./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-a_file-13.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-a_file-13.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl --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 e6d92a25ae36f7e711770b5cc6315f0210bbc7c0c024aaddffcd3216b7942769 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 02:26:45,578 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 02:26:45,682 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-12 02:26:45,690 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 02:26:45,691 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 02:26:45,726 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 02:26:45,730 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 02:26:45,730 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 02:26:45,731 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 02:26:45,736 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 02:26:45,738 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-12 02:26:45,739 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-12 02:26:45,739 INFO L153 SettingsManager]: * Use SBE=true [2023-11-12 02:26:45,741 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 02:26:45,741 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 02:26:45,742 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 02:26:45,742 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 02:26:45,742 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 02:26:45,743 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 02:26:45,743 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 02:26:45,744 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 02:26:45,744 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 02:26:45,745 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 02:26:45,747 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 02:26:45,747 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 02:26:45,748 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 02:26:45,749 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-12 02:26:45,749 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 02:26:45,749 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:26:45,750 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 02:26:45,751 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 02:26:45,752 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 02:26:45,752 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-12 02:26:45,752 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 02:26:45,752 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-12 02:26:45,753 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 02:26:45,753 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-12 02:26:45,753 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 02:26:45,753 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-12 02:26:45,754 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_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e6d92a25ae36f7e711770b5cc6315f0210bbc7c0c024aaddffcd3216b7942769 [2023-11-12 02:26:46,021 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 02:26:46,043 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 02:26:46,046 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 02:26:46,047 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 02:26:46,048 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 02:26:46,049 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-a_file-13.i [2023-11-12 02:26:49,252 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 02:26:49,534 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 02:26:49,534 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-a_file-13.i [2023-11-12 02:26:49,547 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/data/02749e0ab/eb3a7ec2b7744a6faed424b4d39b3d8f/FLAG683e3b1ad [2023-11-12 02:26:49,564 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/data/02749e0ab/eb3a7ec2b7744a6faed424b4d39b3d8f [2023-11-12 02:26:49,567 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 02:26:49,569 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 02:26:49,570 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 02:26:49,571 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 02:26:49,581 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 02:26:49,582 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:26:49" (1/1) ... [2023-11-12 02:26:49,583 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e149fe8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:49, skipping insertion in model container [2023-11-12 02:26:49,584 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 02:26:49" (1/1) ... [2023-11-12 02:26:49,629 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 02:26:49,836 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_2c628336-3959-44b0-9d94-42a08490379d/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-a_file-13.i[916,929] [2023-11-12 02:26:49,958 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:26:49,978 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 02:26:49,998 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_2c628336-3959-44b0-9d94-42a08490379d/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-a_file-13.i[916,929] [2023-11-12 02:26:50,064 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 02:26:50,084 INFO L206 MainTranslator]: Completed translation [2023-11-12 02:26:50,084 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:50 WrapperNode [2023-11-12 02:26:50,090 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 02:26:50,092 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 02:26:50,092 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 02:26:50,092 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 02:26:50,100 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:50" (1/1) ... [2023-11-12 02:26:50,117 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:50" (1/1) ... [2023-11-12 02:26:50,186 INFO L138 Inliner]: procedures = 29, calls = 146, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 429 [2023-11-12 02:26:50,188 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 02:26:50,190 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 02:26:50,191 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 02:26:50,191 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 02:26:50,200 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:50" (1/1) ... [2023-11-12 02:26:50,200 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:50" (1/1) ... [2023-11-12 02:26:50,208 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:50" (1/1) ... [2023-11-12 02:26:50,208 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:50" (1/1) ... [2023-11-12 02:26:50,231 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:50" (1/1) ... [2023-11-12 02:26:50,236 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:50" (1/1) ... [2023-11-12 02:26:50,240 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:50" (1/1) ... [2023-11-12 02:26:50,243 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:50" (1/1) ... [2023-11-12 02:26:50,249 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 02:26:50,251 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 02:26:50,251 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 02:26:50,251 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 02:26:50,252 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:50" (1/1) ... [2023-11-12 02:26:50,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 02:26:50,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:50,296 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 02:26:50,367 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 02:26:50,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-12 02:26:50,368 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-12 02:26:50,368 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2023-11-12 02:26:50,369 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-12 02:26:50,369 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2023-11-12 02:26:50,369 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 02:26:50,369 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 02:26:50,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 02:26:50,371 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 02:26:50,371 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 02:26:50,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 02:26:50,513 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 02:26:50,516 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 02:26:51,117 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 02:26:51,126 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 02:26:51,126 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 02:26:51,129 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:26:51 BoogieIcfgContainer [2023-11-12 02:26:51,129 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 02:26:51,131 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 02:26:51,131 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 02:26:51,135 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 02:26:51,135 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 02:26:49" (1/3) ... [2023-11-12 02:26:51,136 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5255e8e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:26:51, skipping insertion in model container [2023-11-12 02:26:51,136 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 02:26:50" (2/3) ... [2023-11-12 02:26:51,137 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5255e8e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 02:26:51, skipping insertion in model container [2023-11-12 02:26:51,137 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 02:26:51" (3/3) ... [2023-11-12 02:26:51,138 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_variablewrapping_wrapper-a_file-13.i [2023-11-12 02:26:51,159 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 02:26:51,159 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 02:26:51,211 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 02:26:51,218 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;@453a40ac, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-12 02:26:51,219 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 02:26:51,224 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 94 states have (on average 1.446808510638298) internal successors, (136), 95 states have internal predecessors, (136), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-12 02:26:51,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-12 02:26:51,246 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:26:51,247 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:51,248 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:26:51,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:51,255 INFO L85 PathProgramCache]: Analyzing trace with hash 814697608, now seen corresponding path program 1 times [2023-11-12 02:26:51,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:51,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507367462] [2023-11-12 02:26:51,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:51,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:51,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:52,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-12 02:26:52,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:52,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-12 02:26:52,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:52,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:26:52,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:52,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-12 02:26:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:52,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-12 02:26:52,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:52,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-12 02:26:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:52,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-12 02:26:52,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:52,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-12 02:26:52,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:52,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-12 02:26:52,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:52,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-11-12 02:26:52,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:52,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-12 02:26:52,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:52,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-11-12 02:26:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:52,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-12 02:26:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:52,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-11-12 02:26:52,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:52,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-11-12 02:26:52,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:52,311 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:26:52,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:52,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507367462] [2023-11-12 02:26:52,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507367462] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:52,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:52,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 02:26:52,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270219029] [2023-11-12 02:26:52,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:52,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 02:26:52,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:52,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 02:26:52,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 02:26:52,379 INFO L87 Difference]: Start difference. First operand has 112 states, 94 states have (on average 1.446808510638298) internal successors, (136), 95 states have internal predecessors, (136), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:26:52,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:26:52,484 INFO L93 Difference]: Finished difference Result 239 states and 375 transitions. [2023-11-12 02:26:52,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:26:52,487 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 131 [2023-11-12 02:26:52,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:26:52,499 INFO L225 Difference]: With dead ends: 239 [2023-11-12 02:26:52,499 INFO L226 Difference]: Without dead ends: 130 [2023-11-12 02:26:52,503 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:26:52,507 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 41 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:26:52,508 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 507 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:26:52,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-12 02:26:52,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 110. [2023-11-12 02:26:52,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 93 states have (on average 1.4086021505376345) internal successors, (131), 93 states have internal predecessors, (131), 15 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2023-11-12 02:26:52,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 161 transitions. [2023-11-12 02:26:52,563 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 161 transitions. Word has length 131 [2023-11-12 02:26:52,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:26:52,566 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 161 transitions. [2023-11-12 02:26:52,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:26:52,566 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 161 transitions. [2023-11-12 02:26:52,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-12 02:26:52,571 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:26:52,571 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:52,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 02:26:52,572 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:26:52,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:52,573 INFO L85 PathProgramCache]: Analyzing trace with hash 828827457, now seen corresponding path program 1 times [2023-11-12 02:26:52,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:52,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1120974627] [2023-11-12 02:26:52,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:52,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:52,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:54,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-12 02:26:54,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:54,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-12 02:26:54,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:54,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:26:54,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:54,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-12 02:26:54,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:54,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-12 02:26:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:54,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-12 02:26:54,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:54,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-12 02:26:54,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:54,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-12 02:26:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:54,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-12 02:26:54,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:54,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-11-12 02:26:54,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:54,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-12 02:26:54,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:54,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-11-12 02:26:54,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:54,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-12 02:26:54,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:54,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-11-12 02:26:54,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:54,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-11-12 02:26:54,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:26:54,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:54,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1120974627] [2023-11-12 02:26:54,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1120974627] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:54,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:54,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:26:54,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467242512] [2023-11-12 02:26:54,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:54,284 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:26:54,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:54,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:26:54,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:26:54,287 INFO L87 Difference]: Start difference. First operand 110 states and 161 transitions. