./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-65.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-65.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme --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 e97158367eba7489c22eb7c3ebc31635a6b2e61c62508904380d58d51292aae4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-26 12:02:09,014 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-26 12:02:09,120 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-26 12:02:09,126 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-26 12:02:09,127 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-26 12:02:09,155 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-26 12:02:09,156 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-26 12:02:09,157 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-26 12:02:09,158 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-26 12:02:09,158 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-26 12:02:09,159 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-26 12:02:09,160 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-26 12:02:09,161 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-26 12:02:09,161 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-26 12:02:09,162 INFO L153 SettingsManager]: * Use SBE=true [2023-11-26 12:02:09,162 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-26 12:02:09,163 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-26 12:02:09,164 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-26 12:02:09,164 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-26 12:02:09,165 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-26 12:02:09,166 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-26 12:02:09,166 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-26 12:02:09,167 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-26 12:02:09,168 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-26 12:02:09,168 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-26 12:02:09,169 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-26 12:02:09,169 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-26 12:02:09,170 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-26 12:02:09,171 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-26 12:02:09,171 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-26 12:02:09,176 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-26 12:02:09,177 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:02:09,178 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-26 12:02:09,178 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-26 12:02:09,179 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-26 12:02:09,179 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-26 12:02:09,179 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-26 12:02:09,179 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-26 12:02:09,180 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-26 12:02:09,180 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-26 12:02:09,180 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-26 12:02:09,181 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-26 12:02:09,181 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_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e97158367eba7489c22eb7c3ebc31635a6b2e61c62508904380d58d51292aae4 [2023-11-26 12:02:09,475 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-26 12:02:09,509 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-26 12:02:09,513 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-26 12:02:09,514 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-26 12:02:09,514 INFO L274 PluginConnector]: CDTParser initialized [2023-11-26 12:02:09,516 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-65.i [2023-11-26 12:02:12,768 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-26 12:02:13,037 INFO L384 CDTParser]: Found 1 translation units. [2023-11-26 12:02:13,038 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-65.i [2023-11-26 12:02:13,052 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/data/d67f2f5a2/aea2f2ef5ae94a698caf73d840eef721/FLAG1908b9c7f [2023-11-26 12:02:13,081 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/data/d67f2f5a2/aea2f2ef5ae94a698caf73d840eef721 [2023-11-26 12:02:13,088 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-26 12:02:13,090 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-26 12:02:13,094 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-26 12:02:13,096 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-26 12:02:13,102 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-26 12:02:13,103 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:02:13" (1/1) ... [2023-11-26 12:02:13,105 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bd8f54b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:13, skipping insertion in model container [2023-11-26 12:02:13,105 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.11 12:02:13" (1/1) ... [2023-11-26 12:02:13,175 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-26 12:02:13,393 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_6d9edb66-969c-46f3-bb87-1fa7fc53e381/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-65.i[916,929] [2023-11-26 12:02:13,632 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:02:13,647 INFO L202 MainTranslator]: Completed pre-run [2023-11-26 12:02:13,660 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_6d9edb66-969c-46f3-bb87-1fa7fc53e381/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount250_file-65.i[916,929] [2023-11-26 12:02:13,740 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-26 12:02:13,761 INFO L206 MainTranslator]: Completed translation [2023-11-26 12:02:13,762 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:13 WrapperNode [2023-11-26 12:02:13,762 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-26 12:02:13,764 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-26 12:02:13,764 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-26 12:02:13,764 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-26 12:02:13,773 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:13" (1/1) ... [2023-11-26 12:02:13,799 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:13" (1/1) ... [2023-11-26 12:02:13,915 INFO L138 Inliner]: procedures = 26, calls = 64, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 389 [2023-11-26 12:02:13,915 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-26 12:02:13,916 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-26 12:02:13,916 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-26 12:02:13,916 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-26 12:02:13,929 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:13" (1/1) ... [2023-11-26 12:02:13,929 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:13" (1/1) ... [2023-11-26 12:02:13,941 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:13" (1/1) ... [2023-11-26 12:02:14,059 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-26 12:02:14,059 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:13" (1/1) ... [2023-11-26 12:02:14,059 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:13" (1/1) ... [2023-11-26 12:02:14,119 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:13" (1/1) ... [2023-11-26 12:02:14,140 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:13" (1/1) ... [2023-11-26 12:02:14,148 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:13" (1/1) ... [2023-11-26 12:02:14,157 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:13" (1/1) ... [2023-11-26 12:02:14,169 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-26 12:02:14,170 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-26 12:02:14,171 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-26 12:02:14,171 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-26 12:02:14,172 