./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-91.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/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_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-91.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/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_b484c1d7-c8a1-498d-8368-ebf23ea65936/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 44a99e37bd4c1789c639eeb1fddddb52ff04b95cd337cf1d9ec2d82c2bdc4500 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 07:02:56,798 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 07:02:56,862 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 07:02:56,866 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 07:02:56,867 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 07:02:56,892 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 07:02:56,892 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 07:02:56,893 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 07:02:56,894 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 07:02:56,894 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 07:02:56,895 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 07:02:56,895 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 07:02:56,896 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 07:02:56,896 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 07:02:56,897 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 07:02:56,897 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 07:02:56,898 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 07:02:56,898 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 07:02:56,899 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 07:02:56,899 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 07:02:56,900 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 07:02:56,900 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 07:02:56,901 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 07:02:56,901 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 07:02:56,902 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 07:02:56,902 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 07:02:56,903 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 07:02:56,903 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 07:02:56,904 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 07:02:56,904 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 07:02:56,905 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 07:02:56,905 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 07:02:56,906 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 07:02:56,906 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 07:02:56,906 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 07:02:56,906 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 07:02:56,906 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 07:02:56,907 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 07:02:56,907 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 07:02:56,907 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 07:02:56,907 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 07:02:56,907 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 07:02:56,908 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_b484c1d7-c8a1-498d-8368-ebf23ea65936/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44a99e37bd4c1789c639eeb1fddddb52ff04b95cd337cf1d9ec2d82c2bdc4500 [2023-11-29 07:02:57,135 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 07:02:57,157 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 07:02:57,160 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 07:02:57,161 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 07:02:57,162 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 07:02:57,163 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-91.i [2023-11-29 07:02:59,941 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 07:03:00,204 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 07:03:00,205 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-91.i [2023-11-29 07:03:00,222 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/data/bbdc46be3/9ff94de6a1d347e8b726ce35c79cfad6/FLAGe0f287c21 [2023-11-29 07:03:00,236 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/data/bbdc46be3/9ff94de6a1d347e8b726ce35c79cfad6 [2023-11-29 07:03:00,239 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 07:03:00,240 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 07:03:00,242 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 07:03:00,242 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 07:03:00,248 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 07:03:00,248 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:03:00" (1/1) ... [2023-11-29 07:03:00,250 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36b6dac2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:00, skipping insertion in model container [2023-11-29 07:03:00,250 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 07:03:00" (1/1) ... [2023-11-29 07:03:00,314 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 07:03:00,467 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_b484c1d7-c8a1-498d-8368-ebf23ea65936/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-91.i[916,929] [2023-11-29 07:03:00,674 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 07:03:00,691 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 07:03:00,702 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_b484c1d7-c8a1-498d-8368-ebf23ea65936/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-91.i[916,929] [2023-11-29 07:03:00,824 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 07:03:00,845 INFO L206 MainTranslator]: Completed translation [2023-11-29 07:03:00,846 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:00 WrapperNode [2023-11-29 07:03:00,846 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 07:03:00,847 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 07:03:00,847 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 07:03:00,847 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 07:03:00,854 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:00" (1/1) ... [2023-11-29 07:03:00,876 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:00" (1/1) ... [2023-11-29 07:03:01,016 INFO L138 Inliner]: procedures = 26, calls = 79, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 794 [2023-11-29 07:03:01,017 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 07:03:01,018 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 07:03:01,018 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 07:03:01,018 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 07:03:01,029 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:00" (1/1) ... [2023-11-29 07:03:01,030 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:00" (1/1) ... [2023-11-29 07:03:01,047 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:00" (1/1) ... [2023-11-29 07:03:01,099 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 07:03:01,099 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:00" (1/1) ... [2023-11-29 07:03:01,099 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:00" (1/1) ... [2023-11-29 07:03:01,125 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:00" (1/1) ... [2023-11-29 07:03:01,133 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:00" (1/1) ... [2023-11-29 07:03:01,143 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:00" (1/1) ... [2023-11-29 07:03:01,152 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:00" (1/1) ... [2023-11-29 07:03:01,167 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 07:03:01,168 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 07:03:01,168 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 07:03:01,168 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 07:03:01,169 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:00" (1/1) ... [2023-11-29 07:03:01,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 07:03:01,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:01,198 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 07:03:01,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 07:03:01,230 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 07:03:01,230 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 07:03:01,231 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 07:03:01,231 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 07:03:01,231 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 07:03:01,231 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 07:03:01,370 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 07:03:01,371 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 07:03:02,463 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 07:03:02,514 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 07:03:02,514 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 07:03:02,514 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:03:02 BoogieIcfgContainer [2023-11-29 07:03:02,515 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 07:03:02,517 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 07:03:02,517 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 07:03:02,519 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 07:03:02,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 07:03:00" (1/3) ... [2023-11-29 07:03:02,520 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c370673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:03:02, skipping insertion in model container [2023-11-29 07:03:02,520 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 07:03:00" (2/3) ... [2023-11-29 07:03:02,521 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c370673 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 07:03:02, skipping insertion in model container [2023-11-29 07:03:02,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 07:03:02" (3/3) ... [2023-11-29 07:03:02,522 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-91.i [2023-11-29 07:03:02,537 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 07:03:02,537 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 07:03:02,589 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 07:03:02,595 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;@5bf04a64, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 07:03:02,595 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 07:03:02,601 INFO L276 IsEmpty]: Start isEmpty. Operand has 290 states, 221 states have (on average 1.6108597285067874) internal successors, (356), 222 states have internal predecessors, (356), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-29 07:03:02,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2023-11-29 07:03:02,627 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:02,629 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:02,629 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:02,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:02,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1353886927, now seen corresponding path program 1 times [2023-11-29 07:03:02,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:02,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448417867] [2023-11-29 07:03:02,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:02,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:02,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:02,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448417867] [2023-11-29 07:03:02,935 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 07:03:02,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101575408] [2023-11-29 07:03:02,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:02,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:02,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:02,943 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:02,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 07:03:03,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:03,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 07:03:03,395 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:03,465 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 8450 trivial. 0 not checked. [2023-11-29 07:03:03,465 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:03:03,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101575408] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:03:03,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:03:03,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 07:03:03,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4952490] [2023-11-29 07:03:03,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:03:03,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 07:03:03,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:03,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 07:03:03,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 07:03:03,508 INFO L87 Difference]: Start difference. First operand has 290 states, 221 states have (on average 1.6108597285067874) internal successors, (356), 222 states have internal predecessors, (356), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) Second operand has 2 states, 2 states have (on average 71.0) internal successors, (142), 2 states have internal predecessors, (142), 2 states have call successors, (66), 2 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 2 states have call successors, (66) [2023-11-29 07:03:03,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:03,582 INFO L93 Difference]: Finished difference Result 576 states and 1038 transitions. [2023-11-29 07:03:03,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 07:03:03,585 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 71.0) internal successors, (142), 2 states have internal predecessors, (142), 2 states have call successors, (66), 2 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 2 states have call successors, (66) Word has length 467 [2023-11-29 07:03:03,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:03,597 INFO L225 Difference]: With dead ends: 576 [2023-11-29 07:03:03,598 INFO L226 Difference]: Without dead ends: 287 [2023-11-29 07:03:03,604 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 466 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 07:03:03,607 INFO L413 NwaCegarLoop]: 475 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, 475 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 07:03:03,608 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 475 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 07:03:03,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2023-11-29 07:03:03,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2023-11-29 07:03:03,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 219 states have (on average 1.5799086757990868) internal successors, (346), 219 states have internal predecessors, (346), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-29 07:03:03,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 478 transitions. [2023-11-29 07:03:03,683 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 478 transitions. Word has length 467 [2023-11-29 07:03:03,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:03,684 INFO L495 AbstractCegarLoop]: Abstraction has 287 states and 478 transitions. [2023-11-29 07:03:03,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 71.0) internal successors, (142), 2 states have internal predecessors, (142), 2 states have call successors, (66), 2 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 2 states have call successors, (66) [2023-11-29 07:03:03,694 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 478 transitions. [2023-11-29 07:03:03,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2023-11-29 07:03:03,709 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:03,710 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:03,720 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 07:03:03,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:03,911 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:03,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:03,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1079345567, now seen corresponding path program 1 times [2023-11-29 07:03:03,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:03,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725153490] [2023-11-29 07:03:03,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:03,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:04,045 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:04,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113951030] [2023-11-29 07:03:04,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:04,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:04,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:04,048 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:04,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 07:03:04,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:04,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 07:03:04,503 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:04,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-29 07:03:04,574 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:03:04,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:04,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725153490] [2023-11-29 07:03:04,574 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:04,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113951030] [2023-11-29 07:03:04,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113951030] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:03:04,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:03:04,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:03:04,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532608982] [2023-11-29 07:03:04,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:03:04,578 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 07:03:04,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:04,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 07:03:04,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 07:03:04,580 INFO L87 Difference]: Start difference. First operand 287 states and 478 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:04,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:04,718 INFO L93 Difference]: Finished difference Result 856 states and 1426 transitions. [2023-11-29 07:03:04,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 07:03:04,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 467 [2023-11-29 07:03:04,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:04,727 INFO L225 Difference]: With dead ends: 856 [2023-11-29 07:03:04,727 INFO L226 Difference]: Without dead ends: 570 [2023-11-29 07:03:04,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 465 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 07:03:04,730 INFO L413 NwaCegarLoop]: 467 mSDtfsCounter, 463 mSDsluCounter, 459 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 463 SdHoareTripleChecker+Valid, 926 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 07:03:04,731 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [463 Valid, 926 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 07:03:04,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2023-11-29 07:03:04,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 393. [2023-11-29 07:03:04,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 325 states have (on average 1.633846153846154) internal successors, (531), 325 states have internal predecessors, (531), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-29 07:03:04,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 663 transitions. [2023-11-29 07:03:04,777 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 663 transitions. Word has length 467 [2023-11-29 07:03:04,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:04,780 INFO L495 AbstractCegarLoop]: Abstraction has 393 states and 663 transitions. [2023-11-29 07:03:04,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:04,781 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 663 transitions. [2023-11-29 07:03:04,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2023-11-29 07:03:04,791 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:04,792 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:04,800 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 07:03:04,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:04,993 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:04,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:04,993 INFO L85 PathProgramCache]: Analyzing trace with hash 1488960605, now seen corresponding path program 1 times [2023-11-29 07:03:04,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:04,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604238696] [2023-11-29 07:03:04,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:04,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:05,087 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:05,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1080960765] [2023-11-29 07:03:05,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:05,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:05,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:05,089 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:05,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 07:03:05,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:05,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 07:03:05,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:05,564 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-29 07:03:05,564 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:03:05,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:05,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604238696] [2023-11-29 07:03:05,564 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:05,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080960765] [2023-11-29 