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-12 02:26:54,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:26:54,811 INFO L93 Difference]: Finished difference Result 324 states and 477 transitions. [2023-11-12 02:26:54,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 02:26:54,811 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) Word has length 133 [2023-11-12 02:26:54,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:26:54,815 INFO L225 Difference]: With dead ends: 324 [2023-11-12 02:26:54,815 INFO L226 Difference]: Without dead ends: 217 [2023-11-12 02:26:54,817 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:26:54,818 INFO L413 NwaCegarLoop]: 91 mSDtfsCounter, 114 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:26:54,819 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 342 Invalid, 295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:26:54,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-11-12 02:26:54,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 213. [2023-11-12 02:26:54,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 180 states have (on average 1.4111111111111112) internal successors, (254), 180 states have internal predecessors, (254), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:26:54,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 314 transitions. [2023-11-12 02:26:54,854 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 314 transitions. Word has length 133 [2023-11-12 02:26:54,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:26:54,855 INFO L495 AbstractCegarLoop]: Abstraction has 213 states and 314 transitions. [2023-11-12 02:26:54,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 2 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 2 states have call predecessors, (15), 2 states have call successors, (15) [2023-11-12 02:26:54,856 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 314 transitions. [2023-11-12 02:26:54,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-12 02:26:54,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:26:54,859 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:54,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 02:26:54,860 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:26:54,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:54,860 INFO L85 PathProgramCache]: Analyzing trace with hash 11179007, now seen corresponding path program 1 times [2023-11-12 02:26:54,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:54,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125378242] [2023-11-12 02:26:54,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:54,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:54,902 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:26:54,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [429210933] [2023-11-12 02:26:54,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:54,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:54,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:54,907 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:54,936 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 02:26:55,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:55,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 446 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:26:55,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:55,751 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:26:55,759 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-12 02:26:55,794 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 23 [2023-11-12 02:26:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:26:55,809 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:26:55,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:55,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125378242] [2023-11-12 02:26:55,814 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:26:55,815 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429210933] [2023-11-12 02:26:55,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429210933] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:55,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:55,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:26:55,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061518988] [2023-11-12 02:26:55,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:55,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:26:55,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:55,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:26:55,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:26:55,819 INFO L87 Difference]: Start difference. First operand 213 states and 314 transitions. Second operand has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 6 states have internal predecessors, (61), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:26:56,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:26:56,184 INFO L93 Difference]: Finished difference Result 502 states and 740 transitions. [2023-11-12 02:26:56,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:26:56,186 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 6 states have internal predecessors, (61), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 133 [2023-11-12 02:26:56,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:26:56,191 INFO L225 Difference]: With dead ends: 502 [2023-11-12 02:26:56,192 INFO L226 Difference]: Without dead ends: 292 [2023-11-12 02:26:56,196 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:26:56,199 INFO L413 NwaCegarLoop]: 119 mSDtfsCounter, 205 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 257 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 257 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:26:56,200 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 387 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 257 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:26:56,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2023-11-12 02:26:56,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 218. [2023-11-12 02:26:56,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 185 states have (on average 1.4054054054054055) internal successors, (260), 185 states have internal predecessors, (260), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:26:56,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 320 transitions. [2023-11-12 02:26:56,262 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 320 transitions. Word has length 133 [2023-11-12 02:26:56,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:26:56,264 INFO L495 AbstractCegarLoop]: Abstraction has 218 states and 320 transitions. [2023-11-12 02:26:56,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.714285714285714) internal successors, (61), 6 states have internal predecessors, (61), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:26:56,264 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 320 transitions. [2023-11-12 02:26:56,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-12 02:26:56,270 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:26:56,270 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:56,281 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-12 02:26:56,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:56,482 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:26:56,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:56,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1577168895, now seen corresponding path program 1 times [2023-11-12 02:26:56,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:56,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736527623] [2023-11-12 02:26:56,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:56,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:56,526 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:26:56,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1159345713] [2023-11-12 02:26:56,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:56,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:56,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:56,529 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:56,556 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 02:26:56,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:56,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:26:56,767 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:56,828 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-12 02:26:56,839 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:26:56,839 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:26:56,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:56,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736527623] [2023-11-12 02:26:56,839 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:26:56,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159345713] [2023-11-12 02:26:56,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159345713] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:56,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:56,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:26:56,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144004510] [2023-11-12 02:26:56,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:56,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:26:56,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:56,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:26:56,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:26:56,844 INFO L87 Difference]: Start difference. First operand 218 states and 320 transitions. Second operand has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:26:57,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:26:57,100 INFO L93 Difference]: Finished difference Result 537 states and 791 transitions. [2023-11-12 02:26:57,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-12 02:26:57,101 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 133 [2023-11-12 02:26:57,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:26:57,104 INFO L225 Difference]: With dead ends: 537 [2023-11-12 02:26:57,104 INFO L226 Difference]: Without dead ends: 322 [2023-11-12 02:26:57,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:26:57,106 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 113 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:26:57,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 506 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:26:57,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2023-11-12 02:26:57,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 224. [2023-11-12 02:26:57,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 191 states have (on average 1.4031413612565444) internal successors, (268), 191 states have internal predecessors, (268), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:26:57,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 328 transitions. [2023-11-12 02:26:57,150 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 328 transitions. Word has length 133 [2023-11-12 02:26:57,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:26:57,150 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 328 transitions. [2023-11-12 02:26:57,150 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.2) internal successors, (61), 5 states have internal predecessors, (61), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:26:57,151 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 328 transitions. [2023-11-12 02:26:57,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-12 02:26:57,153 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:26:57,153 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:57,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-12 02:26:57,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:57,360 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:26:57,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:57,371 INFO L85 PathProgramCache]: Analyzing trace with hash 1915262817, now seen corresponding path program 1 times [2023-11-12 02:26:57,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:57,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579208999] [2023-11-12 02:26:57,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:57,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:57,409 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:26:57,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [291658381] [2023-11-12 02:26:57,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:57,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:57,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:57,411 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:57,444 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 02:26:57,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:57,632 INFO L262 TraceCheckSpWp]: Trace formula consists of 453 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:26:57,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:58,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:26:58,159 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 16 [2023-11-12 02:26:58,228 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:26:58,228 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:26:58,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:58,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579208999] [2023-11-12 02:26:58,229 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:26:58,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291658381] [2023-11-12 02:26:58,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291658381] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:58,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:58,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:26:58,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303634323] [2023-11-12 02:26:58,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:58,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:26:58,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:58,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:26:58,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:26:58,232 INFO L87 Difference]: Start difference. First operand 224 states and 328 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:26:58,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:26:58,710 INFO L93 Difference]: Finished difference Result 550 states and 808 transitions. [2023-11-12 02:26:58,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:26:58,711 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 134 [2023-11-12 02:26:58,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:26:58,714 INFO L225 Difference]: With dead ends: 550 [2023-11-12 02:26:58,714 INFO L226 Difference]: Without dead ends: 329 [2023-11-12 02:26:58,715 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:26:58,716 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 307 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:26:58,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [307 Valid, 433 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:26:58,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2023-11-12 02:26:58,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 249. [2023-11-12 02:26:58,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 216 states have (on average 1.4074074074074074) internal successors, (304), 216 states have internal predecessors, (304), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:26:58,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 364 transitions. [2023-11-12 02:26:58,747 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 364 transitions. Word has length 134 [2023-11-12 02:26:58,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:26:58,748 INFO L495 AbstractCegarLoop]: Abstraction has 249 states and 364 transitions. [2023-11-12 02:26:58,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:26:58,748 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 364 transitions. [2023-11-12 02:26:58,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-12 02:26:58,750 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:26:58,751 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:26:58,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-12 02:26:58,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:58,958 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:26:58,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:26:58,958 INFO L85 PathProgramCache]: Analyzing trace with hash -1678639901, now seen corresponding path program 1 times [2023-11-12 02:26:58,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:26:58,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564005562] [2023-11-12 02:26:58,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:58,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:26:58,999 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:26:58,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1144276309] [2023-11-12 02:26:58,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:26:58,999 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:26:59,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:26:59,001 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:26:59,005 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-12 02:26:59,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:26:59,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-12 02:26:59,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:26:59,393 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2023-11-12 02:26:59,501 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:26:59,501 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:26:59,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:26:59,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564005562] [2023-11-12 02:26:59,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:26:59,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144276309] [2023-11-12 02:26:59,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1144276309] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:26:59,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:26:59,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-12 02:26:59,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983337605] [2023-11-12 02:26:59,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:26:59,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-12 02:26:59,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:26:59,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-12 02:26:59,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:26:59,505 INFO L87 Difference]: Start difference. First operand 249 states and 364 transitions. Second operand has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 8 states have internal predecessors, (62), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:00,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:00,061 INFO L93 Difference]: Finished difference Result 665 states and 972 transitions. [2023-11-12 02:27:00,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:27:00,062 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 8 states have internal predecessors, (62), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 134 [2023-11-12 02:27:00,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:00,065 INFO L225 Difference]: With dead ends: 665 [2023-11-12 02:27:00,065 INFO L226 Difference]: Without dead ends: 419 [2023-11-12 02:27:00,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2023-11-12 02:27:00,068 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 361 mSDsluCounter, 558 mSDsCounter, 0 mSdLazyCounter, 382 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 388 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:00,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 693 Invalid, 388 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 