1375 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 05:03:18,879 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [374 Valid, 1375 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 05:03:18,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9458 states. [2023-11-29 05:03:19,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9458 to 9177. [2023-11-29 05:03:19,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9177 states, 8502 states have (on average 1.543519171959539) internal successors, (13123), 8518 states have internal predecessors, (13123), 587 states have call successors, (587), 87 states have call predecessors, (587), 87 states have return successors, (587), 571 states have call predecessors, (587), 587 states have call successors, (587) [2023-11-29 05:03:19,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9177 states to 9177 states and 14297 transitions. [2023-11-29 05:03:19,357 INFO L78 Accepts]: Start accepts. Automaton has 9177 states and 14297 transitions. Word has length 493 [2023-11-29 05:03:19,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:03:19,358 INFO L495 AbstractCegarLoop]: Abstraction has 9177 states and 14297 transitions. [2023-11-29 05:03:19,358 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.75) internal successors, (151), 3 states have internal predecessors, (151), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:03:19,359 INFO L276 IsEmpty]: Start isEmpty. Operand 9177 states and 14297 transitions. [2023-11-29 05:03:19,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2023-11-29 05:03:19,367 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:03:19,368 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:03:19,377 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 05:03:19,568 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:19,569 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:03:19,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:19,569 INFO L85 PathProgramCache]: Analyzing trace with hash -2082691872, now seen corresponding path program 1 times [2023-11-29 05:03:19,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:19,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606279947] [2023-11-29 05:03:19,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:19,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:19,639 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:03:19,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251509362] [2023-11-29 05:03:19,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:19,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:19,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:19,641 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:19,644 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 05:03:20,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:20,242 INFO L262 TraceCheckSpWp]: Trace formula consists of 1243 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 05:03:20,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:21,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 05:03:21,374 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:03:21,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:21,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606279947] [2023-11-29 05:03:21,374 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:03:21,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251509362] [2023-11-29 05:03:21,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251509362] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:03:21,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:03:21,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:03:21,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180528096] [2023-11-29 05:03:21,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:03:21,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:03:21,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:21,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:03:21,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:03:21,377 INFO L87 Difference]: Start difference. First operand 9177 states and 14297 transitions. Second operand has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:03:22,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:03:22,170 INFO L93 Difference]: Finished difference Result 18739 states and 29167 transitions. [2023-11-29 05:03:22,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:03:22,171 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 494 [2023-11-29 05:03:22,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:03:22,183 INFO L225 Difference]: With dead ends: 18739 [2023-11-29 05:03:22,184 INFO L226 Difference]: Without dead ends: 9714 [2023-11-29 05:03:22,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 491 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 05:03:22,194 INFO L413 NwaCegarLoop]: 460 mSDtfsCounter, 400 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 400 SdHoareTripleChecker+Valid, 1351 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:03:22,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [400 Valid, 1351 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:03:22,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9714 states. [2023-11-29 05:03:22,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9714 to 9176. [2023-11-29 05:03:22,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9176 states, 8501 states have (on average 1.54334784143042) internal successors, (13120), 8517 states have internal predecessors, (13120), 587 states have call successors, (587), 87 states have call predecessors, (587), 87 states have return successors, (587), 571 states have call predecessors, (587), 587 states have call successors, (587) [2023-11-29 05:03:22,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9176 states to 9176 states and 14294 transitions. [2023-11-29 05:03:22,660 INFO L78 Accepts]: Start accepts. Automaton has 9176 states and 14294 transitions. Word has length 494 [2023-11-29 05:03:22,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:03:22,661 INFO L495 AbstractCegarLoop]: Abstraction has 9176 states and 14294 transitions. [2023-11-29 05:03:22,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.0) internal successors, (152), 3 states have internal predecessors, (152), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:03:22,661 INFO L276 IsEmpty]: Start isEmpty. Operand 9176 states and 14294 transitions. [2023-11-29 05:03:22,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2023-11-29 05:03:22,671 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:03:22,671 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:03:22,680 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 05:03:22,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 05:03:22,872 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:03:22,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:22,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1022005230, now seen corresponding path program 1 times [2023-11-29 05:03:22,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:22,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483801423] [2023-11-29 05:03:22,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:22,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:22,937 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:03:22,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1424068202] [2023-11-29 05:03:22,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:22,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:22,938 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:22,939 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:22,940 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 05:03:23,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:23,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 1241 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 05:03:23,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:24,865 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 05:03:24,865 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:03:24,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:24,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483801423] [2023-11-29 05:03:24,866 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:03:24,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424068202] [2023-11-29 05:03:24,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424068202] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:03:24,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:03:24,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:03:24,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340211514] [2023-11-29 05:03:24,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:03:24,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:03:24,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:24,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:03:24,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:03:24,869 INFO L87 Difference]: Start difference. First operand 9176 states and 14294 transitions. Second operand has 8 states, 8 states have (on average 19.0) internal successors, (152), 7 states have internal predecessors, (152), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:03:27,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:03:27,547 INFO L93 Difference]: Finished difference Result 35554 states and 55268 transitions. [2023-11-29 