07:03:05,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080960765] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:03:05,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:03:05,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:03:05,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097527621] [2023-11-29 07:03:05,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:03:05,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 07:03:05,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:05,568 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 07:03:05,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 07:03:05,569 INFO L87 Difference]: Start difference. First operand 393 states and 663 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:05,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:05,680 INFO L93 Difference]: Finished difference Result 1169 states and 1971 transitions. [2023-11-29 07:03:05,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 07:03:05,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 467 [2023-11-29 07:03:05,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:05,688 INFO L225 Difference]: With dead ends: 1169 [2023-11-29 07:03:05,688 INFO L226 Difference]: Without dead ends: 777 [2023-11-29 07:03:05,690 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 465 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 07:03:05,691 INFO L413 NwaCegarLoop]: 644 mSDtfsCounter, 458 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 458 SdHoareTripleChecker+Valid, 1099 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 07:03:05,691 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [458 Valid, 1099 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 07:03:05,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2023-11-29 07:03:05,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 445. [2023-11-29 07:03:05,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 377 states have (on average 1.6392572944297081) internal successors, (618), 377 states have internal predecessors, (618), 66 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 66 states have call predecessors, (66), 66 states have call successors, (66) [2023-11-29 07:03:05,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 750 transitions. [2023-11-29 07:03:05,726 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 750 transitions. Word has length 467 [2023-11-29 07:03:05,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:05,728 INFO L495 AbstractCegarLoop]: Abstraction has 445 states and 750 transitions. [2023-11-29 07:03:05,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:05,728 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 750 transitions. [2023-11-29 07:03:05,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2023-11-29 07:03:05,739 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:05,739 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:05,748 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 07:03:05,940 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:05,940 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:05,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:05,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1872353437, now seen corresponding path program 1 times [2023-11-29 07:03:05,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:05,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487647195] [2023-11-29 07:03:05,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:05,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:06,023 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:06,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [806417188] [2023-11-29 07:03:06,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:06,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:06,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:06,025 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:06,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 07:03:06,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:06,395 INFO L262 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 07:03:06,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-29 07:03:06,470 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:03:06,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:06,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487647195] [2023-11-29 07:03:06,470 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:06,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806417188] [2023-11-29 07:03:06,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806417188] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:03:06,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:03:06,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:03:06,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333576765] [2023-11-29 07:03:06,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:03:06,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 07:03:06,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:06,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 07:03:06,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 07:03:06,474 INFO L87 Difference]: Start difference. First operand 445 states and 750 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:06,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:06,564 INFO L93 Difference]: Finished difference Result 1211 states and 2043 transitions. [2023-11-29 07:03:06,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 07:03:06,565 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 467 [2023-11-29 07:03:06,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:06,570 INFO L225 Difference]: With dead ends: 1211 [2023-11-29 07:03:06,570 INFO L226 Difference]: Without dead ends: 767 [2023-11-29 07:03:06,571 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 465 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 07:03:06,591 INFO L413 NwaCegarLoop]: 699 mSDtfsCounter, 284 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 1157 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 07:03:06,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [284 Valid, 1157 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 07:03:06,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2023-11-29 07:03:06,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 764. [2023-11-29 07:03:06,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 764 states, 665 states have (on average 1.6451127819548872) internal successors, (1094), 666 states have internal predecessors, (1094), 96 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (96), 95 states have call predecessors, (96), 96 states have call successors, (96) [2023-11-29 07:03:06,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 764 states to 764 states and 1286 transitions. [2023-11-29 07:03:06,636 INFO L78 Accepts]: Start accepts. Automaton has 764 states and 1286 transitions. Word has length 467 [2023-11-29 07:03:06,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:06,638 INFO L495 AbstractCegarLoop]: Abstraction has 764 states and 1286 transitions. [2023-11-29 07:03:06,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:06,638 INFO L276 IsEmpty]: Start isEmpty. Operand 764 states and 1286 transitions. [2023-11-29 07:03:06,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2023-11-29 07:03:06,649 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:06,649 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:06,658 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 07:03:06,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:06,853 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:06,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:06,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1481506723, now seen corresponding path program 1 times [2023-11-29 07:03:06,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:06,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262021689] [2023-11-29 07:03:06,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:06,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:06,916 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:06,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1992319979] [2023-11-29 07:03:06,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:06,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:06,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:06,918 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:06,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 07:03:07,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:07,294 INFO L262 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 07:03:07,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-29 07:03:07,415 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:03:07,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:07,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262021689] [2023-11-29 07:03:07,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:07,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992319979] [2023-11-29 07:03:07,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992319979] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:03:07,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:03:07,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:03:07,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516679587] [2023-11-29 07:03:07,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:03:07,418 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 07:03:07,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:07,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 07:03:07,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 07:03:07,419 INFO L87 Difference]: Start difference. First operand 764 states and 1286 transitions. Second operand has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:07,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:07,568 INFO L93 Difference]: Finished difference Result 2223 states and 3741 transitions. [2023-11-29 07:03:07,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 07:03:07,569 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 467 [2023-11-29 07:03:07,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:07,581 INFO L225 Difference]: With dead ends: 2223 [2023-11-29 07:03:07,581 INFO L226 Difference]: Without dead ends: 1460 [2023-11-29 07:03:07,583 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 465 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 07:03:07,585 INFO L413 NwaCegarLoop]: 690 mSDtfsCounter, 319 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 319 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 07:03:07,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [319 Valid, 1136 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 07:03:07,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2023-11-29 07:03:07,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1457. [2023-11-29 07:03:07,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1457 states, 1292 states have (on average 1.6393188854489165) internal successors, (2118), 1295 states have internal predecessors, (2118), 160 states have call successors, (160), 4 states have call predecessors, (160), 4 states have return successors, (160), 157 states have call predecessors, (160), 160 states have call successors, (160) [2023-11-29 07:03:07,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1457 states to 1457 states and 2438 transitions. [2023-11-29 07:03:07,672 INFO L78 Accepts]: Start accepts. Automaton has 1457 states and 2438 transitions. Word has length 467 [2023-11-29 07:03:07,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:07,673 INFO L495 AbstractCegarLoop]: Abstraction has 1457 states and 2438 transitions. [2023-11-29 07:03:07,674 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:07,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1457 states and 2438 transitions. [2023-11-29 07:03:07,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2023-11-29 07:03:07,682 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:07,683 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:07,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 07:03:07,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:07,884 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:07,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:07,884 INFO L85 PathProgramCache]: Analyzing trace with hash -155420063, now seen corresponding path program 1 times [2023-11-29 07:03:07,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:07,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945521082] [2023-11-29 07:03:07,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:07,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:07,957 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:07,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [775103353] [2023-11-29 07:03:07,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:07,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:07,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:07,959 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:07,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 07:03:08,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:08,357 INFO L262 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 07:03:08,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:08,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-29 07:03:08,561 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:03:08,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:08,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945521082] [2023-11-29 07:03:08,562 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:08,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [775103353] [2023-11-29 07:03:08,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [775103353] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:03:08,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:03:08,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 07:03:08,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519462924] [2023-11-29 07:03:08,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:03:08,563 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 07:03:08,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:08,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 07:03:08,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:03:08,565 INFO L87 Difference]: Start difference. First operand 1457 states and 2438 transitions. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:09,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:09,069 INFO L93 Difference]: Finished difference Result 2996 states and 5004 transitions. [2023-11-29 07:03:09,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 07:03:09,070 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 467 [2023-11-29 07:03:09,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:09,082 INFO L225 Difference]: With dead ends: 2996 [2023-11-29 07:03:09,082 INFO L226 Difference]: Without dead ends: 1540 [2023-11-29 07:03:09,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 463 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-29 07:03:09,086 INFO L413 NwaCegarLoop]: 900 mSDtfsCounter, 746 mSDsluCounter, 1560 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 746 SdHoareTripleChecker+Valid, 2460 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 07:03:09,087 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [746 Valid, 2460 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 07:03:09,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2023-11-29 07:03:09,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1288. [2023-11-29 07:03:09,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1288 states, 1152 states have (on average 1.6336805555555556) internal successors, (1882), 1154 states have internal predecessors, (1882), 130 states have call successors, (130), 5 states have call predecessors, (130), 5 states have return successors, (130), 128 states have call predecessors, (130), 130 states have call successors, (130) [2023-11-29 07:03:09,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 2142 transitions. [2023-11-29 07:03:09,141 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 2142 transitions. Word has length 467 [2023-11-29 07:03:09,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:09,142 INFO L495 AbstractCegarLoop]: Abstraction has 1288 states and 2142 transitions. [2023-11-29 07:03:09,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:09,143 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 2142 transitions. [2023-11-29 07:03:09,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2023-11-29 07:03:09,147 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:09,147 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:09,154 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 07:03:09,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 07:03:09,349 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:09,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:09,349 INFO L85 PathProgramCache]: Analyzing trace with hash 2021224875, now seen corresponding path program 1 times [2023-11-29 07:03:09,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:09,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890087734] [2023-11-29 07:03:09,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:09,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:09,416 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:09,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [479721867] [2023-11-29 07:03:09,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:09,417 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:09,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:09,418 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:09,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 07:03:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:09,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 07:03:09,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-29 07:03:09,846 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:03:09,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:09,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890087734] [2023-11-29 07:03:09,846 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:09,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479721867] [2023-11-29 07:03:09,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479721867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:03:09,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:03:09,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 07:03:09,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568824670] [2023-11-29 07:03:09,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:03:09,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:03:09,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:09,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:03:09,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:03:09,849 INFO L87 Difference]: Start difference. First operand 1288 states and 2142 transitions. Second operand has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:10,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:10,447 INFO L93 Difference]: Finished difference Result 3820 states and 6320 transitions. [2023-11-29 07:03:10,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 07:03:10,449 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 468 [2023-11-29 07:03:10,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:10,466 INFO L225 Difference]: With dead ends: 3820 [2023-11-29 07:03:10,466 INFO L226 Difference]: Without dead ends: 2517 [2023-11-29 07:03:10,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 466 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 07:03:10,470 INFO L413 NwaCegarLoop]: 493 mSDtfsCounter, 1224 mSDsluCounter, 1210 mSDsCounter, 0 mSdLazyCounter, 264 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1224 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 07:03:10,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1224 Valid, 1703 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 264 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 07:03:10,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2517 states. [2023-11-29 07:03:10,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2517 to 1325. [2023-11-29 07:03:10,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1189 states have (on average 1.6324642556770395) internal successors, (1941), 1191 states have internal predecessors, (1941), 130 states have call successors, (130), 5 states have call predecessors, (130), 5 states have return successors, (130), 128 states have call predecessors, (130), 130 states have call successors, (130) [2023-11-29 07:03:10,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 2201 transitions. [2023-11-29 07:03:10,568 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 2201 transitions. Word has length 468 [2023-11-29 07:03:10,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:10,569 INFO L495 AbstractCegarLoop]: Abstraction has 1325 states and 2201 transitions. [2023-11-29 07:03:10,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.25) internal successors, (141), 4 states have internal predecessors, (141), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:10,569 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 2201 transitions. [2023-11-29 07:03:10,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2023-11-29 07:03:10,575 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:10,576 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:10,584 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 07:03:10,776 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 07:03:10,777 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:10,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:10,777 INFO L85 PathProgramCache]: Analyzing trace with hash 2056957967, now seen corresponding path program 1 times [2023-11-29 07:03:10,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:10,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529896713] [2023-11-29 07:03:10,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:10,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:10,839 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:10,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1420446077] [2023-11-29 07:03:10,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:10,840 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:10,840 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:10,841 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:10,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 07:03:11,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:11,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 07:03:11,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:11,566 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 4353 proven. 