./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-97.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_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/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_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-97.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/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_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/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 27b7d41c83bd27c4821a45cf0c1b489a71375b91c18644eeffdc9ad906f09c11 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:44:17,888 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:44:17,949 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:44:17,954 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:44:17,954 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:44:17,979 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:44:17,979 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:44:17,980 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:44:17,980 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:44:17,981 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:44:17,982 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:44:17,982 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:44:17,983 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:44:17,983 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:44:17,984 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:44:17,984 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:44:17,985 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:44:17,985 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:44:17,986 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:44:17,986 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:44:17,987 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:44:17,988 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:44:17,988 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:44:17,989 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:44:17,989 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:44:17,990 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:44:17,990 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:44:17,991 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:44:17,991 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:44:17,991 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:44:17,992 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:44:17,992 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:44:17,992 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:44:17,993 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:44:17,993 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:44:17,993 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:44:17,993 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:44:17,993 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:44:17,993 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:44:17,994 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:44:17,994 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:44:17,994 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:44:17,994 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_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 27b7d41c83bd27c4821a45cf0c1b489a71375b91c18644eeffdc9ad906f09c11 [2023-11-29 06:44:18,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:44:18,215 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:44:18,218 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:44:18,219 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:44:18,219 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:44:18,221 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-97.i [2023-11-29 06:44:21,010 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:44:21,255 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:44:21,256 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-97.i [2023-11-29 06:44:21,273 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/data/f174f5935/7049021e058945d995bade634eaa0b96/FLAG2995454c2 [2023-11-29 06:44:21,290 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/data/f174f5935/7049021e058945d995bade634eaa0b96 [2023-11-29 06:44:21,293 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:44:21,295 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:44:21,297 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:44:21,297 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:44:21,303 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:44:21,303 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:44:21" (1/1) ... [2023-11-29 06:44:21,305 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@92e2748 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:21, skipping insertion in model container [2023-11-29 06:44:21,305 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:44:21" (1/1) ... [2023-11-29 06:44:21,375 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:44:21,530 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_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-97.i[916,929] [2023-11-29 06:44:21,740 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:44:21,758 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:44:21,768 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_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-97.i[916,929] [2023-11-29 06:44:21,884 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:44:21,922 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:44:21,923 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:21 WrapperNode [2023-11-29 06:44:21,923 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:44:21,924 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:44:21,924 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:44:21,924 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:44:21,932 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:21" (1/1) ... [2023-11-29 06:44:21,960 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:21" (1/1) ... [2023-11-29 06:44:22,060 INFO L138 Inliner]: procedures = 26, calls = 85, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 780 [2023-11-29 06:44:22,060 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:44:22,061 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:44:22,061 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:44:22,061 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:44:22,073 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:21" (1/1) ... [2023-11-29 06:44:22,073 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:21" (1/1) ... [2023-11-29 06:44:22,089 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:21" (1/1) ... [2023-11-29 06:44:22,125 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 06:44:22,125 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:21" (1/1) ... [2023-11-29 06:44:22,125 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:21" (1/1) ... [2023-11-29 06:44:22,150 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:21" (1/1) ... [2023-11-29 06:44:22,159 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:21" (1/1) ... [2023-11-29 06:44:22,170 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:21" (1/1) ... [2023-11-29 06:44:22,178 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:21" (1/1) ... [2023-11-29 06:44:22,199 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:44:22,200 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:44:22,200 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:44:22,200 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:44:22,201 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:21" (1/1) ... [2023-11-29 06:44:22,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:44:22,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:44:22,232 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:44:22,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:44:22,258 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:44:22,258 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 06:44:22,258 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 06:44:22,258 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:44:22,258 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:44:22,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:44:22,400 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:44:22,402 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:44:23,566 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:44:23,662 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:44:23,662 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 06:44:23,663 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:44:23 BoogieIcfgContainer [2023-11-29 06:44:23,663 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:44:23,666 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:44:23,666 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:44:23,670 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:44:23,670 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:44:21" (1/3) ... [2023-11-29 06:44:23,671 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c4cb89e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:44:23, skipping insertion in model container [2023-11-29 06:44:23,672 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:44:21" (2/3) ... [2023-11-29 06:44:23,672 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c4cb89e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:44:23, skipping insertion in model container [2023-11-29 06:44:23,672 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:44:23" (3/3) ... [2023-11-29 06:44:23,674 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-97.i [2023-11-29 06:44:23,697 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:44:23,697 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:44:23,766 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:44:23,774 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;@71e202c0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:44:23,774 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 06:44:23,781 INFO L276 IsEmpty]: Start isEmpty. Operand has 299 states, 224 states have (on average 1.6160714285714286) internal successors, (362), 225 states have internal predecessors, (362), 72 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-29 06:44:23,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2023-11-29 06:44:23,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:44:23,819 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:23,820 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:44:23,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:23,826 INFO L85 PathProgramCache]: Analyzing trace with hash 864953944, now seen corresponding path program 1 times [2023-11-29 06:44:23,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:44:23,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838133897] [2023-11-29 06:44:23,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:23,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:44:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:24,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:44:24,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838133897] [2023-11-29 06:44:24,212 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 06:44:24,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429783854] [2023-11-29 06:44:24,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:24,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:24,213 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:44:24,215 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:44:24,223 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:44:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:24,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 06:44:24,678 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:44:24,777 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 10082 trivial. 0 not checked. [2023-11-29 06:44:24,777 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:44:24,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429783854] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:44:24,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:44:24,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:44:24,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264247284] [2023-11-29 06:44:24,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:44:24,788 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 06:44:24,788 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:44:24,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 06:44:24,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:44:24,823 INFO L87 Difference]: Start difference. First operand has 299 states, 224 states have (on average 1.6160714285714286) internal successors, (362), 225 states have internal predecessors, (362), 72 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) Second operand has 2 states, 2 states have (on average 72.0) internal successors, (144), 2 states have internal predecessors, (144), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 2 states have call successors, (72) [2023-11-29 06:44:24,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:44:24,899 INFO L93 Difference]: Finished difference Result 595 states and 1082 transitions. [2023-11-29 06:44:24,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 06:44:24,902 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 72.0) internal successors, (144), 2 states have internal predecessors, (144), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 2 states have call successors, (72) Word has length 499 [2023-11-29 06:44:24,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:44:24,914 INFO L225 Difference]: With dead ends: 595 [2023-11-29 06:44:24,915 INFO L226 Difference]: Without dead ends: 297 [2023-11-29 06:44:24,921 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 498 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 06:44:24,925 INFO L413 NwaCegarLoop]: 495 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, 495 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 06:44:24,926 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 495 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:44:24,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-11-29 06:44:25,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 297. [2023-11-29 06:44:25,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 297 states, 223 states have (on average 1.5874439461883407) internal successors, (354), 223 states have internal predecessors, (354), 72 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 72 states have call predecessors, (72), 72 states have call successors, (72) [2023-11-29 06:44:25,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 297 states to 297 states and 498 transitions. [2023-11-29 06:44:25,007 INFO L78 Accepts]: Start accepts. Automaton has 297 states and 498 transitions. Word has length 499 [2023-11-29 06:44:25,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:44:25,008 INFO L495 AbstractCegarLoop]: Abstraction has 297 states and 498 transitions. [2023-11-29 06:44:25,008 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 72.0) internal successors, (144), 2 states have internal predecessors, (144), 2 states have call successors, (72), 2 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 2 states have call successors, (72) [2023-11-29 06:44:25,009 INFO L276 IsEmpty]: Start isEmpty. Operand 297 states and 498 transitions. [2023-11-29 06:44:25,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2023-11-29 06:44:25,023 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:44:25,024 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:25,038 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:44:25,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 06:44:25,225 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:44:25,226 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:25,226 INFO L85 PathProgramCache]: Analyzing trace with hash 2068244440, now seen corresponding path program 1 times [2023-11-29 06:44:25,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:44:25,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000324594] [2023-11-29 06:44:25,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:25,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:44:25,344 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:44:25,344 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620629538] [2023-11-29 06:44:25,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:25,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:25,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:44:25,350 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:44:25,354 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:44:25,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:25,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:44:25,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:44:25,909 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-29 06:44:25,909 