05:03:27,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 05:03:27,547 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 7 states have internal predecessors, (152), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 494 [2023-11-29 05:03:27,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:03:27,592 INFO L225 Difference]: With dead ends: 35554 [2023-11-29 05:03:27,592 INFO L226 Difference]: Without dead ends: 28897 [2023-11-29 05:03:27,606 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 487 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:03:27,607 INFO L413 NwaCegarLoop]: 860 mSDtfsCounter, 3475 mSDsluCounter, 4499 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3475 SdHoareTripleChecker+Valid, 5359 SdHoareTripleChecker+Invalid, 1057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:03:27,607 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3475 Valid, 5359 Invalid, 1057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 05:03:27,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28897 states. [2023-11-29 05:03:28,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28897 to 18913. [2023-11-29 05:03:28,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18913 states, 17642 states have (on average 1.5486906246457317) internal successors, (27322), 17674 states have internal predecessors, (27322), 1105 states have call successors, (1105), 165 states have call predecessors, (1105), 165 states have return successors, (1105), 1073 states have call predecessors, (1105), 1105 states have call successors, (1105) [2023-11-29 05:03:28,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18913 states to 18913 states and 29532 transitions. [2023-11-29 05:03:28,787 INFO L78 Accepts]: Start accepts. Automaton has 18913 states and 29532 transitions. Word has length 494 [2023-11-29 05:03:28,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:03:28,788 INFO L495 AbstractCegarLoop]: Abstraction has 18913 states and 29532 transitions. [2023-11-29 05:03:28,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.0) internal successors, (152), 7 states have internal predecessors, (152), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:03:28,788 INFO L276 IsEmpty]: Start isEmpty. Operand 18913 states and 29532 transitions. [2023-11-29 05:03:28,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 495 [2023-11-29 05:03:28,797 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:03:28,798 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:03:28,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 05:03:28,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 05:03:28,999 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:03:28,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:28,999 INFO L85 PathProgramCache]: Analyzing trace with hash 604608624, now seen corresponding path program 1 times [2023-11-29 05:03:28,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:29,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119209222] [2023-11-29 05:03:29,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:29,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:29,070 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:03:29,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513237636] [2023-11-29 05:03:29,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:29,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:29,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:29,072 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:29,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 05:03:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:29,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 1242 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 05:03:29,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:30,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 05:03:30,218 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:03:30,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:30,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119209222] [2023-11-29 05:03:30,218 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:03:30,218 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513237636] [2023-11-29 05:03:30,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513237636] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:03:30,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:03:30,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:03:30,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266414234] [2023-11-29 05:03:30,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:03:30,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:03:30,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:30,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:03:30,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:03:30,221 INFO L87 Difference]: Start difference. First operand 18913 states and 29532 transitions. Second operand has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 5 states have internal predecessors, (152), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:03:32,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:03:32,345 INFO L93 Difference]: Finished difference Result 50549 states and 78817 transitions. [2023-11-29 05:03:32,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:03:32,346 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 5 states have internal predecessors, (152), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 494 [2023-11-29 05:03:32,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:03:32,394 INFO L225 Difference]: With dead ends: 50549 [2023-11-29 05:03:32,394 INFO L226 Difference]: Without dead ends: 38911 [2023-11-29 05:03:32,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-29 05:03:32,410 INFO L413 NwaCegarLoop]: 847 mSDtfsCounter, 994 mSDsluCounter, 2385 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 3232 SdHoareTripleChecker+Invalid, 541 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 05:03:32,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [994 Valid, 3232 Invalid, 541 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 05:03:32,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38911 states. [2023-11-29 05:03:34,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38911 to 34707. [2023-11-29 05:03:34,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34707 states, 32244 states have (on average 1.540069470289046) internal successors, (49658), 32308 states have internal predecessors, (49658), 2141 states have call successors, (2141), 321 states have call predecessors, (2141), 321 states have return successors, (2141), 2077 states have call predecessors, (2141), 2141 states have call successors, (2141) [2023-11-29 05:03:34,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34707 states to 34707 states and 53940 transitions. [2023-11-29 05:03:34,188 INFO L78 Accepts]: Start accepts. Automaton has 34707 states and 53940 transitions. Word has length 494 [2023-11-29 05:03:34,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:03:34,188 INFO L495 AbstractCegarLoop]: Abstraction has 34707 states and 53940 transitions. [2023-11-29 05:03:34,188 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.333333333333332) internal successors, (152), 5 states have internal predecessors, (152), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:03:34,188 INFO L276 IsEmpty]: Start isEmpty. Operand 34707 states and 53940 transitions. [2023-11-29 05:03:34,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-29 05:03:34,200 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:03:34,201 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:03:34,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-29 05:03:34,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 05:03:34,401 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:03:34,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:34,402 INFO L85 PathProgramCache]: Analyzing trace with hash -318160589, now seen corresponding path program 1 times [2023-11-29 05:03:34,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:34,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883991970] [2023-11-29 05:03:34,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:34,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:34,455 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:03:34,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807352218] [2023-11-29 05:03:34,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:34,455 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:34,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:34,456 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:34,460 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 05:03:34,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:34,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 1242 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:03:34,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 05:03:35,106 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:03:35,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:35,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883991970] [2023-11-29 05:03:35,106 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:03:35,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807352218] [2023-11-29 05:03:35,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807352218] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:03:35,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:03:35,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:03:35,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440263764] [2023-11-29 