99 refuted. 0 times theorem prover too weak. 4128 trivial. 0 not checked. [2023-11-29 07:03:11,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:03:11,962 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 96 proven. 99 refuted. 0 times theorem prover too weak. 8385 trivial. 0 not checked. [2023-11-29 07:03:11,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:11,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529896713] [2023-11-29 07:03:11,963 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:11,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420446077] [2023-11-29 07:03:11,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420446077] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:03:11,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:03:11,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 07:03:11,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513274528] [2023-11-29 07:03:11,964 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:03:11,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 07:03:11,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:11,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 07:03:11,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 07:03:11,966 INFO L87 Difference]: Start difference. First operand 1325 states and 2201 transitions. Second operand has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 2 states have call successors, (99), 2 states have call predecessors, (99), 4 states have return successors, (100), 2 states have call predecessors, (100), 2 states have call successors, (100) [2023-11-29 07:03:12,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:12,418 INFO L93 Difference]: Finished difference Result 2667 states and 4417 transitions. [2023-11-29 07:03:12,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 07:03:12,419 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 2 states have call successors, (99), 2 states have call predecessors, (99), 4 states have return successors, (100), 2 states have call predecessors, (100), 2 states have call successors, (100) Word has length 468 [2023-11-29 07:03:12,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:12,429 INFO L225 Difference]: With dead ends: 2667 [2023-11-29 07:03:12,429 INFO L226 Difference]: Without dead ends: 1343 [2023-11-29 07:03:12,432 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 938 GetRequests, 928 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 07:03:12,433 INFO L413 NwaCegarLoop]: 389 mSDtfsCounter, 280 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 312 SdHoareTripleChecker+Valid, 1033 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 07:03:12,433 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [312 Valid, 1033 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 07:03:12,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1343 states. [2023-11-29 07:03:12,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1343 to 1333. [2023-11-29 07:03:12,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1333 states, 1195 states have (on average 1.6158995815899582) internal successors, (1931), 1197 states have internal predecessors, (1931), 130 states have call successors, (130), 7 states have call predecessors, (130), 7 states have return successors, (130), 128 states have call predecessors, (130), 130 states have call successors, (130) [2023-11-29 07:03:12,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1333 states to 1333 states and 2191 transitions. [2023-11-29 07:03:12,530 INFO L78 Accepts]: Start accepts. Automaton has 1333 states and 2191 transitions. Word has length 468 [2023-11-29 07:03:12,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:12,531 INFO L495 AbstractCegarLoop]: Abstraction has 1333 states and 2191 transitions. [2023-11-29 07:03:12,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 2 states have call successors, (99), 2 states have call predecessors, (99), 4 states have return successors, (100), 2 states have call predecessors, (100), 2 states have call successors, (100) [2023-11-29 07:03:12,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1333 states and 2191 transitions. [2023-11-29 07:03:12,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 469 [2023-11-29 07:03:12,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:12,540 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:12,549 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 07:03:12,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 07:03:12,745 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:12,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:12,746 INFO L85 PathProgramCache]: Analyzing trace with hash -2120793753, now seen corresponding path program 1 times [2023-11-29 07:03:12,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:12,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607184126] [2023-11-29 07:03:12,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:12,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:12,831 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:12,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [423240509] [2023-11-29 07:03:12,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:12,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:12,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:12,833 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:12,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 07:03:13,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:13,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 1192 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 07:03:13,215 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:13,324 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-29 07:03:13,324 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:03:13,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:13,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607184126] [2023-11-29 07:03:13,324 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:13,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423240509] [2023-11-29 07:03:13,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423240509] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:03:13,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:03:13,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:03:13,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600215084] [2023-11-29 07:03:13,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:03:13,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 07:03:13,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:13,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 07:03:13,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 07:03:13,327 INFO L87 Difference]: Start difference. First operand 1333 states and 2191 transitions. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:13,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:13,452 INFO L93 Difference]: Finished difference Result 3108 states and 5069 transitions. [2023-11-29 07:03:13,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 07:03:13,453 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 468 [2023-11-29 07:03:13,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:13,466 INFO L225 Difference]: With dead ends: 3108 [2023-11-29 07:03:13,466 INFO L226 Difference]: Without dead ends: 1750 [2023-11-29 07:03:13,469 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 467 GetRequests, 466 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 07:03:13,470 INFO L413 NwaCegarLoop]: 868 mSDtfsCounter, 394 mSDsluCounter, 451 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 07:03:13,470 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [394 Valid, 1319 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 07:03:13,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2023-11-29 07:03:13,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1314. [2023-11-29 07:03:13,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1314 states, 1176 states have (on average 1.6045918367346939) internal successors, (1887), 1178 states have internal predecessors, (1887), 130 states have call successors, (130), 7 states have call predecessors, (130), 7 states have return successors, (130), 128 states have call predecessors, (130), 130 states have call successors, (130) [2023-11-29 07:03:13,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1314 states to 1314 states and 2147 transitions. [2023-11-29 07:03:13,577 INFO L78 Accepts]: Start accepts. Automaton has 1314 states and 2147 transitions. Word has length 468 [2023-11-29 07:03:13,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:13,578 INFO L495 AbstractCegarLoop]: Abstraction has 1314 states and 2147 transitions. [2023-11-29 07:03:13,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:13,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1314 states and 2147 transitions. [2023-11-29 07:03:13,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2023-11-29 07:03:13,584 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:13,584 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:13,593 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 07:03:13,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:13,789 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:13,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:13,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1121486370, now seen corresponding path program 1 times [2023-11-29 07:03:13,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:13,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348616961] [2023-11-29 07:03:13,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:13,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:13,849 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:13,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1344853930] [2023-11-29 07:03:13,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:13,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:13,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:13,850 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:13,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 07:03:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:14,168 INFO L262 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-29 07:03:14,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:15,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-29 07:03:15,320 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:03:15,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:15,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348616961] [2023-11-29 07:03:15,321 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:15,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344853930] [2023-11-29 07:03:15,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344853930] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:03:15,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:03:15,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:03:15,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248311573] [2023-11-29 07:03:15,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:03:15,322 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:03:15,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:15,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:03:15,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:03:15,324 INFO L87 Difference]: Start difference. First operand 1314 states and 2147 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:15,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:15,599 INFO L93 Difference]: Finished difference Result 3753 states and 6142 transitions. [2023-11-29 07:03:15,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 07:03:15,600 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 469 [2023-11-29 07:03:15,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:15,611 INFO L225 Difference]: With dead ends: 3753 [2023-11-29 07:03:15,611 INFO L226 Difference]: Without dead ends: 2440 [2023-11-29 07:03:15,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 466 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 07:03:15,615 INFO L413 NwaCegarLoop]: 608 mSDtfsCounter, 533 mSDsluCounter, 936 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 1544 SdHoareTripleChecker+Invalid, 148 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 07:03:15,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 1544 Invalid, 148 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 07:03:15,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2440 states. [2023-11-29 07:03:15,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2440 to 1455. [2023-11-29 07:03:15,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1455 states, 1247 states have (on average 1.5829991980753808) internal successors, (1974), 1249 states have internal predecessors, (1974), 196 states have call successors, (196), 11 states have call predecessors, (196), 11 states have return successors, (196), 194 states have call predecessors, (196), 196 states have call successors, (196) [2023-11-29 07:03:15,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1455 states to 1455 states and 2366 transitions. [2023-11-29 07:03:15,738 INFO L78 Accepts]: Start accepts. Automaton has 1455 states and 2366 transitions. Word has length 469 [2023-11-29 07:03:15,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:15,738 INFO L495 AbstractCegarLoop]: Abstraction has 1455 states and 2366 transitions. [2023-11-29 07:03:15,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:15,739 INFO L276 IsEmpty]: Start isEmpty. Operand 1455 states and 2366 transitions. [2023-11-29 07:03:15,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2023-11-29 07:03:15,744 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:15,744 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:15,753 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-29 07:03:15,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 07:03:15,945 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:15,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:15,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1760957765, now seen corresponding path program 1 times [2023-11-29 07:03:15,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:15,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361681335] [2023-11-29 07:03:15,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:15,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:16,003 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:16,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570446228] [2023-11-29 07:03:16,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:16,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:16,004 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:16,005 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:16,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 07:03:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:16,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 1194 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 07:03:16,337 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:16,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-29 07:03:16,746 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:03:16,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:16,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361681335] [2023-11-29 07:03:16,746 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:16,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570446228] [2023-11-29 07:03:16,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570446228] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:03:16,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:03:16,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 07:03:16,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46403157] [2023-11-29 07:03:16,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:03:16,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 07:03:16,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:16,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 07:03:16,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 07:03:16,749 INFO L87 Difference]: Start difference. First operand 1455 states and 2366 transitions. Second operand has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:17,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:17,441 INFO L93 Difference]: Finished difference Result 6567 states and 10672 transitions. [2023-11-29 07:03:17,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 07:03:17,442 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 469 [2023-11-29 07:03:17,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:17,473 INFO L225 Difference]: With dead ends: 6567 [2023-11-29 07:03:17,473 INFO L226 Difference]: Without dead ends: 5254 [2023-11-29 07:03:17,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 464 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-29 07:03:17,479 INFO L413 NwaCegarLoop]: 814 mSDtfsCounter, 2311 mSDsluCounter, 1887 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2311 SdHoareTripleChecker+Valid, 2701 SdHoareTripleChecker+Invalid, 376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 07:03:17,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2311 Valid, 2701 Invalid, 376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 07:03:17,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5254 states. [2023-11-29 07:03:17,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5254 to 2722. [2023-11-29 07:03:17,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2377 states have (on average 1.56541859486748) internal successors, (3721), 2381 states have internal predecessors, (3721), 326 states have call successors, (326), 18 states have call predecessors, (326), 18 states have return successors, (326), 322 states have call predecessors, (326), 326 states have call successors, (326) [2023-11-29 07:03:17,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 4373 transitions. [2023-11-29 07:03:17,747 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 4373 transitions. Word has length 469 [2023-11-29 07:03:17,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:17,748 INFO L495 AbstractCegarLoop]: Abstraction has 2722 states and 4373 transitions. [2023-11-29 07:03:17,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 23.666666666666668) internal successors, (142), 5 states have internal predecessors, (142), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:17,748 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 4373 transitions. [2023-11-29 07:03:17,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2023-11-29 07:03:17,754 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:17,754 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:17,763 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 07:03:17,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:17,955 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:17,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:17,956 INFO L85 PathProgramCache]: Analyzing trace with hash 484621689, now seen corresponding path program 1 times [2023-11-29 07:03:17,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:17,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555393012] [2023-11-29 07:03:17,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:17,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:18,022 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:18,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [109811504] [2023-11-29 07:03:18,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:18,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:18,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:18,023 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:18,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 07:03:18,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:18,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 1195 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 07:03:18,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:18,933 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-29 07:03:18,933 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:03:18,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:18,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555393012] [2023-11-29 07:03:18,933 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:18,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109811504] [2023-11-29 07:03:18,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109811504] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:03:18,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:03:18,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2023-11-29 07:03:18,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778519349] [2023-11-29 07:03:18,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:03:18,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 07:03:18,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:18,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 07:03:18,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2023-11-29 07:03:18,936 INFO L87 Difference]: Start difference. First operand 2722 states and 4373 transitions. Second operand has 11 states, 11 states have (on average 12.909090909090908) internal successors, (142), 10 states have internal predecessors, (142), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:21,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:21,530 