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:13" (1/1) ... [2023-11-26 12:02:14,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-26 12:02:14,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:14,206 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-26 12:02:14,236 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-26 12:02:14,261 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-26 12:02:14,261 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-26 12:02:14,263 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-26 12:02:14,263 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-26 12:02:14,263 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-26 12:02:14,263 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-26 12:02:14,394 INFO L241 CfgBuilder]: Building ICFG [2023-11-26 12:02:14,397 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-26 12:02:15,361 INFO L282 CfgBuilder]: Performing block encoding [2023-11-26 12:02:15,420 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-26 12:02:15,420 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-26 12:02:15,424 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:02:15 BoogieIcfgContainer [2023-11-26 12:02:15,424 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-26 12:02:15,430 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-26 12:02:15,430 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-26 12:02:15,434 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-26 12:02:15,435 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.11 12:02:13" (1/3) ... [2023-11-26 12:02:15,436 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@150ad0c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:02:15, skipping insertion in model container [2023-11-26 12:02:15,437 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.11 12:02:13" (2/3) ... [2023-11-26 12:02:15,439 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@150ad0c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.11 12:02:15, skipping insertion in model container [2023-11-26 12:02:15,439 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.11 12:02:15" (3/3) ... [2023-11-26 12:02:15,442 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount250_file-65.i [2023-11-26 12:02:15,464 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-26 12:02:15,465 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-26 12:02:15,544 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-26 12:02:15,553 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;@26d6931e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-26 12:02:15,554 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-26 12:02:15,560 INFO L276 IsEmpty]: Start isEmpty. Operand has 154 states, 100 states have (on average 1.49) internal successors, (149), 101 states have internal predecessors, (149), 51 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-26 12:02:15,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-11-26 12:02:15,604 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:02:15,606 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:02:15,606 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:02:15,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:15,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1957533417, now seen corresponding path program 1 times [2023-11-26 12:02:15,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:15,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558036832] [2023-11-26 12:02:15,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:15,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:15,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:16,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:16,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558036832] [2023-11-26 12:02:16,041 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-26 12:02:16,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267468378] [2023-11-26 12:02:16,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:16,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:16,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:16,046 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:02:16,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-26 12:02:16,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:16,453 INFO L262 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-26 12:02:16,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:02:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 5000 trivial. 0 not checked. [2023-11-26 12:02:16,538 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:02:16,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267468378] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:02:16,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:02:16,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-26 12:02:16,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639273410] [2023-11-26 12:02:16,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:02:16,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-26 12:02:16,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:16,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-26 12:02:16,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 12:02:16,591 INFO L87 Difference]: Start difference. First operand has 154 states, 100 states have (on average 1.49) internal successors, (149), 101 states have internal predecessors, (149), 51 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) Second operand has 2 states, 2 states have (on average 40.5) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 2 states have call successors, (51) [2023-11-26 12:02:16,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:02:16,660 INFO L93 Difference]: Finished difference Result 305 states and 551 transitions. [2023-11-26 12:02:16,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-26 12:02:16,663 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 40.5) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 2 states have call successors, (51) Word has length 331 [2023-11-26 12:02:16,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:02:16,674 INFO L225 Difference]: With dead ends: 305 [2023-11-26 12:02:16,675 INFO L226 Difference]: Without dead ends: 152 [2023-11-26 12:02:16,684 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-26 12:02:16,688 INFO L413 NwaCegarLoop]: 243 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-26 12:02:16,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 243 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-26 12:02:16,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-26 12:02:16,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2023-11-26 12:02:16,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 99 states have (on average 1.4545454545454546) internal successors, (144), 99 states have internal predecessors, (144), 51 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-26 12:02:16,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 246 transitions. [2023-11-26 12:02:16,753 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 246 transitions. Word has length 331 [2023-11-26 12:02:16,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:02:16,753 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 246 transitions. [2023-11-26 12:02:16,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 40.5) internal successors, (81), 2 states have internal predecessors, (81), 2 states have call successors, (51), 2 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 2 states have call successors, (51) [2023-11-26 12:02:16,754 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 246 transitions. [2023-11-26 12:02:16,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2023-11-26 12:02:16,762 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:02:16,762 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:02:16,776 