05:03:35,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:03:35,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:03:35,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:35,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:03:35,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:03:35,108 INFO L87 Difference]: Start difference. First operand 34707 states and 53940 transitions. Second operand has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:03:37,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:03:37,419 INFO L93 Difference]: Finished difference Result 75651 states and 117428 transitions. [2023-11-29 05:03:37,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:03:37,420 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 495 [2023-11-29 05:03:37,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:03:37,509 INFO L225 Difference]: With dead ends: 75651 [2023-11-29 05:03:37,509 INFO L226 Difference]: Without dead ends: 52329 [2023-11-29 05:03:37,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:03:37,540 INFO L413 NwaCegarLoop]: 509 mSDtfsCounter, 397 mSDsluCounter, 1386 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 1895 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:03:37,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 1895 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:03:37,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52329 states. [2023-11-29 05:03:40,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52329 to 52267. [2023-11-29 05:03:40,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52267 states, 48612 states have (on average 1.541059820620423) internal successors, (74914), 48708 states have internal predecessors, (74914), 3177 states have call successors, (3177), 477 states have call predecessors, (3177), 477 states have return successors, (3177), 3081 states have call predecessors, (3177), 3177 states have call successors, (3177) [2023-11-29 05:03:40,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52267 states to 52267 states and 81268 transitions. [2023-11-29 05:03:40,310 INFO L78 Accepts]: Start accepts. Automaton has 52267 states and 81268 transitions. Word has length 495 [2023-11-29 05:03:40,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:03:40,310 INFO L495 AbstractCegarLoop]: Abstraction has 52267 states and 81268 transitions. [2023-11-29 05:03:40,310 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.6) internal successors, (153), 5 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:03:40,311 INFO L276 IsEmpty]: Start isEmpty. Operand 52267 states and 81268 transitions. [2023-11-29 05:03:40,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-29 05:03:40,331 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:03:40,332 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:03:40,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 05:03:40,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 05:03:40,532 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:03:40,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:40,533 INFO L85 PathProgramCache]: Analyzing trace with hash -184147083, now seen corresponding path program 1 times [2023-11-29 05:03:40,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:40,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272075342] [2023-11-29 05:03:40,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:40,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:40,593 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:03:40,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [985806975] [2023-11-29 05:03:40,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:40,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:40,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:40,595 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:40,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 05:03:41,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:41,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 1239 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 05:03:41,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:41,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 2780 proven. 168 refuted. 0 times theorem prover too weak. 6436 trivial. 0 not checked. [2023-11-29 05:03:41,733 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:03:42,092 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 36 proven. 168 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-29 05:03:42,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:42,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272075342] [2023-11-29 05:03:42,093 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:03:42,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985806975] [2023-11-29 05:03:42,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985806975] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:03:42,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:03:42,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-29 05:03:42,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299649051] [2023-11-29 05:03:42,094 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:03:42,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:03:42,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:42,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:03:42,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:03:42,096 INFO L87 Difference]: Start difference. First operand 52267 states and 81268 transitions. Second operand has 10 states, 10 states have (on average 23.4) internal successors, (234), 10 states have internal predecessors, (234), 3 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 3 states have call predecessors, (126), 3 states have call successors, (126) [2023-11-29 05:03:45,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:03:45,198 INFO L93 Difference]: Finished difference Result 103047 states and 159710 transitions. [2023-11-29 05:03:45,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:03:45,199 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 23.4) internal successors, (234), 10 states have internal predecessors, (234), 3 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 3 states have call predecessors, (126), 3 states have call successors, (126) Word has length 495 [2023-11-29 05:03:45,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:03:45,286 INFO L225 Difference]: With dead ends: 103047 [2023-11-29 05:03:45,286 INFO L226 Difference]: Without dead ends: 53169 [2023-11-29 05:03:45,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 999 GetRequests, 980 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=150, Invalid=270, Unknown=0, NotChecked=0, Total=420 [2023-11-29 05:03:45,321 INFO L413 NwaCegarLoop]: 384 mSDtfsCounter, 511 mSDsluCounter, 778 mSDsCounter, 0 mSdLazyCounter, 820 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 820 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 05:03:45,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [523 Valid, 1162 Invalid, 879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 820 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 05:03:45,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53169 states. [2023-11-29 05:03:48,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53169 to 52703. [2023-11-29 05:03:48,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52703 states, 48939 states have (on average 1.5330309160383335) internal successors, (75025), 49035 states have internal predecessors, (75025), 3177 states have call successors, (3177), 586 states have call predecessors, (3177), 586 states have return successors, (3177), 3081 states have call predecessors, (3177), 3177 states have call successors, (3177) [2023-11-29 05:03:48,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52703 states to 52703 states and 81379 transitions. [2023-11-29 05:03:48,456 INFO L78 Accepts]: Start accepts. Automaton has 52703 states and 81379 transitions. Word has length 495 [2023-11-29 05:03:48,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:03:48,457 INFO L495 AbstractCegarLoop]: Abstraction has 52703 states and 81379 transitions. [2023-11-29 05:03:48,457 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.4) internal successors, (234), 10 states have internal predecessors, (234), 3 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 3 states have call predecessors, (126), 3 states have call successors, (126) [2023-11-29 05:03:48,457 INFO L276 IsEmpty]: Start isEmpty. Operand 52703 states and 81379 transitions. [2023-11-29 05:03:48,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-29 05:03:48,480 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:03:48,480 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:03:48,492 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 05:03:48,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 05:03:48,681 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:03:48,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:03:48,682 INFO L85 PathProgramCache]: Analyzing trace with hash -676773257, now seen corresponding path program 1 times [2023-11-29 05:03:48,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:03:48,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539538804] [2023-11-29 