INFO L93 Difference]: Finished difference Result 13021 states and 20644 transitions. [2023-11-29 07:03:21,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 07:03:21,531 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 12.909090909090908) internal successors, (142), 10 states have internal predecessors, (142), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 469 [2023-11-29 07:03:21,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:21,576 INFO L225 Difference]: With dead ends: 13021 [2023-11-29 07:03:21,576 INFO L226 Difference]: Without dead ends: 10441 [2023-11-29 07:03:21,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2023-11-29 07:03:21,584 INFO L413 NwaCegarLoop]: 938 mSDtfsCounter, 3098 mSDsluCounter, 4433 mSDsCounter, 0 mSdLazyCounter, 2352 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3098 SdHoareTripleChecker+Valid, 5371 SdHoareTripleChecker+Invalid, 2466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 2352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 07:03:21,584 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3098 Valid, 5371 Invalid, 2466 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 2352 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 07:03:21,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10441 states. [2023-11-29 07:03:22,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10441 to 7563. [2023-11-29 07:03:22,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7563 states, 6802 states have (on average 1.5554248750367539) internal successors, (10580), 6822 states have internal predecessors, (10580), 712 states have call successors, (712), 48 states have call predecessors, (712), 48 states have return successors, (712), 692 states have call predecessors, (712), 712 states have call successors, (712) [2023-11-29 07:03:22,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7563 states to 7563 states and 12004 transitions. [2023-11-29 07:03:22,125 INFO L78 Accepts]: Start accepts. Automaton has 7563 states and 12004 transitions. Word has length 469 [2023-11-29 07:03:22,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:22,126 INFO L495 AbstractCegarLoop]: Abstraction has 7563 states and 12004 transitions. [2023-11-29 07:03:22,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.909090909090908) internal successors, (142), 10 states have internal predecessors, (142), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:22,127 INFO L276 IsEmpty]: Start isEmpty. Operand 7563 states and 12004 transitions. [2023-11-29 07:03:22,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 470 [2023-11-29 07:03:22,135 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:22,136 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:22,144 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 07:03:22,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 07:03:22,336 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:22,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:22,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1543964421, now seen corresponding path program 1 times [2023-11-29 07:03:22,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:22,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204354786] [2023-11-29 07:03:22,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:22,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:22,403 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:22,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [673256896] [2023-11-29 07:03:22,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:22,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:22,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:22,405 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:22,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 07:03:22,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:22,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 1195 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 07:03:22,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:22,987 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 2375 proven. 30 refuted. 0 times theorem prover too weak. 6175 trivial. 0 not checked. [2023-11-29 07:03:22,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:03:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 165 proven. 30 refuted. 0 times theorem prover too weak. 8385 trivial. 0 not checked. [2023-11-29 07:03:23,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:23,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204354786] [2023-11-29 07:03:23,298 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:23,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673256896] [2023-11-29 07:03:23,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [673256896] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:03:23,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:03:23,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-29 07:03:23,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970195354] [2023-11-29 07:03:23,299 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:03:23,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 07:03:23,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:23,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 07:03:23,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 07:03:23,302 INFO L87 Difference]: Start difference. First operand 7563 states and 12004 transitions. Second operand has 8 states, 8 states have (on average 28.875) internal successors, (231), 8 states have internal predecessors, (231), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-11-29 07:03:23,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:23,896 INFO L93 Difference]: Finished difference Result 15060 states and 23859 transitions. [2023-11-29 07:03:23,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 07:03:23,897 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 28.875) internal successors, (231), 8 states have internal predecessors, (231), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) Word has length 469 [2023-11-29 07:03:23,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:23,941 INFO L225 Difference]: With dead ends: 15060 [2023-11-29 07:03:23,941 INFO L226 Difference]: Without dead ends: 7639 [2023-11-29 07:03:23,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 940 GetRequests, 930 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 07:03:23,948 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 317 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 1045 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 07:03:23,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [372 Valid, 1045 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 07:03:23,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7639 states. [2023-11-29 07:03:24,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7639 to 7583. [2023-11-29 07:03:24,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7583 states, 6817 states have (on average 1.5471615079947192) internal successors, (10547), 6837 states have internal predecessors, (10547), 712 states have call successors, (712), 53 states have call predecessors, (712), 53 states have return successors, (712), 692 states have call predecessors, (712), 712 states have call successors, (712) [2023-11-29 07:03:24,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7583 states to 7583 states and 11971 transitions. [2023-11-29 07:03:24,459 INFO L78 Accepts]: Start accepts. Automaton has 7583 states and 11971 transitions. Word has length 469 [2023-11-29 07:03:24,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:24,460 INFO L495 AbstractCegarLoop]: Abstraction has 7583 states and 11971 transitions. [2023-11-29 07:03:24,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 28.875) internal successors, (231), 8 states have internal predecessors, (231), 3 states have call successors, (76), 2 states have call predecessors, (76), 4 states have return successors, (77), 3 states have call predecessors, (77), 3 states have call successors, (77) [2023-11-29 07:03:24,461 INFO L276 IsEmpty]: Start isEmpty. Operand 7583 states and 11971 transitions. [2023-11-29 07:03:24,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2023-11-29 07:03:24,470 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:24,470 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:24,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 07:03:24,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 07:03:24,671 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:24,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:24,671 INFO L85 PathProgramCache]: Analyzing trace with hash -1645391522, now seen corresponding path program 1 times [2023-11-29 07:03:24,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:24,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981844925] [2023-11-29 07:03:24,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:24,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:24,733 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:24,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1814286897] [2023-11-29 07:03:24,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:24,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:24,734 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:24,735 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:24,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 07:03:25,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:25,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 07:03:25,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 1163 proven. 12 refuted. 0 times theorem prover too weak. 7405 trivial. 0 not checked. [2023-11-29 07:03:25,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:03:25,425 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 183 proven. 12 refuted. 0 times theorem prover too weak. 8385 trivial. 0 not checked. [2023-11-29 07:03:25,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:25,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981844925] [2023-11-29 07:03:25,425 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:25,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814286897] [2023-11-29 07:03:25,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1814286897] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:03:25,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:03:25,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 07:03:25,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172133608] [2023-11-29 07:03:25,426 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:03:25,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 07:03:25,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:25,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 07:03:25,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 07:03:25,428 INFO L87 Difference]: Start difference. First operand 7583 states and 11971 transitions. Second operand has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 2 states have call successors, (70), 2 states have call predecessors, (70), 4 states have return successors, (71), 2 states have call predecessors, (71), 2 states have call successors, (71) [2023-11-29 07:03:26,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:26,024 INFO L93 Difference]: Finished difference Result 15106 states and 23800 transitions. [2023-11-29 07:03:26,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 07:03:26,024 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 2 states have call successors, (70), 2 states have call predecessors, (70), 4 states have return successors, (71), 2 states have call predecessors, (71), 2 states have call successors, (71) Word has length 470 [2023-11-29 07:03:26,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:26,039 INFO L225 Difference]: With dead ends: 15106 [2023-11-29 07:03:26,039 INFO L226 Difference]: Without dead ends: 7669 [2023-11-29 07:03:26,048 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 942 GetRequests, 932 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 07:03:26,048 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 692 mSDsluCounter, 659 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 1056 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 07:03:26,048 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [752 Valid, 1056 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 07:03:26,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7669 states. [2023-11-29 07:03:26,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7669 to 7603. [2023-11-29 07:03:26,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7603 states, 6832 states have (on average 1.5436182669789227) internal successors, (10546), 6852 states have internal predecessors, (10546), 712 states have call successors, (712), 58 states have call predecessors, (712), 58 states have return successors, (712), 692 states have call predecessors, (712), 712 states have call successors, (712) [2023-11-29 07:03:26,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7603 states to 7603 states and 11970 transitions. [2023-11-29 07:03:26,437 INFO L78 Accepts]: Start accepts. Automaton has 7603 states and 11970 transitions. Word has length 470 [2023-11-29 07:03:26,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:26,438 INFO L495 AbstractCegarLoop]: Abstraction has 7603 states and 11970 transitions. [2023-11-29 07:03:26,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 2 states have call successors, (70), 2 states have call predecessors, (70), 4 states have return successors, (71), 2 states have call predecessors, (71), 2 states have call successors, (71) [2023-11-29 07:03:26,439 INFO L276 IsEmpty]: Start isEmpty. Operand 7603 states and 11970 transitions. [2023-11-29 07:03:26,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2023-11-29 07:03:26,449 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:26,449 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:26,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 07:03:26,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 07:03:26,650 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:26,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:26,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1507073308, now seen corresponding path program 1 times [2023-11-29 07:03:26,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:26,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949527262] [2023-11-29 07:03:26,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:26,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:26,728 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:26,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843952491] [2023-11-29 07:03:26,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:26,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:26,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:26,730 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:26,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 07:03:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:27,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 1197 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 07:03:27,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 4343 proven. 102 refuted. 0 times theorem prover too weak. 4135 trivial. 0 not checked. [2023-11-29 07:03:27,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:03:27,546 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 93 proven. 102 refuted. 0 times theorem prover too weak. 8385 trivial. 0 not checked. [2023-11-29 07:03:27,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:27,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949527262] [2023-11-29 07:03:27,546 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:27,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843952491] [2023-11-29 07:03:27,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843952491] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:03:27,546 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:03:27,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 07:03:27,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679175656] [2023-11-29 07:03:27,547 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:03:27,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 07:03:27,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:27,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 07:03:27,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 07:03:27,550 INFO L87 Difference]: Start difference. First operand 7603 states and 11970 transitions. Second operand has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 2 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 2 states have call predecessors, (101), 2 states have call successors, (101) [2023-11-29 07:03:28,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:28,085 INFO L93 Difference]: Finished difference Result 12458 states and 19569 transitions. [2023-11-29 07:03:28,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 07:03:28,086 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 2 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 2 states have call predecessors, (101), 2 states have call successors, (101) Word has length 470 [2023-11-29 07:03:28,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:28,095 INFO L225 Difference]: With dead ends: 12458 [2023-11-29 07:03:28,095 INFO L226 Difference]: Without dead ends: 5005 [2023-11-29 07:03:28,104 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 942 GetRequests, 932 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 07:03:28,104 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 607 mSDsluCounter, 640 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 07:03:28,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 1027 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 07:03:28,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5005 states. [2023-11-29 07:03:28,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5005 to 4939. [2023-11-29 07:03:28,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4939 states, 4321 states have (on average 1.5295070585512613) internal successors, (6609), 4333 states have internal predecessors, (6609), 556 states have call successors, (556), 61 states have call predecessors, (556), 61 states have return successors, (556), 544 states have call predecessors, (556), 556 states have call successors, (556) [2023-11-29 07:03:28,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4939 states to 4939 states and 7721 transitions. [2023-11-29 07:03:28,348 INFO L78 Accepts]: Start accepts. Automaton has 4939 states and 7721 transitions. Word has length 470 [2023-11-29 07:03:28,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:28,349 INFO L495 AbstractCegarLoop]: Abstraction has 4939 states and 7721 transitions. [2023-11-29 07:03:28,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.714285714285715) internal successors, (152), 7 states have internal predecessors, (152), 2 states have call successors, (100), 2 states have call predecessors, (100), 4 states have return successors, (101), 2 states have call predecessors, (101), 2 states have call successors, (101) [2023-11-29 07:03:28,349 INFO L276 IsEmpty]: Start isEmpty. Operand 4939 states and 7721 transitions. [2023-11-29 07:03:28,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 471 [2023-11-29 07:03:28,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:28,354 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:28,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-29 07:03:28,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 07:03:28,554 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:28,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:28,555 INFO L85 PathProgramCache]: Analyzing trace with hash 915623801, now seen corresponding path program 1 times [2023-11-29 07:03:28,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:28,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164168960] [2023-11-29 07:03:28,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:28,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:28,637 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:28,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2017089024] [2023-11-29 07:03:28,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:28,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:28,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:28,639 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:28,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 07:03:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:29,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 1202 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 07:03:29,018 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:29,095 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-29 07:03:29,095 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:03:29,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:29,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164168960] [2023-11-29 07:03:29,095 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:29,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017089024] [2023-11-29 07:03:29,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017089024] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:03:29,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:03:29,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 07:03:29,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010611775] [2023-11-29 07:03:29,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:03:29,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:03:29,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:29,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:03:29,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:03:29,097 INFO L87 Difference]: Start difference. First operand 4939 states and 7721 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:29,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:29,339 INFO L93 Difference]: Finished difference Result 7422 states and 11639 transitions. [2023-11-29 