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-26 12:02:16,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-26 12:02:16,971 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:02:16,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:16,972 INFO L85 PathProgramCache]: Analyzing trace with hash 1831709453, now seen corresponding path program 1 times [2023-11-26 12:02:16,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:16,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470134550] [2023-11-26 12:02:16,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:16,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:17,189 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:02:17,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1946209364] [2023-11-26 12:02:17,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:17,195 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:17,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:17,200 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:02:17,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-26 12:02:17,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:17,527 INFO L262 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-26 12:02:17,563 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:02:17,697 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-26 12:02:17,698 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:02:17,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:17,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470134550] [2023-11-26 12:02:17,699 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:02:17,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946209364] [2023-11-26 12:02:17,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946209364] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:02:17,699 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:02:17,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-26 12:02:17,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872955170] [2023-11-26 12:02:17,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:02:17,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:02:17,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:17,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:02:17,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:02:17,710 INFO L87 Difference]: Start difference. First operand 152 states and 246 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:02:17,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:02:17,948 INFO L93 Difference]: Finished difference Result 456 states and 738 transitions. [2023-11-26 12:02:17,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:02:17,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 331 [2023-11-26 12:02:17,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:02:17,956 INFO L225 Difference]: With dead ends: 456 [2023-11-26 12:02:17,957 INFO L226 Difference]: Without dead ends: 305 [2023-11-26 12:02:17,958 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:02:17,960 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 242 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 1079 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:02:17,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 1079 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:02:17,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2023-11-26 12:02:17,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 167. [2023-11-26 12:02:17,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 114 states have (on average 1.4649122807017543) internal successors, (167), 114 states have internal predecessors, (167), 51 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-26 12:02:17,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 269 transitions. [2023-11-26 12:02:17,998 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 269 transitions. Word has length 331 [2023-11-26 12:02:18,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:02:18,001 INFO L495 AbstractCegarLoop]: Abstraction has 167 states and 269 transitions. [2023-11-26 12:02:18,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:02:18,002 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 269 transitions. [2023-11-26 12:02:18,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2023-11-26 12:02:18,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:02:18,009 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:02:18,028 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-26 12:02:18,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:18,218 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:02:18,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:18,219 INFO L85 PathProgramCache]: Analyzing trace with hash 145191608, now seen corresponding path program 1 times [2023-11-26 12:02:18,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:18,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458090796] [2023-11-26 12:02:18,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:18,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:18,307 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:02:18,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1803728563] [2023-11-26 12:02:18,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:18,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:18,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:18,310 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:02:18,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-26 12:02:18,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:18,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 818 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-26 12:02:18,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:02:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-26 12:02:18,705 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:02:18,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:18,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458090796] [2023-11-26 12:02:18,706 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:02:18,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1803728563] [2023-11-26 12:02:18,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1803728563] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:02:18,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:02:18,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:02:18,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564953803] [2023-11-26 12:02:18,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:02:18,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-26 12:02:18,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:18,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-26 12:02:18,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:02:18,710 INFO L87 Difference]: Start difference. First operand 167 states and 269 transitions. Second operand has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:02:18,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:02:18,829 INFO L93 Difference]: Finished difference Result 469 states and 756 transitions. [2023-11-26 12:02:18,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-26 12:02:18,830 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 332 [2023-11-26 12:02:18,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:02:18,842 INFO L225 Difference]: With dead ends: 469 [2023-11-26 12:02:18,842 INFO L226 Difference]: Without dead ends: 303 [2023-11-26 12:02:18,844 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 331 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-26 12:02:18,847 INFO L413 NwaCegarLoop]: 298 mSDtfsCounter, 223 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 223 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-26 12:02:18,848 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [223 Valid, 525 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-26 