05:03:48,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:48,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:03:48,744 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:03:48,744 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1312427200] [2023-11-29 05:03:48,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:03:48,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:03:48,745 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:03:48,746 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:03:48,748 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 05:03:49,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:03:49,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 1239 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 05:03:49,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:03:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 05:03:50,746 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:03:50,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:03:50,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539538804] [2023-11-29 05:03:50,747 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:03:50,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312427200] [2023-11-29 05:03:50,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1312427200] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:03:50,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:03:50,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:03:50,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73413374] [2023-11-29 05:03:50,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:03:50,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:03:50,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:03:50,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:03:50,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:03:50,749 INFO L87 Difference]: Start difference. First operand 52703 states and 81379 transitions. Second operand has 8 states, 8 states have (on average 19.125) internal successors, (153), 7 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:03:57,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:03:57,650 INFO L93 Difference]: Finished difference Result 141819 states and 218171 transitions. [2023-11-29 05:03:57,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 05:03:57,651 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 7 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 495 [2023-11-29 05:03:57,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:03:57,803 INFO L225 Difference]: With dead ends: 141819 [2023-11-29 05:03:57,804 INFO L226 Difference]: Without dead ends: 103561 [2023-11-29 05:03:57,847 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 488 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:03:57,848 INFO L413 NwaCegarLoop]: 926 mSDtfsCounter, 3310 mSDsluCounter, 4070 mSDsCounter, 0 mSdLazyCounter, 1006 mSolverCounterSat, 530 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3310 SdHoareTripleChecker+Valid, 4996 SdHoareTripleChecker+Invalid, 1536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 530 IncrementalHoareTripleChecker+Valid, 1006 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:03:57,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3310 Valid, 4996 Invalid, 1536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [530 Valid, 1006 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-29 05:03:57,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103561 states. [2023-11-29 05:04:00,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103561 to 68285. [2023-11-29 05:04:01,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68285 states, 64521 states have (on average 1.5496505013871453) internal successors, (99985), 64617 states have internal predecessors, (99985), 3177 states have call successors, (3177), 586 states have call predecessors, (3177), 586 states have return successors, (3177), 3081 states have call predecessors, (3177), 3177 states have call successors, (3177) [2023-11-29 05:04:01,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68285 states to 68285 states and 106339 transitions. [2023-11-29 05:04:01,155 INFO L78 Accepts]: Start accepts. Automaton has 68285 states and 106339 transitions. Word has length 495 [2023-11-29 05:04:01,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:04:01,156 INFO L495 AbstractCegarLoop]: Abstraction has 68285 states and 106339 transitions. [2023-11-29 05:04:01,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.125) internal successors, (153), 7 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:04:01,156 INFO L276 IsEmpty]: Start isEmpty. Operand 68285 states and 106339 transitions. [2023-11-29 05:04:01,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-29 05:04:01,184 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:04:01,184 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:04:01,193 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 05:04:01,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 05:04:01,385 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:04:01,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:04:01,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1540857141, now seen corresponding path program 1 times [2023-11-29 05:04:01,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:04:01,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567968303] [2023-11-29 05:04:01,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:01,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:04:01,434 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:04:01,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [852316684] [2023-11-29 05:04:01,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:01,435 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:01,435 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:04:01,436 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:04:01,438 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 05:04:01,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:01,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 1239 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 05:04:01,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:04:02,321 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 4550 proven. 123 refuted. 0 times theorem prover too weak. 4711 trivial. 0 not checked. [2023-11-29 05:04:02,321 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:04:02,876 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 81 proven. 123 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-29 05:04:02,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:04:02,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567968303] [2023-11-29 05:04:02,877 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:04:02,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852316684] [2023-11-29 05:04:02,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852316684] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:04:02,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:04:02,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-29 05:04:02,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441273444] [2023-11-29 05:04:02,878 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:04:02,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:04:02,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:04:02,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:04:02,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:04:02,880 INFO L87 Difference]: Start difference. First operand 68285 states and 106339 transitions. Second operand has 8 states, 8 states have (on average 27.5) internal successors, (220), 8 states have internal predecessors, (220), 3 states have call successors, (110), 2 states have call predecessors, (110), 4 states have return successors, (111), 3 states have call predecessors, (111), 3 states have call successors, (111) [2023-11-29 05:04:06,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:04:06,394 INFO L93 Difference]: Finished difference Result 120505 states and 186836 transitions. [2023-11-29 05:04:06,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:04:06,395 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 27.5) internal successors, (220), 8 states have internal predecessors, (220), 3 states have call successors, (110), 2 states have call predecessors, (110), 4 states have return successors, (111), 3 states have call predecessors, (111), 3 states have call successors, (111) Word has length 495 [2023-11-29 05:04:06,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:04:06,489 INFO L225 Difference]: With dead ends: 120505 [2023-11-29 05:04:06,489 INFO L226 Difference]: Without dead ends: 61189 [2023-11-29 05:04:06,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 992 GetRequests, 982 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:04:06,532 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 845 mSDsluCounter, 648 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 872 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:04:06,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [872 Valid, 1042 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 05:04:06,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61189 states. [2023-11-29 05:04:10,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61189 to 60723. [2023-11-29 05:04:10,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60723 states, 56922 states have (on average 1.5399669723481255) internal