07:03:29,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 07:03:29,340 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 470 [2023-11-29 07:03:29,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:29,345 INFO L225 Difference]: With dead ends: 7422 [2023-11-29 07:03:29,345 INFO L226 Difference]: Without dead ends: 1734 [2023-11-29 07:03:29,351 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 470 GetRequests, 467 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 07:03:29,352 INFO L413 NwaCegarLoop]: 483 mSDtfsCounter, 446 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 1015 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 07:03:29,352 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 1015 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 07:03:29,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1734 states. [2023-11-29 07:03:29,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1734 to 1302. [2023-11-29 07:03:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1082 states have (on average 1.4861367837338262) internal successors, (1608), 1082 states have internal predecessors, (1608), 198 states have call successors, (198), 21 states have call predecessors, (198), 21 states have return successors, (198), 198 states have call predecessors, (198), 198 states have call successors, (198) [2023-11-29 07:03:29,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2004 transitions. [2023-11-29 07:03:29,444 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 2004 transitions. Word has length 470 [2023-11-29 07:03:29,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:29,445 INFO L495 AbstractCegarLoop]: Abstraction has 1302 states and 2004 transitions. [2023-11-29 07:03:29,445 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:29,445 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 2004 transitions. [2023-11-29 07:03:29,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-29 07:03:29,448 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:29,449 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:29,456 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 07:03:29,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 07:03:29,649 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:29,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:29,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1455520354, now seen corresponding path program 1 times [2023-11-29 07:03:29,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:29,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611898760] [2023-11-29 07:03:29,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:29,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:29,713 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:29,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1522941119] [2023-11-29 07:03:29,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:29,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:29,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:29,715 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:29,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 07:03:30,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:30,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 07:03:30,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:30,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-29 07:03:30,122 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:03:30,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:30,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611898760] [2023-11-29 07:03:30,122 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:30,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522941119] [2023-11-29 07:03:30,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1522941119] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:03:30,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:03:30,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 07:03:30,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195459890] [2023-11-29 07:03:30,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:03:30,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:03:30,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:30,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:03:30,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:03:30,125 INFO L87 Difference]: Start difference. First operand 1302 states and 2004 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:30,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:30,235 INFO L93 Difference]: Finished difference Result 2576 states and 3983 transitions. [2023-11-29 07:03:30,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 07:03:30,236 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 471 [2023-11-29 07:03:30,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:30,240 INFO L225 Difference]: With dead ends: 2576 [2023-11-29 07:03:30,240 INFO L226 Difference]: Without dead ends: 1428 [2023-11-29 07:03:30,242 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 471 GetRequests, 468 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 07:03:30,243 INFO L413 NwaCegarLoop]: 516 mSDtfsCounter, 131 mSDsluCounter, 841 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 1357 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 07:03:30,243 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 1357 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 07:03:30,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2023-11-29 07:03:30,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1302. [2023-11-29 07:03:30,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1082 states have (on average 1.4824399260628467) internal successors, (1604), 1082 states have internal predecessors, (1604), 198 states have call successors, (198), 21 states have call predecessors, (198), 21 states have return successors, (198), 198 states have call predecessors, (198), 198 states have call successors, (198) [2023-11-29 07:03:30,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 2000 transitions. [2023-11-29 07:03:30,332 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 2000 transitions. Word has length 471 [2023-11-29 07:03:30,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:30,332 INFO L495 AbstractCegarLoop]: Abstraction has 1302 states and 2000 transitions. [2023-11-29 07:03:30,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:30,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 2000 transitions. [2023-11-29 07:03:30,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 472 [2023-11-29 07:03:30,336 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:30,337 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:30,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-29 07:03:30,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 07:03:30,537 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:30,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:30,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1356791565, now seen corresponding path program 1 times [2023-11-29 07:03:30,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:30,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243483645] [2023-11-29 07:03:30,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:30,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:30,591 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:30,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [119407936] [2023-11-29 07:03:30,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:30,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:30,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:30,593 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:30,597 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 07:03:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:30,989 INFO L262 TraceCheckSpWp]: Trace formula consists of 1196 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 07:03:30,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:31,216 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 4335 proven. 90 refuted. 0 times theorem prover too weak. 4155 trivial. 0 not checked. [2023-11-29 07:03:31,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:03:31,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 105 proven. 90 refuted. 0 times theorem prover too weak. 8385 trivial. 0 not checked. [2023-11-29 07:03:31,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:31,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243483645] [2023-11-29 07:03:31,415 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:31,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119407936] [2023-11-29 07:03:31,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119407936] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:03:31,415 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:03:31,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 07:03:31,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731936897] [2023-11-29 07:03:31,416 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:03:31,417 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 07:03:31,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:31,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 07:03:31,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 07:03:31,418 INFO L87 Difference]: Start difference. First operand 1302 states and 2000 transitions. Second operand has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 2 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 2 states have call predecessors, (97), 2 states have call successors, (97) [2023-11-29 07:03:31,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:31,910 INFO L93 Difference]: Finished difference Result 2214 states and 3382 transitions. [2023-11-29 07:03:31,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 07:03:31,911 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 2 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 2 states have call predecessors, (97), 2 states have call successors, (97) Word has length 471 [2023-11-29 07:03:31,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:31,914 INFO L225 Difference]: With dead ends: 2214 [2023-11-29 07:03:31,914 INFO L226 Difference]: Without dead ends: 1025 [2023-11-29 07:03:31,916 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 944 GetRequests, 934 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 07:03:31,916 INFO L413 NwaCegarLoop]: 369 mSDtfsCounter, 896 mSDsluCounter, 603 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 930 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 539 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 07:03:31,917 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [930 Valid, 972 Invalid, 539 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 07:03:31,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1025 states. [2023-11-29 07:03:32,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1025 to 969. [2023-11-29 07:03:32,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 969 states, 746 states have (on average 1.4289544235924934) internal successors, (1066), 746 states have internal predecessors, (1066), 198 states have call successors, (198), 24 states have call predecessors, (198), 24 states have return successors, (198), 198 states have call predecessors, (198), 198 states have call successors, (198) [2023-11-29 07:03:32,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 969 states to 969 states and 1462 transitions. [2023-11-29 07:03:32,086 INFO L78 Accepts]: Start accepts. Automaton has 969 states and 1462 transitions. Word has length 471 [2023-11-29 07:03:32,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:32,087 INFO L495 AbstractCegarLoop]: Abstraction has 969 states and 1462 transitions. [2023-11-29 07:03:32,087 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 2 states have call successors, (96), 2 states have call predecessors, (96), 4 states have return successors, (97), 2 states have call predecessors, (97), 2 states have call successors, (97) [2023-11-29 07:03:32,087 INFO L276 IsEmpty]: Start isEmpty. Operand 969 states and 1462 transitions. [2023-11-29 07:03:32,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 473 [2023-11-29 07:03:32,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:32,092 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:32,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 07:03:32,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 07:03:32,298 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:32,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:32,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1378625560, now seen corresponding path program 1 times [2023-11-29 07:03:32,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:32,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633704933] [2023-11-29 07:03:32,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:32,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:32,360 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:32,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [208496366] [2023-11-29 07:03:32,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:32,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:32,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:32,361 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:32,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 07:03:32,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:32,768 INFO L262 TraceCheckSpWp]: Trace formula consists of 1205 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 07:03:32,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:34,006 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-29 07:03:34,006 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:03:34,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:34,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633704933] [2023-11-29 07:03:34,007 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:34,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208496366] [2023-11-29 07:03:34,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [208496366] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:03:34,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:03:34,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 07:03:34,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908419104] [2023-11-29 07:03:34,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:03:34,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 07:03:34,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:34,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 07:03:34,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 07:03:34,010 INFO L87 Difference]: Start difference. First operand 969 states and 1462 transitions. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:34,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:34,464 INFO L93 Difference]: Finished difference Result 2363 states and 3581 transitions. [2023-11-29 07:03:34,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 07:03:34,464 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 472 [2023-11-29 07:03:34,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:34,468 INFO L225 Difference]: With dead ends: 2363 [2023-11-29 07:03:34,468 INFO L226 Difference]: Without dead ends: 1534 [2023-11-29 07:03:34,470 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 07:03:34,470 INFO L413 NwaCegarLoop]: 604 mSDtfsCounter, 750 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 07:03:34,471 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [750 Valid, 1858 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 07:03:34,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1534 states. [2023-11-29 07:03:34,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1534 to 1369. [2023-11-29 07:03:34,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1072 states have (on average 1.4337686567164178) internal successors, (1537), 1072 states have internal predecessors, (1537), 264 states have call successors, (264), 32 states have call predecessors, (264), 32 states have return successors, (264), 264 states have call predecessors, (264), 264 states have call successors, (264) [2023-11-29 07:03:34,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2065 transitions. [2023-11-29 07:03:34,592 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2065 transitions. Word has length 472 [2023-11-29 07:03:34,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:34,592 INFO L495 AbstractCegarLoop]: Abstraction has 1369 states and 2065 transitions. [2023-11-29 07:03:34,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:34,592 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2065 transitions. [2023-11-29 07:03:34,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2023-11-29 07:03:34,595 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:34,595 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:34,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 07:03:34,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:34,796 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:34,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:34,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1375001796, now seen corresponding path program 1 times [2023-11-29 07:03:34,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:34,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845424594] [2023-11-29 07:03:34,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:34,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:34,845 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:34,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1100131553] [2023-11-29 07:03:34,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:34,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:34,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:34,846 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:34,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 07:03:35,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:35,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 1203 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 07:03:35,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-29 07:03:36,085 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:03:36,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:36,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845424594] [2023-11-29 07:03:36,085 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:36,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100131553] [2023-11-29 07:03:36,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100131553] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:03:36,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:03:36,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 07:03:36,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302016693] [2023-11-29 07:03:36,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:03:36,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 07:03:36,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:36,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 07:03:36,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 07:03:36,087 INFO L87 Difference]: Start difference. First operand 1369 states and 2065 transitions. Second operand has 4 states, 4 states have (on average 36.5) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:36,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:36,412 INFO L93 Difference]: Finished difference Result 2856 states and 4326 transitions. [2023-11-29 07:03:36,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 07:03:36,413 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 473 [2023-11-29 07:03:36,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:36,416 INFO L225 Difference]: With dead ends: 2856 [2023-11-29 07:03:36,416 INFO L226 Difference]: Without dead ends: 1627 [2023-11-29 07:03:36,418 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 470 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 07:03:36,418 INFO L413 NwaCegarLoop]: 447 mSDtfsCounter, 349 mSDsluCounter, 878 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 1325 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 07:03:36,419 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 1325 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 07:03:36,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1627 states. [2023-11-29 07:03:36,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1627 to 1369. [2023-11-29 07:03:36,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1369 states, 1072 states have (on average 1.4328358208955223) internal successors, (1536), 1072 states have internal predecessors, (1536), 264 states have call successors, (264), 32 states have call predecessors, (264), 32 states have return successors, (264), 264 states have call predecessors, (264), 264 states have call successors, (264) [2023-11-29 07:03:36,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1369 states to 1369 states and 2064 transitions. [2023-11-29 07:03:36,563 INFO L78 Accepts]: Start accepts. Automaton has 1369 states and 2064 transitions. Word has length 473 [2023-11-29 07:03:36,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:36,563 INFO L495 AbstractCegarLoop]: Abstraction has 1369 states and 2064 transitions. [2023-11-29 07:03:36,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.5) internal successors, (146), 3 states have internal predecessors, (146), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:36,563 INFO L276 IsEmpty]: Start isEmpty. Operand 1369 states and 2064 transitions. [2023-11-29 07:03:36,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 474 [2023-11-29 07:03:36,567 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:36,567 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:36,574 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-29 07:03:36,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:36,768 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:36,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:36,768 INFO L85 PathProgramCache]: Analyzing trace with hash 491706878, now seen corresponding path program 