./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-p_file-18.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-p_file-18.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu --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 8167bb57c72da66729eaf4d0bfb99f298c96636d95817c5a55fbaebfee04d766 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:33:40,872 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:33:40,989 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:33:40,994 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:33:40,996 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:33:41,044 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:33:41,051 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:33:41,058 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:33:41,059 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:33:41,060 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:33:41,061 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:33:41,061 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:33:41,062 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:33:41,063 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:33:41,063 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:33:41,081 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:33:41,084 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:33:41,088 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:33:41,089 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:33:41,090 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:33:41,091 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:33:41,092 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:33:41,092 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:33:41,093 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:33:41,093 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:33:41,094 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:33:41,095 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:33:41,095 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:33:41,095 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:33:41,096 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:33:41,097 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:33:41,098 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:33:41,098 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:33:41,098 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:33:41,098 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:33:41,099 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:33:41,099 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:33:41,099 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:33:41,099 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:33:41,100 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_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8167bb57c72da66729eaf4d0bfb99f298c96636d95817c5a55fbaebfee04d766 [2023-11-19 07:33:41,447 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:33:41,485 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:33:41,488 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:33:41,490 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:33:41,490 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:33:41,492 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-p_file-18.i [2023-11-19 07:33:44,574 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:33:44,908 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:33:44,908 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-p_file-18.i [2023-11-19 07:33:44,920 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/data/896df7eb1/7d3e3799da5441cf997a81013c04fd40/FLAG06ad04881 [2023-11-19 07:33:44,939 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/data/896df7eb1/7d3e3799da5441cf997a81013c04fd40 [2023-11-19 07:33:44,945 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:33:44,946 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:33:44,948 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:33:44,949 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:33:44,954 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:33:44,956 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:33:44" (1/1) ... [2023-11-19 07:33:44,958 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10fc7a5d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:44, skipping insertion in model container [2023-11-19 07:33:44,958 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:33:44" (1/1) ... [2023-11-19 07:33:45,004 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:33:45,194 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_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-p_file-18.i[916,929] [2023-11-19 07:33:45,253 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:33:45,267 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:33:45,280 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_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/sv-benchmarks/c/hardness-nfm22/hardness_variablewrapping_wrapper-p_file-18.i[916,929] [2023-11-19 07:33:45,314 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:33:45,334 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:33:45,335 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:45 WrapperNode [2023-11-19 07:33:45,335 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:33:45,336 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:33:45,337 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:33:45,337 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:33:45,345 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:45" (1/1) ... [2023-11-19 07:33:45,370 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:45" (1/1) ... [2023-11-19 07:33:45,428 INFO L138 Inliner]: procedures = 29, calls = 148, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 449 [2023-11-19 07:33:45,429 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:33:45,430 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:33:45,430 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:33:45,430 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:33:45,440 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:45" (1/1) ... [2023-11-19 07:33:45,440 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:45" (1/1) ... [2023-11-19 07:33:45,447 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:45" (1/1) ... [2023-11-19 07:33:45,447 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:45" (1/1) ... [2023-11-19 07:33:45,464 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:45" (1/1) ... [2023-11-19 07:33:45,470 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:45" (1/1) ... [2023-11-19 07:33:45,474 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:45" (1/1) ... [2023-11-19 07:33:45,478 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:45" (1/1) ... [2023-11-19 07:33:45,485 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:33:45,486 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:33:45,486 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:33:45,486 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:33:45,487 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:45" (1/1) ... [2023-11-19 07:33:45,494 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:33:45,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:33:45,525 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:33:45,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:33:45,580 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:33:45,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~real [2023-11-19 07:33:45,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:33:45,581 INFO L130 BoogieDeclarations]: Found specification of procedure write~real [2023-11-19 07:33:45,581 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:33:45,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~real [2023-11-19 07:33:45,582 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 07:33:45,582 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 07:33:45,582 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:33:45,582 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:33:45,583 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:33:45,749 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:33:45,753 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:33:46,412 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:33:46,422 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:33:46,422 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 07:33:46,435 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:33:46 BoogieIcfgContainer [2023-11-19 07:33:46,436 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:33:46,439 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:33:46,439 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:33:46,443 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:33:46,444 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:33:44" (1/3) ... [2023-11-19 07:33:46,445 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da6dbed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:33:46, skipping insertion in model container [2023-11-19 07:33:46,446 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:33:45" (2/3) ... [2023-11-19 07:33:46,448 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5da6dbed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:33:46, skipping insertion in model container [2023-11-19 07:33:46,449 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:33:46" (3/3) ... [2023-11-19 07:33:46,451 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_variablewrapping_wrapper-p_file-18.i [2023-11-19 07:33:46,476 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:33:46,476 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:33:46,546 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:33:46,556 