382 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:27:00,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2023-11-12 02:27:00,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 294. [2023-11-12 02:27:00,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 261 states have (on average 1.3984674329501916) internal successors, (365), 261 states have internal predecessors, (365), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:27:00,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 425 transitions. [2023-11-12 02:27:00,099 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 425 transitions. Word has length 134 [2023-11-12 02:27:00,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:00,099 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 425 transitions. [2023-11-12 02:27:00,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.888888888888889) internal successors, (62), 8 states have internal predecessors, (62), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:00,100 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 425 transitions. [2023-11-12 02:27:00,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-12 02:27:00,102 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:00,102 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:00,113 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:00,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:00,309 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:00,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:00,310 INFO L85 PathProgramCache]: Analyzing trace with hash -2071666911, now seen corresponding path program 1 times [2023-11-12 02:27:00,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:00,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183738507] [2023-11-12 02:27:00,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:00,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:00,346 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:00,346 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250255413] [2023-11-12 02:27:00,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:00,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:00,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:00,348 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:00,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-12 02:27:00,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:00,569 INFO L262 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 02:27:00,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:01,216 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:27:01,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:01,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:01,367 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-12 02:27:01,367 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2023-11-12 02:27:01,535 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:27:01,535 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:01,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:01,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183738507] [2023-11-12 02:27:01,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:01,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250255413] [2023-11-12 02:27:01,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250255413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:01,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:01,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:27:01,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449142453] [2023-11-12 02:27:01,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:01,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:27:01,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:01,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:27:01,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:27:01,540 INFO L87 Difference]: Start difference. First operand 294 states and 425 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:02,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:02,211 INFO L93 Difference]: Finished difference Result 842 states and 1212 transitions. [2023-11-12 02:27:02,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:27:02,212 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 134 [2023-11-12 02:27:02,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:02,216 INFO L225 Difference]: With dead ends: 842 [2023-11-12 02:27:02,216 INFO L226 Difference]: Without dead ends: 551 [2023-11-12 02:27:02,218 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:27:02,218 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 322 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 580 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:02,219 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [322 Valid, 580 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:27:02,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2023-11-12 02:27:02,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 325. [2023-11-12 02:27:02,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 292 states have (on average 1.3869863013698631) internal successors, (405), 292 states have internal predecessors, (405), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:27:02,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 465 transitions. [2023-11-12 02:27:02,245 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 465 transitions. Word has length 134 [2023-11-12 02:27:02,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:02,245 INFO L495 AbstractCegarLoop]: Abstraction has 325 states and 465 transitions. [2023-11-12 02:27:02,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:02,246 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 465 transitions. [2023-11-12 02:27:02,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-12 02:27:02,248 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:02,248 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:02,260 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:02,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:02,450 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:02,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:02,451 INFO L85 PathProgramCache]: Analyzing trace with hash -1967914538, now seen corresponding path program 1 times [2023-11-12 02:27:02,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:02,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668858820] [2023-11-12 02:27:02,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:02,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:02,485 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:02,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1464872302] [2023-11-12 02:27:02,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:02,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:02,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:02,486 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:02,504 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-12 02:27:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:02,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:27:02,740 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:02,755 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:27:02,755 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:02,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:02,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668858820] [2023-11-12 02:27:02,756 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:02,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464872302] [2023-11-12 02:27:02,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464872302] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:02,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:02,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:27:02,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070667253] [2023-11-12 02:27:02,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:02,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:27:02,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:02,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:27:02,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:27:02,759 INFO L87 Difference]: Start difference. First operand 325 states and 465 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:02,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:02,782 INFO L93 Difference]: Finished difference Result 641 states and 918 transitions. [2023-11-12 02:27:02,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:27:02,783 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 134 [2023-11-12 02:27:02,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:02,786 INFO L225 Difference]: With dead ends: 641 [2023-11-12 02:27:02,786 INFO L226 Difference]: Without dead ends: 319 [2023-11-12 02:27:02,787 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:27:02,788 INFO L413 NwaCegarLoop]: 154 mSDtfsCounter, 0 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:02,788 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 303 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:27:02,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2023-11-12 02:27:02,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2023-11-12 02:27:02,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 286 states have (on average 1.3496503496503496) internal successors, (386), 286 states have internal predecessors, (386), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:27:02,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 446 transitions. [2023-11-12 02:27:02,811 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 446 transitions. Word has length 134 [2023-11-12 02:27:02,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:02,812 INFO L495 AbstractCegarLoop]: Abstraction has 319 states and 446 transitions. [2023-11-12 02:27:02,812 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:02,812 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 446 transitions. [2023-11-12 02:27:02,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-12 02:27:02,814 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:02,814 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:02,825 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:03,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:03,021 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:03,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:03,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1798678945, now seen corresponding path program 1 times [2023-11-12 02:27:03,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:03,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775530008] [2023-11-12 02:27:03,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:03,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:03,050 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:03,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [312034919] [2023-11-12 02:27:03,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:03,051 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:03,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:03,052 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:03,056 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-12 02:27:03,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:03,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 458 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-12 02:27:03,287 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:03,853 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:27:03,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:03,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:03,988 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-12 02:27:03,989 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 27 [2023-11-12 02:27:04,136 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:27:04,136 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:04,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:04,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775530008] [2023-11-12 02:27:04,137 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:04,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312034919] [2023-11-12 02:27:04,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312034919] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:04,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:04,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:27:04,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764251819] [2023-11-12 02:27:04,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:04,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:27:04,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:04,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:27:04,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:27:04,140 INFO L87 Difference]: Start difference. First operand 319 states and 446 transitions. Second operand has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:04,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:04,739 INFO L93 Difference]: Finished difference Result 842 states and 1176 transitions. [2023-11-12 02:27:04,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:27:04,740 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 134 [2023-11-12 02:27:04,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:04,744 INFO L225 Difference]: With dead ends: 842 [2023-11-12 02:27:04,744 INFO L226 Difference]: Without dead ends: 526 [2023-11-12 02:27:04,745 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:27:04,745 INFO L413 NwaCegarLoop]: 129 mSDtfsCounter, 311 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 404 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 546 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 404 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:04,746 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [311 Valid, 546 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 404 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:27:04,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2023-11-12 02:27:04,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 339. [2023-11-12 02:27:04,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 306 states have (on average 1.3333333333333333) internal successors, (408), 306 states have internal predecessors, (408), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:27:04,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 468 transitions. [2023-11-12 02:27:04,769 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 468 transitions. Word has length 134 [2023-11-12 02:27:04,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:04,769 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 468 transitions. [2023-11-12 02:27:04,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.857142857142858) internal successors, (62), 6 states have internal predecessors, (62), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:04,770 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 468 transitions. [2023-11-12 02:27:04,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-12 02:27:04,771 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:04,772 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:04,783 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:04,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:04,979 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:04,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:04,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1405651935, now seen corresponding path program 1 times [2023-11-12 02:27:04,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:04,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274866805] [2023-11-12 02:27:04,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:04,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:05,010 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:05,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1815665181] [2023-11-12 02:27:05,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:05,011 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:05,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:05,012 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:05,036 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-12 02:27:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:05,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 456 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:27:05,256 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:05,266 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-12 02:27:05,305 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:27:05,305 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:05,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:05,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274866805] [2023-11-12 02:27:05,305 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:05,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815665181] [2023-11-12 02:27:05,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815665181] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:05,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:05,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:27:05,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818375929] [2023-11-12 02:27:05,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:05,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:27:05,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:05,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:27:05,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:27:05,308 INFO L87 Difference]: Start difference. First operand 339 states and 468 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:05,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:05,552 INFO L93 Difference]: Finished difference Result 777 states and 1079 transitions. [2023-11-12 02:27:05,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:27:05,553 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 134 [2023-11-12 02:27:05,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:05,556 INFO L225 Difference]: With dead ends: 777 [2023-11-12 02:27:05,556 INFO L226 Difference]: Without dead ends: 441 [2023-11-12 02:27:05,557 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:27:05,558 INFO L413 NwaCegarLoop]: 191 mSDtfsCounter, 128 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:05,558 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 799 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:27:05,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2023-11-12 02:27:05,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 353. [2023-11-12 02:27:05,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 320 states have (on average 1.334375) internal successors, (427), 320 states have internal predecessors, (427), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:27:05,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 487 transitions. [2023-11-12 02:27:05,581 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 487 transitions. Word has length 134 [2023-11-12 02:27:05,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:05,581 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 487 transitions. [2023-11-12 02:27:05,581 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:05,582 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 487 transitions. [2023-11-12 02:27:05,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-12 02:27:05,583 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:05,584 