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:44:25,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:44:25,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000324594] [2023-11-29 06:44:25,910 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:44:25,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620629538] [2023-11-29 06:44:25,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620629538] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:44:25,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:44:25,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:44:25,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767758947] [2023-11-29 06:44:25,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:44:25,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:44:25,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:44:25,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:44:25,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:44:25,915 INFO L87 Difference]: Start difference. First operand 297 states and 498 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 06:44:26,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:44:26,066 INFO L93 Difference]: Finished difference Result 764 states and 1280 transitions. [2023-11-29 06:44:26,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:44:26,067 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 499 [2023-11-29 06:44:26,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:44:26,074 INFO L225 Difference]: With dead ends: 764 [2023-11-29 06:44:26,074 INFO L226 Difference]: Without dead ends: 468 [2023-11-29 06:44:26,076 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 497 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 06:44:26,077 INFO L413 NwaCegarLoop]: 542 mSDtfsCounter, 256 mSDsluCounter, 471 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 1013 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:44:26,078 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 1013 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:44:26,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2023-11-29 06:44:26,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 465. [2023-11-29 06:44:26,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 368 states have (on average 1.6032608695652173) internal successors, (590), 369 states have internal predecessors, (590), 94 states have call successors, (94), 2 states have call predecessors, (94), 2 states have return successors, (94), 93 states have call predecessors, (94), 94 states have call successors, (94) [2023-11-29 06:44:26,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 778 transitions. [2023-11-29 06:44:26,131 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 778 transitions. Word has length 499 [2023-11-29 06:44:26,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:44:26,134 INFO L495 AbstractCegarLoop]: Abstraction has 465 states and 778 transitions. [2023-11-29 06:44:26,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 06:44:26,134 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 778 transitions. [2023-11-29 06:44:26,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2023-11-29 06:44:26,148 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:44:26,148 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:26,157 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:44:26,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:26,349 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:44:26,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:26,350 INFO L85 PathProgramCache]: Analyzing trace with hash -287560810, now seen corresponding path program 1 times [2023-11-29 06:44:26,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:44:26,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336676203] [2023-11-29 06:44:26,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:26,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:44:26,428 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:44:26,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1750271914] [2023-11-29 06:44:26,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:26,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:26,429 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:44:26,430 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:44:26,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:44:26,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:26,790 INFO L262 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:44:26,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:44:26,921 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-29 06:44:26,921 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:44:26,922 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:44:26,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336676203] [2023-11-29 06:44:26,922 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:44:26,922 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750271914] [2023-11-29 06:44:26,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750271914] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:44:26,922 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:44:26,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:44:26,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986379799] [2023-11-29 06:44:26,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:44:26,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:44:26,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:44:26,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:44:26,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:44:26,926 INFO L87 Difference]: Start difference. First operand 465 states and 778 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 06:44:27,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:44:27,592 INFO L93 Difference]: Finished difference Result 2038 states and 3394 transitions. [2023-11-29 06:44:27,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:44:27,594 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 499 [2023-11-29 06:44:27,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:44:27,606 INFO L225 Difference]: With dead ends: 2038 [2023-11-29 06:44:27,606 INFO L226 Difference]: Without dead ends: 1574 [2023-11-29 06:44:27,607 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 497 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 06:44:27,609 INFO L413 NwaCegarLoop]: 878 mSDtfsCounter, 878 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 878 SdHoareTripleChecker+Valid, 1625 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:44:27,609 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [878 Valid, 1625 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 06:44:27,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1574 states. [2023-11-29 06:44:27,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1574 to 1566. [2023-11-29 06:44:27,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1273 states have (on average 1.5993715632364494) internal successors, (2036), 1279 states have internal predecessors, (2036), 284 states have call successors, (284), 8 states have call predecessors, (284), 8 states have return successors, (284), 278 states have call predecessors, (284), 284 states have call successors, (284) [2023-11-29 06:44:27,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 2604 transitions. [2023-11-29 06:44:27,756 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 2604 transitions. Word has length 499 [2023-11-29 06:44:27,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:44:27,757 INFO L495 AbstractCegarLoop]: Abstraction has 1566 states and 2604 transitions. [2023-11-29 06:44:27,758 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 4 states have internal predecessors, (142), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 06:44:27,758 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 2604 transitions. [2023-11-29 06:44:27,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2023-11-29 06:44:27,765 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:44:27,765 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:27,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 06:44:27,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:27,966 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:44:27,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:27,967 INFO L85 PathProgramCache]: Analyzing trace with hash -12801196, now seen corresponding path program 1 times [2023-11-29 06:44:27,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:44:27,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220246193] [2023-11-29 06:44:27,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:27,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:44:28,045 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:44:28,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1005495168] [2023-11-29 06:44:28,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:28,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:28,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:44:28,047 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:44:28,049 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:44:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:28,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:44:28,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:44:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 4427 proven. 147 refuted. 0 times theorem prover too weak. 5650 trivial. 0 not checked. [2023-11-29 06:44:28,929 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:44:29,365 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 66 proven. 147 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-11-29 06:44:29,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:44:29,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220246193] [2023-11-29 06:44:29,366 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:44:29,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005495168] [2023-11-29 06:44:29,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005495168] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:44:29,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:44:29,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 06:44:29,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286746484] [2023-11-29 06:44:29,367 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:44:29,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:44:29,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:44:29,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:44:29,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:44:29,371 INFO L87 Difference]: Start difference. First operand 1566 states and 2604 transitions. Second operand has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 2 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 2 states have call predecessors, (122), 2 states have call successors, (122) [2023-11-29 06:44:29,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:44:29,909 INFO L93 Difference]: Finished difference Result 2511 states and 4164 transitions. [2023-11-29 06:44:29,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:44:29,910 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 2 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 2 states have call predecessors, (122), 2 states have call successors, (122) Word has length 499 [2023-11-29 06:44:29,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:44:29,916 INFO L225 Difference]: With dead ends: 2511 [2023-11-29 06:44:29,916 INFO L226 Difference]: Without dead ends: 946 [2023-11-29 06:44:29,919 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1000 GetRequests, 990 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:44:29,920 INFO L413 NwaCegarLoop]: 401 mSDtfsCounter, 615 mSDsluCounter, 653 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 1054 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:44:29,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [637 Valid, 1054 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:44:29,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 946 states. [2023-11-29 06:44:29,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 946 to 938. [2023-11-29 06:44:29,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 733 states have (on average 1.5702592087312415) internal successors, (1151), 735 states have internal predecessors, (1151), 196 states have call successors, (196), 8 states have call predecessors, (196), 8 states have return successors, (196), 194 states have call predecessors, (196), 196 states have call successors, (196) [2023-11-29 06:44:29,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1543 transitions. [2023-11-29 06:44:30,000 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1543 transitions. Word has length 499 [2023-11-29 06:44:30,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:44:30,001 INFO L495 AbstractCegarLoop]: Abstraction has 938 states and 1543 transitions. [2023-11-29 06:44:30,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.571428571428573) internal successors, (151), 7 states have internal predecessors, (151), 2 states have call successors, (121), 2 states have call predecessors, (121), 4 states have return successors, (122), 2 states have call predecessors, (122), 2 states have call successors, (122) [2023-11-29 06:44:30,002 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1543 transitions. [2023-11-29 06:44:30,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 502 [2023-11-29 06:44:30,006 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:44:30,007 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:30,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 06:44:30,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:30,210 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:44:30,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:30,210 INFO L85 PathProgramCache]: Analyzing trace with hash 1674529174, now seen corresponding path program 1 times [2023-11-29 06:44:30,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:44:30,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226411751] [2023-11-29 06:44:30,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:30,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:44:30,280 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:44:30,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869834656] [2023-11-29 06:44:30,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:30,280 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:30,280 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:44:30,281 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:44:30,286 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:44:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:30,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:44:30,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:44:31,140 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 4631 proven. 141 refuted. 0 times theorem prover too weak. 5452 trivial. 0 not checked. [2023-11-29 06:44:31,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:44:31,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 72 proven. 