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;@522bacf0, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:33:46,557 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 07:33:46,563 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 89 states have (on average 1.4831460674157304) internal successors, (132), 90 states have internal predecessors, (132), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 07:33:46,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-19 07:33:46,581 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:33:46,582 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:33:46,582 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:33:46,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:46,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1578952680, now seen corresponding path program 1 times [2023-11-19 07:33:46,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:46,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9279135] [2023-11-19 07:33:46,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:46,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:46,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:46,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:46,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9279135] [2023-11-19 07:33:46,954 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-19 07:33:46,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771076583] [2023-11-19 07:33:46,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:46,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:33:46,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:33:46,957 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:33:46,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:33:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:47,270 INFO L262 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-19 07:33:47,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:33:47,346 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2023-11-19 07:33:47,348 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:33:47,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771076583] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:33:47,350 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:33:47,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-19 07:33:47,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768431336] [2023-11-19 07:33:47,354 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:33:47,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-19 07:33:47,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:47,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-19 07:33:47,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:33:47,411 INFO L87 Difference]: Start difference. First operand has 104 states, 89 states have (on average 1.4831460674157304) internal successors, (132), 90 states have internal predecessors, (132), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-19 07:33:47,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:33:47,458 INFO L93 Difference]: Finished difference Result 201 states and 318 transitions. [2023-11-19 07:33:47,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-19 07:33:47,460 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) Word has length 107 [2023-11-19 07:33:47,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:33:47,469 INFO L225 Difference]: With dead ends: 201 [2023-11-19 07:33:47,469 INFO L226 Difference]: Without dead ends: 100 [2023-11-19 07:33:47,473 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-19 07:33:47,477 INFO L413 NwaCegarLoop]: 149 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:33:47,478 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:33:47,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-19 07:33:47,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2023-11-19 07:33:47,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 86 states have (on average 1.4534883720930232) internal successors, (125), 86 states have internal predecessors, (125), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 07:33:47,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 149 transitions. [2023-11-19 07:33:47,530 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 149 transitions. Word has length 107 [2023-11-19 07:33:47,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:33:47,530 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 149 transitions. [2023-11-19 07:33:47,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 26.0) internal successors, (52), 2 states have internal predecessors, (52), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 2 states have call successors, (12) [2023-11-19 07:33:47,531 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 149 transitions. [2023-11-19 07:33:47,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-19 07:33:47,537 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:33:47,538 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:33:47,556 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:33:47,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-19 07:33:47,745 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:33:47,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:47,746 INFO L85 PathProgramCache]: Analyzing trace with hash 239181460, now seen corresponding path program 1 times [2023-11-19 07:33:47,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:47,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635982504] [2023-11-19 07:33:47,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:47,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:47,901 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:33:47,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1625377120] [2023-11-19 07:33:47,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:47,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:33:47,903 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:33:47,904 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:33:47,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:33:48,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:48,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-19 07:33:48,173 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:33:48,733 INFO L378 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 8 treesize of output 1 [2023-11-19 07:33:48,750 INFO L378 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 [2023-11-19 07:33:48,776 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-19 07:33:48,776 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:33:48,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:48,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635982504] [2023-11-19 07:33:48,776 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:33:48,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625377120] [2023-11-19 07:33:48,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1625377120] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:33:48,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:33:48,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:33:48,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332145603] [2023-11-19 07:33:48,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:33:48,779 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:33:48,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:48,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:33:48,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:33:48,781 INFO L87 Difference]: Start difference. First operand 100 states and 149 transitions. Second operand has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-19 07:33:48,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:33:48,950 INFO L93 Difference]: Finished difference Result 199 states and 298 transitions. [2023-11-19 07:33:48,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:33:48,951 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 107 [2023-11-19 07:33:48,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:33:48,958 INFO L225 Difference]: With dead ends: 199 [2023-11-19 07:33:48,959 INFO L226 Difference]: Without dead ends: 102 [2023-11-19 07:33:48,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:33:48,966 INFO L413 NwaCegarLoop]: 122 mSDtfsCounter, 109 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 362 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:33:48,967 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 362 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:33:48,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2023-11-19 07:33:48,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2023-11-19 07:33:48,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 87 states have (on average 1.4482758620689655) internal successors, (126), 87 states have internal predecessors, (126), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 07:33:48,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 150 transitions. [2023-11-19 07:33:48,994 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 150 transitions. Word has length 107 [2023-11-19 07:33:48,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:33:48,996 INFO L495 AbstractCegarLoop]: Abstraction has 101 states and 150 transitions. [2023-11-19 07:33:48,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.333333333333334) internal successors, (50), 5 states have internal predecessors, (50), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-19 07:33:48,997 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 150 transitions. [2023-11-19 07:33:49,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-19 07:33:49,004 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:33:49,005 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:33:49,029 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:33:49,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:33:49,220 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:33:49,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:49,220 