successors, (87658), 57018 states have internal predecessors, (87658), 3177 states have call successors, (3177), 623 states have call predecessors, (3177), 623 states have return successors, (3177), 3081 states have call predecessors, (3177), 3177 states have call successors, (3177) [2023-11-29 05:04:10,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60723 states to 60723 states and 94012 transitions. [2023-11-29 05:04:10,366 INFO L78 Accepts]: Start accepts. Automaton has 60723 states and 94012 transitions. Word has length 495 [2023-11-29 05:04:10,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:04:10,366 INFO L495 AbstractCegarLoop]: Abstraction has 60723 states and 94012 transitions. [2023-11-29 05:04:10,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 27.5) internal successors, (220), 8 states have internal predecessors, (220), 3 states have call successors, (110), 2 states have call predecessors, (110), 4 states have return successors, (111), 3 states have call predecessors, (111), 3 states have call successors, (111) [2023-11-29 05:04:10,367 INFO L276 IsEmpty]: Start isEmpty. Operand 60723 states and 94012 transitions. [2023-11-29 05:04:10,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-29 05:04:10,400 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:04:10,400 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:04:10,407 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 05:04:10,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 05:04:10,602 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:04:10,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:04:10,602 INFO L85 PathProgramCache]: Analyzing trace with hash -1811514505, now seen corresponding path program 1 times [2023-11-29 05:04:10,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:04:10,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564240720] [2023-11-29 05:04:10,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:10,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:04:10,663 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:04:10,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1261319696] [2023-11-29 05:04:10,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:10,664 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:10,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:04:10,664 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:04:10,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 05:04:11,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:11,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 1236 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 05:04:11,235 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:04:11,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 05:04:11,656 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:04:11,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:04:11,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564240720] [2023-11-29 05:04:11,656 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:04:11,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261319696] [2023-11-29 05:04:11,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261319696] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:04:11,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:04:11,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:04:11,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109919154] [2023-11-29 05:04:11,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:04:11,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:04:11,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:04:11,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:04:11,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:04:11,659 INFO L87 Difference]: Start difference. First operand 60723 states and 94012 transitions. Second operand has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:04:14,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:04:14,336 INFO L93 Difference]: Finished difference Result 77649 states and 119599 transitions. [2023-11-29 05:04:14,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:04:14,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 495 [2023-11-29 05:04:14,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:04:14,415 INFO L225 Difference]: With dead ends: 77649 [2023-11-29 05:04:14,415 INFO L226 Difference]: Without dead ends: 52127 [2023-11-29 05:04:14,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 492 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 05:04:14,438 INFO L413 NwaCegarLoop]: 466 mSDtfsCounter, 393 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 1393 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 05:04:14,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 1393 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 05:04:14,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52127 states. [2023-11-29 05:04:17,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52127 to 51243. [2023-11-29 05:04:17,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51243 states, 47442 states have (on average 1.5352008768601662) internal successors, (72833), 47538 states have internal predecessors, (72833), 3177 states have call successors, (3177), 623 states have call predecessors, (3177), 623 states have return successors, (3177), 3081 states have call predecessors, (3177), 3177 states have call successors, (3177) [2023-11-29 05:04:17,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51243 states to 51243 states and 79187 transitions. [2023-11-29 05:04:17,206 INFO L78 Accepts]: Start accepts. Automaton has 51243 states and 79187 transitions. Word has length 495 [2023-11-29 05:04:17,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:04:17,206 INFO L495 AbstractCegarLoop]: Abstraction has 51243 states and 79187 transitions. [2023-11-29 05:04:17,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.25) internal successors, (153), 3 states have internal predecessors, (153), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:04:17,207 INFO L276 IsEmpty]: Start isEmpty. Operand 51243 states and 79187 transitions. [2023-11-29 05:04:17,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-29 05:04:17,230 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:04:17,231 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:04:17,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 05:04:17,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 05:04:17,431 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:04:17,432 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:04:17,432 INFO L85 PathProgramCache]: Analyzing trace with hash 128894466, now seen corresponding path program 1 times [2023-11-29 05:04:17,432 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:04:17,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647658488] [2023-11-29 05:04:17,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:17,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:04:17,516 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:04:17,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [882693378] [2023-11-29 05:04:17,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:17,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:17,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:04:17,518 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:04:17,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 05:04:18,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:18,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 1238 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 05:04:18,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:04:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 3500 proven. 48 refuted. 0 times theorem prover too weak. 5836 trivial. 0 not checked. [2023-11-29 05:04:18,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:04:18,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 156 proven. 48 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-29 05:04:18,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:04:18,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647658488] [2023-11-29 05:04:18,821 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:04:18,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882693378] [2023-11-29 05:04:18,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882693378] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:04:18,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:04:18,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-29 05:04:18,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364608321] [2023-11-29 05:04:18,822 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:04:18,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 05:04:18,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:04:18,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 05:04:18,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:04:18,825 INFO L87 Difference]: Start difference. First operand 51243 states and 79187 transitions. Second operand has 10 states, 10 states have (on average 23.3) internal successors, (233), 10 states have internal predecessors, (233), 3 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 3 states have call predecessors, (86), 3 states have call successors, (86) [2023-11-29 05:04:24,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:04:24,033 INFO L93 Difference]: Finished difference Result 102131 states and 155566 