12:02:18,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2023-11-26 12:02:18,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 177. [2023-11-26 12:02:18,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 124 states have (on average 1.467741935483871) internal successors, (182), 124 states have internal predecessors, (182), 51 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-26 12:02:18,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 284 transitions. [2023-11-26 12:02:18,900 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 284 transitions. Word has length 332 [2023-11-26 12:02:18,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:02:18,902 INFO L495 AbstractCegarLoop]: Abstraction has 177 states and 284 transitions. [2023-11-26 12:02:18,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.666666666666668) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:02:18,903 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 284 transitions. [2023-11-26 12:02:18,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2023-11-26 12:02:18,911 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:02:18,911 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:02:18,924 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-26 12:02:19,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:19,120 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:02:19,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:19,121 INFO L85 PathProgramCache]: Analyzing trace with hash 1040762068, now seen corresponding path program 1 times [2023-11-26 12:02:19,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:19,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8310102] [2023-11-26 12:02:19,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:19,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:19,233 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:02:19,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1178950870] [2023-11-26 12:02:19,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:19,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:19,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:19,236 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:02:19,262 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-26 12:02:19,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:19,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-26 12:02:19,552 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:02:19,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2594 proven. 78 refuted. 0 times theorem prover too weak. 2428 trivial. 0 not checked. [2023-11-26 12:02:19,935 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:02:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 72 proven. 78 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2023-11-26 12:02:20,377 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:20,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8310102] [2023-11-26 12:02:20,378 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:02:20,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178950870] [2023-11-26 12:02:20,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1178950870] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:02:20,379 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:02:20,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2023-11-26 12:02:20,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956527577] [2023-11-26 12:02:20,379 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:02:20,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-26 12:02:20,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:20,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-26 12:02:20,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 12:02:20,385 INFO L87 Difference]: Start difference. First operand 177 states and 284 transitions. Second operand has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 3 states have call successors, (77), 2 states have call predecessors, (77), 4 states have return successors, (78), 3 states have call predecessors, (78), 3 states have call successors, (78) [2023-11-26 12:02:20,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:02:20,862 INFO L93 Difference]: Finished difference Result 359 states and 572 transitions. [2023-11-26 12:02:20,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-26 12:02:20,863 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 3 states have call successors, (77), 2 states have call predecessors, (77), 4 states have return successors, (78), 3 states have call predecessors, (78), 3 states have call successors, (78) Word has length 332 [2023-11-26 12:02:20,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:02:20,868 INFO L225 Difference]: With dead ends: 359 [2023-11-26 12:02:20,868 INFO L226 Difference]: Without dead ends: 183 [2023-11-26 12:02:20,869 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 666 GetRequests, 656 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2023-11-26 12:02:20,872 INFO L413 NwaCegarLoop]: 183 mSDtfsCounter, 128 mSDsluCounter, 265 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-26 12:02:20,874 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 448 Invalid, 291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-26 12:02:20,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-11-26 12:02:20,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2023-11-26 12:02:20,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 127 states have (on average 1.4330708661417322) internal successors, (182), 127 states have internal predecessors, (182), 51 states have call successors, (51), 2 states have call predecessors, (51), 2 states have return successors, (51), 51 states have call predecessors, (51), 51 states have call successors, (51) [2023-11-26 12:02:20,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 284 transitions. [2023-11-26 12:02:20,902 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 284 transitions. Word has length 332 [2023-11-26 12:02:20,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:02:20,903 INFO L495 AbstractCegarLoop]: Abstraction has 181 states and 284 transitions. [2023-11-26 12:02:20,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 16.25) internal successors, (130), 8 states have internal predecessors, (130), 3 states have call successors, (77), 2 states have call predecessors, (77), 4 states have return successors, (78), 3 states have call predecessors, (78), 3 states have call successors, (78) [2023-11-26 12:02:20,904 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 284 transitions. [2023-11-26 12:02:20,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2023-11-26 12:02:20,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:02:20,910 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:02:20,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-26 12:02:21,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:21,119 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:02:21,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:21,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1117764648, now seen corresponding path program 1 times [2023-11-26 12:02:21,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:21,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227231054] [2023-11-26 12:02:21,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:21,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:21,193 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:02:21,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [565861578] [2023-11-26 12:02:21,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:21,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:21,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:21,195 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:02:21,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-26 12:02:21,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:21,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-26 12:02:21,480 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:02:23,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 1895 proven. 