INFO L85 PathProgramCache]: Analyzing trace with hash -1349166442, now seen corresponding path program 1 times [2023-11-19 07:33:49,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:49,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623719959] [2023-11-19 07:33:49,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:49,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:49,335 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:33:49,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1823115853] [2023-11-19 07:33:49,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:49,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:33:49,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:33:49,347 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:33:49,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:33:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:49,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-19 07:33:49,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:33:49,854 INFO L378 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 15 treesize of output 1 [2023-11-19 07:33:50,288 INFO L378 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 8 treesize of output 1 [2023-11-19 07:33:50,645 INFO L378 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 8 treesize of output 1 [2023-11-19 07:33:50,895 INFO L378 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 8 treesize of output 1 [2023-11-19 07:33:51,110 INFO L378 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 8 treesize of output 1 [2023-11-19 07:33:51,327 INFO L378 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 8 treesize of output 1 [2023-11-19 07:33:51,506 INFO L378 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 8 treesize of output 1 [2023-11-19 07:33:51,708 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:33:51,709 INFO L378 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 [2023-11-19 07:33:51,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:33:51,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:33:51,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:33:51,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:33:51,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:33:51,996 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 30 [2023-11-19 07:33:52,047 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:33:52,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:33:52,050 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 15 [2023-11-19 07:33:52,079 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 244 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2023-11-19 07:33:52,079 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:33:54,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:33:54,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623719959] [2023-11-19 07:33:54,993 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:33:54,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823115853] [2023-11-19 07:33:54,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1823115853] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:33:54,994 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:33:54,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2023-11-19 07:33:54,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575449267] [2023-11-19 07:33:54,995 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 07:33:54,995 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:33:54,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:33:54,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:33:54,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=414, Unknown=6, NotChecked=0, Total=552 [2023-11-19 07:33:54,998 INFO L87 Difference]: Start difference. First operand 101 states and 150 transitions. Second operand has 17 states, 17 states have (on average 4.0) internal successors, (68), 16 states have internal predecessors, (68), 7 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2023-11-19 07:33:56,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:33:56,986 INFO L93 Difference]: Finished difference Result 292 states and 436 transitions. [2023-11-19 07:33:56,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:33:56,989 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 16 states have internal predecessors, (68), 7 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) Word has length 107 [2023-11-19 07:33:56,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:33:56,991 INFO L225 Difference]: With dead ends: 292 [2023-11-19 07:33:56,991 INFO L226 Difference]: Without dead ends: 194 [2023-11-19 07:33:56,995 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=269, Invalid=655, Unknown=6, NotChecked=0, Total=930 [2023-11-19 07:33:56,999 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 1195 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 33 mSolverCounterUnsat, 9 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1195 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 9 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-19 07:33:57,000 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1195 Valid, 544 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 583 Invalid, 9 Unknown, 0 Unchecked, 1.3s Time] [2023-11-19 07:33:57,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2023-11-19 07:33:57,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 111. [2023-11-19 07:33:57,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 97 states have (on average 1.4536082474226804) internal successors, (141), 97 states have internal predecessors, (141), 12 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 07:33:57,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 165 transitions. [2023-11-19 07:33:57,023 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 165 transitions. Word has length 107 [2023-11-19 07:33:57,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:33:57,024 INFO L495 AbstractCegarLoop]: Abstraction has 111 states and 165 transitions. [2023-11-19 07:33:57,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.0) internal successors, (68), 16 states have internal predecessors, (68), 7 states have call successors, (12), 7 states have call predecessors, (12), 7 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2023-11-19 07:33:57,024 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 165 transitions. [2023-11-19 07:33:57,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-19 07:33:57,027 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:33:57,027 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:33:57,056 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:33:57,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:33:57,252 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:33:57,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:33:57,253 INFO L85 PathProgramCache]: Analyzing trace with hash -1091001004, now seen corresponding path program 1 times [2023-11-19 07:33:57,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:33:57,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389755969] [2023-11-19 07:33:57,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:57,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:33:57,322 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:33:57,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [249511892] [2023-11-19 07:33:57,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:33:57,324 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:33:57,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:33:57,326 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:33:57,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:33:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:33:57,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-19 07:33:57,548 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:33:57,826 INFO L378 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 15 treesize of output 1 [2023-11-19 07:33:58,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:33:58,591 INFO L378 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 23 treesize of output 16 [2023-11-19 07:33:59,147 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:33:59,149 INFO L378 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 23 treesize of output 16 [2023-11-19 07:33:59,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:33:59,536 INFO L378 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 23 treesize of output 16 [2023-11-19 07:33:59,866 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:33:59,867 INFO L378 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 23 treesize of output 16 [2023-11-19 07:34:00,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:00,197 INFO L378 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 23 treesize of output 16 [2023-11-19 07:34:00,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:00,508 INFO L378 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 23 treesize of output 16 [2023-11-19 07:34:00,830 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:00,832 INFO L378 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 30 treesize of output 21 [2023-11-19 07:34:01,144 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:01,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:01,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:01,149 INFO L378 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 43 treesize of output 35 [2023-11-19 07:34:01,157 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 07:34:01,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:01,400 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_306 (Array Int Int))) (< 255 (mod (select (select (store |c_#memory_int| |c_~#var_1_15~0.base| v_ArrVal_306) c_~var_1_7_Pointer~0.base) c_~var_1_7_Pointer~0.offset) 4294967296))) is different from false [2023-11-19 