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:05,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:05,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 02:27:05,790 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:05,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:05,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1931118301, now seen corresponding path program 1 times [2023-11-12 02:27:05,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:05,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412426488] [2023-11-12 02:27:05,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:05,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:05,819 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:05,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1119856464] [2023-11-12 02:27:05,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:05,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:05,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:05,821 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:05,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-12 02:27:06,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:06,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 02:27:06,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:06,587 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-12 02:27:06,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:06,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:06,810 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-12 02:27:06,810 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 28 [2023-11-12 02:27:06,929 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:27:06,929 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:06,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:06,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412426488] [2023-11-12 02:27:06,929 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:06,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119856464] [2023-11-12 02:27:06,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119856464] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:06,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:06,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:27:06,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488932153] [2023-11-12 02:27:06,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:06,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:27:06,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:06,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:27:06,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:27:06,932 INFO L87 Difference]: Start difference. First operand 353 states and 487 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:07,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:07,432 INFO L93 Difference]: Finished difference Result 813 states and 1128 transitions. [2023-11-12 02:27:07,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:27:07,433 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 134 [2023-11-12 02:27:07,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:07,436 INFO L225 Difference]: With dead ends: 813 [2023-11-12 02:27:07,436 INFO L226 Difference]: Without dead ends: 463 [2023-11-12 02:27:07,437 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:27:07,438 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 230 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:07,438 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 461 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:27:07,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2023-11-12 02:27:07,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 334. [2023-11-12 02:27:07,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 301 states have (on average 1.345514950166113) internal successors, (405), 301 states have internal predecessors, (405), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:27:07,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 465 transitions. [2023-11-12 02:27:07,461 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 465 transitions. Word has length 134 [2023-11-12 02:27:07,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:07,462 INFO L495 AbstractCegarLoop]: Abstraction has 334 states and 465 transitions. [2023-11-12 02:27:07,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:07,462 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 465 transitions. [2023-11-12 02:27:07,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2023-11-12 02:27:07,464 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:07,464 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:07,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:07,670 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:07,670 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:07,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:07,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1939227555, now seen corresponding path program 1 times [2023-11-12 02:27:07,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:07,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081504228] [2023-11-12 02:27:07,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:07,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:07,699 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:07,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1922406278] [2023-11-12 02:27:07,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:07,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:07,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:07,701 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:07,709 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-12 02:27:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:07,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-12 02:27:07,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:08,504 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-12 02:27:08,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:08,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:08,720 INFO L322 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-12 02:27:08,720 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 26 [2023-11-12 02:27:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:27:08,857 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:08,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:08,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081504228] [2023-11-12 02:27:08,857 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:08,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922406278] [2023-11-12 02:27:08,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922406278] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:08,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:08,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:27:08,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167666877] [2023-11-12 02:27:08,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:08,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:27:08,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:08,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:27:08,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:27:08,860 INFO L87 Difference]: Start difference. First operand 334 states and 465 transitions. Second operand has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:09,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:09,410 INFO L93 Difference]: Finished difference Result 793 states and 1108 transitions. [2023-11-12 02:27:09,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:27:09,421 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 134 [2023-11-12 02:27:09,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:09,424 INFO L225 Difference]: With dead ends: 793 [2023-11-12 02:27:09,424 INFO L226 Difference]: Without dead ends: 462 [2023-11-12 02:27:09,425 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:27:09,425 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 192 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:09,426 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 513 Invalid, 323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:27:09,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2023-11-12 02:27:09,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 324. [2023-11-12 02:27:09,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 291 states have (on average 1.3505154639175259) internal successors, (393), 291 states have internal predecessors, (393), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:27:09,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 453 transitions. [2023-11-12 02:27:09,449 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 453 transitions. Word has length 134 [2023-11-12 02:27:09,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:09,449 INFO L495 AbstractCegarLoop]: Abstraction has 324 states and 453 transitions. [2023-11-12 02:27:09,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.333333333333334) internal successors, (62), 5 states have internal predecessors, (62), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:09,450 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 453 transitions. [2023-11-12 02:27:09,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-12 02:27:09,451 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:09,452 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:09,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:09,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:09,658 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:09,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:09,659 INFO L85 PathProgramCache]: Analyzing trace with hash 661535356, now seen corresponding path program 1 times [2023-11-12 02:27:09,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:09,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951826217] [2023-11-12 02:27:09,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:09,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:09,685 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:09,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [380030224] [2023-11-12 02:27:09,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:09,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:09,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:09,687 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:09,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-12 02:27:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:09,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 466 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-12 02:27:09,961 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:10,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:10,642 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-12 02:27:10,698 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:10,699 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-12 02:27:10,716 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2023-11-12 02:27:10,730 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:27:10,730 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:10,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:10,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951826217] [2023-11-12 02:27:10,731 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:10,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380030224] [2023-11-12 02:27:10,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380030224] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:10,731 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:10,731 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:27:10,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393786398] [2023-11-12 02:27:10,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:10,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 02:27:10,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:10,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 02:27:10,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:27:10,733 INFO L87 Difference]: Start difference. First operand 324 states and 453 transitions. Second operand has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:11,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:11,114 INFO L93 Difference]: Finished difference Result 752 states and 1044 transitions. [2023-11-12 02:27:11,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:27:11,115 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 135 [2023-11-12 02:27:11,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:11,120 INFO L225 Difference]: With dead ends: 752 [2023-11-12 02:27:11,120 INFO L226 Difference]: Without dead ends: 431 [2023-11-12 02:27:11,122 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:27:11,123 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 249 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:11,123 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [249 Valid, 435 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:27:11,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2023-11-12 02:27:11,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 336. [2023-11-12 02:27:11,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 303 states have (on average 1.3465346534653466) internal successors, (408), 303 states have internal predecessors, (408), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:27:11,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 468 transitions. [2023-11-12 02:27:11,146 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 468 transitions. Word has length 135 [2023-11-12 02:27:11,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:11,147 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 468 transitions. [2023-11-12 02:27:11,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 7.875) internal successors, (63), 7 states have internal predecessors, (63), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:11,147 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 468 transitions. [2023-11-12 02:27:11,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-12 02:27:11,149 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:11,149 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:11,160 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:11,356 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-12 02:27:11,356 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:11,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:11,357 INFO L85 PathProgramCache]: Analyzing trace with hash 832653862, now seen corresponding path program 1 times [2023-11-12 02:27:11,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:11,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86450948] [2023-11-12 02:27:11,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:11,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:11,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:11,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2023-11-12 02:27:11,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:11,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2023-11-12 02:27:11,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:11,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2023-11-12 02:27:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:11,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2023-11-12 02:27:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:11,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2023-11-12 02:27:11,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:11,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2023-11-12 02:27:11,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:11,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2023-11-12 02:27:11,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:11,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2023-11-12 02:27:11,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:11,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2023-11-12 02:27:11,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:11,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2023-11-12 02:27:11,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:11,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2023-11-12 02:27:11,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:11,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2023-11-12 02:27:11,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:11,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2023-11-12 02:27:11,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:11,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2023-11-12 02:27:11,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:11,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2023-11-12 02:27:11,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:11,956 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:27:11,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:11,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86450948] [2023-11-12 02:27:11,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86450948] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:11,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:11,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-12 02:27:11,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519735632] [2023-11-12 02:27:11,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:11,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:27:11,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:11,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:27:11,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:27:11,960 INFO L87 Difference]: Start difference. First operand 336 states and 468 transitions. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:12,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:12,207 INFO L93 Difference]: Finished difference Result 569 states and 798 transitions. [2023-11-12 02:27:12,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:27:12,208 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 135 [2023-11-12 02:27:12,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:12,210 INFO L225 Difference]: With dead ends: 569 [2023-11-12 02:27:12,211 INFO L226 Difference]: Without dead ends: 352 [2023-11-12 02:27:12,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:27:12,212 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 8 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 754 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:12,213 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 754 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:27:12,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2023-11-12 02:27:12,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 344. [2023-11-12 02:27:12,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 311 states have (on average 1.347266881028939) internal successors, (419), 311 states have internal predecessors, (419), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:27:12,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 479 transitions. [2023-11-12 02:27:12,238 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 479 transitions. Word has length 135 [2023-11-12 02:27:12,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:12,239 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 479 transitions. [2023-11-12 02:27:12,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:12,240 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 479 transitions. [2023-11-12 02:27:12,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-12 02:27:12,241 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:12,242 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:12,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-12 02:27:12,242 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:12,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:12,243 INFO L85 PathProgramCache]: Analyzing trace with hash 15005412, now seen corresponding path program 1 times [2023-11-12 02:27:12,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:12,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216442234] [2023-11-12 02:27:12,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:12,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:12,273 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:12,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [235828164] [2023-11-12 02:27:12,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:12,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:12,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:12,275 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:12,300 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-12 02:27:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:12,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:27:12,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:12,579 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-12 02:27:12,585 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:27:12,585 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:12,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:12,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216442234] [2023-11-12 02:27:12,586 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:12,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235828164] [2023-11-12 02:27:12,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235828164] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:12,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:12,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:27:12,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882589269] [2023-11-12 02:27:12,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:12,587 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:27:12,587 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:12,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:27:12,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:27:12,589 INFO L87 Difference]: Start difference. First operand 344 states and 479 transitions. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:12,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:12,611 INFO L93 Difference]: Finished difference Result 567 states and 792 transitions. [2023-11-12 02:27:12,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:27:12,611 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 135 [2023-11-12 02:27:12,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:12,614 INFO L225 Difference]: With dead ends: 567 [2023-11-12 02:27:12,614 INFO L226 Difference]: Without dead ends: 344 [2023-11-12 02:27:12,615 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:27:12,616 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 1 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 4 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:12,616 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 302 Invalid, 4 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:27:12,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2023-11-12 02:27:12,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2023-11-12 02:27:12,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 311 states have (on average 1.3408360128617363) internal successors, (417), 311 states have internal predecessors, (417), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:27:12,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 477 transitions. [2023-11-12 02:27:12,640 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 477 transitions. Word has length 135 [2023-11-12 02:27:12,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:12,641 INFO L495 AbstractCegarLoop]: Abstraction has 344 states and 477 transitions. [2023-11-12 02:27:12,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:12,641 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 477 transitions. [2023-11-12 02:27:12,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-12 02:27:12,643 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:12,643 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:12,657 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:12,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:12,850 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:12,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:12,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1790432922, now seen corresponding path program 1 times [2023-11-12 02:27:12,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:12,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324301870] [2023-11-12 02:27:12,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:12,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:12,888 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:12,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [719072775] [2023-11-12 02:27:12,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:12,888 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:12,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:12,889 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:12,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-12 02:27:13,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:13,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-12 02:27:13,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:13,832 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:27:13,907 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:13,908 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-12 02:27:14,004 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:14,005 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:14,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:14,007 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2023-11-12 02:27:14,186 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-11-12 02:27:14,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:27:14,303 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1317 (Array Int Int))) (let ((.cse0 (store |c_#memory_int| |c_~#signed_char_Array_0~0.base| v_ArrVal_1317))) (= (mod (select (select .cse0 |c_~#unsigned_short_int_Array_0~0.base|) (+ |c_~#unsigned_short_int_Array_0~0.offset| 4)) 65536) (mod (select (select .cse0 |c_~#unsigned_char_Array_0~0.base|) |c_~#unsigned_char_Array_0~0.offset|) 256)))) is different from false [2023-11-12 02:27:14,325 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_1317 (Array Int Int)) (|~#unsigned_short_int_Array_0~0.offset| Int)) (let ((.cse1 (+ |~#unsigned_short_int_Array_0~0.offset| 4))) (let ((.cse0 (store (store |c_#memory_int| |c_~#unsigned_short_int_Array_0~0.base| (store (select |c_#memory_int| |c_~#unsigned_short_int_Array_0~0.base|) .cse1 |c_ULTIMATE.start_step_#t~ite15#1|)) |c_~#signed_char_Array_0~0.base| v_ArrVal_1317))) (= (mod (select (select .cse0 |c_~#unsigned_char_Array_0~0.base|) |c_~#unsigned_char_Array_0~0.offset|) 256) (mod (select (select .cse0 |c_~#unsigned_short_int_Array_0~0.base|) .cse1) 65536))))) is different from false [2023-11-12 02:27:14,442 INFO L322 Elim1Store]: treesize reduction 29, result has 39.6 percent of original size [2023-11-12 02:27:14,443 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 75 treesize of output 42 [2023-11-12 02:27:14,453 INFO L322 Elim1Store]: treesize reduction 12, result has 7.7 percent of original size [2023-11-12 02:27:14,454 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 108 treesize of output 78 [2023-11-12 02:27:14,467 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:27:14,468 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 52 [2023-11-12 02:27:14,745 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:27:14,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:14,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324301870] [2023-11-12 02:27:14,745 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:14,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719072775] [2023-11-12 02:27:14,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719072775] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:27:14,746 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:27:14,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [12] total 21 [2023-11-12 02:27:14,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115352440] [2023-11-12 02:27:14,746 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:14,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-12 02:27:14,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:14,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-12 02:27:14,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=273, Unknown=12, NotChecked=70, Total=420 [2023-11-12 02:27:14,748 INFO L87 Difference]: Start difference. First operand 344 states and 477 transitions. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:15,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:15,630 INFO L93 Difference]: Finished difference Result 670 states and 926 transitions. [2023-11-12 02:27:15,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-12 02:27:15,631 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 135 [2023-11-12 02:27:15,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:15,634 INFO L225 Difference]: With dead ends: 670 [2023-11-12 02:27:15,634 INFO L226 Difference]: Without dead ends: 447 [2023-11-12 02:27:15,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=161, Invalid=704, Unknown=13, NotChecked=114, Total=992 [2023-11-12 02:27:15,636 INFO L413 NwaCegarLoop]: 160 mSDtfsCounter, 306 mSDsluCounter, 569 mSDsCounter, 0 mSdLazyCounter, 480 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 729 SdHoareTripleChecker+Invalid, 1039 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 480 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 554 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:15,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 729 Invalid, 1039 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 480 Invalid, 0 Unknown, 554 Unchecked, 0.5s Time] [2023-11-12 02:27:15,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2023-11-12 02:27:15,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 336. [2023-11-12 02:27:15,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 303 states have (on average 1.3366336633663367) internal successors, (405), 303 states have internal predecessors, (405), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:27:15,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 465 transitions. [2023-11-12 02:27:15,664 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 465 transitions. Word has length 135 [2023-11-12 02:27:15,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:15,664 INFO L495 AbstractCegarLoop]: Abstraction has 336 states and 465 transitions. [2023-11-12 02:27:15,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:15,665 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 465 transitions. [2023-11-12 02:27:15,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-12 02:27:15,666 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:15,666 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:15,681 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:15,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:15,873 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:15,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:15,874 INFO L85 PathProgramCache]: Analyzing trace with hash -998284856, now seen corresponding path program 1 times [2023-11-12 02:27:15,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:15,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000524073] [2023-11-12 02:27:15,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:15,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:15,913 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:15,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2108791398] [2023-11-12 02:27:15,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:15,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:15,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:15,915 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:15,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-12 02:27:16,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:16,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-12 02:27:16,207 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:16,892 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 15 [2023-11-12 02:27:16,957 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:16,958 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 13 [2023-11-12 02:27:17,059 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:27:17,059 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:17,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:17,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000524073] [2023-11-12 02:27:17,060 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:17,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108791398] [2023-11-12 02:27:17,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2108791398] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:17,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:17,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 02:27:17,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75444688] [2023-11-12 02:27:17,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:17,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:27:17,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:17,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:27:17,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:27:17,063 INFO L87 Difference]: Start difference. First operand 336 states and 465 transitions. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 states have internal predecessors, (64), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:17,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:17,643 INFO L93 Difference]: Finished difference Result 834 states and 1159 transitions. [2023-11-12 02:27:17,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:27:17,644 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 states have internal predecessors, (64), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 136 [2023-11-12 02:27:17,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:17,647 INFO L225 Difference]: With dead ends: 834 [2023-11-12 02:27:17,647 INFO L226 Difference]: Without dead ends: 501 [2023-11-12 02:27:17,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:27:17,649 INFO L413 NwaCegarLoop]: 123 mSDtfsCounter, 419 mSDsluCounter, 546 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 419 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:17,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [419 Valid, 669 Invalid, 391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:27:17,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2023-11-12 02:27:17,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 353. [2023-11-12 02:27:17,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 320 states have (on average 1.3375) internal successors, (428), 320 states have internal predecessors, (428), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:27:17,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 488 transitions. [2023-11-12 02:27:17,674 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 488 transitions. Word has length 136 [2023-11-12 02:27:17,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:17,675 INFO L495 AbstractCegarLoop]: Abstraction has 353 states and 488 transitions. [2023-11-12 02:27:17,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 states have internal predecessors, (64), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:17,675 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 488 transitions. [2023-11-12 02:27:17,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-12 02:27:17,676 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:17,677 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:17,684 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:17,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-12 02:27:17,884 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:17,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:17,884 INFO L85 PathProgramCache]: Analyzing trace with hash -1391311866, now seen corresponding path program 1 times [2023-11-12 02:27:17,885 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:17,885 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134793639] [2023-11-12 02:27:17,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:17,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:17,919 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:17,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [50006051] [2023-11-12 02:27:17,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:17,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:17,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:17,921 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:17,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-12 02:27:18,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:18,222 INFO L262 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-12 02:27:18,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:18,842 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:27:18,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:18,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:18,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:18,954 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2023-11-12 02:27:19,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:19,056 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2023-11-12 02:27:19,133 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:27:19,133 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:19,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:19,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134793639] [2023-11-12 02:27:19,134 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:19,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50006051] [2023-11-12 02:27:19,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50006051] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:19,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:19,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:27:19,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193999022] [2023-11-12 02:27:19,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:19,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:27:19,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:19,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:27:19,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:27:19,137 INFO L87 Difference]: Start difference. First operand 353 states and 488 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:19,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:19,661 INFO L93 Difference]: Finished difference Result 1043 states and 1435 transitions. [2023-11-12 02:27:19,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:27:19,662 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 136 [2023-11-12 02:27:19,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:19,666 INFO L225 Difference]: With dead ends: 1043 [2023-11-12 02:27:19,666 INFO L226 Difference]: Without dead ends: 