234 refuted. 0 times theorem prover too weak. 2971 trivial. 0 not checked. [2023-11-26 12:02:23,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:02:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 60 proven. 237 refuted. 0 times theorem prover too weak. 4803 trivial. 0 not checked. [2023-11-26 12:02:24,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:24,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227231054] [2023-11-26 12:02:24,855 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:02:24,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565861578] [2023-11-26 12:02:24,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565861578] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:02:24,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:02:24,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 22 [2023-11-26 12:02:24,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923491005] [2023-11-26 12:02:24,863 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:02:24,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-26 12:02:24,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:24,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-26 12:02:24,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2023-11-26 12:02:24,869 INFO L87 Difference]: Start difference. First operand 181 states and 284 transitions. Second operand has 22 states, 22 states have (on average 7.636363636363637) internal successors, (168), 22 states have internal predecessors, (168), 6 states have call successors, (102), 4 states have call predecessors, (102), 8 states have return successors, (102), 6 states have call predecessors, (102), 6 states have call successors, (102) [2023-11-26 12:02:27,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:02:27,721 INFO L93 Difference]: Finished difference Result 605 states and 937 transitions. [2023-11-26 12:02:27,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-26 12:02:27,722 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 7.636363636363637) internal successors, (168), 22 states have internal predecessors, (168), 6 states have call successors, (102), 4 states have call predecessors, (102), 8 states have return successors, (102), 6 states have call predecessors, (102), 6 states have call successors, (102) Word has length 332 [2023-11-26 12:02:27,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:02:27,726 INFO L225 Difference]: With dead ends: 605 [2023-11-26 12:02:27,726 INFO L226 Difference]: Without dead ends: 425 [2023-11-26 12:02:27,728 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 684 GetRequests, 645 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=429, Invalid=1211, Unknown=0, NotChecked=0, Total=1640 [2023-11-26 12:02:27,729 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 1044 mSDsluCounter, 1309 mSDsCounter, 0 mSdLazyCounter, 1698 mSolverCounterSat, 407 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1048 SdHoareTripleChecker+Valid, 1459 SdHoareTripleChecker+Invalid, 2105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 407 IncrementalHoareTripleChecker+Valid, 1698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-26 12:02:27,732 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1048 Valid, 1459 Invalid, 2105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [407 Valid, 1698 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-26 12:02:27,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2023-11-26 12:02:27,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 371. [2023-11-26 12:02:27,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 261 states have (on average 1.417624521072797) internal successors, (370), 261 states have internal predecessors, (370), 102 states have call successors, (102), 7 states have call predecessors, (102), 7 states have return successors, (102), 102 states have call predecessors, (102), 102 states have call successors, (102) [2023-11-26 12:02:27,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 574 transitions. [2023-11-26 12:02:27,827 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 574 transitions. Word has length 332 [2023-11-26 12:02:27,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:02:27,828 INFO L495 AbstractCegarLoop]: Abstraction has 371 states and 574 transitions. [2023-11-26 12:02:27,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 7.636363636363637) internal successors, (168), 22 states have internal predecessors, (168), 6 states have call successors, (102), 4 states have call predecessors, (102), 8 states have return successors, (102), 6 states have call predecessors, (102), 6 states have call successors, (102) [2023-11-26 12:02:27,829 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 574 transitions. [2023-11-26 12:02:27,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2023-11-26 12:02:27,837 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:02:27,837 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:02:27,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-26 12:02:28,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:28,045 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:02:28,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:28,046 INFO L85 PathProgramCache]: Analyzing trace with hash -416700070, now seen corresponding path program 1 times [2023-11-26 12:02:28,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:28,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321194080] [2023-11-26 12:02:28,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:28,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:28,104 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:02:28,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [282142766] [2023-11-26 12:02:28,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:28,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:28,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:28,106 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:02:28,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-26 12:02:28,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:28,445 INFO L262 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-26 12:02:28,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:02:29,659 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-26 12:02:29,659 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:02:29,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:29,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321194080] [2023-11-26 12:02:29,659 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:02:29,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282142766] [2023-11-26 12:02:29,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282142766] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:02:29,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:02:29,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-26 12:02:29,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520047984] [2023-11-26 12:02:29,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:02:29,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-26 12:02:29,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:29,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-26 12:02:29,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-26 12:02:29,663 INFO L87 Difference]: Start difference. First operand 371 states and 574 transitions. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:02:30,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:02:30,043 INFO L93 Difference]: Finished difference Result 953 states and 1468 transitions. [2023-11-26 12:02:30,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-26 12:02:30,044 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 332 [2023-11-26 12:02:30,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:02:30,050 INFO L225 Difference]: With dead ends: 953 [2023-11-26 12:02:30,050 INFO L226 Difference]: Without dead ends: 583 [2023-11-26 12:02:30,052 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 329 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-26 12:02:30,053 INFO L413 NwaCegarLoop]: 239 mSDtfsCounter, 164 mSDsluCounter, 466 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 705 SdHoareTripleChecker+Invalid, 129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-26 12:02:30,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 705 Invalid, 129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-26 12:02:30,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2023-11-26 12:02:30,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 571. [2023-11-26 12:02:30,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 405 states have (on average 1.4148148148148147) internal successors, (573), 405 states have internal predecessors, (573), 153 states have call successors, (153), 12 states have call predecessors, (153), 12 states have return successors, (153), 153 states have call predecessors, (153), 153 states have call successors, (153) [2023-11-26 12:02:30,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 879 transitions. [2023-11-26 12:02:30,155 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 879 transitions. Word has length 332 [2023-11-26 12:02:30,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:02:30,157 INFO L495 AbstractCegarLoop]: Abstraction has 571 states and 879 transitions. [2023-11-26 12:02:30,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 3 states have internal predecessors, (80), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:02:30,158 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 879 transitions. [2023-11-26 12:02:30,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2023-11-26 12:02:30,163 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:02:30,163 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:02:30,189 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-26 12:02:30,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:30,385 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:02:30,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:30,386 INFO L85 PathProgramCache]: Analyzing trace with hash 6946652, now seen corresponding path program 1 times [2023-11-26 12:02:30,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:30,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740919989] [2023-11-26 12:02:30,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:30,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:30,444 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:02:30,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1677379691] [2023-11-26 12:02:30,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:30,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:30,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:30,446 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:02:30,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-26 12:02:30,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:30,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 12:02:30,842 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:02:32,224 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-26 12:02:32,225 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:02:32,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:32,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740919989] [2023-11-26 12:02:32,225 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:02:32,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677379691] [2023-11-26 12:02:32,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677379691] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:02:32,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:02:32,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 12:02:32,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021771017] [2023-11-26 12:02:32,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:02:32,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 12:02:32,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:32,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 12:02:32,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:02:32,230 INFO L87 Difference]: Start difference. First operand 571 states and 879 transitions. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:02:33,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:02:33,053 INFO L93 Difference]: Finished difference Result 1638 states and 2513 transitions. [2023-11-26 12:02:33,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 12:02:33,054 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 332 [2023-11-26 12:02:33,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:02:33,066 INFO L225 Difference]: With dead ends: 1638 [2023-11-26 12:02:33,066 INFO L226 Difference]: Without dead ends: 1225 [2023-11-26 12:02:33,068 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 327 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2023-11-26 12:02:33,070 INFO L413 NwaCegarLoop]: 238 mSDtfsCounter, 362 mSDsluCounter, 523 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 761 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-26 12:02:33,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [362 Valid, 761 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-26 12:02:33,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1225 states. [2023-11-26 12:02:33,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1225 to 1066. [2023-11-26 12:02:33,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1066 states, 789 states have (on average 1.4220532319391634) internal successors, (1122), 789 states have internal predecessors, (1122), 255 states have call successors, (255), 21 states have call predecessors, (255), 21 states have return successors, (255), 255 states have call predecessors, (255), 255 states have call successors, (255) [2023-11-26 12:02:33,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1066 states to 1066 states and 1632 transitions. [2023-11-26 12:02:33,235 INFO L78 Accepts]: Start accepts. Automaton has 1066 states and 1632 transitions. Word has length 332 [2023-11-26 12:02:33,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:02:33,236 INFO L495 AbstractCegarLoop]: Abstraction has 1066 states and 1632 transitions. [2023-11-26 12:02:33,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 5 states have internal predecessors, (80), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:02:33,237 INFO L276 IsEmpty]: Start isEmpty. Operand 1066 states and 1632 transitions. [2023-11-26 12:02:33,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 333 [2023-11-26 12:02:33,240 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:02:33,240 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:02:33,256 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-26 12:02:33,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:33,449 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:02:33,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:33,450 INFO L85 PathProgramCache]: Analyzing trace with hash 429648478, now seen corresponding path program 1 times [2023-11-26 12:02:33,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:33,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511875803] [2023-11-26 12:02:33,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:33,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:33,509 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:02:33,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1620499036] [2023-11-26 12:02:33,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:33,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:33,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:33,511 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:02:33,536 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-26 12:02:33,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:33,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 811 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-26 12:02:34,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:02:36,406 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 2379 proven. 