07:34:01,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:01,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389755969] [2023-11-19 07:34:01,409 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:01,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249511892] [2023-11-19 07:34:01,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249511892] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:01,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:34:01,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-11-19 07:34:01,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722500398] [2023-11-19 07:34:01,410 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:01,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:34:01,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:01,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:34:01,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=422, Unknown=1, NotChecked=42, Total=552 [2023-11-19 07:34:01,413 INFO L87 Difference]: Start difference. First operand 111 states and 165 transitions. Second operand has 18 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 8 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2023-11-19 07:34:04,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:04,012 INFO L93 Difference]: Finished difference Result 338 states and 503 transitions. [2023-11-19 07:34:04,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 07:34:04,013 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 8 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) Word has length 107 [2023-11-19 07:34:04,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:04,018 INFO L225 Difference]: With dead ends: 338 [2023-11-19 07:34:04,018 INFO L226 Difference]: Without dead ends: 230 [2023-11-19 07:34:04,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=267, Invalid=996, Unknown=1, NotChecked=68, Total=1332 [2023-11-19 07:34:04,023 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 803 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 803 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 888 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:04,023 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [803 Valid, 697 Invalid, 888 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-19 07:34:04,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-11-19 07:34:04,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 129. [2023-11-19 07:34:04,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 114 states have (on average 1.4473684210526316) internal successors, (165), 114 states have internal predecessors, (165), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 07:34:04,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 189 transitions. [2023-11-19 07:34:04,062 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 189 transitions. Word has length 107 [2023-11-19 07:34:04,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:04,063 INFO L495 AbstractCegarLoop]: Abstraction has 129 states and 189 transitions. [2023-11-19 07:34:04,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.176470588235294) internal successors, (71), 16 states have internal predecessors, (71), 8 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2023-11-19 07:34:04,063 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 189 transitions. [2023-11-19 07:34:04,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-19 07:34:04,073 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:04,073 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:04,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:04,299 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:04,299 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:04,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:04,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1176525970, now seen corresponding path program 1 times [2023-11-19 07:34:04,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:04,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144623754] [2023-11-19 07:34:04,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:04,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:04,356 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:04,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [492829253] [2023-11-19 07:34:04,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:04,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:04,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:04,358 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:04,379 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:34:04,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:04,570 INFO L262 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-19 07:34:04,575 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:05,347 INFO L378 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 8 treesize of output 1 [2023-11-19 07:34:05,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:05,447 INFO L378 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 19 treesize of output 14 [2023-11-19 07:34:05,481 INFO L378 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 [2023-11-19 07:34:05,499 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-19 07:34:05,500 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:34:05,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:05,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144623754] [2023-11-19 07:34:05,500 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:05,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492829253] [2023-11-19 07:34:05,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492829253] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:05,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:05,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-19 07:34:05,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693736944] [2023-11-19 07:34:05,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:05,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:34:05,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:05,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:34:05,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:34:05,504 INFO L87 Difference]: Start difference. First operand 129 states and 189 transitions. Second operand has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-19 07:34:06,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:06,174 INFO L93 Difference]: Finished difference Result 322 states and 475 transitions. [2023-11-19 07:34:06,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-19 07:34:06,175 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 108 [2023-11-19 07:34:06,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:06,177 INFO L225 Difference]: With dead ends: 322 [2023-11-19 07:34:06,178 INFO L226 Difference]: Without dead ends: 196 [2023-11-19 07:34:06,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:34:06,179 INFO L413 NwaCegarLoop]: 144 mSDtfsCounter, 256 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:06,180 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 528 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-19 07:34:06,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-11-19 07:34:06,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 137. [2023-11-19 07:34:06,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 122 states have (on average 1.4508196721311475) internal successors, (177), 122 states have internal predecessors, (177), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 07:34:06,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 201 transitions. [2023-11-19 07:34:06,197 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 201 transitions. Word has length 108 [2023-11-19 07:34:06,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:06,198 INFO L495 AbstractCegarLoop]: Abstraction has 137 states and 201 transitions. [2023-11-19 07:34:06,198 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 6.375) internal successors, (51), 7 states have internal predecessors, (51), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-19 07:34:06,198 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 201 transitions. [2023-11-19 07:34:06,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-19 07:34:06,200 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:06,200 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:06,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:06,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:06,423 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:06,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:06,423 INFO L85 PathProgramCache]: Analyzing trace with hash 120366373, now seen corresponding path program 1 times [2023-11-19 07:34:06,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:06,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661024162] [2023-11-19 07:34:06,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:06,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:06,466 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:06,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [890347126] [2023-11-19 07:34:06,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:06,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:06,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:06,468 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:06,495 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:34:06,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:06,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-19 07:34:06,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:06,881 INFO L378 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 15 treesize of output 1 [2023-11-19 07:34:07,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:07,393 INFO L378 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 23 treesize of output 16 [2023-11-19 07:34:07,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:07,729 INFO