141 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-11-29 06:44:31,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:44:31,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226411751] [2023-11-29 06:44:31,570 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:44:31,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869834656] [2023-11-29 06:44:31,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869834656] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:44:31,571 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:44:31,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-29 06:44:31,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422752465] [2023-11-29 06:44:31,571 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:44:31,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 06:44:31,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:44:31,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 06:44:31,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:44:31,575 INFO L87 Difference]: Start difference. First operand 938 states and 1543 transitions. Second operand has 8 states, 8 states have (on average 32.125) internal successors, (257), 8 states have internal predecessors, (257), 3 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 3 states have call predecessors, (120), 3 states have call successors, (120) [2023-11-29 06:44:32,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:44:32,082 INFO L93 Difference]: Finished difference Result 1899 states and 3105 transitions. [2023-11-29 06:44:32,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:44:32,083 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 32.125) internal successors, (257), 8 states have internal predecessors, (257), 3 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 3 states have call predecessors, (120), 3 states have call successors, (120) Word has length 501 [2023-11-29 06:44:32,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:44:32,089 INFO L225 Difference]: With dead ends: 1899 [2023-11-29 06:44:32,090 INFO L226 Difference]: Without dead ends: 962 [2023-11-29 06:44:32,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1004 GetRequests, 994 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 06:44:32,094 INFO L413 NwaCegarLoop]: 392 mSDtfsCounter, 507 mSDsluCounter, 636 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 531 SdHoareTripleChecker+Valid, 1028 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:44:32,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [531 Valid, 1028 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:44:32,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2023-11-29 06:44:32,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 954. [2023-11-29 06:44:32,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 954 states, 745 states have (on average 1.5355704697986576) internal successors, (1144), 747 states have internal predecessors, (1144), 196 states have call successors, (196), 12 states have call predecessors, (196), 12 states have return successors, (196), 194 states have call predecessors, (196), 196 states have call successors, (196) [2023-11-29 06:44:32,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1536 transitions. [2023-11-29 06:44:32,171 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1536 transitions. Word has length 501 [2023-11-29 06:44:32,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:44:32,173 INFO L495 AbstractCegarLoop]: Abstraction has 954 states and 1536 transitions. [2023-11-29 06:44:32,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 32.125) internal successors, (257), 8 states have internal predecessors, (257), 3 states have call successors, (119), 2 states have call predecessors, (119), 4 states have return successors, (120), 3 states have call predecessors, (120), 3 states have call successors, (120) [2023-11-29 06:44:32,173 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1536 transitions. [2023-11-29 06:44:32,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 503 [2023-11-29 06:44:32,177 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:44:32,178 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:32,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 06:44:32,378 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:32,379 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:44:32,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:32,379 INFO L85 PathProgramCache]: Analyzing trace with hash -175616658, now seen corresponding path program 1 times [2023-11-29 06:44:32,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:44:32,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793294192] [2023-11-29 06:44:32,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:32,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:44:32,442 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:44:32,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1305289506] [2023-11-29 06:44:32,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:32,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:32,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:44:32,443 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:44:32,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:44:32,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:32,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 1265 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:44:32,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:44:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 5183 proven. 105 refuted. 0 times theorem prover too weak. 4936 trivial. 0 not checked. [2023-11-29 06:44:33,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:44:33,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 108 proven. 105 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-11-29 06:44:33,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:44:33,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793294192] [2023-11-29 06:44:33,357 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:44:33,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305289506] [2023-11-29 06:44:33,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305289506] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:44:33,358 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:44:33,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 06:44:33,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784520005] [2023-11-29 06:44:33,358 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:44:33,360 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:44:33,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:44:33,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:44:33,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:44:33,361 INFO L87 Difference]: Start difference. First operand 954 states and 1536 transitions. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 2 states have call successors, (107), 2 states have call predecessors, (107), 4 states have return successors, (108), 2 states have call predecessors, (108), 2 states have call successors, (108) [2023-11-29 06:44:33,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:44:33,832 INFO L93 Difference]: Finished difference Result 1923 states and 3085 transitions. [2023-11-29 06:44:33,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:44:33,833 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 2 states have call successors, (107), 2 states have call predecessors, (107), 4 states have return successors, (108), 2 states have call predecessors, (108), 2 states have call successors, (108) Word has length 502 [2023-11-29 06:44:33,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:44:33,841 INFO L225 Difference]: With dead ends: 1923 [2023-11-29 06:44:33,841 INFO L226 Difference]: Without dead ends: 970 [2023-11-29 06:44:33,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1006 GetRequests, 996 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 06:44:33,845 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 872 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 908 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:44:33,846 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [908 Valid, 1043 Invalid, 563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:44:33,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2023-11-29 06:44:33,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 962. [2023-11-29 06:44:33,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 751 states have (on average 1.5246338215712383) internal successors, (1145), 753 states have internal predecessors, (1145), 196 states have call successors, (196), 14 states have call predecessors, (196), 14 states have return successors, (196), 194 states have call predecessors, (196), 196 states have call successors, (196) [2023-11-29 06:44:33,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 1537 transitions. [2023-11-29 06:44:33,969 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 1537 transitions. Word has length 502 [2023-11-29 06:44:33,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:44:33,971 INFO L495 AbstractCegarLoop]: Abstraction has 962 states and 1537 transitions. [2023-11-29 06:44:33,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 2 states have call successors, (107), 2 states have call predecessors, (107), 4 states have return successors, (108), 2 states have call predecessors, (108), 2 states have call successors, (108) [2023-11-29 06:44:33,971 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 1537 transitions. [2023-11-29 06:44:33,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2023-11-29 06:44:33,976 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:44:33,976 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:33,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 06:44:34,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 06:44:34,177 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:44:34,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:34,178 INFO L85 PathProgramCache]: Analyzing trace with hash 190629636, now seen corresponding path program 1 times [2023-11-29 06:44:34,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:44:34,178 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792999138] [2023-11-29 06:44:34,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:34,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:44:34,243 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:44:34,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1487669348] [2023-11-29 06:44:34,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:34,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:34,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:44:34,244 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:44:34,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:44:34,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:34,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 06:44:34,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:44:34,696 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-29 06:44:34,696 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:44:34,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:44:34,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792999138] [2023-11-29 06:44:34,696 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:44:34,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487669348] [2023-11-29 06:44:34,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1487669348] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:44:34,697 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:44:34,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:44:34,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226137992] [2023-11-29 06:44:34,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:44:34,698 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:44:34,698 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:44:34,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:44:34,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:44:34,700 INFO L87 Difference]: Start difference. First operand 962 states and 1537 transitions. Second operand has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 06:44:35,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:44:35,047 INFO L93 Difference]: Finished difference Result 2912 states and 4643 transitions. [2023-11-29 06:44:35,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:44:35,048 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 504 [2023-11-29 06:44:35,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:44:35,063 INFO L225 Difference]: With dead ends: 2912 [2023-11-29 06:44:35,064 INFO L226 Difference]: Without dead ends: 1951 [2023-11-29 06:44:35,067 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 503 GetRequests, 501 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:44:35,068 INFO L413 NwaCegarLoop]: 487 mSDtfsCounter, 446 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 446 SdHoareTripleChecker+Valid, 1349 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:44:35,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [446 Valid, 1349 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:44:35,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2023-11-29 06:44:35,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1839. [2023-11-29 06:44:35,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1839 states, 1416 states have (on average 1.5070621468926553) internal successors, (2134), 1422 states have internal predecessors, (2134), 392 states have call successors, (392), 30 states have call predecessors, (392), 30 states have return successors, (392), 386 states have call predecessors, (392), 392 states have call successors, (392) [2023-11-29 06:44:35,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1839 states to 1839 states and 2918 transitions. [2023-11-29 06:44:35,304 INFO L78 Accepts]: Start accepts. Automaton has 1839 states and 2918 transitions. Word has length 504 [2023-11-29 06:44:35,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:44:35,305 INFO L495 AbstractCegarLoop]: Abstraction has 1839 states and 2918 transitions. [2023-11-29 06:44:35,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.75) internal successors, (147), 4 states have internal predecessors, (147), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 06:44:35,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1839 states and 2918 transitions. [2023-11-29 06:44:35,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2023-11-29 06:44:35,311 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:44:35,311 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:35,319 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:44:35,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:35,512 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:44:35,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:35,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1576833030, now seen corresponding path program 1 times [2023-11-29 06:44:35,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:44:35,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565326140] [2023-11-29 06:44:35,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:35,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:44:35,581 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:44:35,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1290615595] [2023-11-29 06:44:35,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:35,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:35,582 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:44:35,583 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:44:35,586 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:44:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:35,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:44:35,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:44:36,178 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 5163 proven. 99 refuted. 0 times theorem prover too weak. 4962 trivial. 0 not checked. [2023-11-29 06:44:36,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:44:36,420 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 114 proven. 99 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-11-29 06:44:36,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:44:36,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565326140] [2023-11-29 06:44:36,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:44:36,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290615595] [2023-11-29 06:44:36,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290615595] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:44:36,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:44:36,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 06:44:36,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833127083] [2023-11-29 06:44:36,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:44:36,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:44:36,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:44:36,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:44:36,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:44:36,424 INFO L87 Difference]: Start difference. First operand 1839 states and 2918 transitions. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 2 states have call successors, (105), 2 states have call predecessors, (105), 4 states have return successors, (106), 2 states have call predecessors, (106), 2 states have call successors, (106) [2023-11-29 06:44:37,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:44:37,188 INFO L93 Difference]: Finished difference Result 3789 states and 5977 transitions. [2023-11-29 06:44:37,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:44:37,189 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 2 states have call successors, (105), 2 states have call predecessors, (105), 4 states have return successors, (106), 2 states have call predecessors, (106), 2 states have call successors, (106) Word has length 504 [2023-11-29 06:44:37,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:44:37,201 INFO L225 Difference]: With dead ends: 3789 [2023-11-29 06:44:37,201 INFO L226 Difference]: Without dead ends: 1951 [2023-11-29 06:44:37,207 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 1000 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:44:37,207 INFO L413 NwaCegarLoop]: 459 mSDtfsCounter, 639 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 1189 SdHoareTripleChecker+Invalid, 831 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:44:37,208 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [677 Valid, 1189 Invalid, 831 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 06:44:37,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2023-11-29 06:44:37,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1928. [2023-11-29 06:44:37,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1928 states, 1459 states have (on average 1.485263879369431) internal successors, (2167), 1466 states have internal predecessors, (2167), 430 states have call successors, (430), 38 states have call predecessors, (430), 38 states have return successors, (430), 423 states have call predecessors, (430), 430 states have call successors, (430) [2023-11-29 06:44:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 3027 transitions. [2023-11-29 06:44:37,390 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 3027 transitions. Word has length 504 [2023-11-29 06:44:37,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:44:37,391 INFO L495 AbstractCegarLoop]: Abstraction has 1928 states and 3027 transitions. [2023-11-29 06:44:37,391 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 2 states have call successors, (105), 2 states have call predecessors, (105), 4 states have return successors, (106), 2 states have call predecessors, (106), 2 states have call successors, (106) [2023-11-29 06:44:37,391 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 3027 transitions. [2023-11-29 06:44:37,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 505 [2023-11-29 06:44:37,396 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:44:37,396 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:37,403 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:44:37,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 06:44:37,597 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:44:37,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:37,598 INFO L85 PathProgramCache]: Analyzing trace with hash -841651448, now seen corresponding path program 1 times [2023-11-29 06:44:37,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:44:37,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453828386] [2023-11-29 06:44:37,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:37,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:44:37,666 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:44:37,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2087735325] [2023-11-29 06:44:37,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:37,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:37,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:44:37,668 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:44:37,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:44:38,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:38,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:44:38,016 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:44:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 3851 proven. 51 refuted. 0 times theorem prover too weak. 6322 trivial. 0 not checked. [2023-11-29 06:44:38,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:44:38,465 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 162 proven. 51 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-11-29 06:44:38,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:44:38,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453828386] [2023-11-29 06:44:38,466 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:44:38,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087735325] [2023-11-29 06:44:38,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087735325] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:44:38,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:44:38,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-29 06:44:38,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476631498] [2023-11-29 06:44:38,467 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:44:38,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 06:44:38,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:44:38,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 06:44:38,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:44:38,470 INFO L87 Difference]: Start difference. First operand 1928 states and 3027 transitions. Second operand has 8 states, 8 states have (on average 30.875) internal successors, (247), 8 states have internal predecessors, (247), 3 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 3 states have call predecessors, (90), 3 states have call successors, (90) [2023-11-29 06:44:39,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:44:39,005 INFO L93 Difference]: Finished difference Result 3820 states and 5980 transitions. [2023-11-29 06:44:39,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:44:39,006 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 30.875) internal successors, (247), 8 states have internal predecessors, (247), 3 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 3 states have call predecessors, (90), 3 states have call successors, (90) Word has length 504 [2023-11-29 06:44:39,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:44:39,020 INFO L225 Difference]: With dead ends: 3820 [2023-11-29 06:44:39,020 INFO L226 Difference]: Without dead ends: 1966 [2023-11-29 06:44:39,026 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1010 GetRequests, 1000 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:44:39,027 INFO L413 NwaCegarLoop]: 397 mSDtfsCounter, 794 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 848 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 628 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:44:39,027 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [848 Valid, 1043 Invalid, 628 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:44:39,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1966 states. [2023-11-29 06:44:39,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1966 to 1944. [2023-11-29 06:44:39,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1944 states, 1471 states have (on average 1.470428280081577) internal successors, (2163), 1478 states have internal predecessors, (2163), 430 states have call successors, (430), 42 states have call predecessors, (430), 42 states have return successors, (430), 423 states have call predecessors, (430), 430 states have call successors, (430) [2023-11-29 06:44:39,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1944 states to 1944 states and 3023 transitions. [2023-11-29 06:44:39,270 INFO L78 Accepts]: Start accepts. Automaton has 1944 states and 3023 transitions. Word has length 504 [2023-11-29 06:44:39,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:44:39,271 INFO L495 AbstractCegarLoop]: Abstraction has 1944 states and 3023 transitions. [2023-11-29 06:44:39,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 30.875) internal successors, (247), 8 states have internal predecessors, (247), 3 states have call successors, (89), 2 states have call predecessors, (89), 4 states have return successors, (90), 3 states have call predecessors, (90), 3 states have call successors, (90) [2023-11-29 06:44:39,272 INFO L276 IsEmpty]: Start isEmpty. Operand 1944 states and 3023 transitions. [2023-11-29 06:44:39,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-11-29 06:44:39,277 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:44:39,278 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:39,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:44:39,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:39,478 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:44:39,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:39,479 INFO L85 PathProgramCache]: Analyzing trace with hash -120698157, now seen corresponding path program 1 times [2023-11-29 06:44:39,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:44:39,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687517149] [2023-11-29 06:44:39,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:39,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:44:39,541 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:44:39,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1461141685] [2023-11-29 06:44:39,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:39,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:39,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:44:39,542 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:44:39,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:44:39,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:39,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:44:39,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:44:40,414 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 2531 proven. 183 refuted. 0 times theorem prover too weak. 7510 trivial. 0 not checked. [2023-11-29 06:44:40,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:44:40,747 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 30 proven. 183 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-11-29 06:44:40,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:44:40,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687517149] [2023-11-29 06:44:40,748 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:44:40,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461141685] [2023-11-29 06:44:40,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461141685] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:44:40,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:44:40,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-29 06:44:40,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707823538] [2023-11-29 06:44:40,748 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:44:40,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 06:44:40,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:44:40,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 06:44:40,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:44:40,751 INFO L87 Difference]: Start difference. First operand 1944 states and 3023 transitions. Second operand has 8 states, 8 states have (on average 29.75) internal successors, (238), 8 states have internal predecessors, (238), 3 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 3 states have call predecessors, (134), 3 states have call successors, (134) [2023-11-29 06:44:41,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:44:41,352 INFO L93 Difference]: Finished difference Result 3872 states and 5987 transitions. [2023-11-29 06:44:41,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:44:41,353 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 29.75) internal successors, (238), 8 states have internal predecessors, (238), 3 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 3 states have call predecessors, (134), 3 states have call successors, (134) Word has length 505 [2023-11-29 06:44:41,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:44:41,367 INFO L225 Difference]: With dead ends: 3872 [2023-11-29 06:44:41,367 INFO L226 Difference]: Without dead ends: 2002 [2023-11-29 06:44:41,373 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1012 GetRequests, 1002 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 06:44:41,374 INFO L413 NwaCegarLoop]: 390 mSDtfsCounter, 269 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 279 SdHoareTripleChecker+Valid, 1025 SdHoareTripleChecker+Invalid, 432 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:44:41,374 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [279 Valid, 1025 Invalid, 432 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:44:41,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2023-11-29 06:44:41,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1980. [2023-11-29 06:44:41,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1980 states, 1498 states have (on average 1.4566088117489986) internal successors, (2182), 1505 states have internal predecessors, (2182), 430 states have call successors, (430), 51 states have call predecessors, (430), 51 states have return successors, (430), 423 states have call predecessors, (430), 430 states have call successors, (430) [2023-11-29 06:44:41,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1980 states to 1980 states and 3042 transitions. [2023-11-29 06:44:41,624 INFO L78 Accepts]: Start accepts. Automaton has 1980 states and 3042 transitions. Word has length 505 [2023-11-29 06:44:41,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:44:41,625 INFO L495 AbstractCegarLoop]: Abstraction has 1980 states and 3042 transitions. [2023-11-29 06:44:41,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 29.75) internal successors, (238), 8 states have internal predecessors, (238), 3 states have call successors, (133), 2 states have call predecessors, (133), 4 states have return successors, (134), 3 states have call predecessors, (134), 3 states have call successors, (134) [2023-11-29 06:44:41,626 INFO L276 IsEmpty]: Start isEmpty. Operand 1980 states and 3042 transitions. [2023-11-29 06:44:41,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-11-29 06:44:41,631 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:44:41,631 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:41,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 06:44:41,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:41,838 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:44:41,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:41,838 INFO L85 PathProgramCache]: Analyzing trace with hash 313030929, now seen corresponding path program 1 times [2023-11-29 06:44:41,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:44:41,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230323321] [2023-11-29 06:44:41,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:41,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:44:41,906 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:44:41,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832428773] [2023-11-29 06:44:41,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:41,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:41,907 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:44:41,907 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:44:41,913 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:44:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:42,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 06:44:42,270 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:44:42,839 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 4127 proven. 57 refuted. 0 times theorem prover too weak. 6040 trivial. 0 not checked. [2023-11-29 06:44:42,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:44:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 156 proven. 57 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-11-29 06:44:43,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:44:43,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230323321] [2023-11-29 06:44:43,367 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:44:43,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832428773] [2023-11-29 06:44:43,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832428773] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:44:43,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:44:43,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2023-11-29 06:44:43,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722610577] [2023-11-29 06:44:43,368 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:44:43,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 06:44:43,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:44:43,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 06:44:43,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:44:43,372 INFO L87 Difference]: Start difference. First operand 1980 states and 3042 transitions. Second operand has 14 states, 14 states have (on average 14.714285714285714) internal successors, (206), 14 states have internal predecessors, (206), 4 states have call successors, (144), 3 states have call predecessors, (144), 5 states have return successors, (144), 4 states have call predecessors, (144), 4 states have call successors, (144) [2023-11-29 06:44:46,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:44:46,125 INFO L93 Difference]: Finished difference Result 10074 states and 15468 transitions. [2023-11-29 06:44:46,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 06:44:46,126 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 14.714285714285714) internal successors, (206), 14 states have internal predecessors, (206), 4 states have call successors, (144), 3 states have call predecessors, (144), 5 states have return successors, (144), 4 states have call predecessors, (144), 4 states have call successors, (144) Word has length 505 [2023-11-29 06:44:46,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:44:46,168 INFO L225 Difference]: With dead ends: 10074 [2023-11-29 06:44:46,169 INFO L226 Difference]: Without dead ends: 8172 [2023-11-29 06:44:46,174 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1034 GetRequests, 1000 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=340, Invalid=920, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 06:44:46,174 INFO L413 NwaCegarLoop]: 500 mSDtfsCounter, 5069 mSDsluCounter, 3655 mSDsCounter, 0 mSdLazyCounter, 1756 mSolverCounterSat, 1160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5140 SdHoareTripleChecker+Valid, 4155 SdHoareTripleChecker+Invalid, 2916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1160 IncrementalHoareTripleChecker+Valid, 1756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:44:46,174 