1 times [2023-11-29 07:03:36,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:36,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146667978] [2023-11-29 07:03:36,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:36,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:36,829 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:36,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1416292116] [2023-11-29 07:03:36,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:36,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:36,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:36,831 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:36,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 07:03:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:37,291 INFO L262 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 07:03:37,296 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:37,804 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-29 07:03:37,804 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:03:37,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:37,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146667978] [2023-11-29 07:03:37,805 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:37,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416292116] [2023-11-29 07:03:37,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416292116] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:03:37,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:03:37,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 07:03:37,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439613198] [2023-11-29 07:03:37,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:03:37,806 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 07:03:37,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:37,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 07:03:37,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-29 07:03:37,807 INFO L87 Difference]: Start difference. First operand 1369 states and 2064 transitions. Second operand has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 5 states have internal predecessors, (146), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:38,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:38,397 INFO L93 Difference]: Finished difference Result 3853 states and 5805 transitions. [2023-11-29 07:03:38,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 07:03:38,397 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 5 states have internal predecessors, (146), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 473 [2023-11-29 07:03:38,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:38,401 INFO L225 Difference]: With dead ends: 3853 [2023-11-29 07:03:38,402 INFO L226 Difference]: Without dead ends: 2633 [2023-11-29 07:03:38,404 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 468 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-29 07:03:38,405 INFO L413 NwaCegarLoop]: 444 mSDtfsCounter, 2262 mSDsluCounter, 1006 mSDsCounter, 0 mSdLazyCounter, 62 mSolverCounterSat, 498 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2262 SdHoareTripleChecker+Valid, 1450 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 498 IncrementalHoareTripleChecker+Valid, 62 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 07:03:38,405 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2262 Valid, 1450 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [498 Valid, 62 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 07:03:38,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2633 states. [2023-11-29 07:03:38,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2633 to 1439. [2023-11-29 07:03:38,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1138 states have (on average 1.4182776801405976) internal successors, (1614), 1138 states have internal predecessors, (1614), 264 states have call successors, (264), 36 states have call predecessors, (264), 36 states have return successors, (264), 264 states have call predecessors, (264), 264 states have call successors, (264) [2023-11-29 07:03:38,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 2142 transitions. [2023-11-29 07:03:38,544 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 2142 transitions. Word has length 473 [2023-11-29 07:03:38,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:38,545 INFO L495 AbstractCegarLoop]: Abstraction has 1439 states and 2142 transitions. [2023-11-29 07:03:38,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 5 states have internal predecessors, (146), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:38,545 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 2142 transitions. [2023-11-29 07:03:38,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2023-11-29 07:03:38,548 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:38,548 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:38,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-29 07:03:38,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:38,749 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:38,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:38,749 INFO L85 PathProgramCache]: Analyzing trace with hash 1254600026, now seen corresponding path program 1 times [2023-11-29 07:03:38,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:38,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359410734] [2023-11-29 07:03:38,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:38,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:38,822 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:38,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1790631057] [2023-11-29 07:03:38,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:38,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:38,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:38,823 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:38,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 07:03:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:39,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 1205 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 07:03:39,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:39,463 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-29 07:03:39,463 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:03:39,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:39,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359410734] [2023-11-29 07:03:39,463 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:39,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790631057] [2023-11-29 07:03:39,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790631057] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:03:39,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:03:39,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 07:03:39,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919588355] [2023-11-29 07:03:39,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:03:39,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 07:03:39,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:39,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 07:03:39,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-29 07:03:39,466 INFO L87 Difference]: Start difference. First operand 1439 states and 2142 transitions. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:41,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:41,668 INFO L93 Difference]: Finished difference Result 7381 states and 11122 transitions. [2023-11-29 07:03:41,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 07:03:41,669 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 474 [2023-11-29 07:03:41,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:41,677 INFO L225 Difference]: With dead ends: 7381 [2023-11-29 07:03:41,677 INFO L226 Difference]: Without dead ends: 6517 [2023-11-29 07:03:41,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 502 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=267, Invalid=789, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 07:03:41,681 INFO L413 NwaCegarLoop]: 957 mSDtfsCounter, 3910 mSDsluCounter, 5488 mSDsCounter, 0 mSdLazyCounter, 1596 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3910 SdHoareTripleChecker+Valid, 6445 SdHoareTripleChecker+Invalid, 1865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 07:03:41,681 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3910 Valid, 6445 Invalid, 1865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1596 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 07:03:41,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6517 states. [2023-11-29 07:03:41,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6517 to 4410. [2023-11-29 07:03:41,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4410 states, 3838 states have (on average 1.4702970297029703) internal successors, (5643), 3847 states have internal predecessors, (5643), 498 states have call successors, (498), 73 states have call predecessors, (498), 73 states have return successors, (498), 489 states have call predecessors, (498), 498 states have call successors, (498) [2023-11-29 07:03:41,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4410 states to 4410 states and 6639 transitions. [2023-11-29 07:03:41,981 INFO L78 Accepts]: Start accepts. Automaton has 4410 states and 6639 transitions. Word has length 474 [2023-11-29 07:03:41,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:41,982 INFO L495 AbstractCegarLoop]: Abstraction has 4410 states and 6639 transitions. [2023-11-29 07:03:41,982 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:41,982 INFO L276 IsEmpty]: Start isEmpty. Operand 4410 states and 6639 transitions. [2023-11-29 07:03:41,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2023-11-29 07:03:41,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:41,986 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:41,992 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 07:03:42,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 07:03:42,186 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:42,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:42,187 INFO L85 PathProgramCache]: Analyzing trace with hash 2130619032, now seen corresponding path program 1 times [2023-11-29 07:03:42,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:42,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559604568] [2023-11-29 07:03:42,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:42,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:42,237 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:42,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1036788914] [2023-11-29 07:03:42,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:42,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:42,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:42,238 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:42,241 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 07:03:42,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:42,689 INFO L262 TraceCheckSpWp]: Trace formula consists of 1205 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 07:03:42,695 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:42,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8580 trivial. 0 not checked. [2023-11-29 07:03:42,829 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:03:42,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:42,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559604568] [2023-11-29 07:03:42,829 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:42,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036788914] [2023-11-29 07:03:42,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036788914] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:03:42,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:03:42,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2023-11-29 07:03:42,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022417585] [2023-11-29 07:03:42,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:03:42,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 07:03:42,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:42,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 07:03:42,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2023-11-29 07:03:42,832 INFO L87 Difference]: Start difference. First operand 4410 states and 6639 transitions. Second operand has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:44,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:44,913 INFO L93 Difference]: Finished difference Result 10129 states and 15266 transitions. [2023-11-29 07:03:44,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2023-11-29 07:03:44,914 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) Word has length 474 [2023-11-29 07:03:44,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:44,921 INFO L225 Difference]: With dead ends: 10129 [2023-11-29 07:03:44,922 INFO L226 Difference]: Without dead ends: 6525 [2023-11-29 07:03:44,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 507 GetRequests, 471 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=342, Invalid=1064, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 07:03:44,926 INFO L413 NwaCegarLoop]: 1110 mSDtfsCounter, 3267 mSDsluCounter, 5545 mSDsCounter, 0 mSdLazyCounter, 1656 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3267 SdHoareTripleChecker+Valid, 6655 SdHoareTripleChecker+Invalid, 1913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 1656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 07:03:44,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3267 Valid, 6655 Invalid, 1913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 1656 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 07:03:44,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6525 states. [2023-11-29 07:03:45,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6525 to 4480. [2023-11-29 07:03:45,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4480 states, 3872 states have (on average 1.4641012396694215) internal successors, (5669), 3881 states have internal predecessors, (5669), 530 states have call successors, (530), 77 states have call predecessors, (530), 77 states have return successors, (530), 521 states have call predecessors, (530), 530 states have call successors, (530) [2023-11-29 07:03:45,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4480 states to 4480 states and 6729 transitions. [2023-11-29 07:03:45,234 INFO L78 Accepts]: Start accepts. Automaton has 4480 states and 6729 transitions. Word has length 474 [2023-11-29 07:03:45,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:45,234 INFO L495 AbstractCegarLoop]: Abstraction has 4480 states and 6729 transitions. [2023-11-29 07:03:45,235 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.363636363636363) internal successors, (147), 11 states have internal predecessors, (147), 1 states have call successors, (66), 1 states have call predecessors, (66), 1 states have return successors, (66), 1 states have call predecessors, (66), 1 states have call successors, (66) [2023-11-29 07:03:45,235 INFO L276 IsEmpty]: Start isEmpty. Operand 4480 states and 6729 transitions. [2023-11-29 07:03:45,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2023-11-29 07:03:45,238 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:45,239 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:45,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 07:03:45,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:45,439 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:45,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:45,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1688329112, now seen corresponding path program 1 times [2023-11-29 07:03:45,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:45,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207461695] [2023-11-29 07:03:45,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:45,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:45,488 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:45,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1504716040] [2023-11-29 07:03:45,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:45,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:45,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:45,490 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:45,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 07:03:45,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:45,883 INFO L262 TraceCheckSpWp]: Trace formula consists of 1203 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 07:03:45,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:46,817 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 2912 proven. 0 refuted. 0 times theorem prover too weak. 5668 trivial. 0 not checked. [2023-11-29 07:03:46,817 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 07:03:46,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:46,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207461695] [2023-11-29 07:03:46,817 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:46,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504716040] [2023-11-29 07:03:46,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504716040] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 07:03:46,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 07:03:46,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 07:03:46,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662417777] [2023-11-29 07:03:46,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 07:03:46,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 07:03:46,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:46,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 07:03:46,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 07:03:46,820 INFO L87 Difference]: Start difference. First operand 4480 states and 6729 transitions. Second operand has 6 states, 6 states have (on average 25.0) internal successors, (150), 5 states have internal predecessors, (150), 2 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (66), 2 states have call predecessors, (66), 2 states have call successors, (66) [2023-11-29 07:03:47,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:47,734 INFO L93 Difference]: Finished difference Result 10808 states and 16290 transitions. [2023-11-29 07:03:47,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 07:03:47,735 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 5 states have internal predecessors, (150), 2 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (66), 2 states have call predecessors, (66), 2 states have call successors, (66) Word has length 474 [2023-11-29 07:03:47,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:47,744 INFO L225 Difference]: With dead ends: 10808 [2023-11-29 07:03:47,744 INFO L226 Difference]: Without dead ends: 6481 [2023-11-29 07:03:47,750 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 475 GetRequests, 469 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2023-11-29 07:03:47,751 INFO L413 NwaCegarLoop]: 809 mSDtfsCounter, 1026 mSDsluCounter, 1549 mSDsCounter, 0 mSdLazyCounter, 543 mSolverCounterSat, 112 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1026 SdHoareTripleChecker+Valid, 2358 SdHoareTripleChecker+Invalid, 655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 112 IncrementalHoareTripleChecker+Valid, 543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 07:03:47,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1026 Valid, 2358 Invalid, 655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [112 Valid, 543 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 07:03:47,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6481 states. [2023-11-29 07:03:48,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6481 to 6475. [2023-11-29 07:03:48,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6475 states, 5661 states have (on average 1.4734145910616498) internal successors, (8341), 5675 states have internal predecessors, (8341), 712 states have call successors, (712), 101 states have call predecessors, (712), 101 states have return successors, (712), 698 states have call predecessors, (712), 712 states have call successors, (712) [2023-11-29 07:03:48,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6475 states to 6475 states and 9765 transitions. [2023-11-29 07:03:48,166 INFO L78 Accepts]: Start accepts. Automaton has 6475 states and 9765 transitions. Word has length 474 [2023-11-29 07:03:48,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:48,167 INFO L495 AbstractCegarLoop]: Abstraction has 6475 states and 9765 transitions. [2023-11-29 07:03:48,167 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 25.0) internal successors, (150), 5 states have internal predecessors, (150), 2 states have call successors, (66), 2 states have call predecessors, (66), 2 states have return successors, (66), 2 states have call predecessors, (66), 2 states have call successors, (66) [2023-11-29 07:03:48,167 INFO L276 IsEmpty]: Start isEmpty. Operand 6475 states and 9765 transitions. [2023-11-29 07:03:48,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 475 [2023-11-29 07:03:48,173 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:48,174 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:48,180 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 07:03:48,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:48,374 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:48,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:48,375 INFO L85 PathProgramCache]: Analyzing trace with hash 112097560, now seen corresponding path program 1 times [2023-11-29 07:03:48,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:48,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168391020] [2023-11-29 07:03:48,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:48,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:48,433 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:48,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1715390712] [2023-11-29 07:03:48,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:48,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:48,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:48,435 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:48,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 07:03:48,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:48,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 1203 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 07:03:48,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:49,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 3779 proven. 