96 refuted. 0 times theorem prover too weak. 2625 trivial. 0 not checked. [2023-11-26 12:02:36,407 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:02:38,017 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 99 proven. 51 refuted. 0 times theorem prover too weak. 4950 trivial. 0 not checked. [2023-11-26 12:02:38,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:38,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511875803] [2023-11-26 12:02:38,018 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:02:38,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620499036] [2023-11-26 12:02:38,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620499036] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-26 12:02:38,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-26 12:02:38,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 21 [2023-11-26 12:02:38,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996593213] [2023-11-26 12:02:38,019 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-26 12:02:38,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-26 12:02:38,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:38,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-26 12:02:38,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2023-11-26 12:02:38,022 INFO L87 Difference]: Start difference. First operand 1066 states and 1632 transitions. Second operand has 21 states, 21 states have (on average 7.857142857142857) internal successors, (165), 20 states have internal predecessors, (165), 5 states have call successors, (102), 4 states have call predecessors, (102), 6 states have return successors, (102), 5 states have call predecessors, (102), 5 states have call successors, (102) [2023-11-26 12:02:43,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:02:43,524 INFO L93 Difference]: Finished difference Result 4870 states and 7319 transitions. [2023-11-26 12:02:43,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-26 12:02:43,525 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 7.857142857142857) internal successors, (165), 20 states have internal predecessors, (165), 5 states have call successors, (102), 4 states have call predecessors, (102), 6 states have return successors, (102), 5 states have call predecessors, (102), 5 states have call successors, (102) Word has length 332 [2023-11-26 12:02:43,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:02:43,554 INFO L225 Difference]: With dead ends: 4870 [2023-11-26 12:02:43,555 INFO L226 Difference]: Without dead ends: 4078 [2023-11-26 12:02:43,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 707 GetRequests, 649 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1057 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=890, Invalid=2650, Unknown=0, NotChecked=0, Total=3540 [2023-11-26 12:02:43,561 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 1953 mSDsluCounter, 1860 mSDsCounter, 0 mSdLazyCounter, 1996 mSolverCounterSat, 681 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1957 SdHoareTripleChecker+Valid, 2058 SdHoareTripleChecker+Invalid, 2677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 681 IncrementalHoareTripleChecker+Valid, 1996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-26 12:02:43,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1957 Valid, 2058 Invalid, 2677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [681 Valid, 1996 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-26 12:02:43,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4078 states. [2023-11-26 12:02:44,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4078 to 3584. [2023-11-26 12:02:44,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3584 states, 2756 states have (on average 1.4129172714078375) internal successors, (3894), 2768 states have internal predecessors, (3894), 739 states have call successors, (739), 88 states have call predecessors, (739), 88 states have return successors, (739), 727 states have call predecessors, (739), 739 states have call successors, (739) [2023-11-26 12:02:44,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 5372 transitions. [2023-11-26 12:02:44,181 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 5372 transitions. Word has length 332 [2023-11-26 12:02:44,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:02:44,182 INFO L495 AbstractCegarLoop]: Abstraction has 3584 states and 5372 transitions. [2023-11-26 12:02:44,183 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 7.857142857142857) internal successors, (165), 20 states have internal predecessors, (165), 5 states have call successors, (102), 4 states have call predecessors, (102), 6 states have return successors, (102), 5 states have call predecessors, (102), 5 states have call successors, (102) [2023-11-26 12:02:44,183 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 5372 transitions. [2023-11-26 12:02:44,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2023-11-26 12:02:44,187 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:02:44,187 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:02:44,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-26 12:02:44,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:44,397 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:02:44,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:44,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1044448977, now seen corresponding path program 1 times [2023-11-26 12:02:44,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:44,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991020538] [2023-11-26 12:02:44,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:44,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:44,450 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:02:44,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1449174588] [2023-11-26 12:02:44,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:44,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:44,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:44,452 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:02:44,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-26 12:02:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:44,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 816 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-26 12:02:44,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:02:46,070 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5100 trivial. 