L378 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 23 treesize of output 16 [2023-11-19 07:34:07,979 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:07,983 INFO L378 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 23 treesize of output 16 [2023-11-19 07:34:08,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:08,219 INFO L378 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 23 treesize of output 16 [2023-11-19 07:34:08,425 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:08,426 INFO L378 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 23 treesize of output 16 [2023-11-19 07:34:08,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:08,575 INFO L378 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 23 treesize of output 16 [2023-11-19 07:34:08,761 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-19 07:34:08,762 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2023-11-19 07:34:08,987 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2023-11-19 07:34:08,987 INFO L378 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 33 treesize of output 13 [2023-11-19 07:34:09,076 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 07:34:09,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:09,310 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_455 (Array Int Int))) (< 255 (mod (select (select (store |c_#memory_int| |c_~#var_1_15~0.base| v_ArrVal_455) c_~var_1_7_Pointer~0.base) c_~var_1_7_Pointer~0.offset) 4294967296))) is different from false [2023-11-19 07:34:09,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:09,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661024162] [2023-11-19 07:34:09,327 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:09,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890347126] [2023-11-19 07:34:09,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890347126] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:09,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:34:09,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2023-11-19 07:34:09,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375290694] [2023-11-19 07:34:09,328 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:09,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-19 07:34:09,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:09,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-19 07:34:09,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=425, Unknown=1, NotChecked=42, Total=552 [2023-11-19 07:34:09,331 INFO L87 Difference]: Start difference. First operand 137 states and 201 transitions. Second operand has 19 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 8 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2023-11-19 07:34:11,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:11,992 INFO L93 Difference]: Finished difference Result 434 states and 642 transitions. [2023-11-19 07:34:11,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:34:11,993 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 8 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) Word has length 108 [2023-11-19 07:34:11,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:11,996 INFO L225 Difference]: With dead ends: 434 [2023-11-19 07:34:11,997 INFO L226 Difference]: Without dead ends: 300 [2023-11-19 07:34:11,998 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=283, Invalid=1052, Unknown=1, NotChecked=70, Total=1406 [2023-11-19 07:34:11,999 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 1092 mSDsluCounter, 1123 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 131 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1092 SdHoareTripleChecker+Valid, 1262 SdHoareTripleChecker+Invalid, 1192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:11,999 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1092 Valid, 1262 Invalid, 1192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 1055 Invalid, 6 Unknown, 0 Unchecked, 1.7s Time] [2023-11-19 07:34:12,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2023-11-19 07:34:12,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 154. [2023-11-19 07:34:12,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 139 states have (on average 1.4460431654676258) internal successors, (201), 139 states have internal predecessors, (201), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 07:34:12,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 225 transitions. [2023-11-19 07:34:12,016 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 225 transitions. Word has length 108 [2023-11-19 07:34:12,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:12,017 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 225 transitions. [2023-11-19 07:34:12,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 8 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2023-11-19 07:34:12,017 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 225 transitions. [2023-11-19 07:34:12,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2023-11-19 07:34:12,019 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:12,019 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:12,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-19 07:34:12,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-19 07:34:12,240 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:12,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:12,240 INFO L85 PathProgramCache]: Analyzing trace with hash -157052959, now seen corresponding path program 1 times [2023-11-19 07:34:12,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:12,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412070096] [2023-11-19 07:34:12,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:12,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:12,272 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:12,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1834562699] [2023-11-19 07:34:12,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:12,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:12,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:12,274 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:12,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:34:12,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:12,514 INFO L262 TraceCheckSpWp]: Trace formula consists of 488 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-19 07:34:12,521 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:12,793 INFO L378 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 15 treesize of output 1 [2023-11-19 07:34:13,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:13,661 INFO L378 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 23 treesize of output 16 [2023-11-19 07:34:14,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:14,169 INFO L378 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 23 treesize of output 16 [2023-11-19 07:34:14,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:14,509 INFO L378 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 23 treesize of output 16 [2023-11-19 07:34:14,846 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:14,847 INFO L378 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 23 treesize of output 16 [2023-11-19 07:34:15,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:15,183 INFO L378 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 23 treesize of output 16 [2023-11-19 07:34:15,494 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:15,495 INFO L378 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 23 treesize of output 16 [2023-11-19 07:34:15,842 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:15,844 INFO L378 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 23 treesize of output 16 [2023-11-19 07:34:15,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:15,956 INFO L378 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 30 treesize of output 21 [2023-11-19 07:34:16,218 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:16,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:16,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:16,222 INFO L378 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 43 treesize of output 35 [2023-11-19 07:34:16,234 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 248 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 07:34:16,234 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:16,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:16,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412070096] [2023-11-19 07:34:16,595 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:16,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834562699] [2023-11-19 07:34:16,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834562699] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:16,595 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:34:16,595 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2023-11-19 07:34:16,595 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580923751] [2023-11-19 07:34:16,595 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:16,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:34:16,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:16,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:34:16,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=521, Unknown=8, NotChecked=0, Total=650 [2023-11-19 07:34:16,598 INFO L87 Difference]: Start difference. First operand 154 states and 225 transitions. Second operand has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 8 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2023-11-19 07:34:18,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:18,438 INFO L93 Difference]: Finished difference Result 357 states and 523 transitions. [2023-11-19 07:34:18,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-19 07:34:18,439 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 8 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) Word