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5140 Valid, 4155 Invalid, 2916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1160 Valid, 1756 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 06:44:46,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8172 states. [2023-11-29 06:44:46,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8172 to 6580. [2023-11-29 06:44:46,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6580 states, 5203 states have (on average 1.4543532577359215) internal successors, (7567), 5223 states have internal predecessors, (7567), 1226 states have call successors, (1226), 150 states have call predecessors, (1226), 150 states have return successors, (1226), 1206 states have call predecessors, (1226), 1226 states have call successors, (1226) [2023-11-29 06:44:46,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6580 states to 6580 states and 10019 transitions. [2023-11-29 06:44:46,846 INFO L78 Accepts]: Start accepts. Automaton has 6580 states and 10019 transitions. Word has length 505 [2023-11-29 06:44:46,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:44:46,847 INFO L495 AbstractCegarLoop]: Abstraction has 6580 states and 10019 transitions. [2023-11-29 06:44:46,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.714285714285714) internal successors, (206), 14 states have internal predecessors, (206), 4 states have call successors, (144), 3 states have call predecessors, (144), 5 states have return successors, (144), 4 states have call predecessors, (144), 4 states have call successors, (144) [2023-11-29 06:44:46,847 INFO L276 IsEmpty]: Start isEmpty. Operand 6580 states and 10019 transitions. [2023-11-29 06:44:46,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-11-29 06:44:46,851 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:44:46,852 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:46,858 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 06:44:47,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:47,052 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:44:47,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:47,053 INFO L85 PathProgramCache]: Analyzing trace with hash -857720303, now seen corresponding path program 1 times [2023-11-29 06:44:47,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:44:47,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397241659] [2023-11-29 06:44:47,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:47,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:44:47,134 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:44:47,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1406402022] [2023-11-29 06:44:47,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:47,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:47,134 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:44:47,135 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:44:47,141 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:44:47,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:47,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 06:44:47,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:44:48,374 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 5408 proven. 93 refuted. 0 times theorem prover too weak. 4723 trivial. 0 not checked. [2023-11-29 06:44:48,375 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:44:49,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 327 proven. 96 refuted. 0 times theorem prover too weak. 9801 trivial. 0 not checked. [2023-11-29 06:44:49,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:44:49,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397241659] [2023-11-29 06:44:49,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:44:49,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406402022] [2023-11-29 06:44:49,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406402022] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:44:49,485 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:44:49,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2023-11-29 06:44:49,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280403718] [2023-11-29 06:44:49,485 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:44:49,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 06:44:49,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:44:49,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 06:44:49,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2023-11-29 06:44:49,488 INFO L87 Difference]: Start difference. First operand 6580 states and 10019 transitions. Second operand has 17 states, 17 states have (on average 15.470588235294118) internal successors, (263), 17 states have internal predecessors, (263), 5 states have call successors, (101), 3 states have call predecessors, (101), 7 states have return successors, (102), 5 states have call predecessors, (102), 5 states have call successors, (102) [2023-11-29 06:44:51,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:44:51,302 INFO L93 Difference]: Finished difference Result 18549 states and 28176 transitions. [2023-11-29 06:44:51,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 06:44:51,303 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 15.470588235294118) internal successors, (263), 17 states have internal predecessors, (263), 5 states have call successors, (101), 3 states have call predecessors, (101), 7 states have return successors, (102), 5 states have call predecessors, (102), 5 states have call successors, (102) Word has length 505 [2023-11-29 06:44:51,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:44:51,336 INFO L225 Difference]: With dead ends: 18549 [2023-11-29 06:44:51,336 INFO L226 Difference]: Without dead ends: 12047 [2023-11-29 06:44:51,347 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1017 GetRequests, 993 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=432, Unknown=0, NotChecked=0, Total=650 [2023-11-29 06:44:51,347 INFO L413 NwaCegarLoop]: 394 mSDtfsCounter, 823 mSDsluCounter, 1238 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 890 SdHoareTripleChecker+Valid, 1632 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:44:51,347 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [890 Valid, 1632 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 06:44:51,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12047 states. [2023-11-29 06:44:52,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12047 to 11881. [2023-11-29 06:44:52,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11881 states, 9828 states have (on average 1.455942205942206) internal successors, (14309), 9872 states have internal predecessors, (14309), 1802 states have call successors, (1802), 250 states have call predecessors, (1802), 250 states have return successors, (1802), 1758 states have call predecessors, (1802), 1802 states have call successors, (1802) [2023-11-29 06:44:52,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11881 states to 11881 states and 17913 transitions. [2023-11-29 06:44:52,169 INFO L78 Accepts]: Start accepts. Automaton has 11881 states and 17913 transitions. Word has length 505 [2023-11-29 06:44:52,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:44:52,170 INFO L495 AbstractCegarLoop]: Abstraction has 11881 states and 17913 transitions. [2023-11-29 06:44:52,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.470588235294118) internal successors, (263), 17 states have internal predecessors, (263), 5 states have call successors, (101), 3 states have call predecessors, (101), 7 states have return successors, (102), 5 states have call predecessors, (102), 5 states have call successors, (102) [2023-11-29 06:44:52,170 INFO L276 IsEmpty]: Start isEmpty. Operand 11881 states and 17913 transitions. [2023-11-29 06:44:52,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-11-29 06:44:52,176 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:44:52,177 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:52,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 06:44:52,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:52,377 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:44:52,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:52,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1367193393, now seen corresponding path program 1 times [2023-11-29 06:44:52,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:44:52,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657863861] [2023-11-29 06:44:52,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:52,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:44:52,431 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:44:52,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1446588772] [2023-11-29 06:44:52,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:52,432 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:52,432 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:44:52,433 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:44:52,437 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:44:52,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:44:52,881 INFO L262 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 06:44:52,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:44:53,518 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-29 06:44:53,518 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:44:53,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:44:53,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657863861] [2023-11-29 06:44:53,519 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:44:53,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446588772] [2023-11-29 06:44:53,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446588772] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:44:53,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:44:53,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 06:44:53,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941266631] [2023-11-29 06:44:53,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:44:53,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:44:53,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:44:53,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:44:53,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:44:53,522 INFO L87 Difference]: Start difference. First operand 11881 states and 17913 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 06:44:57,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:44:57,372 INFO L93 Difference]: Finished difference Result 53556 states and 80867 transitions. [2023-11-29 06:44:57,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:44:57,373 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 505 [2023-11-29 06:44:57,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:44:57,454 INFO L225 Difference]: With dead ends: 53556 [2023-11-29 06:44:57,454 INFO L226 Difference]: Without dead ends: 41753 [2023-11-29 06:44:57,476 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 510 GetRequests, 503 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2023-11-29 06:44:57,477 INFO L413 NwaCegarLoop]: 641 mSDtfsCounter, 1976 mSDsluCounter, 1835 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 256 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1976 SdHoareTripleChecker+Valid, 2476 SdHoareTripleChecker+Invalid, 899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 256 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:44:57,477 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1976 Valid, 2476 Invalid, 899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [256 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 06:44:57,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41753 states. [2023-11-29 06:44:59,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41753 to 29367. [2023-11-29 06:44:59,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29367 states, 25846 states have (on average 1.5028631122804303) internal successors, (38843), 25944 states have internal predecessors, (38843), 3086 states have call successors, (3086), 434 states have call predecessors, (3086), 434 states have return successors, (3086), 2988 states have call predecessors, (3086), 3086 states have call successors, (3086) [2023-11-29 06:44:59,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29367 states to 29367 states and 45015 transitions. [2023-11-29 06:44:59,479 INFO L78 Accepts]: Start accepts. Automaton has 29367 states and 45015 transitions. Word has length 505 [2023-11-29 06:44:59,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:44:59,479 INFO L495 AbstractCegarLoop]: Abstraction has 29367 states and 45015 transitions. [2023-11-29 06:44:59,480 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 6 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 06:44:59,480 INFO L276 IsEmpty]: Start isEmpty. Operand 29367 states and 45015 transitions. [2023-11-29 06:44:59,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-11-29 06:44:59,493 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:44:59,493 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:44:59,502 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 06:44:59,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 06:44:59,694 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:44:59,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:44:59,694 INFO L85 PathProgramCache]: Analyzing trace with hash 233877713, now seen corresponding path program 1 times [2023-11-29 06:44:59,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:44:59,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237675834] [2023-11-29 06:44:59,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:59,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:44:59,755 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:44:59,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1194002146] [2023-11-29 06:44:59,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:44:59,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:44:59,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:44:59,757 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:44:59,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:45:00,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:45:00,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 1268 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-29 06:45:00,152 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:45:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-29 06:45:00,484 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:45:00,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:45:00,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237675834] [2023-11-29 06:45:00,484 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:45:00,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194002146] [2023-11-29 06:45:00,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194002146] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:45:00,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:45:00,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:45:00,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164106636] [2023-11-29 06:45:00,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:45:00,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:45:00,486 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:45:00,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:45:00,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:45:00,488 INFO L87 Difference]: Start difference. First operand 29367 states and 45015 transitions. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 06:45:03,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:45:03,981 INFO L93 Difference]: Finished difference Result 68933 states and 104570 transitions. [2023-11-29 06:45:03,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:45:03,982 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 505 [2023-11-29 06:45:03,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:45:04,122 INFO L225 Difference]: With dead ends: 68933 [2023-11-29 06:45:04,122 INFO L226 Difference]: Without dead ends: 39644 [2023-11-29 06:45:04,152 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 503 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:45:04,152 INFO L413 NwaCegarLoop]: 652 mSDtfsCounter, 1224 mSDsluCounter, 1846 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1224 SdHoareTripleChecker+Valid, 2498 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 06:45:04,153 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1224 Valid, 2498 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 06:45:04,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39644 states. [2023-11-29 06:45:05,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39644 to 23512. [2023-11-29 06:45:05,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23512 states, 20683 states have (on average 1.5050524585408307) internal successors, (31129), 20755 states have internal predecessors, (31129), 2454 states have call successors, (2454), 374 states have call predecessors, (2454), 374 states have return successors, (2454), 2382 states have call predecessors, (2454), 2454 states have call successors, (2454) [2023-11-29 06:45:05,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23512 states to 23512 states and 36037 transitions. [2023-11-29 06:45:05,911 INFO L78 Accepts]: Start accepts. Automaton has 23512 states and 36037 transitions. Word has length 505 [2023-11-29 06:45:05,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:45:05,912 INFO L495 AbstractCegarLoop]: Abstraction has 23512 states and 36037 transitions. [2023-11-29 06:45:05,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 06:45:05,912 INFO L276 IsEmpty]: Start isEmpty. Operand 23512 states and 36037 transitions. [2023-11-29 06:45:05,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-11-29 06:45:05,920 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:45:05,920 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:45:05,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 06:45:06,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 06:45:06,121 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:45:06,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:45:06,121 INFO L85 PathProgramCache]: Analyzing trace with hash -336152495, now seen corresponding path program 1 times [2023-11-29 06:45:06,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:45:06,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764609941] [2023-11-29 06:45:06,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:45:06,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:45:06,167 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:45:06,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [340754816] [2023-11-29 06:45:06,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:45:06,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:45:06,168 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:45:06,168 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:45:06,173 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:45:06,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:45:06,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 06:45:06,623 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:45:06,814 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-29 06:45:06,814 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:45:06,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:45:06,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764609941] [2023-11-29 06:45:06,814 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:45:06,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340754816] [2023-11-29 06:45:06,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340754816] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:45:06,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:45:06,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:45:06,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288043520] [2023-11-29 06:45:06,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:45:06,816 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:45:06,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:45:06,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:45:06,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:45:06,818 INFO L87 Difference]: Start difference. First operand 23512 states and 36037 transitions. Second operand has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 06:45:10,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:45:10,177 INFO L93 Difference]: Finished difference Result 75005 states and 114560 transitions. [2023-11-29 06:45:10,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 06:45:10,178 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 505 [2023-11-29 06:45:10,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:45:10,276 INFO L225 Difference]: With dead ends: 75005 [2023-11-29 06:45:10,277 INFO L226 Difference]: Without dead ends: 51571 [2023-11-29 06:45:10,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 502 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 06:45:10,315 INFO L413 NwaCegarLoop]: 494 mSDtfsCounter, 1755 mSDsluCounter, 1057 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 169 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1755 SdHoareTripleChecker+Valid, 1551 SdHoareTripleChecker+Invalid, 575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 169 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 06:45:10,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1755 Valid, 1551 Invalid, 575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [169 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 06:45:10,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51571 states. [2023-11-29 06:45:12,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51571 to 35972. [2023-11-29 06:45:12,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35972 states, 32395 states have (on average 1.5176416113597777) internal successors, (49164), 32501 states have internal predecessors, (49164), 3134 states have call successors, (3134), 442 states have call predecessors, (3134), 442 states have return successors, (3134), 3028 states have call predecessors, (3134), 3134 states have call successors, (3134) [2023-11-29 06:45:12,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35972 states to 35972 states and 55432 transitions. [2023-11-29 06:45:12,623 INFO L78 Accepts]: Start accepts. Automaton has 35972 states and 55432 transitions. Word has length 505 [2023-11-29 06:45:12,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:45:12,624 INFO L495 AbstractCegarLoop]: Abstraction has 35972 states and 55432 transitions. [2023-11-29 06:45:12,624 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.6) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 06:45:12,625 INFO L276 IsEmpty]: Start isEmpty. Operand 35972 states and 55432 transitions. [2023-11-29 06:45:12,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-11-29 06:45:12,637 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:45:12,637 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:45:12,644 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 06:45:12,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 06:45:12,838 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:45:12,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:45:12,838 INFO L85 PathProgramCache]: Analyzing trace with hash -259251697, now seen corresponding path program 1 times [2023-11-29 06:45:12,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:45:12,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569648213] [2023-11-29 06:45:12,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:45:12,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:45:12,888 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:45:12,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [790814269] [2023-11-29 06:45:12,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:45:12,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:45:12,889 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:45:12,890 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:45:12,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 06:45:13,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:45:13,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:45:13,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:45:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 4191 proven. 153 refuted. 0 times theorem prover too weak. 5880 trivial. 0 not checked. [2023-11-29 06:45:13,640 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:45:13,900 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 60 proven. 153 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-11-29 06:45:13,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:45:13,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569648213] [2023-11-29 06:45:13,900 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:45:13,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790814269] [2023-11-29 06:45:13,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790814269] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:45:13,901 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:45:13,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-29 06:45:13,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643146563] [2023-11-29 06:45:13,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:45:13,902 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 06:45:13,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:45:13,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 06:45:13,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:45:13,903 INFO L87 Difference]: Start difference. First operand 35972 states and 55432 transitions. Second operand has 8 states, 8 states have (on average 19.625) internal successors, (157), 8 states have internal predecessors, (157), 2 states have call successors, (123), 2 states have call predecessors, (123), 4 states have return successors, (124), 2 states have call predecessors, (124), 2 states have call successors, (124) [2023-11-29 06:45:18,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:45:18,174 INFO L93 Difference]: Finished difference Result 95033 states and 144131 transitions. [2023-11-29 06:45:18,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 06:45:18,174 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.625) internal successors, (157), 8 states have internal predecessors, (157), 2 states have call successors, (123), 2 states have call predecessors, (123), 4 states have return successors, (124), 2 states have call predecessors, (124), 2 states have call successors, (124) Word has length 505 [2023-11-29 06:45:18,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:45:18,256 INFO L225 Difference]: With dead ends: 95033 [2023-11-29 06:45:18,257 INFO L226 Difference]: Without dead ends: 59070 [2023-11-29 06:45:18,284 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1019 GetRequests, 1001 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:45:18,285 INFO L413 NwaCegarLoop]: 556 mSDtfsCounter, 846 mSDsluCounter, 1192 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 157 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 867 SdHoareTripleChecker+Valid, 1748 SdHoareTripleChecker+Invalid, 1100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 157 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 06:45:18,285 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [867 Valid, 1748 Invalid, 1100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [157 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 06:45:18,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59070 states. [2023-11-29 06:45:22,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59070 to 58518. [2023-11-29 06:45:22,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58518 states, 51255 states have (on average 1.4688908399180567) internal successors, (75288), 51466 states have internal predecessors, (75288), 6230 states have call successors, (6230), 1032 states have call predecessors, (6230), 1032 states have return successors, (6230), 6019 states have call predecessors, (6230), 6230 states have call successors, (6230) [2023-11-29 06:45:22,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58518 states to 58518 states and 87748 transitions. [2023-11-29 06:45:22,763 INFO L78 Accepts]: Start accepts. Automaton has 58518 states and 87748 transitions. Word has length 505 [2023-11-29 06:45:22,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:45:22,764 INFO L495 AbstractCegarLoop]: Abstraction has 58518 states and 87748 transitions. [2023-11-29 06:45:22,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.625) internal successors, (157), 8 states have internal predecessors, (157), 2 states have call successors, (123), 2 states have call predecessors, (123), 4 states have return successors, (124), 2 states have call predecessors, (124), 2 states have call successors, (124) [2023-11-29 06:45:22,764 INFO L276 IsEmpty]: Start isEmpty. Operand 58518 states and 87748 transitions. [2023-11-29 06:45:22,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-11-29 06:45:22,780 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:45:22,780 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:45:22,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-29 06:45:22,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:45:22,981 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:45:22,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:45:22,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1858845649, now seen corresponding path program 1 times [2023-11-29 06:45:22,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:45:22,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932922044] [2023-11-29 06:45:22,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:45:22,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:45:23,024 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:45:23,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2020083974] [2023-11-29 06:45:23,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:45:23,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:45:23,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:45:23,026 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:45:23,027 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 06:45:23,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:45:23,361 INFO L262 TraceCheckSpWp]: Trace formula consists of 1266 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 06:45:23,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:45:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-29 06:45:24,451 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:45:24,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:45:24,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932922044] [2023-11-29 06:45:24,452 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:45:24,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020083974] [2023-11-29 06:45:24,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020083974] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:45:24,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:45:24,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:45:24,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069639273] [2023-11-29 06:45:24,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:45:24,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:45:24,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:45:24,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:45:24,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:45:24,454 INFO L87 Difference]: Start difference. First operand 58518 states and 87748 transitions. Second operand has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 06:45:31,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:45:31,547 INFO L93 Difference]: Finished difference Result 143079 states and 213201 transitions. [2023-11-29 06:45:31,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:45:31,548 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 505 [2023-11-29 06:45:31,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:45:31,679 INFO L225 Difference]: With dead ends: 143079 [2023-11-29 06:45:31,680 INFO L226 Difference]: Without dead ends: 84643 [2023-11-29 06:45:31,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 500 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 06:45:31,726 INFO L413 NwaCegarLoop]: 629 mSDtfsCounter, 2152 mSDsluCounter, 1762 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2152 SdHoareTripleChecker+Valid, 2391 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:45:31,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2152 Valid, 2391 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 06:45:31,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84643 states. [2023-11-29 06:45:37,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84643 to 75619. [2023-11-29 06:45:37,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75619 states, 65065 states have (on average 1.4471374779067088) internal successors, (94158), 65361 states have internal predecessors, (94158), 8998 states have call successors, (8998), 1555 states have call predecessors, (8998), 1555 states have return successors, (8998), 8702 states have call predecessors, (8998), 8998 states have call successors, (8998) [2023-11-29 06:45:37,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75619 states to 75619 states and 112154 transitions. [2023-11-29 06:45:37,266 INFO L78 Accepts]: Start accepts. Automaton has 75619 states and 112154 transitions. Word has length 505 [2023-11-29 06:45:37,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:45:37,267 INFO L495 AbstractCegarLoop]: Abstraction has 75619 states and 112154 transitions. [2023-11-29 06:45:37,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.666666666666668) internal successors, (148), 5 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 06:45:37,267 INFO L276 IsEmpty]: Start isEmpty. Operand 75619 states and 112154 transitions. [2023-11-29 06:45:37,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-11-29 06:45:37,280 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:45:37,280 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:45:37,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 06:45:37,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 06:45:37,481 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:45:37,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:45:37,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1935746447, now seen corresponding path program 1 times [2023-11-29 06:45:37,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:45:37,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528201822] [2023-11-29 06:45:37,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:45:37,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:45:37,531 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:45:37,531 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1837040315] [2023-11-29 06:45:37,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:45:37,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:45:37,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:45:37,533 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:45:37,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 06:45:37,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:45:37,967 INFO L262 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 33 conjunts are in the unsatisfiable core [2023-11-29 06:45:37,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:45:40,592 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 3366 proven. 