0 not checked. [2023-11-26 12:02:46,070 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-26 12:02:46,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:46,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991020538] [2023-11-26 12:02:46,071 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:02:46,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449174588] [2023-11-26 12:02:46,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449174588] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-26 12:02:46,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-26 12:02:46,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-26 12:02:46,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609915029] [2023-11-26 12:02:46,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-26 12:02:46,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-26 12:02:46,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:46,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-26 12:02:46,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-26 12:02:46,078 INFO L87 Difference]: Start difference. First operand 3584 states and 5372 transitions. Second operand has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:02:47,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:02:47,499 INFO L93 Difference]: Finished difference Result 7415 states and 11105 transitions. [2023-11-26 12:02:47,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-26 12:02:47,500 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) Word has length 333 [2023-11-26 12:02:47,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:02:47,551 INFO L225 Difference]: With dead ends: 7415 [2023-11-26 12:02:47,552 INFO L226 Difference]: Without dead ends: 6796 [2023-11-26 12:02:47,556 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 328 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-26 12:02:47,559 INFO L413 NwaCegarLoop]: 236 mSDtfsCounter, 366 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 425 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 425 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-26 12:02:47,559 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 758 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 425 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-26 12:02:47,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6796 states. [2023-11-26 12:02:48,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6796 to 5926. [2023-11-26 12:02:48,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5926 states, 4609 states have (on average 1.4154914298112389) internal successors, (6524), 4625 states have internal predecessors, (6524), 1177 states have call successors, (1177), 139 states have call predecessors, (1177), 139 states have return successors, (1177), 1161 states have call predecessors, (1177), 1177 states have call successors, (1177) [2023-11-26 12:02:48,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5926 states to 5926 states and 8878 transitions. [2023-11-26 12:02:48,419 INFO L78 Accepts]: Start accepts. Automaton has 5926 states and 8878 transitions. Word has length 333 [2023-11-26 12:02:48,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-26 12:02:48,419 INFO L495 AbstractCegarLoop]: Abstraction has 5926 states and 8878 transitions. [2023-11-26 12:02:48,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.5) internal successors, (81), 5 states have internal predecessors, (81), 1 states have call successors, (51), 1 states have call predecessors, (51), 1 states have return successors, (51), 1 states have call predecessors, (51), 1 states have call successors, (51) [2023-11-26 12:02:48,420 INFO L276 IsEmpty]: Start isEmpty. Operand 5926 states and 8878 transitions. [2023-11-26 12:02:48,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2023-11-26 12:02:48,424 INFO L187 NwaCegarLoop]: Found error trace [2023-11-26 12:02:48,424 INFO L195 NwaCegarLoop]: trace histogram [51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-26 12:02:48,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-26 12:02:48,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:48,633 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-26 12:02:48,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-26 12:02:48,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1467150803, now seen corresponding path program 1 times [2023-11-26 12:02:48,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-26 12:02:48,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476589725] [2023-11-26 12:02:48,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:48,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-26 12:02:48,678 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-26 12:02:48,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1577344866] [2023-11-26 12:02:48,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-26 12:02:48,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-26 12:02:48,679 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 [2023-11-26 12:02:48,680 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-26 12:02:48,719 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6d9edb66-969c-46f3-bb87-1fa7fc53e381/bin/uautomizer-verify-VRDe98Ueme/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-26 12:02:49,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-26 12:02:49,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 814 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-26 12:02:49,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-26 12:02:51,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5100 backedges. 3056 proven. 303 refuted. 0 times theorem prover too weak. 1741 trivial. 0 not checked. [2023-11-26 12:02:51,385 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-26 12:02:52,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-26 12:02:52,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476589725] [2023-11-26 12:02:52,876 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-26 12:02:52,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577344866] [2023-11-26 12:02:52,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577344866] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-26 12:02:52,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-26 12:02:52,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2023-11-26 12:02:52,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341304330] [2023-11-26 12:02:52,878 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-26 12:02:52,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-26 12:02:52,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-26 12:02:52,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-26 12:02:52,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=542, Unknown=0, NotChecked=0, Total=702 [2023-11-26 12:02:52,881 INFO L87 Difference]: Start difference. First operand 5926 states and 8878 transitions. Second operand has 23 states, 23 states have (on average 4.695652173913044) internal successors, (108), 21 states have internal predecessors, (108), 7 states have call successors, (51), 7 states have call predecessors, (51), 10 states have return successors, (51), 7 states have call predecessors, (51), 7 states have call successors, (51) [2023-11-26 12:02:55,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-26 12:02:55,911 INFO L93 Difference]: Finished difference Result 8710 states and 12667 transitions. [2023-11-26 12:02:55,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-26 12:02:55,912 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.695652173913044) internal successors, (108), 21 states have internal predecessors, (108), 7 states have call successors, (51), 7 states have call predecessors, (51), 10 states have return successors, (51), 7 states have call predecessors, (51), 7 states have call successors, (51) Word has length 333 [2023-11-26 12:02:55,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-26 12:02:55,955 INFO L225 Difference]: With dead ends: 8710 [2023-11-26 12:02:55,955 INFO L226 Difference]: Without dead ends: 7550 [2023-11-26 12:02:55,961 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 360 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=426, Invalid=1296, Unknown=0, NotChecked=0, Total=1722 [2023-11-26 12:02:55,962 INFO L413 NwaCegarLoop]: 234 mSDtfsCounter, 419 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 1411 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 1558 SdHoareTripleChecker+Invalid, 1463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 1411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-26 12:02:55,962 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [423 Valid, 1558 Invalid, 1463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 1411 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-26 12:02:55,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7550 states.