3 refuted. 0 times theorem prover too weak. 4798 trivial. 0 not checked. [2023-11-29 07:03:49,586 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:03:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 192 proven. 3 refuted. 0 times theorem prover too weak. 8385 trivial. 0 not checked. [2023-11-29 07:03:49,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:49,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168391020] [2023-11-29 07:03:49,863 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:49,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715390712] [2023-11-29 07:03:49,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715390712] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:03:49,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:03:49,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-29 07:03:49,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860051071] [2023-11-29 07:03:49,864 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:03:49,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 07:03:49,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:49,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 07:03:49,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-29 07:03:49,866 INFO L87 Difference]: Start difference. First operand 6475 states and 9765 transitions. Second operand has 14 states, 14 states have (on average 14.928571428571429) internal successors, (209), 14 states have internal predecessors, (209), 6 states have call successors, (132), 4 states have call predecessors, (132), 6 states have return successors, (132), 6 states have call predecessors, (132), 6 states have call successors, (132) [2023-11-29 07:03:51,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:51,618 INFO L93 Difference]: Finished difference Result 17736 states and 26862 transitions. [2023-11-29 07:03:51,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 07:03:51,619 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.928571428571429) internal successors, (209), 14 states have internal predecessors, (209), 6 states have call successors, (132), 4 states have call predecessors, (132), 6 states have return successors, (132), 6 states have call predecessors, (132), 6 states have call successors, (132) Word has length 474 [2023-11-29 07:03:51,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:51,633 INFO L225 Difference]: With dead ends: 17736 [2023-11-29 07:03:51,633 INFO L226 Difference]: Without dead ends: 11416 [2023-11-29 07:03:51,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 955 GetRequests, 936 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2023-11-29 07:03:51,642 INFO L413 NwaCegarLoop]: 348 mSDtfsCounter, 2024 mSDsluCounter, 2690 mSDsCounter, 0 mSdLazyCounter, 1445 mSolverCounterSat, 450 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2043 SdHoareTripleChecker+Valid, 3038 SdHoareTripleChecker+Invalid, 1895 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 450 IncrementalHoareTripleChecker+Valid, 1445 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 07:03:51,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2043 Valid, 3038 Invalid, 1895 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [450 Valid, 1445 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 07:03:51,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11416 states. [2023-11-29 07:03:52,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11416 to 6479. [2023-11-29 07:03:52,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6479 states, 5664 states have (on average 1.4728107344632768) internal successors, (8342), 5678 states have internal predecessors, (8342), 712 states have call successors, (712), 102 states have call predecessors, (712), 102 states have return successors, (712), 698 states have call predecessors, (712), 712 states have call successors, (712) [2023-11-29 07:03:52,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6479 states to 6479 states and 9766 transitions. [2023-11-29 07:03:52,244 INFO L78 Accepts]: Start accepts. Automaton has 6479 states and 9766 transitions. Word has length 474 [2023-11-29 07:03:52,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:52,245 INFO L495 AbstractCegarLoop]: Abstraction has 6479 states and 9766 transitions. [2023-11-29 07:03:52,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.928571428571429) internal successors, (209), 14 states have internal predecessors, (209), 6 states have call successors, (132), 4 states have call predecessors, (132), 6 states have return successors, (132), 6 states have call predecessors, (132), 6 states have call successors, (132) [2023-11-29 07:03:52,245 INFO L276 IsEmpty]: Start isEmpty. Operand 6479 states and 9766 transitions. [2023-11-29 07:03:52,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2023-11-29 07:03:52,249 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:52,249 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:52,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 07:03:52,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:52,450 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:52,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:52,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1819502093, now seen corresponding path program 1 times [2023-11-29 07:03:52,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:52,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678700644] [2023-11-29 07:03:52,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:52,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:52,496 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:52,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [78229162] [2023-11-29 07:03:52,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:52,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:52,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:52,497 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:52,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 07:03:52,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:52,918 INFO L262 TraceCheckSpWp]: Trace formula consists of 1204 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 07:03:52,923 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:53,270 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 4685 proven. 30 refuted. 0 times theorem prover too weak. 3865 trivial. 0 not checked. [2023-11-29 07:03:53,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:03:53,525 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 165 proven. 30 refuted. 0 times theorem prover too weak. 8385 trivial. 0 not checked. [2023-11-29 07:03:53,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:53,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678700644] [2023-11-29 07:03:53,525 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:53,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78229162] [2023-11-29 07:03:53,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78229162] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:03:53,526 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:03:53,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2023-11-29 07:03:53,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56842657] [2023-11-29 07:03:53,526 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:03:53,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 07:03:53,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:53,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 07:03:53,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2023-11-29 07:03:53,529 INFO L87 Difference]: Start difference. First operand 6479 states and 9766 transitions. Second operand has 12 states, 12 states have (on average 16.5) internal successors, (198), 12 states have internal predecessors, (198), 5 states have call successors, (118), 3 states have call predecessors, (118), 5 states have return successors, (118), 5 states have call predecessors, (118), 5 states have call successors, (118) [2023-11-29 07:03:54,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:54,306 INFO L93 Difference]: Finished difference Result 11583 states and 17432 transitions. [2023-11-29 07:03:54,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 07:03:54,306 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 16.5) internal successors, (198), 12 states have internal predecessors, (198), 5 states have call successors, (118), 3 states have call predecessors, (118), 5 states have return successors, (118), 5 states have call predecessors, (118), 5 states have call successors, (118) Word has length 475 [2023-11-29 07:03:54,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:54,313 INFO L225 Difference]: With dead ends: 11583 [2023-11-29 07:03:54,313 INFO L226 Difference]: Without dead ends: 5261 [2023-11-29 07:03:54,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 953 GetRequests, 938 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2023-11-29 07:03:54,318 INFO L413 NwaCegarLoop]: 365 mSDtfsCounter, 1328 mSDsluCounter, 714 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1383 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 07:03:54,318 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1383 Valid, 1079 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 07:03:54,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5261 states. [2023-11-29 07:03:54,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5261 to 4484. [2023-11-29 07:03:54,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4484 states, 3875 states have (on average 1.4583225806451612) internal successors, (5651), 3884 states have internal predecessors, (5651), 530 states have call successors, (530), 78 states have call predecessors, (530), 78 states have return successors, (530), 521 states have call predecessors, (530), 530 states have call successors, (530) [2023-11-29 07:03:54,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4484 states to 4484 states and 6711 transitions. [2023-11-29 07:03:54,624 INFO L78 Accepts]: Start accepts. Automaton has 4484 states and 6711 transitions. Word has length 475 [2023-11-29 07:03:54,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:54,625 INFO L495 AbstractCegarLoop]: Abstraction has 4484 states and 6711 transitions. [2023-11-29 07:03:54,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.5) internal successors, (198), 12 states have internal predecessors, (198), 5 states have call successors, (118), 3 states have call predecessors, (118), 5 states have return successors, (118), 5 states have call predecessors, (118), 5 states have call successors, (118) [2023-11-29 07:03:54,625 INFO L276 IsEmpty]: Start isEmpty. Operand 4484 states and 6711 transitions. [2023-11-29 07:03:54,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2023-11-29 07:03:54,628 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:54,629 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:54,637 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 07:03:54,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 07:03:54,829 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:54,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:54,829 INFO L85 PathProgramCache]: Analyzing trace with hash 874578460, now seen corresponding path program 1 times [2023-11-29 07:03:54,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:54,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285135853] [2023-11-29 07:03:54,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:54,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:54,885 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:54,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1939660696] [2023-11-29 07:03:54,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:54,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:54,886 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:54,886 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:54,889 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 07:03:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:55,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 07:03:55,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:03:56,387 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 65 proven. 195 refuted. 0 times theorem prover too weak. 8320 trivial. 0 not checked. [2023-11-29 07:03:56,387 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:03:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 0 proven. 195 refuted. 0 times theorem prover too weak. 8385 trivial. 0 not checked. [2023-11-29 07:03:56,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:03:56,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285135853] [2023-11-29 07:03:56,757 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:03:56,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939660696] [2023-11-29 07:03:56,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939660696] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:03:56,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:03:56,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-29 07:03:56,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14416405] [2023-11-29 07:03:56,758 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:03:56,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 07:03:56,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:03:56,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 07:03:56,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2023-11-29 07:03:56,760 INFO L87 Difference]: Start difference. First operand 4484 states and 6711 transitions. Second operand has 16 states, 15 states have (on average 13.666666666666666) internal successors, (205), 16 states have internal predecessors, (205), 4 states have call successors, (132), 3 states have call predecessors, (132), 4 states have return successors, (132), 2 states have call predecessors, (132), 4 states have call successors, (132) [2023-11-29 07:03:58,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:03:58,743 INFO L93 Difference]: Finished difference Result 19347 states and 29239 transitions. [2023-11-29 07:03:58,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 07:03:58,744 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 13.666666666666666) internal successors, (205), 16 states have internal predecessors, (205), 4 states have call successors, (132), 3 states have call predecessors, (132), 4 states have return successors, (132), 2 states have call predecessors, (132), 4 states have call successors, (132) Word has length 476 [2023-11-29 07:03:58,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:03:58,758 INFO L225 Difference]: With dead ends: 19347 [2023-11-29 07:03:58,758 INFO L226 Difference]: Without dead ends: 15018 [2023-11-29 07:03:58,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 965 GetRequests, 938 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2023-11-29 07:03:58,764 INFO L413 NwaCegarLoop]: 366 mSDtfsCounter, 3462 mSDsluCounter, 3614 mSDsCounter, 0 mSdLazyCounter, 1915 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3527 SdHoareTripleChecker+Valid, 3980 SdHoareTripleChecker+Invalid, 2275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 1915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 07:03:58,764 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3527 Valid, 3980 Invalid, 2275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 1915 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 07:03:58,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15018 states. [2023-11-29 07:03:59,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15018 to 4491. [2023-11-29 07:03:59,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4491 states, 3881 states have (on average 1.4576140170059264) internal successors, (5657), 3890 states have internal predecessors, (5657), 530 states have call successors, (530), 79 states have call predecessors, (530), 79 states have return successors, (530), 521 states have call predecessors, (530), 530 states have call successors, (530) [2023-11-29 07:03:59,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4491 states to 4491 states and 6717 transitions. [2023-11-29 07:03:59,142 INFO L78 Accepts]: Start accepts. Automaton has 4491 states and 6717 transitions. Word has length 476 [2023-11-29 07:03:59,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:03:59,143 INFO L495 AbstractCegarLoop]: Abstraction has 4491 states and 6717 transitions. [2023-11-29 07:03:59,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 13.666666666666666) internal successors, (205), 16 states have internal predecessors, (205), 4 states have call successors, (132), 3 states have call predecessors, (132), 4 states have return successors, (132), 2 states have call predecessors, (132), 4 states have call successors, (132) [2023-11-29 07:03:59,143 INFO L276 IsEmpty]: Start isEmpty. Operand 4491 states and 6717 transitions. [2023-11-29 07:03:59,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2023-11-29 07:03:59,146 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:03:59,147 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:03:59,153 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 07:03:59,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:59,347 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:03:59,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:03:59,348 INFO L85 PathProgramCache]: Analyzing trace with hash -1522892070, now seen corresponding path program 1 times [2023-11-29 07:03:59,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:03:59,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841293246] [2023-11-29 07:03:59,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:59,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:03:59,399 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:03:59,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1139271044] [2023-11-29 07:03:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:03:59,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:03:59,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:03:59,400 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:03:59,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 07:03:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:03:59,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 07:03:59,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:04:03,201 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 4315 proven. 501 refuted. 0 times theorem prover too weak. 3764 trivial. 0 not checked. [2023-11-29 07:04:03,201 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:04:06,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 69 proven. 318 refuted. 0 times theorem prover too weak. 8193 trivial. 