has length 108 [2023-11-19 07:34:18,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:18,442 INFO L225 Difference]: With dead ends: 357 [2023-11-19 07:34:18,442 INFO L226 Difference]: Without dead ends: 206 [2023-11-19 07:34:18,443 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=275, Invalid=907, Unknown=8, NotChecked=0, Total=1190 [2023-11-19 07:34:18,444 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 617 mSDsluCounter, 450 mSDsCounter, 0 mSdLazyCounter, 657 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:18,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [629 Valid, 532 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 657 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 07:34:18,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2023-11-19 07:34:18,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 156. [2023-11-19 07:34:18,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 141 states have (on average 1.4326241134751774) internal successors, (202), 141 states have internal predecessors, (202), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 07:34:18,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 226 transitions. [2023-11-19 07:34:18,460 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 226 transitions. Word has length 108 [2023-11-19 07:34:18,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:18,461 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 226 transitions. [2023-11-19 07:34:18,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.789473684210526) internal successors, (72), 17 states have internal predecessors, (72), 8 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 8 states have call predecessors, (12), 8 states have call successors, (12) [2023-11-19 07:34:18,461 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 226 transitions. [2023-11-19 07:34:18,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-19 07:34:18,463 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:18,463 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:18,486 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:18,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-19 07:34:18,686 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:18,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:18,686 INFO L85 PathProgramCache]: Analyzing trace with hash -712633671, now seen corresponding path program 1 times [2023-11-19 07:34:18,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:18,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556937799] [2023-11-19 07:34:18,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:18,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:18,719 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:18,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1574556143] [2023-11-19 07:34:18,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:18,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:18,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:18,752 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:18,762 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:34:18,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:18,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-19 07:34:18,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:19,179 INFO L378 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 15 treesize of output 1 [2023-11-19 07:34:19,713 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:19,714 INFO L378 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 16 treesize of output 11 [2023-11-19 07:34:20,064 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:20,065 INFO L378 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 16 treesize of output 11 [2023-11-19 07:34:20,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:20,305 INFO L378 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 16 treesize of output 11 [2023-11-19 07:34:20,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:20,507 INFO L378 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 16 treesize of output 11 [2023-11-19 07:34:20,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:20,720 INFO L378 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 16 treesize of output 11 [2023-11-19 07:34:20,910 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:20,915 INFO L378 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 16 treesize of output 11 [2023-11-19 07:34:21,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:21,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:21,234 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2023-11-19 07:34:21,234 INFO L378 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 25 treesize of output 23 [2023-11-19 07:34:21,290 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-19 07:34:21,290 INFO L378 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 24 treesize of output 24 [2023-11-19 07:34:21,344 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 07:34:21,344 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:21,387 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_630 (Array Int Int))) (= (mod (select (select (store |c_#memory_int| c_~var_1_14_Pointer~0.base v_ArrVal_630) c_~var_1_11_Pointer~0.base) c_~var_1_11_Pointer~0.offset) 256) 0)) is different from false [2023-11-19 07:34:21,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:21,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556937799] [2023-11-19 07:34:21,651 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:21,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574556143] [2023-11-19 07:34:21,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574556143] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:21,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:34:21,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2023-11-19 07:34:21,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339327550] [2023-11-19 07:34:21,651 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:21,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:34:21,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:21,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:34:21,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=344, Unknown=1, NotChecked=38, Total=462 [2023-11-19 07:34:21,653 INFO L87 Difference]: Start difference. First operand 156 states and 226 transitions. Second operand has 18 states, 17 states have (on average 4.294117647058823) internal successors, (73), 16 states have internal predecessors, (73), 8 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2023-11-19 07:34:23,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:23,691 INFO L93 Difference]: Finished difference Result 435 states and 634 transitions. [2023-11-19 07:34:23,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-19 07:34:23,696 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 4.294117647058823) internal successors, (73), 16 states have internal predecessors, (73), 8 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) Word has length 109 [2023-11-19 07:34:23,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:23,701 INFO L225 Difference]: With dead ends: 435 [2023-11-19 07:34:23,701 INFO L226 Difference]: Without dead ends: 280 [2023-11-19 07:34:23,703 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=264, Invalid=929, Unknown=1, NotChecked=66, Total=1260 [2023-11-19 07:34:23,705 INFO L413 NwaCegarLoop]: 110 mSDtfsCounter, 591 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 65 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 591 SdHoareTripleChecker+Valid, 802 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:23,705 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [591 Valid, 802 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 727 Invalid, 1 Unknown, 0 Unchecked, 1.1s Time] [2023-11-19 07:34:23,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2023-11-19 07:34:23,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 166. [2023-11-19 07:34:23,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 151 states have (on average 1.4172185430463575) internal successors, (214), 151 states have internal predecessors, (214), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 07:34:23,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 238 transitions. [2023-11-19 07:34:23,725 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 238 transitions. Word has length 109 [2023-11-19 07:34:23,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:23,726 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 238 transitions. [2023-11-19 07:34:23,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 4.294117647058823) internal successors, (73), 16 states have internal predecessors, (73), 8 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12) [2023-11-19 07:34:23,727 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 238 transitions. [2023-11-19 07:34:23,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-19 07:34:23,729 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:23,729 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:23,752 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:23,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:23,948 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:23,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:23,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1336886576, now seen corresponding path program 1 times [2023-11-19 07:34:23,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:23,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354506742] [2023-11-19 07:34:23,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:23,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:23,978 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:23,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1587231091] [2023-11-19 07:34:23,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:23,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:23,979 