702 refuted. 0 times theorem prover too weak. 6156 trivial. 0 not checked. [2023-11-29 06:45:40,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:45:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 93 proven. 330 refuted. 0 times theorem prover too weak. 9801 trivial. 0 not checked. [2023-11-29 06:45:42,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:45:42,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528201822] [2023-11-29 06:45:42,088 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:45:42,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837040315] [2023-11-29 06:45:42,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837040315] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:45:42,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:45:42,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16] total 33 [2023-11-29 06:45:42,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96138968] [2023-11-29 06:45:42,089 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:45:42,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 06:45:42,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:45:42,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 06:45:42,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 06:45:42,092 INFO L87 Difference]: Start difference. First operand 75619 states and 112154 transitions. Second operand has 33 states, 31 states have (on average 9.35483870967742) internal successors, (290), 29 states have internal predecessors, (290), 8 states have call successors, (144), 5 states have call predecessors, (144), 9 states have return successors, (144), 8 states have call predecessors, (144), 8 states have call successors, (144) [2023-11-29 06:46:44,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:46:44,777 INFO L93 Difference]: Finished difference Result 637735 states and 926468 transitions. [2023-11-29 06:46:44,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2023-11-29 06:46:44,778 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 31 states have (on average 9.35483870967742) internal successors, (290), 29 states have internal predecessors, (290), 8 states have call successors, (144), 5 states have call predecessors, (144), 9 states have return successors, (144), 8 states have call predecessors, (144), 8 states have call successors, (144) Word has length 505 [2023-11-29 06:46:44,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:46:46,236 INFO L225 Difference]: With dead ends: 637735 [2023-11-29 06:46:46,236 INFO L226 Difference]: Without dead ends: 557851 [2023-11-29 06:46:46,387 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1228 GetRequests, 1026 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15882 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=9389, Invalid=32023, Unknown=0, NotChecked=0, Total=41412 [2023-11-29 06:46:46,388 INFO L413 NwaCegarLoop]: 503 mSDtfsCounter, 5331 mSDsluCounter, 8453 mSDsCounter, 0 mSdLazyCounter, 6532 mSolverCounterSat, 1030 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5417 SdHoareTripleChecker+Valid, 8956 SdHoareTripleChecker+Invalid, 7562 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1030 IncrementalHoareTripleChecker+Valid, 6532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:46:46,388 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5417 Valid, 8956 Invalid, 7562 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1030 Valid, 6532 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2023-11-29 06:46:46,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557851 states. [2023-11-29 06:47:11,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557851 to 209559. [2023-11-29 06:47:11,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209559 states, 179130 states have (on average 1.4221961703790542) internal successors, (254758), 180033 states have internal predecessors, (254758), 24330 states have call successors, (24330), 6098 states have call predecessors, (24330), 6098 states have return successors, (24330), 23427 states have call predecessors, (24330), 24330 states have call successors, (24330) [2023-11-29 06:47:12,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209559 states to 209559 states and 303418 transitions. [2023-11-29 06:47:12,868 INFO L78 Accepts]: Start accepts. Automaton has 209559 states and 303418 transitions. Word has length 505 [2023-11-29 06:47:12,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:47:12,869 INFO L495 AbstractCegarLoop]: Abstraction has 209559 states and 303418 transitions. [2023-11-29 06:47:12,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 31 states have (on average 9.35483870967742) internal successors, (290), 29 states have internal predecessors, (290), 8 states have call successors, (144), 5 states have call predecessors, (144), 9 states have return successors, (144), 8 states have call predecessors, (144), 8 states have call successors, (144) [2023-11-29 06:47:12,869 INFO L276 IsEmpty]: Start isEmpty. Operand 209559 states and 303418 transitions. [2023-11-29 06:47:12,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-11-29 06:47:12,893 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:47:12,893 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:47:12,901 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 06:47:13,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 06:47:13,094 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:47:13,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:47:13,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2111074355, now seen corresponding path program 1 times [2023-11-29 06:47:13,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:47:13,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579854665] [2023-11-29 06:47:13,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:47:13,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:47:13,144 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:47:13,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1971096691] [2023-11-29 06:47:13,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:47:13,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:47:13,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:47:13,146 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:47:13,147 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 06:47:13,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:47:13,674 INFO L262 TraceCheckSpWp]: Trace formula consists of 1267 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 06:47:13,680 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:47:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 3629 proven. 492 refuted. 0 times theorem prover too weak. 6103 trivial. 0 not checked. [2023-11-29 06:47:16,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:47:18,289 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 129 proven. 501 refuted. 0 times theorem prover too weak. 9594 trivial. 0 not checked. [2023-11-29 06:47:18,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:47:18,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579854665] [2023-11-29 06:47:18,289 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:47:18,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971096691] [2023-11-29 06:47:18,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971096691] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:47:18,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:47:18,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 32 [2023-11-29 06:47:18,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472402541] [2023-11-29 06:47:18,290 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:47:18,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2023-11-29 06:47:18,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:47:18,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2023-11-29 06:47:18,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2023-11-29 06:47:18,292 INFO L87 Difference]: Start difference. First operand 209559 states and 303418 transitions. Second operand has 32 states, 31 states have (on average 8.35483870967742) internal successors, (259), 30 states have internal predecessors, (259), 8 states have call successors, (144), 5 states have call predecessors, (144), 10 states have return successors, (144), 8 states have call predecessors, (144), 8 states have call successors, (144) [2023-11-29 06:48:40,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:48:40,355 INFO L93 Difference]: Finished difference Result 1028258 states and 1499561 transitions. [2023-11-29 06:48:40,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-11-29 06:48:40,356 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 8.35483870967742) internal successors, (259), 30 states have internal predecessors, (259), 8 states have call successors, (144), 5 states have call predecessors, (144), 10 states have return successors, (144), 8 states have call predecessors, (144), 8 states have call successors, (144) Word has length 505 [2023-11-29 06:48:40,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:48:42,274 INFO L225 Difference]: With dead ends: 1028258 [2023-11-29 06:48:42,274 INFO L226 Difference]: Without dead ends: 818797 [2023-11-29 06:48:42,540 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1104 GetRequests, 989 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4853 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3189, Invalid=10383, Unknown=0, NotChecked=0, Total=13572 [2023-11-29 06:48:42,541 INFO L413 NwaCegarLoop]: 581 mSDtfsCounter, 7990 mSDsluCounter, 12463 mSDsCounter, 0 mSdLazyCounter, 7374 mSolverCounterSat, 1704 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7991 SdHoareTripleChecker+Valid, 13044 SdHoareTripleChecker+Invalid, 9078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 1704 IncrementalHoareTripleChecker+Valid, 7374 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2023-11-29 06:48:42,541 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7991 Valid, 13044 Invalid, 9078 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [1704 Valid, 7374 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2023-11-29 06:48:43,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 818797 states. [2023-11-29 06:49:22,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 818797 to 303686. [2023-11-29 06:49:23,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303686 states, 262659 states have (on average 1.426895708884904) internal successors, (374787), 263931 states have internal predecessors, (374787), 32034 states have call successors, (32034), 8992 states have call predecessors, (32034), 8992 states have return successors, (32034), 30762 states have call predecessors, (32034), 32034 states have call successors, (32034) [2023-11-29 06:49:24,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303686 states to 303686 states and 438855 transitions. [2023-11-29 06:49:24,512 INFO L78 Accepts]: Start accepts. Automaton has 303686 states and 438855 transitions. Word has length 505 [2023-11-29 06:49:24,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:49:24,513 INFO L495 AbstractCegarLoop]: Abstraction has 303686 states and 438855 transitions. [2023-11-29 06:49:24,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 8.35483870967742) internal successors, (259), 30 states have internal predecessors, (259), 8 states have call successors, (144), 5 states have call predecessors, (144), 10 states have return successors, (144), 8 states have call predecessors, (144), 8 states have call successors, (144) [2023-11-29 06:49:24,513 INFO L276 IsEmpty]: Start isEmpty. Operand 303686 states and 438855 transitions. [2023-11-29 06:49:24,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 506 [2023-11-29 06:49:24,559 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:49:24,560 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:49:24,569 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 06:49:24,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:49:24,760 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:49:24,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:49:24,761 INFO L85 PathProgramCache]: Analyzing trace with hash -395007025, now seen corresponding path program 1 times [2023-11-29 06:49:24,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:49:24,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143841839] [2023-11-29 06:49:24,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:49:24,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:49:24,826 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:49:24,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587281604] [2023-11-29 06:49:24,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:49:24,827 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:49:24,827 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:49:24,828 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:49:24,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 06:49:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:49:25,495 INFO L262 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-29 06:49:25,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:49:25,968 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 10224 trivial. 