693 [2023-11-12 02:27:19,667 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:27:19,668 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 318 mSDsluCounter, 371 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:19,668 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [318 Valid, 510 Invalid, 325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:27:19,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2023-11-12 02:27:19,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 386. [2023-11-12 02:27:19,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 353 states have (on average 1.348441926345609) internal successors, (476), 353 states have internal predecessors, (476), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:27:19,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 536 transitions. [2023-11-12 02:27:19,718 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 536 transitions. Word has length 136 [2023-11-12 02:27:19,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:19,722 INFO L495 AbstractCegarLoop]: Abstraction has 386 states and 536 transitions. [2023-11-12 02:27:19,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:19,722 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 536 transitions. [2023-11-12 02:27:19,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-12 02:27:19,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:19,724 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:19,738 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:19,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-12 02:27:19,931 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:19,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:19,932 INFO L85 PathProgramCache]: Analyzing trace with hash -779430138, now seen corresponding path program 1 times [2023-11-12 02:27:19,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:19,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514971876] [2023-11-12 02:27:19,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:19,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:19,961 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:19,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [586049058] [2023-11-12 02:27:19,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:19,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:19,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:19,963 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:19,988 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-12 02:27:20,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:20,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-12 02:27:20,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:20,894 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:27:20,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:20,996 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:20,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:20,998 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 27 [2023-11-12 02:27:21,080 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:21,081 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 27 [2023-11-12 02:27:21,148 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:27:21,149 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:21,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:21,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514971876] [2023-11-12 02:27:21,149 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:21,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586049058] [2023-11-12 02:27:21,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586049058] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:21,150 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:21,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:27:21,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137930894] [2023-11-12 02:27:21,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:21,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:27:21,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:21,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:27:21,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:27:21,152 INFO L87 Difference]: Start difference. First operand 386 states and 536 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:21,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:21,727 INFO L93 Difference]: Finished difference Result 1055 states and 1454 transitions. [2023-11-12 02:27:21,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-12 02:27:21,727 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 136 [2023-11-12 02:27:21,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:21,732 INFO L225 Difference]: With dead ends: 1055 [2023-11-12 02:27:21,732 INFO L226 Difference]: Without dead ends: 672 [2023-11-12 02:27:21,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2023-11-12 02:27:21,733 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 350 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 529 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:21,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 529 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-12 02:27:21,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2023-11-12 02:27:21,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 424. [2023-11-12 02:27:21,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 391 states have (on average 1.3427109974424551) internal successors, (525), 391 states have internal predecessors, (525), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:27:21,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 585 transitions. [2023-11-12 02:27:21,762 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 585 transitions. Word has length 136 [2023-11-12 02:27:21,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:21,762 INFO L495 AbstractCegarLoop]: Abstraction has 424 states and 585 transitions. [2023-11-12 02:27:21,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:21,763 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 585 transitions. [2023-11-12 02:27:21,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-12 02:27:21,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:21,764 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:21,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:21,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:21,978 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:21,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:21,978 INFO L85 PathProgramCache]: Analyzing trace with hash -1172457148, now seen corresponding path program 1 times [2023-11-12 02:27:21,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:21,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9700452] [2023-11-12 02:27:21,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:21,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:22,007 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:22,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1856240613] [2023-11-12 02:27:22,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:22,008 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:22,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:22,009 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:22,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-12 02:27:22,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:22,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 471 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-12 02:27:22,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:22,654 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-12 02:27:22,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:22,698 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2023-11-12 02:27:22,777 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:27:22,777 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:22,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:22,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9700452] [2023-11-12 02:27:22,778 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:22,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856240613] [2023-11-12 02:27:22,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856240613] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:22,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:22,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-12 02:27:22,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506847997] [2023-11-12 02:27:22,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:22,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-12 02:27:22,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:22,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-12 02:27:22,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:27:22,781 INFO L87 Difference]: Start difference. First operand 424 states and 585 transitions. Second operand has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 states have internal predecessors, (64), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:23,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:23,290 INFO L93 Difference]: Finished difference Result 986 states and 1365 transitions. [2023-11-12 02:27:23,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-12 02:27:23,290 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 states have internal predecessors, (64), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 136 [2023-11-12 02:27:23,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:23,295 INFO L225 Difference]: With dead ends: 986 [2023-11-12 02:27:23,295 INFO L226 Difference]: Without dead ends: 565 [2023-11-12 02:27:23,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=130, Invalid=290, Unknown=0, NotChecked=0, Total=420 [2023-11-12 02:27:23,297 INFO L413 NwaCegarLoop]: 162 mSDtfsCounter, 491 mSDsluCounter, 540 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 491 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:23,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [491 Valid, 702 Invalid, 353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 347 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:27:23,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2023-11-12 02:27:23,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 406. [2023-11-12 02:27:23,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 373 states have (on average 1.35656836461126) internal successors, (506), 373 states have internal predecessors, (506), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:27:23,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 566 transitions. [2023-11-12 02:27:23,338 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 566 transitions. Word has length 136 [2023-11-12 02:27:23,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:23,338 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 566 transitions. [2023-11-12 02:27:23,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 6.4) internal successors, (64), 9 states have internal predecessors, (64), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:23,339 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 566 transitions. [2023-11-12 02:27:23,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-12 02:27:23,342 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:23,342 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:23,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:23,548 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:23,549 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:23,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:23,549 INFO L85 PathProgramCache]: Analyzing trace with hash 531916168, now seen corresponding path program 1 times [2023-11-12 02:27:23,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:23,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062319711] [2023-11-12 02:27:23,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:23,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:23,578 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:23,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [443669119] [2023-11-12 02:27:23,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:23,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:23,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:23,580 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:23,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-12 02:27:23,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:23,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-12 02:27:23,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:24,361 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-12 02:27:24,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:24,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:24,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:24,560 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 28 [2023-11-12 02:27:24,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:24,640 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 28 [2023-11-12 02:27:24,713 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:27:24,713 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:24,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:24,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062319711] [2023-11-12 02:27:24,713 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:24,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [443669119] [2023-11-12 02:27:24,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [443669119] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:24,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:24,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:27:24,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433888239] [2023-11-12 02:27:24,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:24,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:27:24,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:24,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:27:24,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:27:24,716 INFO L87 Difference]: Start difference. First operand 406 states and 566 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:25,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:25,176 INFO L93 Difference]: Finished difference Result 912 states and 1276 transitions. [2023-11-12 02:27:25,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:27:25,177 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 136 [2023-11-12 02:27:25,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:25,181 INFO L225 Difference]: With dead ends: 912 [2023-11-12 02:27:25,181 INFO L226 Difference]: Without dead ends: 509 [2023-11-12 02:27:25,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:27:25,182 INFO L413 NwaCegarLoop]: 137 mSDtfsCounter, 234 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 268 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:25,183 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [234 Valid, 452 Invalid, 268 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:27:25,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2023-11-12 02:27:25,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 369. [2023-11-12 02:27:25,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 336 states have (on average 1.3601190476190477) internal successors, (457), 336 states have internal predecessors, (457), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:27:25,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 517 transitions. [2023-11-12 02:27:25,207 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 517 transitions. Word has length 136 [2023-11-12 02:27:25,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:25,208 INFO L495 AbstractCegarLoop]: Abstraction has 369 states and 517 transitions. [2023-11-12 02:27:25,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:25,208 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 517 transitions. [2023-11-12 02:27:25,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-12 02:27:25,210 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:25,210 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:25,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:25,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:25,417 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:25,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:25,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1143797896, now seen corresponding path program 1 times [2023-11-12 02:27:25,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:25,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186323071] [2023-11-12 02:27:25,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:25,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:25,463 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:25,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1251813160] [2023-11-12 02:27:25,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:25,464 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:25,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:25,465 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:25,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-12 02:27:25,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:25,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-12 02:27:25,805 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:26,264 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-12 02:27:26,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:26,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:26,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:26,447 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 26 [2023-11-12 02:27:26,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:26,528 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 26 [2023-11-12 02:27:26,601 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:27:26,601 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:26,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:26,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186323071] [2023-11-12 02:27:26,602 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:26,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251813160] [2023-11-12 02:27:26,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251813160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:26,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:26,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:27:26,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886558337] [2023-11-12 02:27:26,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:26,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:27:26,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:26,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:27:26,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:27:26,606 INFO L87 Difference]: Start difference. First operand 369 states and 517 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:27,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:27,122 INFO L93 Difference]: Finished difference Result 834 states and 1170 transitions. [2023-11-12 02:27:27,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:27:27,126 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 136 [2023-11-12 02:27:27,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:27,128 INFO L225 Difference]: With dead ends: 834 [2023-11-12 02:27:27,128 INFO L226 Difference]: Without dead ends: 468 [2023-11-12 02:27:27,129 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 131 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:27:27,130 