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:23,980 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:23,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:34:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:24,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-19 07:34:24,205 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:24,615 INFO L378 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 8 treesize of output 1 [2023-11-19 07:34:24,625 INFO L378 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 [2023-11-19 07:34:24,646 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-19 07:34:24,646 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:34:24,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:24,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354506742] [2023-11-19 07:34:24,647 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:24,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587231091] [2023-11-19 07:34:24,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587231091] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:24,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:24,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:34:24,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426832510] [2023-11-19 07:34:24,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:24,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-19 07:34:24,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:24,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-19 07:34:24,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:34:24,653 INFO L87 Difference]: Start difference. First operand 166 states and 238 transitions. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-19 07:34:24,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:24,804 INFO L93 Difference]: Finished difference Result 356 states and 514 transitions. [2023-11-19 07:34:24,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:34:24,808 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 109 [2023-11-19 07:34:24,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:24,810 INFO L225 Difference]: With dead ends: 356 [2023-11-19 07:34:24,810 INFO L226 Difference]: Without dead ends: 193 [2023-11-19 07:34:24,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:34:24,811 INFO L413 NwaCegarLoop]: 153 mSDtfsCounter, 259 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:24,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [259 Valid, 364 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 07:34:24,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-11-19 07:34:24,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 166. [2023-11-19 07:34:24,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 151 states have (on average 1.4172185430463575) internal successors, (214), 151 states have internal predecessors, (214), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 07:34:24,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 238 transitions. [2023-11-19 07:34:24,846 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 238 transitions. Word has length 109 [2023-11-19 07:34:24,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:24,847 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 238 transitions. [2023-11-19 07:34:24,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 5 states have internal predecessors, (52), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-19 07:34:24,848 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 238 transitions. [2023-11-19 07:34:24,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-19 07:34:24,852 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:24,852 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:24,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:25,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:25,062 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:25,062 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:25,062 INFO L85 PathProgramCache]: Analyzing trace with hash 1595052014, now seen corresponding path program 1 times [2023-11-19 07:34:25,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:25,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942425456] [2023-11-19 07:34:25,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:25,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:25,094 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:25,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1130700212] [2023-11-19 07:34:25,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:25,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:25,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:25,096 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:25,108 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:34:25,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:25,331 INFO L262 TraceCheckSpWp]: Trace formula consists of 476 conjuncts, 3 conjunts are in the unsatisfiable core [2023-11-19 07:34:25,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:25,346 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-19 07:34:25,347 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:34:25,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:25,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942425456] [2023-11-19 07:34:25,347 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:25,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130700212] [2023-11-19 07:34:25,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130700212] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:34:25,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:34:25,348 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-19 07:34:25,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239368568] [2023-11-19 07:34:25,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:25,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:34:25,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:25,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:34:25,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:34:25,350 INFO L87 Difference]: Start difference. First operand 166 states and 238 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-19 07:34:25,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:25,375 INFO L93 Difference]: Finished difference Result 326 states and 469 transitions. [2023-11-19 07:34:25,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:34:25,376 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 109 [2023-11-19 07:34:25,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:25,378 INFO L225 Difference]: With dead ends: 326 [2023-11-19 07:34:25,378 INFO L226 Difference]: Without dead ends: 163 [2023-11-19 07:34:25,379 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:34:25,380 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 0 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 7 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 290 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 7 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:25,381 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 290 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 7 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 07:34:25,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-11-19 07:34:25,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2023-11-19 07:34:25,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 148 states have (on average 1.4054054054054055) internal successors, (208), 148 states have internal predecessors, (208), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 07:34:25,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 232 transitions. [2023-11-19 07:34:25,395 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 232 transitions. Word has length 109 [2023-11-19 07:34:25,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:25,396 INFO L495 AbstractCegarLoop]: Abstraction has 163 states and 232 transitions. [2023-11-19 07:34:25,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-19 07:34:25,396 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 232 transitions. [2023-11-19 07:34:25,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2023-11-19 07:34:25,399 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:25,399 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:25,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:25,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:25,617 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:25,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:25,618 INFO L85 PathProgramCache]: Analyzing trace with hash -992015304, now seen corresponding path program 1 times [2023-11-19 07:34:25,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:25,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241224632] [2023-11-19 07:34:25,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:25,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:25,657 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:25,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886901836] [2023-11-19 07:34:25,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:25,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:25,657 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:25,658 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:25,675 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:34:25,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:25,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 58 conjunts are in the unsatisfiable core [2023-11-19 07:34:25,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:26,108 INFO L378 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 15 treesize of output 1 [2023-11-19 07:34:26,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:26,621 INFO L378 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 23 treesize of output 