transitions. [2023-11-29 05:04:24,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 05:04:24,034 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 23.3) internal successors, (233), 10 states have internal predecessors, (233), 3 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 3 states have call predecessors, (86), 3 states have call successors, (86) Word has length 495 [2023-11-29 05:04:24,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:04:24,121 INFO L225 Difference]: With dead ends: 102131 [2023-11-29 05:04:24,121 INFO L226 Difference]: Without dead ends: 60479 [2023-11-29 05:04:24,154 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 995 GetRequests, 980 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:04:24,154 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 1042 mSDsluCounter, 1236 mSDsCounter, 0 mSdLazyCounter, 740 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1146 SdHoareTripleChecker+Valid, 1630 SdHoareTripleChecker+Invalid, 971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 740 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 05:04:24,154 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1146 Valid, 1630 Invalid, 971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 740 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 05:04:24,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60479 states. [2023-11-29 05:04:28,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60479 to 59639. [2023-11-29 05:04:28,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59639 states, 53316 states have (on average 1.4892902693375347) internal successors, (79403), 53484 states have internal predecessors, (79403), 5253 states have call successors, (5253), 1069 states have call predecessors, (5253), 1069 states have return successors, (5253), 5085 states have call predecessors, (5253), 5253 states have call successors, (5253) [2023-11-29 05:04:28,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59639 states to 59639 states and 89909 transitions. [2023-11-29 05:04:28,970 INFO L78 Accepts]: Start accepts. Automaton has 59639 states and 89909 transitions. Word has length 495 [2023-11-29 05:04:28,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:04:28,970 INFO L495 AbstractCegarLoop]: Abstraction has 59639 states and 89909 transitions. [2023-11-29 05:04:28,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 23.3) internal successors, (233), 10 states have internal predecessors, (233), 3 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 3 states have call predecessors, (86), 3 states have call successors, (86) [2023-11-29 05:04:28,971 INFO L276 IsEmpty]: Start isEmpty. Operand 59639 states and 89909 transitions. [2023-11-29 05:04:28,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 496 [2023-11-29 05:04:28,987 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:04:28,987 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:04:28,996 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-29 05:04:29,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 05:04:29,188 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:04:29,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:04:29,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1471734537, now seen corresponding path program 1 times [2023-11-29 05:04:29,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:04:29,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083981148] [2023-11-29 05:04:29,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:29,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:04:29,256 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:04:29,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291178101] [2023-11-29 05:04:29,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:29,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:29,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:04:29,258 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:04:29,260 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 05:04:29,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:29,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 1244 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 05:04:29,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:04:31,983 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 4100 proven. 462 refuted. 0 times theorem prover too weak. 4822 trivial. 0 not checked. [2023-11-29 05:04:31,984 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:04:32,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 132 proven. 471 refuted. 0 times theorem prover too weak. 8781 trivial. 0 not checked. [2023-11-29 05:04:32,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:04:32,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083981148] [2023-11-29 05:04:32,568 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:04:32,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291178101] [2023-11-29 05:04:32,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291178101] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:04:32,568 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:04:32,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2023-11-29 05:04:32,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185830897] [2023-11-29 05:04:32,569 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:04:32,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 05:04:32,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:04:32,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 05:04:32,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2023-11-29 05:04:32,573 INFO L87 Difference]: Start difference. First operand 59639 states and 89909 transitions. Second operand has 21 states, 21 states have (on average 10.285714285714286) internal successors, (216), 21 states have internal predecessors, (216), 6 states have call successors, (125), 4 states have call predecessors, (125), 10 states have return successors, (126), 6 states have call predecessors, (126), 6 states have call successors, (126) [2023-11-29 05:04:37,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:04:37,608 INFO L93 Difference]: Finished difference Result 95577 states and 142938 transitions. [2023-11-29 05:04:37,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 05:04:37,609 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 10.285714285714286) internal successors, (216), 21 states have internal predecessors, (216), 6 states have call successors, (125), 4 states have call predecessors, (125), 10 states have return successors, (126), 6 states have call predecessors, (126), 6 states have call successors, (126) Word has length 495 [2023-11-29 05:04:37,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:04:37,663 INFO L225 Difference]: With dead ends: 95577 [2023-11-29 05:04:37,663 INFO L226 Difference]: Without dead ends: 36530 [2023-11-29 05:04:37,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1001 GetRequests, 968 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=788, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 05:04:37,699 INFO L413 NwaCegarLoop]: 347 mSDtfsCounter, 2201 mSDsluCounter, 946 mSDsCounter, 0 mSdLazyCounter, 861 mSolverCounterSat, 333 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2213 SdHoareTripleChecker+Valid, 1293 SdHoareTripleChecker+Invalid, 1194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 333 IncrementalHoareTripleChecker+Valid, 861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:04:37,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2213 Valid, 1293 Invalid, 1194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [333 Valid, 861 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 05:04:37,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36530 states. [2023-11-29 05:04:41,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36530 to 35678. [2023-11-29 05:04:41,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35678 states, 30649 states have (on average 1.4608306959444028) internal successors, (44773), 30757 states have internal predecessors, (44773), 4089 states have call successors, (4089), 939 states have call predecessors, (4089), 939 states have return successors, (4089), 3981 states have call predecessors, (4089), 4089 states have call successors, (4089) [2023-11-29 05:04:41,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35678 states to 35678 states and 52951 transitions. [2023-11-29 05:04:41,411 INFO L78 Accepts]: Start accepts. Automaton has 35678 states and 52951 transitions. Word has length 495 [2023-11-29 05:04:41,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:04:41,412 INFO L495 AbstractCegarLoop]: Abstraction has 35678 states and 52951 transitions. [2023-11-29 05:04:41,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 10.285714285714286) internal successors, (216), 21 states have internal predecessors, (216), 6 states have call successors, (125), 4 states have call predecessors, (125), 10 states have return successors, (126), 6 states have call predecessors, (126), 6 states have call successors, (126) [2023-11-29 05:04:41,412 INFO L276 IsEmpty]: Start isEmpty. Operand 35678 states and 52951 transitions. [2023-11-29 05:04:41,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2023-11-29 05:04:41,421 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:04:41,422 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:04:41,430 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 05:04:41,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:41,622 