0 not checked. [2023-11-29 06:49:25,968 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:49:25,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:49:25,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143841839] [2023-11-29 06:49:25,968 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:49:25,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587281604] [2023-11-29 06:49:25,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587281604] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:49:25,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:49:25,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:49:25,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168960008] [2023-11-29 06:49:25,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:49:25,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:49:25,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:49:25,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:49:25,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:49:25,971 INFO L87 Difference]: Start difference. First operand 303686 states and 438855 transitions. Second operand has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 06:49:59,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:49:59,479 INFO L93 Difference]: Finished difference Result 415094 states and 603753 transitions. [2023-11-29 06:49:59,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:49:59,480 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) Word has length 505 [2023-11-29 06:49:59,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:50:00,241 INFO L225 Difference]: With dead ends: 415094 [2023-11-29 06:50:00,242 INFO L226 Difference]: Without dead ends: 339557 [2023-11-29 06:50:00,331 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 505 GetRequests, 502 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 06:50:00,332 INFO L413 NwaCegarLoop]: 475 mSDtfsCounter, 384 mSDsluCounter, 944 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 1419 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:50:00,332 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 1419 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:50:00,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339557 states. [2023-11-29 06:50:35,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339557 to 302228. [2023-11-29 06:50:35,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302228 states, 261479 states have (on average 1.427059151977788) internal successors, (373146), 262741 states have internal predecessors, (373146), 31826 states have call successors, (31826), 8922 states have call predecessors, (31826), 8922 states have return successors, (31826), 30564 states have call predecessors, (31826), 31826 states have call successors, (31826) [2023-11-29 06:50:37,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302228 states to 302228 states and 436798 transitions. [2023-11-29 06:50:37,127 INFO L78 Accepts]: Start accepts. Automaton has 302228 states and 436798 transitions. Word has length 505 [2023-11-29 06:50:37,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:50:37,128 INFO L495 AbstractCegarLoop]: Abstraction has 302228 states and 436798 transitions. [2023-11-29 06:50:37,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 37.0) internal successors, (148), 3 states have internal predecessors, (148), 1 states have call successors, (72), 1 states have call predecessors, (72), 1 states have return successors, (72), 1 states have call predecessors, (72), 1 states have call successors, (72) [2023-11-29 06:50:37,128 INFO L276 IsEmpty]: Start isEmpty. Operand 302228 states and 436798 transitions. [2023-11-29 06:50:37,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2023-11-29 06:50:37,174 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:50:37,174 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:50:37,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-29 06:50:37,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:37,375 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:50:37,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:50:37,376 INFO L85 PathProgramCache]: Analyzing trace with hash -336929992, now seen corresponding path program 1 times [2023-11-29 06:50:37,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:50:37,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464931536] [2023-11-29 06:50:37,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:37,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:50:37,432 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:50:37,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1709820289] [2023-11-29 06:50:37,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:50:37,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:50:37,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:50:37,434 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:50:37,435 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 06:50:37,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:50:37,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 1272 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 06:50:37,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:50:39,232 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 2168 proven. 372 refuted. 0 times theorem prover too weak. 7684 trivial. 0 not checked. [2023-11-29 06:50:39,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:50:39,959 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 24 proven. 189 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-11-29 06:50:39,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:50:39,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464931536] [2023-11-29 06:50:39,960 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:50:39,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709820289] [2023-11-29 06:50:39,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1709820289] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:50:39,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:50:39,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6] total 13 [2023-11-29 06:50:39,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800752272] [2023-11-29 06:50:39,961 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:50:39,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 06:50:39,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:50:39,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 06:50:39,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:50:39,963 INFO L87 Difference]: Start difference. First operand 302228 states and 436798 transitions. Second operand has 13 states, 13 states have (on average 18.23076923076923) internal successors, (237), 12 states have internal predecessors, (237), 4 states have call successors, (135), 3 states have call predecessors, (135), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) [2023-11-29 06:51:48,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:51:48,194 INFO L93 Difference]: Finished difference Result 1070615 states and 1557671 transitions. [2023-11-29 06:51:48,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 06:51:48,195 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 18.23076923076923) internal successors, (237), 12 states have internal predecessors, (237), 4 states have call successors, (135), 3 states have call predecessors, (135), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) Word has length 506 [2023-11-29 06:51:48,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:51:49,797 INFO L225 Difference]: With dead ends: 1070615 [2023-11-29 06:51:49,797 INFO L226 Difference]: Without dead ends: 768569 [2023-11-29 06:51:50,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1023 GetRequests, 999 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=207, Invalid=393, Unknown=0, NotChecked=0, Total=600 [2023-11-29 06:51:50,255 INFO L413 NwaCegarLoop]: 393 mSDtfsCounter, 1327 mSDsluCounter, 2023 mSDsCounter, 0 mSdLazyCounter, 1228 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1343 SdHoareTripleChecker+Valid, 2416 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 1228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:51:50,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1343 Valid, 2416 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 1228 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 06:51:50,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768569 states. [2023-11-29 06:52:46,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768569 to 535820. [2023-11-29 06:52:46,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535820 states, 480856 states have (on average 1.4373825012061823) internal successors, (691174), 483410 states have internal predecessors, (691174), 42162 states have call successors, (42162), 12801 states have call predecessors, (42162), 12801 states have return successors, (42162), 39608 states have call predecessors, (42162), 42162 states have call successors, (42162) [2023-11-29 06:52:48,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535820 states to 535820 states and 775498 transitions. [2023-11-29 06:52:48,157 INFO L78 Accepts]: Start accepts. Automaton has 535820 states and 775498 transitions. Word has length 506 [2023-11-29 06:52:48,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:52:48,158 INFO L495 AbstractCegarLoop]: Abstraction has 535820 states and 775498 transitions. [2023-11-29 06:52:48,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.23076923076923) internal successors, (237), 12 states have internal predecessors, (237), 4 states have call successors, (135), 3 states have call predecessors, (135), 5 states have return successors, (136), 4 states have call predecessors, (136), 4 states have call successors, (136) [2023-11-29 06:52:48,158 INFO L276 IsEmpty]: Start isEmpty. Operand 535820 states and 775498 transitions. [2023-11-29 06:52:48,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2023-11-29 06:52:48,471 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:52:48,471 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:52:48,479 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 06:52:48,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 06:52:48,672 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:52:48,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:52:48,673 INFO L85 PathProgramCache]: Analyzing trace with hash -94837128, now seen corresponding path program 1 times [2023-11-29 06:52:48,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:52:48,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750459846] [2023-11-29 06:52:48,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:48,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:52:48,721 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:52:48,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1591939082] [2023-11-29 06:52:48,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:52:48,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:52:48,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:52:48,723 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:52:48,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 06:52:49,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:52:49,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-29 06:52:49,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:52:54,402 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 6452 proven. 936 refuted. 0 times theorem prover too weak. 2836 trivial. 0 not checked. [2023-11-29 06:52:54,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:53:19,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:53:19,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750459846] [2023-11-29 06:53:19,544 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:53:19,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591939082] [2023-11-29 06:53:19,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591939082] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 06:53:19,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:53:19,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2023-11-29 06:53:19,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931762313] [2023-11-29 06:53:19,544 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-29 06:53:19,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-29 06:53:19,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:53:19,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-29 06:53:19,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=2423, Unknown=1, NotChecked=0, Total=2970 [2023-11-29 06:53:19,547 INFO L87 Difference]: Start difference. First operand 535820 states and 775498 transitions. Second operand has 31 states, 31 states have (on average 5.774193548387097) internal successors, (179), 27 states have internal predecessors, (179), 9 states have call successors, (72), 9 states have call predecessors, (72), 11 states have return successors, (72), 9 states have call predecessors, (72), 9 states have call successors, (72) [2023-11-29 06:55:05,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:55:05,158 INFO L93 Difference]: Finished difference Result 1325315 states and 1905871 transitions. [2023-11-29 06:55:05,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-11-29 06:55:05,159 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.774193548387097) internal successors, (179), 27 states have internal predecessors, (179), 9 states have call successors, (72), 9 states have call predecessors, (72), 11 states have return successors, (72), 9 states have call predecessors, (72), 9 states have call successors, (72) Word has length 506 [2023-11-29 06:55:05,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:55:06,809 INFO L225 Difference]: With dead ends: 1325315 [2023-11-29 06:55:06,810 INFO L226 Difference]: Without dead ends: 789689 [2023-11-29 06:55:07,318 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 986 GetRequests, 869 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3974 ImplicationChecksByTransitivity, 30.7s TimeCoverageRelationStatistics Valid=2935, Invalid=11106, Unknown=1, NotChecked=0, Total=14042 [2023-11-29 06:55:07,319 INFO L413 NwaCegarLoop]: 524 mSDtfsCounter, 2711 mSDsluCounter, 4884 mSDsCounter, 0 mSdLazyCounter, 4795 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2726 SdHoareTripleChecker+Valid, 5408 SdHoareTripleChecker+Invalid, 5187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 4795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:55:07,319 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2726 Valid, 5408 Invalid, 5187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 4795 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2023-11-29 06:55:07,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 789689 states. [2023-11-29 06:55:58,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 789689 to 462854. [2023-11-29 06:55:59,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462854 states, 420457 states have (on average 1.4317349931146348) internal successors, (601983), 422215 states have internal predecessors, (601983), 30933 states have call successors, (30933), 11463 states have call predecessors, (30933), 11463 states have return successors, (30933), 29175 states have call predecessors, (30933), 30933 states have call successors, (30933) [2023-11-29 06:56:00,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462854 states to 462854 states and 663849 transitions. [2023-11-29 06:56:00,487 INFO L78 Accepts]: Start accepts. Automaton has 462854 states and 663849 transitions. Word has length 506 [2023-11-29 06:56:00,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:56:00,488 INFO L495 AbstractCegarLoop]: Abstraction has 462854 states and 663849 transitions. [2023-11-29 06:56:00,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.774193548387097) internal successors, (179), 27 states have internal predecessors, (179), 9 states have call successors, (72), 9 states have call predecessors, (72), 11 states have return successors, (72), 9 states have call predecessors, (72), 9 states have call successors, (72) [2023-11-29 06:56:00,488 INFO L276 IsEmpty]: Start isEmpty. Operand 462854 states and 663849 transitions. [2023-11-29 06:56:00,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 507 [2023-11-29 06:56:00,543 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:56:00,543 INFO L195 NwaCegarLoop]: trace histogram [72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:56:00,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 06:56:00,743 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 06:56:00,744 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:56:00,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:56:00,745 INFO L85 PathProgramCache]: Analyzing trace with hash 153309366, now seen corresponding path program 1 times [2023-11-29 06:56:00,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:56:00,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728207243] [2023-11-29 06:56:00,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:56:00,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:56:00,790 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:56:00,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [368407090] [2023-11-29 06:56:00,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:56:00,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:56:00,790 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:56:00,791 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:56:00,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2fb84adb-a607-4e6f-9514-ff5f4a0a5c39/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 06:56:01,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:56:01,575 INFO L262 TraceCheckSpWp]: Trace formula consists of 1269 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 06:56:01,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:56:03,050 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 6569 proven. 312 refuted. 0 times theorem prover too weak. 3343 trivial. 0 not checked. [2023-11-29 06:56:03,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:56:03,928 INFO L134 CoverageAnalysis]: Checked inductivity of 10224 backedges. 120 proven. 93 refuted. 0 times theorem prover too weak. 10011 trivial. 0 not checked. [2023-11-29 06:56:03,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:56:03,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728207243] [2023-11-29 06:56:03,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:56:03,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368407090] [2023-11-29 06:56:03,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368407090] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:56:03,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:56:03,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 20 [2023-11-29 06:56:03,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938114920] [2023-11-29 06:56:03,930 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:56:03,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 06:56:03,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:56:03,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 06:56:03,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:56:03,932 INFO L87 Difference]: Start difference. First operand 462854 states and 663849 transitions. Second operand has 20 states, 20 states have (on average 13.95) internal successors, (279), 19 states have internal predecessors, (279), 5 states have call successors, (118), 4 states have call predecessors, (118), 7 states have return successors, (119), 5 states have call predecessors, (119), 5 states have call successors, (119)