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 200 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 312 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 200 SdHoareTripleChecker+Valid, 486 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:27,131 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [200 Valid, 486 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 312 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-12 02:27:27,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2023-11-12 02:27:27,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 337. [2023-11-12 02:27:27,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 304 states have (on average 1.3585526315789473) internal successors, (413), 304 states have internal predecessors, (413), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:27:27,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 473 transitions. [2023-11-12 02:27:27,156 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 473 transitions. Word has length 136 [2023-11-12 02:27:27,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:27,157 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 473 transitions. [2023-11-12 02:27:27,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 states have internal predecessors, (64), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:27,157 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 473 transitions. [2023-11-12 02:27:27,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-12 02:27:27,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:27,159 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:27,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:27,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:27,366 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:27,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:27,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1407609052, now seen corresponding path program 1 times [2023-11-12 02:27:27,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:27,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251006053] [2023-11-12 02:27:27,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:27,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:27,396 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:27,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1518587940] [2023-11-12 02:27:27,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:27,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:27,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:27,398 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:27,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-12 02:27:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:27,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-12 02:27:27,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:27,779 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 10 [2023-11-12 02:27:27,790 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:27:27,790 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:27,791 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:27,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251006053] [2023-11-12 02:27:27,791 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:27,791 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518587940] [2023-11-12 02:27:27,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518587940] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:27,791 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:27,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:27:27,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778998724] [2023-11-12 02:27:27,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:27,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:27:27,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:27,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:27:27,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:27:27,797 INFO L87 Difference]: Start difference. First operand 337 states and 473 transitions. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:28,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:28,038 INFO L93 Difference]: Finished difference Result 643 states and 899 transitions. [2023-11-12 02:27:28,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:27:28,039 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 136 [2023-11-12 02:27:28,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:28,042 INFO L225 Difference]: With dead ends: 643 [2023-11-12 02:27:28,043 INFO L226 Difference]: Without dead ends: 420 [2023-11-12 02:27:28,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:27:28,044 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 97 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 620 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:28,045 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 620 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:27:28,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420 states. [2023-11-12 02:27:28,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420 to 337. [2023-11-12 02:27:28,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 304 states have (on average 1.3453947368421053) internal successors, (409), 304 states have internal predecessors, (409), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:27:28,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 469 transitions. [2023-11-12 02:27:28,072 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 469 transitions. Word has length 136 [2023-11-12 02:27:28,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:28,073 INFO L495 AbstractCegarLoop]: Abstraction has 337 states and 469 transitions. [2023-11-12 02:27:28,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:28,073 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 469 transitions. [2023-11-12 02:27:28,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-12 02:27:28,074 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:28,075 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:28,084 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:28,282 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-12 02:27:28,282 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:28,282 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:28,283 INFO L85 PathProgramCache]: Analyzing trace with hash -586535654, now seen corresponding path program 1 times [2023-11-12 02:27:28,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:28,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314916236] [2023-11-12 02:27:28,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:28,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:28,313 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:28,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [592369153] [2023-11-12 02:27:28,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:28,314 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:28,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:28,315 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:28,333 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-12 02:27:28,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:28,643 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 02:27:28,647 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:28,991 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 1 [2023-11-12 02:27:29,050 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:29,051 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 15 [2023-11-12 02:27:29,102 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:27:29,102 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:29,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:29,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314916236] [2023-11-12 02:27:29,103 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:29,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592369153] [2023-11-12 02:27:29,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592369153] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:29,103 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:29,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:27:29,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141091780] [2023-11-12 02:27:29,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:29,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-12 02:27:29,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:29,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-12 02:27:29,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-12 02:27:29,105 INFO L87 Difference]: Start difference. First operand 337 states and 469 transitions. Second operand has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:29,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:29,457 INFO L93 Difference]: Finished difference Result 607 states and 848 transitions. [2023-11-12 02:27:29,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:27:29,458 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 136 [2023-11-12 02:27:29,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:29,461 INFO L225 Difference]: With dead ends: 607 [2023-11-12 02:27:29,461 INFO L226 Difference]: Without dead ends: 384 [2023-11-12 02:27:29,462 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-12 02:27:29,463 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 253 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:29,463 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 523 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 02:27:29,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2023-11-12 02:27:29,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 305. [2023-11-12 02:27:29,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 272 states have (on average 1.3308823529411764) internal successors, (362), 272 states have internal predecessors, (362), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:27:29,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 422 transitions. [2023-11-12 02:27:29,486 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 422 transitions. Word has length 136 [2023-11-12 02:27:29,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:29,486 INFO L495 AbstractCegarLoop]: Abstraction has 305 states and 422 transitions. [2023-11-12 02:27:29,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.142857142857142) internal successors, (64), 6 states have internal predecessors, (64), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:29,487 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 422 transitions. [2023-11-12 02:27:29,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-12 02:27:29,488 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:29,488 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:29,497 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:29,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-12 02:27:29,695 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:29,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:29,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1873235617, now seen corresponding path program 1 times [2023-11-12 02:27:29,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:29,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225423813] [2023-11-12 02:27:29,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:29,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:29,725 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:29,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [817726176] [2023-11-12 02:27:29,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:29,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:29,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:29,727 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:29,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-12 02:27:30,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:30,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 39 conjunts are in the unsatisfiable core [2023-11-12 02:27:30,058 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:30,686 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-12 02:27:30,764 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:30,764 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 20 [2023-11-12 02:27:30,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:30,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:30,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:30,824 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 23 [2023-11-12 02:27:30,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-12 02:27:30,903 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 32 treesize of output 23 [2023-11-12 02:27:30,991 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2023-11-12 02:27:30,991 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 02:27:31,144 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2188 Int) (v_ArrVal_2186 (Array Int Int))) (let ((.cse1 (store |c_#memory_int| |c_~#signed_char_Array_0~0.base| v_ArrVal_2186))) (let ((.cse0 (select .cse1 |c_~#unsigned_short_int_Array_0~0.base|))) (= (mod (select .cse0 (+ |c_~#unsigned_short_int_Array_0~0.offset| 4)) 65536) (mod (select (select (store .cse1 |c_~#unsigned_short_int_Array_0~0.base| (store .cse0 |c_~#unsigned_short_int_Array_0~0.offset| v_ArrVal_2188)) |c_~#unsigned_char_Array_0~0.base|) |c_~#unsigned_char_Array_0~0.offset|) 256))))) is different from false [2023-11-12 02:27:31,169 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2188 Int) (v_ArrVal_2186 (Array Int Int)) (|~#unsigned_short_int_Array_0~0.offset| Int)) (let ((.cse1 (+ |~#unsigned_short_int_Array_0~0.offset| 4))) (let ((.cse0 (select (store (store |c_#memory_int| |c_~#unsigned_short_int_Array_0~0.base| (store (select |c_#memory_int| |c_~#unsigned_short_int_Array_0~0.base|) .cse1 |c_ULTIMATE.start_step_#t~ite15#1|)) |c_~#signed_char_Array_0~0.base| v_ArrVal_2186) |c_~#unsigned_short_int_Array_0~0.base|))) (= (mod (select .cse0 .cse1) 65536) (mod (select (select (store (store |c_#memory_int| |c_~#signed_char_Array_0~0.base| v_ArrVal_2186) |c_~#unsigned_short_int_Array_0~0.base| (store .cse0 |~#unsigned_short_int_Array_0~0.offset| v_ArrVal_2188)) |c_~#unsigned_char_Array_0~0.base|) |c_~#unsigned_char_Array_0~0.offset|) 256))))) is different from false [2023-11-12 02:27:31,184 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_2188 Int) (v_ArrVal_2186 (Array Int Int)) (|~#unsigned_short_int_Array_0~0.offset| Int)) (let ((.cse1 (+ |~#unsigned_short_int_Array_0~0.offset| 4))) (let ((.cse0 (select (store (store |c_#memory_int| |c_~#unsigned_short_int_Array_0~0.base| (store (select |c_#memory_int| |c_~#unsigned_short_int_Array_0~0.base|) .cse1 (mod (select (select |c_#memory_int| |c_~#unsigned_char_Array_0~0.base|) |c_~#unsigned_char_Array_0~0.offset|) 256))) |c_~#signed_char_Array_0~0.base| v_ArrVal_2186) |c_~#unsigned_short_int_Array_0~0.base|))) (= (mod (select (select (store (store |c_#memory_int| |c_~#signed_char_Array_0~0.base| v_ArrVal_2186) |c_~#unsigned_short_int_Array_0~0.base| (store .cse0 |~#unsigned_short_int_Array_0~0.offset| v_ArrVal_2188)) |c_~#unsigned_char_Array_0~0.base|) |c_~#unsigned_char_Array_0~0.offset|) 256) (mod (select .cse0 .cse1) 65536))))) is different from false [2023-11-12 02:27:31,229 INFO L322 Elim1Store]: treesize reduction 29, result has 48.2 percent of original size [2023-11-12 02:27:31,230 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 75 [2023-11-12 02:27:31,254 INFO L322 Elim1Store]: treesize reduction 13, result has 38.1 percent of original size [2023-11-12 02:27:31,255 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 94 treesize of output 80 [2023-11-12 02:27:31,265 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 350 treesize of output 330 [2023-11-12 02:27:31,288 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:27:31,289 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 182 treesize of output 160 [2023-11-12 02:27:31,315 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 4 [2023-11-12 02:27:31,337 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:27:31,337 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 98 treesize of output 98 [2023-11-12 02:27:31,914 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:27:31,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:31,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225423813] [2023-11-12 02:27:31,915 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:31,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817726176] [2023-11-12 02:27:31,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817726176] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-12 02:27:31,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 02:27:31,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [12] total 22 [2023-11-12 02:27:31,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408873153] [2023-11-12 02:27:31,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:31,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-12 02:27:31,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:31,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-12 02:27:31,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=288, Unknown=3, NotChecked=108, Total=462 [2023-11-12 02:27:31,918 INFO L87 Difference]: Start difference. First operand 305 states and 422 transitions. Second operand has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:33,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:33,051 INFO L93 Difference]: Finished difference Result 565 states and 770 transitions. [2023-11-12 02:27:33,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-12 02:27:33,054 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 137 [2023-11-12 02:27:33,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:33,057 INFO L225 Difference]: With dead ends: 565 [2023-11-12 02:27:33,057 INFO L226 Difference]: Without dead ends: 374 [2023-11-12 02:27:33,058 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 252 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 3 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=673, Unknown=3, NotChecked=168, Total=992 [2023-11-12 02:27:33,059 INFO L413 NwaCegarLoop]: 156 mSDtfsCounter, 259 mSDsluCounter, 608 mSDsCounter, 0 mSdLazyCounter, 529 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 1242 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 707 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:33,059 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 764 Invalid, 1242 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 529 Invalid, 0 Unknown, 707 Unchecked, 0.7s Time] [2023-11-12 02:27:33,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2023-11-12 02:27:33,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 291. [2023-11-12 02:27:33,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 258 states have (on average 1.321705426356589) internal successors, (341), 258 states have internal predecessors, (341), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:27:33,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 401 transitions. [2023-11-12 02:27:33,083 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 401 transitions. Word has length 137 [2023-11-12 02:27:33,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:33,084 INFO L495 AbstractCegarLoop]: Abstraction has 291 states and 401 transitions. [2023-11-12 02:27:33,084 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 5.416666666666667) internal successors, (65), 12 states have internal predecessors, (65), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:33,084 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 401 transitions. [2023-11-12 