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:04:41,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:04:41,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1441396957, now seen corresponding path program 1 times [2023-11-29 05:04:41,623 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:04:41,623 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168049060] [2023-11-29 05:04:41,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:41,623 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:04:41,676 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:04:41,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1804948251] [2023-11-29 05:04:41,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:41,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:41,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:04:41,678 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:04:41,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 05:04:42,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:42,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 1242 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 05:04:42,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:04:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 05:04:42,525 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:04:42,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:04:42,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168049060] [2023-11-29 05:04:42,526 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:04:42,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804948251] [2023-11-29 05:04:42,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804948251] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:04:42,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:04:42,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:04:42,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331470664] [2023-11-29 05:04:42,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:04:42,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:04:42,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:04:42,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:04:42,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:04:42,528 INFO L87 Difference]: Start difference. First operand 35678 states and 52951 transitions. Second operand has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:04:48,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:04:48,489 INFO L93 Difference]: Finished difference Result 81618 states and 119478 transitions. [2023-11-29 05:04:48,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:04:48,490 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 496 [2023-11-29 05:04:48,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:04:48,580 INFO L225 Difference]: With dead ends: 81618 [2023-11-29 05:04:48,580 INFO L226 Difference]: Without dead ends: 52530 [2023-11-29 05:04:48,608 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 495 GetRequests, 494 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 05:04:48,609 INFO L413 NwaCegarLoop]: 657 mSDtfsCounter, 393 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 1093 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:04:48,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [393 Valid, 1093 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:04:48,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52530 states. [2023-11-29 05:04:54,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52530 to 42884. [2023-11-29 05:04:54,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42884 states, 36559 states have (on average 1.4507234880603954) internal successors, (53037), 36697 states have internal predecessors, (53037), 5145 states have call successors, (5145), 1179 states have call predecessors, (5145), 1179 states have return successors, (5145), 5007 states have call predecessors, (5145), 5145 states have call successors, (5145) [2023-11-29 05:04:54,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42884 states to 42884 states and 63327 transitions. [2023-11-29 05:04:54,345 INFO L78 Accepts]: Start accepts. Automaton has 42884 states and 63327 transitions. Word has length 496 [2023-11-29 05:04:54,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:04:54,345 INFO L495 AbstractCegarLoop]: Abstraction has 42884 states and 63327 transitions. [2023-11-29 05:04:54,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 51.333333333333336) internal successors, (154), 3 states have internal predecessors, (154), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:04:54,346 INFO L276 IsEmpty]: Start isEmpty. Operand 42884 states and 63327 transitions. [2023-11-29 05:04:54,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2023-11-29 05:04:54,355 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:04:54,355 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:04:54,364 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 05:04:54,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 05:04:54,556 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:04:54,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:04:54,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1000405549, now seen corresponding path program 1 times [2023-11-29 05:04:54,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:04:54,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200330071] [2023-11-29 05:04:54,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:54,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:04:54,617 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:04:54,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1807229743] [2023-11-29 05:04:54,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:54,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:04:54,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:04:54,618 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:04:54,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 05:04:55,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:04:55,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 05:04:55,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:04:55,981 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 2780 proven. 168 refuted. 0 times theorem prover too weak. 6436 trivial. 0 not checked. [2023-11-29 05:04:55,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:04:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 36 proven. 168 refuted. 0 times theorem prover too weak. 9180 trivial. 0 not checked. [2023-11-29 05:04:56,598 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:04:56,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200330071] [2023-11-29 05:04:56,598 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:04:56,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807229743] [2023-11-29 05:04:56,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807229743] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:04:56,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 05:04:56,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2023-11-29 05:04:56,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319514383] [2023-11-29 05:04:56,600 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 05:04:56,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 05:04:56,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:04:56,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 05:04:56,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2023-11-29 05:04:56,603 INFO L87 Difference]: Start difference. First operand 42884 states and 63327 transitions. Second operand has 13 states, 13 states have (on average 16.46153846153846) internal successors, (214), 13 states have internal predecessors, (214), 2 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 2 states have call predecessors, (126), 2 states have call successors, (126) [2023-11-29 05:05:10,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:05:10,670 INFO L93 Difference]: Finished difference Result 149440 states and 222424 transitions. [2023-11-29 05:05:10,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 05:05:10,671 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 16.46153846153846) internal successors, (214), 13 states have internal predecessors, (214), 2 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 2 states have call predecessors, (126), 2 states have call successors, (126) Word has length 496 [2023-11-29 05:05:10,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:05:10,871 INFO L225 Difference]: With dead ends: 149440 [2023-11-29 05:05:10,871 INFO L226 Difference]: Without dead ends: 128417 [2023-11-29 05:05:10,957 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1007 GetRequests, 979 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2023-11-29 05:05:10,957 INFO L413 NwaCegarLoop]: 499 mSDtfsCounter, 1791 mSDsluCounter, 2839 mSDsCounter, 0 mSdLazyCounter, 1961 mSolverCounterSat, 401 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1816 SdHoareTripleChecker+Valid, 3338 SdHoareTripleChecker+Invalid, 2362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 401 IncrementalHoareTripleChecker+Valid, 1961 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:05:10,958 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1816 Valid, 3338 Invalid, 2362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [401 Valid, 1961 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 05:05:11,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128417 