0 not checked. [2023-11-29 07:04:06,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:04:06,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841293246] [2023-11-29 07:04:06,194 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:04:06,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139271044] [2023-11-29 07:04:06,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1139271044] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:04:06,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:04:06,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13] total 29 [2023-11-29 07:04:06,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27182040] [2023-11-29 07:04:06,195 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:04:06,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 07:04:06,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:04:06,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 07:04:06,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=624, Unknown=0, NotChecked=0, Total=812 [2023-11-29 07:04:06,198 INFO L87 Difference]: Start difference. First operand 4491 states and 6717 transitions. Second operand has 29 states, 29 states have (on average 8.586206896551724) internal successors, (249), 28 states have internal predecessors, (249), 9 states have call successors, (132), 6 states have call predecessors, (132), 9 states have return successors, (132), 7 states have call predecessors, (132), 9 states have call successors, (132) [2023-11-29 07:04:12,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:04:12,656 INFO L93 Difference]: Finished difference Result 28060 states and 42449 transitions. [2023-11-29 07:04:12,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-29 07:04:12,657 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 8.586206896551724) internal successors, (249), 28 states have internal predecessors, (249), 9 states have call successors, (132), 6 states have call predecessors, (132), 9 states have return successors, (132), 7 states have call predecessors, (132), 9 states have call successors, (132) Word has length 476 [2023-11-29 07:04:12,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:04:12,685 INFO L225 Difference]: With dead ends: 28060 [2023-11-29 07:04:12,686 INFO L226 Difference]: Without dead ends: 23728 [2023-11-29 07:04:12,698 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1009 GetRequests, 935 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1813 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1511, Invalid=4189, Unknown=0, NotChecked=0, Total=5700 [2023-11-29 07:04:12,699 INFO L413 NwaCegarLoop]: 326 mSDtfsCounter, 7121 mSDsluCounter, 5047 mSDsCounter, 0 mSdLazyCounter, 3775 mSolverCounterSat, 843 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7124 SdHoareTripleChecker+Valid, 5373 SdHoareTripleChecker+Invalid, 4618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 843 IncrementalHoareTripleChecker+Valid, 3775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-29 07:04:12,699 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7124 Valid, 5373 Invalid, 4618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [843 Valid, 3775 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-29 07:04:12,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23728 states. [2023-11-29 07:04:13,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23728 to 10116. [2023-11-29 07:04:13,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10116 states, 9219 states have (on average 1.4736956285931229) internal successors, (13586), 9244 states have internal predecessors, (13586), 744 states have call successors, (744), 152 states have call predecessors, (744), 152 states have return successors, (744), 719 states have call predecessors, (744), 744 states have call successors, (744) [2023-11-29 07:04:13,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10116 states to 10116 states and 15074 transitions. [2023-11-29 07:04:13,459 INFO L78 Accepts]: Start accepts. Automaton has 10116 states and 15074 transitions. Word has length 476 [2023-11-29 07:04:13,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:04:13,459 INFO L495 AbstractCegarLoop]: Abstraction has 10116 states and 15074 transitions. [2023-11-29 07:04:13,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 8.586206896551724) internal successors, (249), 28 states have internal predecessors, (249), 9 states have call successors, (132), 6 states have call predecessors, (132), 9 states have return successors, (132), 7 states have call predecessors, (132), 9 states have call successors, (132) [2023-11-29 07:04:13,459 INFO L276 IsEmpty]: Start isEmpty. Operand 10116 states and 15074 transitions. [2023-11-29 07:04:13,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2023-11-29 07:04:13,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:04:13,464 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:04:13,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 07:04:13,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 07:04:13,665 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:04:13,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:04:13,665 INFO L85 PathProgramCache]: Analyzing trace with hash 1804724572, now seen corresponding path program 1 times [2023-11-29 07:04:13,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:04:13,666 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748940450] [2023-11-29 07:04:13,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:04:13,666 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:04:13,716 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:04:13,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1115202821] [2023-11-29 07:04:13,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:04:13,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:04:13,716 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:04:13,717 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:04:13,718 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 07:04:14,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:04:14,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 07:04:14,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:04:15,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 5453 proven. 345 refuted. 0 times theorem prover too weak. 2782 trivial. 0 not checked. [2023-11-29 07:04:15,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:04:15,956 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 222 proven. 354 refuted. 0 times theorem prover too weak. 8004 trivial. 0 not checked. [2023-11-29 07:04:15,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:04:15,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748940450] [2023-11-29 07:04:15,957 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:04:15,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115202821] [2023-11-29 07:04:15,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115202821] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:04:15,957 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:04:15,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2023-11-29 07:04:15,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117983804] [2023-11-29 07:04:15,957 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:04:15,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 07:04:15,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:04:15,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 07:04:15,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=408, Unknown=0, NotChecked=0, Total=552 [2023-11-29 07:04:15,960 INFO L87 Difference]: Start difference. First operand 10116 states and 15074 transitions. Second operand has 24 states, 23 states have (on average 10.869565217391305) internal successors, (250), 22 states have internal predecessors, (250), 7 states have call successors, (111), 4 states have call predecessors, (111), 9 states have return successors, (112), 7 states have call predecessors, (112), 7 states have call successors, (112) [2023-11-29 07:04:18,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:04:18,560 INFO L93 Difference]: Finished difference Result 19264 states and 28511 transitions. [2023-11-29 07:04:18,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 07:04:18,561 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 10.869565217391305) internal successors, (250), 22 states have internal predecessors, (250), 7 states have call successors, (111), 4 states have call predecessors, (111), 9 states have return successors, (112), 7 states have call predecessors, (112), 7 states have call successors, (112) Word has length 476 [2023-11-29 07:04:18,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:04:18,572 INFO L225 Difference]: With dead ends: 19264 [2023-11-29 07:04:18,572 INFO L226 Difference]: Without dead ends: 10402 [2023-11-29 07:04:18,578 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 971 GetRequests, 929 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=569, Invalid=1323, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 07:04:18,579 INFO L413 NwaCegarLoop]: 387 mSDtfsCounter, 2192 mSDsluCounter, 1865 mSDsCounter, 0 mSdLazyCounter, 1360 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2212 SdHoareTripleChecker+Valid, 2252 SdHoareTripleChecker+Invalid, 1679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 1360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 07:04:18,579 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2212 Valid, 2252 Invalid, 1679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 1360 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 07:04:18,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10402 states. [2023-11-29 07:04:19,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10402 to 8166. [2023-11-29 07:04:19,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8166 states, 7222 states have (on average 1.4516754361672666) internal successors, (10484), 7250 states have internal predecessors, (10484), 746 states have call successors, (746), 197 states have call predecessors, (746), 197 states have return successors, (746), 718 states have call predecessors, (746), 746 states have call successors, (746) [2023-11-29 07:04:19,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8166 states to 8166 states and 11976 transitions. [2023-11-29 07:04:19,455 INFO L78 Accepts]: Start accepts. Automaton has 8166 states and 11976 transitions. Word has length 476 [2023-11-29 07:04:19,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:04:19,456 INFO L495 AbstractCegarLoop]: Abstraction has 8166 states and 11976 transitions. [2023-11-29 07:04:19,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 10.869565217391305) internal successors, (250), 22 states have internal predecessors, (250), 7 states have call successors, (111), 4 states have call predecessors, (111), 9 states have return successors, (112), 7 states have call predecessors, (112), 7 states have call successors, (112) [2023-11-29 07:04:19,456 INFO L276 IsEmpty]: Start isEmpty. Operand 8166 states and 11976 transitions. [2023-11-29 07:04:19,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 477 [2023-11-29 07:04:19,460 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:04:19,460 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:04:19,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 07:04:19,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 07:04:19,660 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:04:19,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:04:19,661 INFO L85 PathProgramCache]: Analyzing trace with hash 228493020, now seen corresponding path program 1 times [2023-11-29 07:04:19,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:04:19,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547353568] [2023-11-29 07:04:19,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:04:19,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:04:19,711 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:04:19,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1808545185] [2023-11-29 07:04:19,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:04:19,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:04:19,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:04:19,712 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:04:19,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 07:04:20,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:04:20,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 1207 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 07:04:20,404 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:04:21,757 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 3752 proven. 264 refuted. 0 times theorem prover too weak. 4564 trivial. 0 not checked. [2023-11-29 07:04:21,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:04:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 120 proven. 267 refuted. 0 times theorem prover too weak. 8193 trivial. 0 not checked. [2023-11-29 07:04:22,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:04:22,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547353568] [2023-11-29 07:04:22,355 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:04:22,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808545185] [2023-11-29 07:04:22,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808545185] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 07:04:22,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 07:04:22,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-29 07:04:22,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13970792] [2023-11-29 07:04:22,356 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 07:04:22,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 07:04:22,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:04:22,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 07:04:22,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2023-11-29 07:04:22,359 INFO L87 Difference]: Start difference. First operand 8166 states and 11976 transitions. Second operand has 18 states, 17 states have (on average 16.235294117647058) internal successors, (276), 16 states have internal predecessors, (276), 6 states have call successors, (132), 4 states have call predecessors, (132), 7 states have return successors, (132), 6 states have call predecessors, (132), 6 states have call successors, (132) [2023-11-29 07:04:23,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:04:23,748 INFO L93 Difference]: Finished difference Result 15680 states and 23002 transitions. [2023-11-29 07:04:23,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 07:04:23,749 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 16.235294117647058) internal successors, (276), 16 states have internal predecessors, (276), 6 states have call successors, (132), 4 states have call predecessors, (132), 7 states have return successors, (132), 6 states have call predecessors, (132), 6 states have call successors, (132) Word has length 476 [2023-11-29 07:04:23,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:04:23,758 INFO L225 Difference]: With dead ends: 15680 [2023-11-29 07:04:23,759 INFO L226 Difference]: Without dead ends: 8246 [2023-11-29 07:04:23,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 960 GetRequests, 935 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2023-11-29 07:04:23,765 INFO L413 NwaCegarLoop]: 354 mSDtfsCounter, 1012 mSDsluCounter, 886 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1032 SdHoareTripleChecker+Valid, 1240 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 07:04:23,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1032 Valid, 1240 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 07:04:23,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8246 states. [2023-11-29 07:04:24,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8246 to 8166. [2023-11-29 07:04:24,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8166 states, 7222 states have (on average 1.445029077817779) internal successors, (10436), 7250 states have internal predecessors, (10436), 746 states have call successors, (746), 197 states have call predecessors, (746), 197 states have return successors, (746), 718 states have call predecessors, (746), 746 states have call successors, (746) [2023-11-29 07:04:24,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8166 states to 8166 states and 11928 transitions. [2023-11-29 07:04:24,596 INFO L78 Accepts]: Start accepts. Automaton has 8166 states and 11928 transitions. Word has length 476 [2023-11-29 07:04:24,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:04:24,596 INFO L495 AbstractCegarLoop]: Abstraction has 8166 states and 11928 transitions. [2023-11-29 07:04:24,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 16.235294117647058) internal successors, (276), 16 states have internal predecessors, (276), 6 states have call successors, (132), 4 states have call predecessors, (132), 7 states have return successors, (132), 6 states have call predecessors, (132), 6 states have call successors, (132) [2023-11-29 07:04:24,597 INFO L276 IsEmpty]: Start isEmpty. Operand 8166 states and 11928 transitions. [2023-11-29 07:04:24,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2023-11-29 07:04:24,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:04:24,601 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:04:24,608 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-29 07:04:24,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:04:24,801 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:04:24,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:04:24,802 INFO L85 PathProgramCache]: Analyzing trace with hash -627915493, now seen corresponding path program 1 times [2023-11-29 07:04:24,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:04:24,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325336270] [2023-11-29 07:04:24,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:04:24,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:04:24,850 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:04:24,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [560398780] [2023-11-29 07:04:24,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:04:24,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:04:24,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:04:24,852 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:04:24,853 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 07:04:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:04:25,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 1208 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 07:04:25,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 07:04:27,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8580 backedges. 5786 proven. 390 refuted. 0 times theorem prover too weak. 2404 trivial. 0 not checked. [2023-11-29 07:04:27,443 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 07:04:31,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 07:04:31,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325336270] [2023-11-29 07:04:31,481 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 07:04:31,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560398780] [2023-11-29 07:04:31,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560398780] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 07:04:31,482 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 07:04:31,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2023-11-29 07:04:31,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236003869] [2023-11-29 07:04:31,482 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 07:04:31,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 07:04:31,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 07:04:31,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 07:04:31,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2023-11-29 07:04:31,484 INFO L87 Difference]: Start difference. First operand 8166 states and 11928 transitions. Second operand has 13 states, 13 states have (on average 12.923076923076923) internal successors, (168), 13 states have internal predecessors, (168), 4 states have call successors, (66), 4 states have call predecessors, (66), 7 states have return successors, (66), 4 states have call predecessors, (66), 4 states have call successors, (66) [2023-11-29 07:04:34,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 07:04:34,678 INFO L93 Difference]: Finished difference Result 16402 states and 23825 transitions. [2023-11-29 07:04:34,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 07:04:34,678 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 12.923076923076923) internal successors, (168), 13 states have internal predecessors, (168), 4 states have call successors, (66), 4 states have call predecessors, (66), 7 states have return successors, (66), 4 states have call predecessors, (66), 4 states have call successors, (66) Word has length 477 [2023-11-29 07:04:34,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 07:04:34,688 INFO L225 Difference]: With dead ends: 16402 [2023-11-29 07:04:34,688 INFO L226 Difference]: Without dead ends: 8452 [2023-11-29 07:04:34,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 567 SyntacticMatches, 6 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=202, Invalid=668, Unknown=0, NotChecked=0, Total=870 [2023-11-29 07:04:34,695 INFO L413 NwaCegarLoop]: 349 mSDtfsCounter, 715 mSDsluCounter, 1623 mSDsCounter, 0 mSdLazyCounter, 1750 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 721 SdHoareTripleChecker+Valid, 1972 SdHoareTripleChecker+Invalid, 1813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 1750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 07:04:34,695 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [721 Valid, 1972 Invalid, 1813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 1750 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 07:04:34,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8452 states. [2023-11-29 07:04:35,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8452 to 8330. [2023-11-29 07:04:35,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8330 states, 7345 states have (on average 1.4356705241660994) internal successors, (10545), 7373 states have internal predecessors, (10545), 746 states have call successors, (746), 238 states have call predecessors, (746), 238 states have return successors, (746), 718 states have call predecessors, (746), 746 states have call successors, (746) [2023-11-29 07:04:35,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8330 states to 8330 states and 12037 transitions. [2023-11-29 07:04:35,705 INFO L78 Accepts]: Start accepts. Automaton has 8330 states and 12037 transitions. Word has length 477 [2023-11-29 07:04:35,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 07:04:35,705 INFO L495 AbstractCegarLoop]: Abstraction has 8330 states and 12037 transitions. [2023-11-29 07:04:35,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 12.923076923076923) internal successors, (168), 13 states have internal predecessors, (168), 4 states have call successors, (66), 4 states have call predecessors, (66), 7 states have return successors, (66), 4 states have call predecessors, (66), 4 states have call successors, (66) [2023-11-29 07:04:35,705 INFO L276 IsEmpty]: Start isEmpty. Operand 8330 states and 12037 transitions. [2023-11-29 07:04:35,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 478 [2023-11-29 07:04:35,710 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 07:04:35,710 INFO L195 NwaCegarLoop]: trace histogram [66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 07:04:35,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 07:04:35,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:04:35,911 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 07:04:35,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 07:04:35,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1398649059, now seen corresponding path program 1 times [2023-11-29 07:04:35,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 07:04:35,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766662555] [2023-11-29 07:04:35,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:04:35,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 07:04:35,960 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 07:04:35,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2033583112] [2023-11-29 07:04:35,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 07:04:35,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 07:04:35,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 07:04:35,966 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 07:04:35,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b484c1d7-c8a1-498d-8368-ebf23ea65936/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 07:04:37,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 07:04:37,398 INFO L262 TraceCheckSpWp]: Trace formula consists of 1210 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 07:04:37,405 INFO L285 TraceCheckSpWp]: Computing forward predicates...