16 [2023-11-19 07:34:26,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:26,931 INFO L378 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 23 treesize of output 16 [2023-11-19 07:34:27,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:27,138 INFO L378 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 23 treesize of output 16 [2023-11-19 07:34:27,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:27,340 INFO L378 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 23 treesize of output 16 [2023-11-19 07:34:27,542 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:27,543 INFO L378 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 23 treesize of output 16 [2023-11-19 07:34:27,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:27,711 INFO L378 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 23 treesize of output 16 [2023-11-19 07:34:27,860 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:27,861 INFO L378 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 23 treesize of output 16 [2023-11-19 07:34:27,911 INFO L349 Elim1Store]: treesize reduction 25, result has 21.9 percent of original size [2023-11-19 07:34:27,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 30 treesize of output 21 [2023-11-19 07:34:28,321 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:28,340 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2023-11-19 07:34:28,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 40 treesize of output 28 [2023-11-19 07:34:28,405 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 07:34:28,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:28,821 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2023-11-19 07:34:28,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:28,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241224632] [2023-11-19 07:34:28,822 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:28,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886901836] [2023-11-19 07:34:28,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886901836] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:28,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:34:28,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [20] total 28 [2023-11-19 07:34:28,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263948274] [2023-11-19 07:34:28,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:34:28,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-19 07:34:28,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:28,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-19 07:34:28,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=652, Unknown=0, NotChecked=0, Total=756 [2023-11-19 07:34:28,825 INFO L87 Difference]: Start difference. First operand 163 states and 232 transitions. Second operand has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-19 07:34:30,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 07:34:30,134 INFO L93 Difference]: Finished difference Result 480 states and 695 transitions. [2023-11-19 07:34:30,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:34:30,134 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) Word has length 109 [2023-11-19 07:34:30,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 07:34:30,137 INFO L225 Difference]: With dead ends: 480 [2023-11-19 07:34:30,137 INFO L226 Difference]: Without dead ends: 320 [2023-11-19 07:34:30,138 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2023-11-19 07:34:30,139 INFO L413 NwaCegarLoop]: 161 mSDtfsCounter, 472 mSDsluCounter, 802 mSDsCounter, 0 mSdLazyCounter, 491 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 963 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 491 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-19 07:34:30,139 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 963 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 491 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-19 07:34:30,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2023-11-19 07:34:30,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 168. [2023-11-19 07:34:30,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 153 states have (on average 1.4052287581699345) internal successors, (215), 153 states have internal predecessors, (215), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2023-11-19 07:34:30,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 239 transitions. [2023-11-19 07:34:30,155 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 239 transitions. Word has length 109 [2023-11-19 07:34:30,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 07:34:30,156 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 239 transitions. [2023-11-19 07:34:30,156 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.777777777777778) internal successors, (52), 9 states have internal predecessors, (52), 1 states have call successors, (12), 1 states have call predecessors, (12), 1 states have return successors, (12), 1 states have call predecessors, (12), 1 states have call successors, (12) [2023-11-19 07:34:30,157 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 239 transitions. [2023-11-19 07:34:30,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-19 07:34:30,158 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 07:34:30,158 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:34:30,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:34:30,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:30,371 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 07:34:30,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:34:30,372 INFO L85 PathProgramCache]: Analyzing trace with hash 2131905354, now seen corresponding path program 1 times [2023-11-19 07:34:30,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:34:30,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739639611] [2023-11-19 07:34:30,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:30,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:34:30,405 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-19 07:34:30,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1893963666] [2023-11-19 07:34:30,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:34:30,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:34:30,406 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:34:30,407 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:34:30,412 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e548201-e57a-4a56-8f9b-e265d1b3d2f2/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:34:30,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:34:30,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-19 07:34:30,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:34:30,830 INFO L378 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 15 treesize of output 1 [2023-11-19 07:34:31,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:31,248 INFO L378 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 16 treesize of output 11 [2023-11-19 07:34:31,504 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:31,505 INFO L378 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 16 treesize of output 11 [2023-11-19 07:34:31,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:31,720 INFO L378 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 16 treesize of output 11 [2023-11-19 07:34:31,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:31,899 INFO L378 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 16 treesize of output 11 [2023-11-19 07:34:32,081 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:32,082 INFO L378 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 16 treesize of output 11 [2023-11-19 07:34:32,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:32,210 INFO L378 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 16 treesize of output 11 [2023-11-19 07:34:32,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-19 07:34:32,356 INFO L378 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 16 treesize of output 11 [2023-11-19 07:34:32,396 INFO L378 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 [2023-11-19 07:34:32,415 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 1 proven. 247 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2023-11-19 07:34:32,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:34:32,491 WARN L854 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_922 (Array Int Int))) (< 510 (select (select (store |c_#memory_int| c_~var_1_14_Pointer~0.base v_ArrVal_922) c_~var_1_7_Pointer~0.base) c_~var_1_7_Pointer~0.offset))) is different from false [2023-11-19 07:34:32,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:34:32,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739639611] [2023-11-19 07:34:32,517 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-19 07:34:32,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893963666] [2023-11-19 07:34:32,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893963666] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:34:32,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:34:32,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2023-11-19 07:34:32,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299681396] [2023-11-19 07:34:32,518 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-19 07:34:32,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:34:32,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:34:32,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:34:32,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=232, Unknown=1, NotChecked=32, Total=342 [2023-11-19 07:34:32,519 INFO L87 Difference]: Start difference. First operand 168 states and 239 transitions. Second operand has 16 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 8 states have call successors, (12), 8 states have call predecessors, (12), 8 states have return successors, (12), 7 states have call predecessors, (12), 8 states have call successors, (12)