02:27:33,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-12 02:27:33,085 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:33,085 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:33,092 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-12 02:27:33,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-12 02:27:33,293 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:33,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:33,293 INFO L85 PathProgramCache]: Analyzing trace with hash -459240300, now seen corresponding path program 1 times [2023-11-12 02:27:33,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:33,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143871307] [2023-11-12 02:27:33,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:33,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:33,318 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:33,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1113514634] [2023-11-12 02:27:33,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:33,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:33,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:33,319 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:33,324 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-12 02:27:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:33,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-12 02:27:33,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:33,651 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:27:33,651 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:33,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:33,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143871307] [2023-11-12 02:27:33,651 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:33,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113514634] [2023-11-12 02:27:33,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113514634] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:33,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:33,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:27:33,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858536994] [2023-11-12 02:27:33,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:33,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:27:33,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:33,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:27:33,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:27:33,653 INFO L87 Difference]: Start difference. First operand 291 states and 401 transitions. Second operand has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:33,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:33,720 INFO L93 Difference]: Finished difference Result 595 states and 821 transitions. [2023-11-12 02:27:33,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-12 02:27:33,720 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 139 [2023-11-12 02:27:33,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:33,723 INFO L225 Difference]: With dead ends: 595 [2023-11-12 02:27:33,723 INFO L226 Difference]: Without dead ends: 307 [2023-11-12 02:27:33,724 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-12 02:27:33,724 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 47 mSDsluCounter, 563 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:33,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 712 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:27:33,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-11-12 02:27:33,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 299. [2023-11-12 02:27:33,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 266 states have (on average 1.3120300751879699) internal successors, (349), 266 states have internal predecessors, (349), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:27:33,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 409 transitions. [2023-11-12 02:27:33,747 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 409 transitions. Word has length 139 [2023-11-12 02:27:33,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:33,747 INFO L495 AbstractCegarLoop]: Abstraction has 299 states and 409 transitions. [2023-11-12 02:27:33,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.166666666666666) internal successors, (67), 6 states have internal predecessors, (67), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:33,748 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 409 transitions. [2023-11-12 02:27:33,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-12 02:27:33,749 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:33,749 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:33,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:33,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-12 02:27:33,956 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:33,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:33,956 INFO L85 PathProgramCache]: Analyzing trace with hash -570344606, now seen corresponding path program 1 times [2023-11-12 02:27:33,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:33,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [84998754] [2023-11-12 02:27:33,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:33,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:33,982 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:33,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1622722735] [2023-11-12 02:27:33,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:33,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:33,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:33,984 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:34,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-12 02:27:34,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:34,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-12 02:27:34,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:34,334 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:27:34,334 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:34,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:34,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [84998754] [2023-11-12 02:27:34,334 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:34,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622722735] [2023-11-12 02:27:34,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622722735] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:34,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:34,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-12 02:27:34,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922816618] [2023-11-12 02:27:34,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:34,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-12 02:27:34,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:34,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-12 02:27:34,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:27:34,337 INFO L87 Difference]: Start difference. First operand 299 states and 409 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:34,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:34,360 INFO L93 Difference]: Finished difference Result 591 states and 809 transitions. [2023-11-12 02:27:34,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-12 02:27:34,361 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 139 [2023-11-12 02:27:34,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:34,363 INFO L225 Difference]: With dead ends: 591 [2023-11-12 02:27:34,363 INFO L226 Difference]: Without dead ends: 295 [2023-11-12 02:27:34,364 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-12 02:27:34,365 INFO L413 NwaCegarLoop]: 147 mSDtfsCounter, 16 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:34,365 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 273 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 02:27:34,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2023-11-12 02:27:34,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2023-11-12 02:27:34,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 262 states have (on average 1.3015267175572518) internal successors, (341), 262 states have internal predecessors, (341), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:27:34,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 401 transitions. [2023-11-12 02:27:34,387 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 401 transitions. Word has length 139 [2023-11-12 02:27:34,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:34,387 INFO L495 AbstractCegarLoop]: Abstraction has 295 states and 401 transitions. [2023-11-12 02:27:34,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:34,388 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 401 transitions. [2023-11-12 02:27:34,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-12 02:27:34,389 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:34,389 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:34,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-12 02:27:34,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-12 02:27:34,596 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:34,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:34,597 INFO L85 PathProgramCache]: Analyzing trace with hash -335466865, now seen corresponding path program 1 times [2023-11-12 02:27:34,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:34,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966226424] [2023-11-12 02:27:34,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:34,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:34,627 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:34,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [19445605] [2023-11-12 02:27:34,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:34,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:34,628 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:34,629 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:34,656 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-12 02:27:34,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:34,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 484 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-12 02:27:34,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:27:35,061 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:35,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:35,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966226424] [2023-11-12 02:27:35,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:35,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19445605] [2023-11-12 02:27:35,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19445605] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:35,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:35,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 02:27:35,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283156364] [2023-11-12 02:27:35,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:35,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 02:27:35,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:35,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 02:27:35,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 02:27:35,064 INFO L87 Difference]: Start difference. First operand 295 states and 401 transitions. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:35,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:35,229 INFO L93 Difference]: Finished difference Result 674 states and 902 transitions. [2023-11-12 02:27:35,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 02:27:35,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 141 [2023-11-12 02:27:35,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:35,232 INFO L225 Difference]: With dead ends: 674 [2023-11-12 02:27:35,233 INFO L226 Difference]: Without dead ends: 382 [2023-11-12 02:27:35,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:27:35,238 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 31 mSDsluCounter, 333 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:35,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 465 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 02:27:35,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2023-11-12 02:27:35,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 332. [2023-11-12 02:27:35,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 299 states have (on average 1.2642140468227425) internal successors, (378), 299 states have internal predecessors, (378), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:27:35,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 438 transitions. [2023-11-12 02:27:35,271 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 438 transitions. Word has length 141 [2023-11-12 02:27:35,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:35,272 INFO L495 AbstractCegarLoop]: Abstraction has 332 states and 438 transitions. [2023-11-12 02:27:35,272 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:35,272 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 438 transitions. [2023-11-12 02:27:35,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-12 02:27:35,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:35,274 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:35,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:35,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-12 02:27:35,481 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:35,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:35,481 INFO L85 PathProgramCache]: Analyzing trace with hash -922272879, now seen corresponding path program 1 times [2023-11-12 02:27:35,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:35,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656369293] [2023-11-12 02:27:35,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:35,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:35,512 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:35,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076689219] [2023-11-12 02:27:35,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:35,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:35,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:35,513 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:35,532 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-12 02:27:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 02:27:35,865 INFO L262 TraceCheckSpWp]: Trace formula consists of 489 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-12 02:27:35,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 02:27:35,961 INFO L322 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-12 02:27:35,962 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 46 treesize of output 44 [2023-11-12 02:27:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2023-11-12 02:27:36,017 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 02:27:36,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-12 02:27:36,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656369293] [2023-11-12 02:27:36,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-12 02:27:36,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076689219] [2023-11-12 02:27:36,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076689219] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 02:27:36,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 02:27:36,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-12 02:27:36,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282857419] [2023-11-12 02:27:36,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 02:27:36,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-12 02:27:36,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-12 02:27:36,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-12 02:27:36,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-12 02:27:36,022 INFO L87 Difference]: Start difference. First operand 332 states and 438 transitions. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:36,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 02:27:36,258 INFO L93 Difference]: Finished difference Result 722 states and 949 transitions. [2023-11-12 02:27:36,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-12 02:27:36,259 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) Word has length 141 [2023-11-12 02:27:36,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 02:27:36,263 INFO L225 Difference]: With dead ends: 722 [2023-11-12 02:27:36,263 INFO L226 Difference]: Without dead ends: 393 [2023-11-12 02:27:36,265 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2023-11-12 02:27:36,266 INFO L413 NwaCegarLoop]: 131 mSDtfsCounter, 49 mSDsluCounter, 434 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 565 SdHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-12 02:27:36,266 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 565 Invalid, 179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-12 02:27:36,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2023-11-12 02:27:36,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 357. [2023-11-12 02:27:36,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 324 states have (on average 1.2561728395061729) internal successors, (407), 324 states have internal predecessors, (407), 30 states have call successors, (30), 2 states have call predecessors, (30), 2 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2023-11-12 02:27:36,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 467 transitions. [2023-11-12 02:27:36,297 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 467 transitions. Word has length 141 [2023-11-12 02:27:36,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 02:27:36,297 INFO L495 AbstractCegarLoop]: Abstraction has 357 states and 467 transitions. [2023-11-12 02:27:36,298 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 1 states have call successors, (15), 1 states have call predecessors, (15), 1 states have return successors, (15), 1 states have call predecessors, (15), 1 states have call successors, (15) [2023-11-12 02:27:36,298 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 467 transitions. [2023-11-12 02:27:36,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2023-11-12 02:27:36,305 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 02:27:36,305 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 02:27:36,311 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-12 02:27:36,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-12 02:27:36,506 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 02:27:36,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 02:27:36,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1377151196, now seen corresponding path program 1 times [2023-11-12 02:27:36,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-12 02:27:36,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95538160] [2023-11-12 02:27:36,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:36,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 02:27:36,534 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-12 02:27:36,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [697570775] [2023-11-12 02:27:36,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 02:27:36,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 02:27:36,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 [2023-11-12 02:27:36,536 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 02:27:36,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2c628336-3959-44b0-9d94-42a08490379d/bin/uautomizer-verify-uTZkv6EMXl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process