states. [2023-11-29 05:05:17,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128417 to 47288. [2023-11-29 05:05:17,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47288 states, 40963 states have (on average 1.458853111344384) internal successors, (59759), 41101 states have internal predecessors, (59759), 5145 states have call successors, (5145), 1179 states have call predecessors, (5145), 1179 states have return successors, (5145), 5007 states have call predecessors, (5145), 5145 states have call successors, (5145) [2023-11-29 05:05:17,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47288 states to 47288 states and 70049 transitions. [2023-11-29 05:05:17,571 INFO L78 Accepts]: Start accepts. Automaton has 47288 states and 70049 transitions. Word has length 496 [2023-11-29 05:05:17,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:05:17,572 INFO L495 AbstractCegarLoop]: Abstraction has 47288 states and 70049 transitions. [2023-11-29 05:05:17,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 16.46153846153846) internal successors, (214), 13 states have internal predecessors, (214), 2 states have call successors, (125), 2 states have call predecessors, (125), 4 states have return successors, (126), 2 states have call predecessors, (126), 2 states have call successors, (126) [2023-11-29 05:05:17,572 INFO L276 IsEmpty]: Start isEmpty. Operand 47288 states and 70049 transitions. [2023-11-29 05:05:17,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 497 [2023-11-29 05:05:17,581 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:05:17,582 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:05:17,590 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 05:05:17,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:05:17,782 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:05:17,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:05:17,783 INFO L85 PathProgramCache]: Analyzing trace with hash -834712589, now seen corresponding path program 1 times [2023-11-29 05:05:17,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:05:17,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181138447] [2023-11-29 05:05:17,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:05:17,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:05:17,844 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:05:17,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42602393] [2023-11-29 05:05:17,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:05:17,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:05:17,844 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:05:17,845 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:05:17,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 05:05:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:05:18,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 1244 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 05:05:18,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:05:19,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9384 trivial. 0 not checked. [2023-11-29 05:05:19,956 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:05:19,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:05:19,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181138447] [2023-11-29 05:05:19,956 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 05:05:19,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42602393] [2023-11-29 05:05:19,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42602393] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:05:19,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:05:19,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:05:19,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136661095] [2023-11-29 05:05:19,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:05:19,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:05:19,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:05:19,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:05:19,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:05:19,959 INFO L87 Difference]: Start difference. First operand 47288 states and 70049 transitions. Second operand has 6 states, 6 states have (on average 25.666666666666668) internal successors, (154), 5 states have internal predecessors, (154), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:05:26,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:05:26,193 INFO L93 Difference]: Finished difference Result 94718 states and 139961 transitions. [2023-11-29 05:05:26,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:05:26,194 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.666666666666668) internal successors, (154), 5 states have internal predecessors, (154), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) Word has length 496 [2023-11-29 05:05:26,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:05:26,274 INFO L225 Difference]: With dead ends: 94718 [2023-11-29 05:05:26,274 INFO L226 Difference]: Without dead ends: 52220 [2023-11-29 05:05:26,308 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 491 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2023-11-29 05:05:26,308 INFO L413 NwaCegarLoop]: 828 mSDtfsCounter, 1332 mSDsluCounter, 2149 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 417 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1332 SdHoareTripleChecker+Valid, 2977 SdHoareTripleChecker+Invalid, 586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 417 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:05:26,309 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1332 Valid, 2977 Invalid, 586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [417 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 05:05:26,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52220 states. [2023-11-29 05:05:31,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52220 to 47288. [2023-11-29 05:05:31,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47288 states, 40963 states have (on average 1.4535800600541953) internal successors, (59543), 41101 states have internal predecessors, (59543), 5145 states have call successors, (5145), 1179 states have call predecessors, (5145), 1179 states have return successors, (5145), 5007 states have call predecessors, (5145), 5145 states have call successors, (5145) [2023-11-29 05:05:32,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47288 states to 47288 states and 69833 transitions. [2023-11-29 05:05:32,093 INFO L78 Accepts]: Start accepts. Automaton has 47288 states and 69833 transitions. Word has length 496 [2023-11-29 05:05:32,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:05:32,093 INFO L495 AbstractCegarLoop]: Abstraction has 47288 states and 69833 transitions. [2023-11-29 05:05:32,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.666666666666668) internal successors, (154), 5 states have internal predecessors, (154), 1 states have call successors, (69), 1 states have call predecessors, (69), 1 states have return successors, (69), 1 states have call predecessors, (69), 1 states have call successors, (69) [2023-11-29 05:05:32,094 INFO L276 IsEmpty]: Start isEmpty. Operand 47288 states and 69833 transitions. [2023-11-29 05:05:32,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 498 [2023-11-29 05:05:32,104 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:05:32,105 INFO L195 NwaCegarLoop]: trace histogram [69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 05:05:32,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 05:05:32,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:05:32,306 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 05:05:32,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:05:32,306 INFO L85 PathProgramCache]: Analyzing trace with hash -391399009, now seen corresponding path program 1 times [2023-11-29 05:05:32,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:05:32,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143843774] [2023-11-29 05:05:32,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:05:32,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:05:32,362 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 05:05:32,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1503795242] [2023-11-29 05:05:32,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:05:32,362 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:05:32,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:05:32,363 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:05:32,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_5d6dc419-3525-4e3f-ab29-9c1a7d5e1422/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 05:09:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:09:17,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 1245 conjuncts, 160 conjunts are in the unsatisfiable core [2023-11-29 05:09:17,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:10:16,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9384 backedges. 7082 proven. 1281 refuted. 0 times theorem prover too weak. 1021 trivial. 0 not checked. [2023-11-29 05:10:16,533 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:10:25,866 WARN L293 SmtUtils]: Spent 8.05s on a formula simplification that was a NOOP. DAG size: 37 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2023-11-29 05:15:21,986 WARN L293 SmtUtils]: Spent 6.06s on a formula simplification that was a NOOP. DAG size: 99 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate)