./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-29.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_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-29.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b582e34b3a12ea058d8fdede8c5fe9e08faea5af2c4c7b390003b46348eed98b --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 06:26:34,922 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 06:26:34,984 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 06:26:34,988 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 06:26:34,988 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 06:26:35,011 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 06:26:35,012 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 06:26:35,012 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 06:26:35,013 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 06:26:35,014 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 06:26:35,014 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 06:26:35,015 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 06:26:35,015 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 06:26:35,016 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 06:26:35,016 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 06:26:35,017 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 06:26:35,017 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 06:26:35,018 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 06:26:35,018 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 06:26:35,019 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 06:26:35,019 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 06:26:35,022 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 06:26:35,023 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 06:26:35,023 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 06:26:35,024 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 06:26:35,024 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 06:26:35,024 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 06:26:35,025 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 06:26:35,025 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 06:26:35,025 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 06:26:35,026 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 06:26:35,026 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:26:35,027 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 06:26:35,027 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 06:26:35,027 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 06:26:35,027 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 06:26:35,027 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 06:26:35,028 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 06:26:35,028 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 06:26:35,028 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 06:26:35,028 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 06:26:35,029 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 06:26:35,029 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_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b582e34b3a12ea058d8fdede8c5fe9e08faea5af2c4c7b390003b46348eed98b [2023-11-29 06:26:35,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 06:26:35,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 06:26:35,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 06:26:35,300 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 06:26:35,301 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 06:26:35,302 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-29.i [2023-11-29 06:26:37,959 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 06:26:38,236 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 06:26:38,237 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-29.i [2023-11-29 06:26:38,252 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/data/33ad6bff9/730498fc1ce44e2fa1e3bcb65316df06/FLAG8ed947c00 [2023-11-29 06:26:38,266 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/data/33ad6bff9/730498fc1ce44e2fa1e3bcb65316df06 [2023-11-29 06:26:38,269 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 06:26:38,270 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 06:26:38,271 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 06:26:38,271 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 06:26:38,276 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 06:26:38,277 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:26:38" (1/1) ... [2023-11-29 06:26:38,278 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@10538699 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:38, skipping insertion in model container [2023-11-29 06:26:38,278 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 06:26:38" (1/1) ... [2023-11-29 06:26:38,338 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 06:26:38,487 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_7c5ca6d5-ad75-4831-800a-8fc62885f037/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-29.i[916,929] [2023-11-29 06:26:38,708 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:26:38,728 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 06:26:38,741 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_7c5ca6d5-ad75-4831-800a-8fc62885f037/sv-benchmarks/c/hardness-nfm22/hardness_operatoramount_amount500_file-29.i[916,929] [2023-11-29 06:26:38,864 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 06:26:38,884 INFO L206 MainTranslator]: Completed translation [2023-11-29 06:26:38,884 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:38 WrapperNode [2023-11-29 06:26:38,884 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 06:26:38,885 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 06:26:38,886 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 06:26:38,886 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 06:26:38,893 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:38" (1/1) ... [2023-11-29 06:26:38,919 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:38" (1/1) ... [2023-11-29 06:26:39,057 INFO L138 Inliner]: procedures = 26, calls = 98, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 753 [2023-11-29 06:26:39,057 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 06:26:39,058 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 06:26:39,058 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 06:26:39,058 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 06:26:39,069 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:38" (1/1) ... [2023-11-29 06:26:39,070 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:38" (1/1) ... [2023-11-29 06:26:39,092 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:38" (1/1) ... [2023-11-29 06:26:39,152 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-29 06:26:39,153 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:38" (1/1) ... [2023-11-29 06:26:39,153 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:38" (1/1) ... [2023-11-29 06:26:39,188 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:38" (1/1) ... [2023-11-29 06:26:39,195 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:38" (1/1) ... [2023-11-29 06:26:39,206 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:38" (1/1) ... [2023-11-29 06:26:39,213 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:38" (1/1) ... [2023-11-29 06:26:39,226 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 06:26:39,227 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 06:26:39,227 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 06:26:39,227 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 06:26:39,228 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:38" (1/1) ... [2023-11-29 06:26:39,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 06:26:39,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:39,256 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 06:26:39,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 06:26:39,286 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 06:26:39,286 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 06:26:39,287 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 06:26:39,287 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 06:26:39,287 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 06:26:39,287 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 06:26:39,430 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 06:26:39,432 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 06:26:40,414 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 06:26:40,472 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 06:26:40,473 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 06:26:40,473 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:26:40 BoogieIcfgContainer [2023-11-29 06:26:40,474 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 06:26:40,476 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 06:26:40,476 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 06:26:40,479 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 06:26:40,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 06:26:38" (1/3) ... [2023-11-29 06:26:40,480 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@635dd918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:26:40, skipping insertion in model container [2023-11-29 06:26:40,480 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 06:26:38" (2/3) ... [2023-11-29 06:26:40,481 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@635dd918 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 06:26:40, skipping insertion in model container [2023-11-29 06:26:40,481 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 06:26:40" (3/3) ... [2023-11-29 06:26:40,482 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_operatoramount_amount500_file-29.i [2023-11-29 06:26:40,501 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 06:26:40,501 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 06:26:40,557 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 06:26:40,563 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;@2cebfbeb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 06:26:40,564 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 06:26:40,570 INFO L276 IsEmpty]: Start isEmpty. Operand has 287 states, 199 states have (on average 1.5678391959798994) internal successors, (312), 200 states have internal predecessors, (312), 85 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2023-11-29 06:26:40,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2023-11-29 06:26:40,602 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:26:40,603 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:40,603 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:26:40,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:40,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1631485028, now seen corresponding path program 1 times [2023-11-29 06:26:40,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:40,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580202019] [2023-11-29 06:26:40,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:40,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:40,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:26:40,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580202019] [2023-11-29 06:26:40,997 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unsupported non-linear arithmetic [2023-11-29 06:26:40,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073315190] [2023-11-29 06:26:40,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:40,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:40,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:41,002 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:26:41,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 06:26:41,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:41,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 1412 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-29 06:26:41,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:26:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 168 proven. 0 refuted. 0 times theorem prover too weak. 14112 trivial. 0 not checked. [2023-11-29 06:26:41,553 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:26:41,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073315190] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:26:41,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:26:41,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 06:26:41,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582824736] [2023-11-29 06:26:41,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:26:41,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-29 06:26:41,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:26:41,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-29 06:26:41,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:26:41,592 INFO L87 Difference]: Start difference. First operand has 287 states, 199 states have (on average 1.5678391959798994) internal successors, (312), 200 states have internal predecessors, (312), 85 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) Second operand has 2 states, 2 states have (on average 72.0) internal successors, (144), 2 states have internal predecessors, (144), 2 states have call successors, (85), 2 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 2 states have call successors, (85) [2023-11-29 06:26:41,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:26:41,672 INFO L93 Difference]: Finished difference Result 571 states and 1047 transitions. [2023-11-29 06:26:41,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-29 06:26:41,675 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 72.0) internal successors, (144), 2 states have internal predecessors, (144), 2 states have call successors, (85), 2 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 2 states have call successors, (85) Word has length 564 [2023-11-29 06:26:41,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:26:41,686 INFO L225 Difference]: With dead ends: 571 [2023-11-29 06:26:41,686 INFO L226 Difference]: Without dead ends: 285 [2023-11-29 06:26:41,693 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 563 GetRequests, 563 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-29 06:26:41,696 INFO L413 NwaCegarLoop]: 474 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, 474 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:26:41,697 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 474 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:26:41,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2023-11-29 06:26:41,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2023-11-29 06:26:41,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 198 states have (on average 1.5505050505050506) internal successors, (307), 198 states have internal predecessors, (307), 85 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 85 states have call predecessors, (85), 85 states have call successors, (85) [2023-11-29 06:26:41,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 477 transitions. [2023-11-29 06:26:41,767 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 477 transitions. Word has length 564 [2023-11-29 06:26:41,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:26:41,768 INFO L495 AbstractCegarLoop]: Abstraction has 285 states and 477 transitions. [2023-11-29 06:26:41,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 72.0) internal successors, (144), 2 states have internal predecessors, (144), 2 states have call successors, (85), 2 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 2 states have call successors, (85) [2023-11-29 06:26:41,769 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 477 transitions. [2023-11-29 06:26:41,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 565 [2023-11-29 06:26:41,801 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:26:41,801 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:41,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 06:26:42,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 06:26:42,003 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:26:42,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:42,004 INFO L85 PathProgramCache]: Analyzing trace with hash 1125930578, now seen corresponding path program 1 times [2023-11-29 06:26:42,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:42,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489687386] [2023-11-29 06:26:42,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:42,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:42,155 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:26:42,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1267848747] [2023-11-29 06:26:42,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:42,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:42,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:42,157 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:26:42,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 06:26:42,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:42,648 INFO L262 TraceCheckSpWp]: Trace formula consists of 1412 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 06:26:42,666 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:26:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-29 06:26:44,503 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:26:44,503 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:26:44,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489687386] [2023-11-29 06:26:44,503 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:26:44,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267848747] [2023-11-29 06:26:44,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267848747] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:26:44,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:26:44,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:26:44,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846229241] [2023-11-29 06:26:44,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:26:44,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:26:44,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:26:44,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:26:44,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:26:44,509 INFO L87 Difference]: Start difference. First operand 285 states and 477 transitions. Second operand has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:26:44,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:26:44,958 INFO L93 Difference]: Finished difference Result 854 states and 1430 transitions. [2023-11-29 06:26:44,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:26:44,959 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 564 [2023-11-29 06:26:44,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:26:44,966 INFO L225 Difference]: With dead ends: 854 [2023-11-29 06:26:44,966 INFO L226 Difference]: Without dead ends: 570 [2023-11-29 06:26:44,967 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 561 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:26:44,969 INFO L413 NwaCegarLoop]: 472 mSDtfsCounter, 358 mSDsluCounter, 931 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:26:44,969 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 1403 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:26:44,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2023-11-29 06:26:45,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 459. [2023-11-29 06:26:45,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 286 states have (on average 1.4755244755244756) internal successors, (422), 286 states have internal predecessors, (422), 170 states have call successors, (170), 2 states have call predecessors, (170), 2 states have return successors, (170), 170 states have call predecessors, (170), 170 states have call successors, (170) [2023-11-29 06:26:45,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 762 transitions. [2023-11-29 06:26:45,075 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 762 transitions. Word has length 564 [2023-11-29 06:26:45,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:26:45,077 INFO L495 AbstractCegarLoop]: Abstraction has 459 states and 762 transitions. [2023-11-29 06:26:45,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.5) internal successors, (142), 3 states have internal predecessors, (142), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:26:45,078 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 762 transitions. [2023-11-29 06:26:45,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2023-11-29 06:26:45,094 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:26:45,094 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:45,103 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 06:26:45,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:45,295 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:26:45,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:45,296 INFO L85 PathProgramCache]: Analyzing trace with hash 1683243648, now seen corresponding path program 1 times [2023-11-29 06:26:45,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:45,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902183620] [2023-11-29 06:26:45,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:45,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:45,389 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:26:45,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [392604198] [2023-11-29 06:26:45,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:45,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:45,390 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:45,391 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:26:45,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 06:26:45,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:45,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 1412 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:26:45,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:26:45,882 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-29 06:26:45,882 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:26:45,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:26:45,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902183620] [2023-11-29 06:26:45,882 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:26:45,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392604198] [2023-11-29 06:26:45,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392604198] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:26:45,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:26:45,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:26:45,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672208582] [2023-11-29 06:26:45,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:26:45,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:26:45,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:26:45,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:26:45,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:26:45,886 INFO L87 Difference]: Start difference. First operand 459 states and 762 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:26:46,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:26:46,129 INFO L93 Difference]: Finished difference Result 1249 states and 2084 transitions. [2023-11-29 06:26:46,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:26:46,130 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 565 [2023-11-29 06:26:46,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:26:46,140 INFO L225 Difference]: With dead ends: 1249 [2023-11-29 06:26:46,140 INFO L226 Difference]: Without dead ends: 965 [2023-11-29 06:26:46,141 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 563 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:26:46,142 INFO L413 NwaCegarLoop]: 816 mSDtfsCounter, 920 mSDsluCounter, 1380 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 920 SdHoareTripleChecker+Valid, 2196 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:26:46,143 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [920 Valid, 2196 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:26:46,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 965 states. [2023-11-29 06:26:46,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 965 to 957. [2023-11-29 06:26:46,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 684 states have (on average 1.5570175438596492) internal successors, (1065), 686 states have internal predecessors, (1065), 267 states have call successors, (267), 5 states have call predecessors, (267), 5 states have return successors, (267), 265 states have call predecessors, (267), 267 states have call successors, (267) [2023-11-29 06:26:46,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1599 transitions. [2023-11-29 06:26:46,305 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1599 transitions. Word has length 565 [2023-11-29 06:26:46,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:26:46,307 INFO L495 AbstractCegarLoop]: Abstraction has 957 states and 1599 transitions. [2023-11-29 06:26:46,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:26:46,307 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1599 transitions. [2023-11-29 06:26:46,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 566 [2023-11-29 06:26:46,313 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:26:46,314 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:46,322 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 06:26:46,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:46,514 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:26:46,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:46,515 INFO L85 PathProgramCache]: Analyzing trace with hash -560739650, now seen corresponding path program 1 times [2023-11-29 06:26:46,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:46,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732635001] [2023-11-29 06:26:46,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:46,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:46,584 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:26:46,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2145571679] [2023-11-29 06:26:46,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:46,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:46,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:46,585 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:26:46,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 06:26:46,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:46,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:26:46,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:26:47,043 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-29 06:26:47,044 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:26:47,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:26:47,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732635001] [2023-11-29 06:26:47,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:26:47,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145571679] [2023-11-29 06:26:47,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145571679] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:26:47,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:26:47,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:26:47,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131014592] [2023-11-29 06:26:47,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:26:47,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:26:47,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:26:47,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:26:47,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:26:47,059 INFO L87 Difference]: Start difference. First operand 957 states and 1599 transitions. Second operand has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:26:47,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:26:47,232 INFO L93 Difference]: Finished difference Result 2159 states and 3608 transitions. [2023-11-29 06:26:47,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:26:47,232 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 565 [2023-11-29 06:26:47,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:26:47,244 INFO L225 Difference]: With dead ends: 2159 [2023-11-29 06:26:47,245 INFO L226 Difference]: Without dead ends: 1377 [2023-11-29 06:26:47,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 565 GetRequests, 562 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:26:47,248 INFO L413 NwaCegarLoop]: 632 mSDtfsCounter, 366 mSDsluCounter, 987 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 1619 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:26:47,249 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [366 Valid, 1619 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:26:47,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1377 states. [2023-11-29 06:26:47,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1377 to 1291. [2023-11-29 06:26:47,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1291 states, 1006 states have (on average 1.5825049701789264) internal successors, (1592), 1012 states have internal predecessors, (1592), 275 states have call successors, (275), 9 states have call predecessors, (275), 9 states have return successors, (275), 269 states have call predecessors, (275), 275 states have call successors, (275) [2023-11-29 06:26:47,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1291 states to 1291 states and 2142 transitions. [2023-11-29 06:26:47,405 INFO L78 Accepts]: Start accepts. Automaton has 1291 states and 2142 transitions. Word has length 565 [2023-11-29 06:26:47,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:26:47,407 INFO L495 AbstractCegarLoop]: Abstraction has 1291 states and 2142 transitions. [2023-11-29 06:26:47,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 35.75) internal successors, (143), 4 states have internal predecessors, (143), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:26:47,407 INFO L276 IsEmpty]: Start isEmpty. Operand 1291 states and 2142 transitions. [2023-11-29 06:26:47,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2023-11-29 06:26:47,413 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:26:47,414 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:47,423 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 06:26:47,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:47,615 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:26:47,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:47,615 INFO L85 PathProgramCache]: Analyzing trace with hash 2140024936, now seen corresponding path program 1 times [2023-11-29 06:26:47,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:47,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105235137] [2023-11-29 06:26:47,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:47,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:47,692 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:26:47,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [457734908] [2023-11-29 06:26:47,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:47,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:47,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:47,694 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:26:47,694 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 06:26:48,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:48,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:26:48,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:26:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-29 06:26:48,177 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:26:48,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:26:48,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105235137] [2023-11-29 06:26:48,178 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:26:48,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457734908] [2023-11-29 06:26:48,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457734908] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:26:48,178 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:26:48,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:26:48,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038744676] [2023-11-29 06:26:48,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:26:48,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:26:48,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:26:48,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:26:48,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:26:48,182 INFO L87 Difference]: Start difference. First operand 1291 states and 2142 transitions. Second operand has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:26:48,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:26:48,423 INFO L93 Difference]: Finished difference Result 3269 states and 5422 transitions. [2023-11-29 06:26:48,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:26:48,424 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 566 [2023-11-29 06:26:48,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:26:48,435 INFO L225 Difference]: With dead ends: 3269 [2023-11-29 06:26:48,435 INFO L226 Difference]: Without dead ends: 2157 [2023-11-29 06:26:48,438 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 563 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:26:48,439 INFO L413 NwaCegarLoop]: 458 mSDtfsCounter, 239 mSDsluCounter, 934 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 239 SdHoareTripleChecker+Valid, 1392 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:26:48,439 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [239 Valid, 1392 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:26:48,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2157 states. [2023-11-29 06:26:48,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2157 to 2099. [2023-11-29 06:26:48,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2099 states, 1781 states have (on average 1.6165075800112296) internal successors, (2879), 1795 states have internal predecessors, (2879), 299 states have call successors, (299), 18 states have call predecessors, (299), 18 states have return successors, (299), 285 states have call predecessors, (299), 299 states have call successors, (299) [2023-11-29 06:26:48,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2099 states to 2099 states and 3477 transitions. [2023-11-29 06:26:48,559 INFO L78 Accepts]: Start accepts. Automaton has 2099 states and 3477 transitions. Word has length 566 [2023-11-29 06:26:48,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:26:48,560 INFO L495 AbstractCegarLoop]: Abstraction has 2099 states and 3477 transitions. [2023-11-29 06:26:48,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.0) internal successors, (144), 4 states have internal predecessors, (144), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:26:48,560 INFO L276 IsEmpty]: Start isEmpty. Operand 2099 states and 3477 transitions. [2023-11-29 06:26:48,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 567 [2023-11-29 06:26:48,565 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:26:48,565 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:48,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 06:26:48,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:48,766 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:26:48,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:48,767 INFO L85 PathProgramCache]: Analyzing trace with hash 305250696, now seen corresponding path program 1 times [2023-11-29 06:26:48,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:48,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214623896] [2023-11-29 06:26:48,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:48,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:48,852 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:26:48,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [42853410] [2023-11-29 06:26:48,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:48,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:48,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:48,854 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:26:48,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 06:26:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:49,303 INFO L262 TraceCheckSpWp]: Trace formula consists of 1412 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:26:49,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:26:49,900 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 1968 proven. 234 refuted. 0 times theorem prover too weak. 12078 trivial. 0 not checked. [2023-11-29 06:26:49,901 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:26:50,392 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 18 proven. 234 refuted. 0 times theorem prover too weak. 14028 trivial. 0 not checked. [2023-11-29 06:26:50,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:26:50,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214623896] [2023-11-29 06:26:50,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:26:50,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42853410] [2023-11-29 06:26:50,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42853410] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:26:50,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:26:50,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 06:26:50,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273407657] [2023-11-29 06:26:50,394 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:26:50,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:26:50,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:26:50,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:26:50,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:26:50,398 INFO L87 Difference]: Start difference. First operand 2099 states and 3477 transitions. Second operand has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 2 states have call successors, (163), 2 states have call predecessors, (163), 4 states have return successors, (164), 2 states have call predecessors, (164), 2 states have call successors, (164) [2023-11-29 06:26:50,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:26:50,942 INFO L93 Difference]: Finished difference Result 3409 states and 5651 transitions. [2023-11-29 06:26:50,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 06:26:50,943 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 2 states have call successors, (163), 2 states have call predecessors, (163), 4 states have return successors, (164), 2 states have call predecessors, (164), 2 states have call successors, (164) Word has length 566 [2023-11-29 06:26:50,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:26:50,955 INFO L225 Difference]: With dead ends: 3409 [2023-11-29 06:26:50,955 INFO L226 Difference]: Without dead ends: 1505 [2023-11-29 06:26:50,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1134 GetRequests, 1124 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:26:50,960 INFO L413 NwaCegarLoop]: 370 mSDtfsCounter, 449 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 935 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:26:50,960 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [455 Valid, 935 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:26:50,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1505 states. [2023-11-29 06:26:51,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1505 to 1493. [2023-11-29 06:26:51,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1493 states, 1208 states have (on average 1.5877483443708609) internal successors, (1918), 1214 states have internal predecessors, (1918), 271 states have call successors, (271), 13 states have call predecessors, (271), 13 states have return successors, (271), 265 states have call predecessors, (271), 271 states have call successors, (271) [2023-11-29 06:26:51,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2460 transitions. [2023-11-29 06:26:51,120 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2460 transitions. Word has length 566 [2023-11-29 06:26:51,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:26:51,121 INFO L495 AbstractCegarLoop]: Abstraction has 1493 states and 2460 transitions. [2023-11-29 06:26:51,122 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.857142857142858) internal successors, (153), 7 states have internal predecessors, (153), 2 states have call successors, (163), 2 states have call predecessors, (163), 4 states have return successors, (164), 2 states have call predecessors, (164), 2 states have call successors, (164) [2023-11-29 06:26:51,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2460 transitions. [2023-11-29 06:26:51,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2023-11-29 06:26:51,127 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:26:51,128 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:51,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 06:26:51,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:51,329 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:26:51,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:51,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1872002200, now seen corresponding path program 1 times [2023-11-29 06:26:51,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:51,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73189093] [2023-11-29 06:26:51,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:51,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:51,413 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:26:51,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1317022218] [2023-11-29 06:26:51,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:51,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:51,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:51,415 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:26:51,417 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 06:26:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:51,850 INFO L262 TraceCheckSpWp]: Trace formula consists of 1412 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:26:51,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:26:51,890 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-29 06:26:51,890 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:26:51,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:26:51,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73189093] [2023-11-29 06:26:51,891 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:26:51,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317022218] [2023-11-29 06:26:51,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317022218] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:26:51,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:26:51,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:26:51,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674410235] [2023-11-29 06:26:51,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:26:51,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:26:51,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:26:51,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:26:51,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:26:51,921 INFO L87 Difference]: Start difference. First operand 1493 states and 2460 transitions. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:26:52,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:26:52,026 INFO L93 Difference]: Finished difference Result 2787 states and 4603 transitions. [2023-11-29 06:26:52,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:26:52,027 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 567 [2023-11-29 06:26:52,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:26:52,038 INFO L225 Difference]: With dead ends: 2787 [2023-11-29 06:26:52,038 INFO L226 Difference]: Without dead ends: 1493 [2023-11-29 06:26:52,041 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 565 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:26:52,042 INFO L413 NwaCegarLoop]: 462 mSDtfsCounter, 460 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 460 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:26:52,042 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [460 Valid, 462 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:26:52,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2023-11-29 06:26:52,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1493. [2023-11-29 06:26:52,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1493 states, 1208 states have (on average 1.5745033112582782) internal successors, (1902), 1214 states have internal predecessors, (1902), 271 states have call successors, (271), 13 states have call predecessors, (271), 13 states have return successors, (271), 265 states have call predecessors, (271), 271 states have call successors, (271) [2023-11-29 06:26:52,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1493 states to 1493 states and 2444 transitions. [2023-11-29 06:26:52,210 INFO L78 Accepts]: Start accepts. Automaton has 1493 states and 2444 transitions. Word has length 567 [2023-11-29 06:26:52,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:26:52,211 INFO L495 AbstractCegarLoop]: Abstraction has 1493 states and 2444 transitions. [2023-11-29 06:26:52,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:26:52,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1493 states and 2444 transitions. [2023-11-29 06:26:52,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2023-11-29 06:26:52,218 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:26:52,218 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:52,227 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 06:26:52,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:52,419 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:26:52,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:52,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1311302422, now seen corresponding path program 1 times [2023-11-29 06:26:52,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:52,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069011505] [2023-11-29 06:26:52,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:52,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:52,486 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:26:52,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1990318188] [2023-11-29 06:26:52,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:52,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:52,487 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:52,488 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:26:52,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 06:26:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:52,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 1412 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:26:52,935 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:26:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-29 06:26:53,030 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:26:53,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:26:53,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069011505] [2023-11-29 06:26:53,031 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:26:53,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990318188] [2023-11-29 06:26:53,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990318188] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:26:53,031 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:26:53,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:26:53,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846787638] [2023-11-29 06:26:53,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:26:53,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:26:53,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:26:53,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:26:53,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:26:53,034 INFO L87 Difference]: Start difference. First operand 1493 states and 2444 transitions. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:26:53,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:26:53,366 INFO L93 Difference]: Finished difference Result 3585 states and 5859 transitions. [2023-11-29 06:26:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 06:26:53,367 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 567 [2023-11-29 06:26:53,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:26:53,382 INFO L225 Difference]: With dead ends: 3585 [2023-11-29 06:26:53,382 INFO L226 Difference]: Without dead ends: 2283 [2023-11-29 06:26:53,386 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 566 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:26:53,387 INFO L413 NwaCegarLoop]: 800 mSDtfsCounter, 1178 mSDsluCounter, 1971 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1178 SdHoareTripleChecker+Valid, 2771 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:26:53,387 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1178 Valid, 2771 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:26:53,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2283 states. [2023-11-29 06:26:53,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2283 to 1841. [2023-11-29 06:26:53,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1841 states, 1553 states have (on average 1.6091435930457179) internal successors, (2499), 1559 states have internal predecessors, (2499), 271 states have call successors, (271), 16 states have call predecessors, (271), 16 states have return successors, (271), 265 states have call predecessors, (271), 271 states have call successors, (271) [2023-11-29 06:26:53,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1841 states to 1841 states and 3041 transitions. [2023-11-29 06:26:53,577 INFO L78 Accepts]: Start accepts. Automaton has 1841 states and 3041 transitions. Word has length 567 [2023-11-29 06:26:53,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:26:53,578 INFO L495 AbstractCegarLoop]: Abstraction has 1841 states and 3041 transitions. [2023-11-29 06:26:53,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:26:53,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1841 states and 3041 transitions. [2023-11-29 06:26:53,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2023-11-29 06:26:53,585 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:26:53,585 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:53,594 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 06:26:53,786 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:53,786 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:26:53,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:53,787 INFO L85 PathProgramCache]: Analyzing trace with hash 739681576, now seen corresponding path program 1 times [2023-11-29 06:26:53,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:53,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864848734] [2023-11-29 06:26:53,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:53,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:53,866 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:26:53,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1436655629] [2023-11-29 06:26:53,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:53,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:53,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:53,868 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:26:53,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 06:26:54,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:54,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 06:26:54,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:26:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-29 06:26:54,473 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:26:54,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:26:54,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864848734] [2023-11-29 06:26:54,473 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:26:54,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1436655629] [2023-11-29 06:26:54,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1436655629] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:26:54,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:26:54,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 06:26:54,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902674686] [2023-11-29 06:26:54,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:26:54,475 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:26:54,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:26:54,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:26:54,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:26:54,477 INFO L87 Difference]: Start difference. First operand 1841 states and 3041 transitions. Second operand has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:26:54,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:26:54,746 INFO L93 Difference]: Finished difference Result 4936 states and 8175 transitions. [2023-11-29 06:26:54,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:26:54,747 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 567 [2023-11-29 06:26:54,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:26:54,769 INFO L225 Difference]: With dead ends: 4936 [2023-11-29 06:26:54,769 INFO L226 Difference]: Without dead ends: 3298 [2023-11-29 06:26:54,773 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 567 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:26:54,773 INFO L413 NwaCegarLoop]: 554 mSDtfsCounter, 578 mSDsluCounter, 764 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 1318 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:26:54,774 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [578 Valid, 1318 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:26:54,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3298 states. [2023-11-29 06:26:54,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3298 to 3294. [2023-11-29 06:26:54,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3294 states, 2906 states have (on average 1.6231933929800413) internal successors, (4717), 2920 states have internal predecessors, (4717), 359 states have call successors, (359), 28 states have call predecessors, (359), 28 states have return successors, (359), 345 states have call predecessors, (359), 359 states have call successors, (359) [2023-11-29 06:26:54,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3294 states to 3294 states and 5435 transitions. [2023-11-29 06:26:54,994 INFO L78 Accepts]: Start accepts. Automaton has 3294 states and 5435 transitions. Word has length 567 [2023-11-29 06:26:54,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:26:54,994 INFO L495 AbstractCegarLoop]: Abstraction has 3294 states and 5435 transitions. [2023-11-29 06:26:54,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 36.25) internal successors, (145), 4 states have internal predecessors, (145), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:26:54,995 INFO L276 IsEmpty]: Start isEmpty. Operand 3294 states and 5435 transitions. [2023-11-29 06:26:55,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2023-11-29 06:26:55,003 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:26:55,004 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:55,013 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 06:26:55,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:55,205 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:26:55,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:55,205 INFO L85 PathProgramCache]: Analyzing trace with hash -833288634, now seen corresponding path program 1 times [2023-11-29 06:26:55,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:55,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171306187] [2023-11-29 06:26:55,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:55,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:55,286 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:26:55,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [460750619] [2023-11-29 06:26:55,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:55,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:55,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:55,287 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:26:55,291 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 06:26:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:55,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 1413 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:26:55,723 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:26:56,233 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 1674 proven. 237 refuted. 0 times theorem prover too weak. 12369 trivial. 0 not checked. [2023-11-29 06:26:56,233 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:26:56,576 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 15 proven. 237 refuted. 0 times theorem prover too weak. 14028 trivial. 0 not checked. [2023-11-29 06:26:56,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:26:56,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171306187] [2023-11-29 06:26:56,577 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:26:56,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460750619] [2023-11-29 06:26:56,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460750619] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:26:56,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:26:56,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 06:26:56,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088208863] [2023-11-29 06:26:56,578 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:26:56,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:26:56,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:26:56,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:26:56,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:26:56,581 INFO L87 Difference]: Start difference. First operand 3294 states and 5435 transitions. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 2 states have call successors, (164), 2 states have call predecessors, (164), 4 states have return successors, (165), 2 states have call predecessors, (165), 2 states have call successors, (165) [2023-11-29 06:26:57,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:26:57,072 INFO L93 Difference]: Finished difference Result 5098 states and 8368 transitions. [2023-11-29 06:26:57,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:26:57,074 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 2 states have call successors, (164), 2 states have call predecessors, (164), 4 states have return successors, (165), 2 states have call predecessors, (165), 2 states have call successors, (165) Word has length 567 [2023-11-29 06:26:57,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:26:57,087 INFO L225 Difference]: With dead ends: 5098 [2023-11-29 06:26:57,087 INFO L226 Difference]: Without dead ends: 2008 [2023-11-29 06:26:57,092 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1136 GetRequests, 1126 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:26:57,093 INFO L413 NwaCegarLoop]: 363 mSDtfsCounter, 470 mSDsluCounter, 553 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:26:57,093 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [474 Valid, 916 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:26:57,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2008 states. [2023-11-29 06:26:57,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2008 to 1978. [2023-11-29 06:26:57,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1978 states, 1618 states have (on average 1.5754017305315204) internal successors, (2549), 1624 states have internal predecessors, (2549), 335 states have call successors, (335), 24 states have call predecessors, (335), 24 states have return successors, (335), 329 states have call predecessors, (335), 335 states have call successors, (335) [2023-11-29 06:26:57,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1978 states to 1978 states and 3219 transitions. [2023-11-29 06:26:57,279 INFO L78 Accepts]: Start accepts. Automaton has 1978 states and 3219 transitions. Word has length 567 [2023-11-29 06:26:57,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:26:57,279 INFO L495 AbstractCegarLoop]: Abstraction has 1978 states and 3219 transitions. [2023-11-29 06:26:57,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 2 states have call successors, (164), 2 states have call predecessors, (164), 4 states have return successors, (165), 2 states have call predecessors, (165), 2 states have call successors, (165) [2023-11-29 06:26:57,280 INFO L276 IsEmpty]: Start isEmpty. Operand 1978 states and 3219 transitions. [2023-11-29 06:26:57,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 568 [2023-11-29 06:26:57,286 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:26:57,286 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:57,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 06:26:57,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 06:26:57,487 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:26:57,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:57,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1821181270, now seen corresponding path program 1 times [2023-11-29 06:26:57,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:57,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794536145] [2023-11-29 06:26:57,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:57,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:57,561 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:26:57,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [991123806] [2023-11-29 06:26:57,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:57,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:57,561 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:57,562 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:26:57,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 06:26:57,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:26:57,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 1411 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:26:57,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:26:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 1062 proven. 243 refuted. 0 times theorem prover too weak. 12975 trivial. 0 not checked. [2023-11-29 06:26:58,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:26:58,824 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 9 proven. 243 refuted. 0 times theorem prover too weak. 14028 trivial. 0 not checked. [2023-11-29 06:26:58,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:26:58,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794536145] [2023-11-29 06:26:58,825 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:26:58,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991123806] [2023-11-29 06:26:58,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991123806] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:26:58,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:26:58,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2023-11-29 06:26:58,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838947283] [2023-11-29 06:26:58,826 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:26:58,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:26:58,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:26:58,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:26:58,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:26:58,827 INFO L87 Difference]: Start difference. First operand 1978 states and 3219 transitions. Second operand has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 2 states have call successors, (166), 2 states have call predecessors, (166), 4 states have return successors, (167), 2 states have call predecessors, (167), 2 states have call successors, (167) [2023-11-29 06:26:59,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:26:59,248 INFO L93 Difference]: Finished difference Result 3162 states and 5103 transitions. [2023-11-29 06:26:59,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:26:59,249 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 2 states have call successors, (166), 2 states have call predecessors, (166), 4 states have return successors, (167), 2 states have call predecessors, (167), 2 states have call successors, (167) Word has length 567 [2023-11-29 06:26:59,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:26:59,256 INFO L225 Difference]: With dead ends: 3162 [2023-11-29 06:26:59,256 INFO L226 Difference]: Without dead ends: 1380 [2023-11-29 06:26:59,258 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1136 GetRequests, 1126 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:26:59,259 INFO L413 NwaCegarLoop]: 364 mSDtfsCounter, 454 mSDsluCounter, 555 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 919 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:26:59,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [456 Valid, 919 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:26:59,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2023-11-29 06:26:59,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1350. [2023-11-29 06:26:59,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 997 states have (on average 1.5025075225677031) internal successors, (1498), 999 states have internal predecessors, (1498), 327 states have call successors, (327), 25 states have call predecessors, (327), 25 states have return successors, (327), 325 states have call predecessors, (327), 327 states have call successors, (327) [2023-11-29 06:26:59,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2152 transitions. [2023-11-29 06:26:59,450 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2152 transitions. Word has length 567 [2023-11-29 06:26:59,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:26:59,451 INFO L495 AbstractCegarLoop]: Abstraction has 1350 states and 2152 transitions. [2023-11-29 06:26:59,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 2 states have call successors, (166), 2 states have call predecessors, (166), 4 states have return successors, (167), 2 states have call predecessors, (167), 2 states have call successors, (167) [2023-11-29 06:26:59,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2152 transitions. [2023-11-29 06:26:59,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2023-11-29 06:26:59,460 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:26:59,461 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:26:59,469 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 06:26:59,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 06:26:59,661 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:26:59,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:26:59,662 INFO L85 PathProgramCache]: Analyzing trace with hash -63134960, now seen corresponding path program 1 times [2023-11-29 06:26:59,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:26:59,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55729187] [2023-11-29 06:26:59,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:59,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:26:59,756 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:26:59,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2113795510] [2023-11-29 06:26:59,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:26:59,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:26:59,757 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:26:59,758 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:26:59,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 06:27:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:27:00,184 INFO L262 TraceCheckSpWp]: Trace formula consists of 1411 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 06:27:00,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:27:00,265 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-29 06:27:00,265 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:27:00,265 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:27:00,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55729187] [2023-11-29 06:27:00,265 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:27:00,265 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113795510] [2023-11-29 06:27:00,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113795510] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:27:00,266 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:27:00,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 06:27:00,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022146876] [2023-11-29 06:27:00,266 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:27:00,267 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 06:27:00,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:27:00,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 06:27:00,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 06:27:00,268 INFO L87 Difference]: Start difference. First operand 1350 states and 2152 transitions. Second operand has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:27:00,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:27:00,544 INFO L93 Difference]: Finished difference Result 2538 states and 4060 transitions. [2023-11-29 06:27:00,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:27:00,545 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 568 [2023-11-29 06:27:00,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:27:00,552 INFO L225 Difference]: With dead ends: 2538 [2023-11-29 06:27:00,552 INFO L226 Difference]: Without dead ends: 1376 [2023-11-29 06:27:00,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 577 GetRequests, 565 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:27:00,554 INFO L413 NwaCegarLoop]: 442 mSDtfsCounter, 1413 mSDsluCounter, 1301 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1413 SdHoareTripleChecker+Valid, 1743 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 06:27:00,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1413 Valid, 1743 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 06:27:00,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1376 states. [2023-11-29 06:27:00,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1376 to 1374. [2023-11-29 06:27:00,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1021 states have (on average 1.5024485798237022) internal successors, (1534), 1023 states have internal predecessors, (1534), 327 states have call successors, (327), 25 states have call predecessors, (327), 25 states have return successors, (327), 325 states have call predecessors, (327), 327 states have call successors, (327) [2023-11-29 06:27:00,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2188 transitions. [2023-11-29 06:27:00,667 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2188 transitions. Word has length 568 [2023-11-29 06:27:00,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:27:00,668 INFO L495 AbstractCegarLoop]: Abstraction has 1374 states and 2188 transitions. [2023-11-29 06:27:00,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 24.333333333333332) internal successors, (146), 6 states have internal predecessors, (146), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:27:00,668 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2188 transitions. [2023-11-29 06:27:00,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2023-11-29 06:27:00,672 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:27:00,672 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:27:00,679 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-29 06:27:00,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 06:27:00,873 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:27:00,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:27:00,874 INFO L85 PathProgramCache]: Analyzing trace with hash -85532848, now seen corresponding path program 1 times [2023-11-29 06:27:00,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:27:00,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166826295] [2023-11-29 06:27:00,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:27:00,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:27:00,952 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:27:00,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [51620620] [2023-11-29 06:27:00,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:27:00,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:27:00,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:27:00,954 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:27:00,958 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 06:27:01,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:27:01,397 INFO L262 TraceCheckSpWp]: Trace formula consists of 1409 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:27:01,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:27:01,667 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 6468 proven. 84 refuted. 0 times theorem prover too weak. 7728 trivial. 0 not checked. [2023-11-29 06:27:01,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:27:01,941 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 168 proven. 84 refuted. 0 times theorem prover too weak. 14028 trivial. 0 not checked. [2023-11-29 06:27:01,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:27:01,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166826295] [2023-11-29 06:27:01,942 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:27:01,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51620620] [2023-11-29 06:27:01,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [51620620] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:27:01,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:27:01,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2023-11-29 06:27:01,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341630590] [2023-11-29 06:27:01,942 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:27:01,944 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 06:27:01,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:27:01,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 06:27:01,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:27:01,945 INFO L87 Difference]: Start difference. First operand 1374 states and 2188 transitions. Second operand has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 2 states have call successors, (113), 2 states have call predecessors, (113), 4 states have return successors, (114), 2 states have call predecessors, (114), 2 states have call successors, (114) [2023-11-29 06:27:02,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:27:02,496 INFO L93 Difference]: Finished difference Result 2596 states and 4112 transitions. [2023-11-29 06:27:02,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:27:02,497 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 2 states have call successors, (113), 2 states have call predecessors, (113), 4 states have return successors, (114), 2 states have call predecessors, (114), 2 states have call successors, (114) Word has length 568 [2023-11-29 06:27:02,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:27:02,504 INFO L225 Difference]: With dead ends: 2596 [2023-11-29 06:27:02,504 INFO L226 Difference]: Without dead ends: 1422 [2023-11-29 06:27:02,506 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1142 GetRequests, 1127 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2023-11-29 06:27:02,506 INFO L413 NwaCegarLoop]: 367 mSDtfsCounter, 513 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 458 mSolverCounterSat, 292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 928 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 292 IncrementalHoareTripleChecker+Valid, 458 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:27:02,506 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 928 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [292 Valid, 458 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:27:02,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2023-11-29 06:27:02,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1386. [2023-11-29 06:27:02,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1030 states have (on average 1.4825242718446603) internal successors, (1527), 1032 states have internal predecessors, (1527), 327 states have call successors, (327), 28 states have call predecessors, (327), 28 states have return successors, (327), 325 states have call predecessors, (327), 327 states have call successors, (327) [2023-11-29 06:27:02,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 2181 transitions. [2023-11-29 06:27:02,642 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 2181 transitions. Word has length 568 [2023-11-29 06:27:02,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:27:02,642 INFO L495 AbstractCegarLoop]: Abstraction has 1386 states and 2181 transitions. [2023-11-29 06:27:02,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.375) internal successors, (155), 8 states have internal predecessors, (155), 2 states have call successors, (113), 2 states have call predecessors, (113), 4 states have return successors, (114), 2 states have call predecessors, (114), 2 states have call successors, (114) [2023-11-29 06:27:02,643 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 2181 transitions. [2023-11-29 06:27:02,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2023-11-29 06:27:02,646 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:27:02,646 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:27:02,654 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 06:27:02,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 06:27:02,847 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:27:02,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:27:02,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1899734800, now seen corresponding path program 1 times [2023-11-29 06:27:02,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:27:02,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055119892] [2023-11-29 06:27:02,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:27:02,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:27:02,903 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:27:02,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1375554485] [2023-11-29 06:27:02,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:27:02,903 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:27:02,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:27:02,904 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:27:02,905 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 06:27:03,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:27:03,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 1411 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-29 06:27:03,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:27:03,487 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-29 06:27:03,488 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:27:03,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:27:03,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055119892] [2023-11-29 06:27:03,488 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:27:03,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375554485] [2023-11-29 06:27:03,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375554485] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:27:03,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:27:03,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 06:27:03,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312223315] [2023-11-29 06:27:03,489 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:27:03,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 06:27:03,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:27:03,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 06:27:03,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:27:03,491 INFO L87 Difference]: Start difference. First operand 1386 states and 2181 transitions. Second operand has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:27:03,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:27:03,847 INFO L93 Difference]: Finished difference Result 3256 states and 5101 transitions. [2023-11-29 06:27:03,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 06:27:03,847 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 568 [2023-11-29 06:27:03,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:27:03,860 INFO L225 Difference]: With dead ends: 3256 [2023-11-29 06:27:03,860 INFO L226 Difference]: Without dead ends: 1926 [2023-11-29 06:27:03,863 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 569 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:27:03,864 INFO L413 NwaCegarLoop]: 633 mSDtfsCounter, 403 mSDsluCounter, 1590 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 403 SdHoareTripleChecker+Valid, 2223 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:27:03,864 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [403 Valid, 2223 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 06:27:03,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1926 states. [2023-11-29 06:27:04,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1926 to 1922. [2023-11-29 06:27:04,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1922 states, 1364 states have (on average 1.4318181818181819) internal successors, (1953), 1370 states have internal predecessors, (1953), 509 states have call successors, (509), 48 states have call predecessors, (509), 48 states have return successors, (509), 503 states have call predecessors, (509), 509 states have call successors, (509) [2023-11-29 06:27:04,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1922 states to 1922 states and 2971 transitions. [2023-11-29 06:27:04,120 INFO L78 Accepts]: Start accepts. Automaton has 1922 states and 2971 transitions. Word has length 568 [2023-11-29 06:27:04,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:27:04,121 INFO L495 AbstractCegarLoop]: Abstraction has 1922 states and 2971 transitions. [2023-11-29 06:27:04,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.2) internal successors, (146), 5 states have internal predecessors, (146), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:27:04,121 INFO L276 IsEmpty]: Start isEmpty. Operand 1922 states and 2971 transitions. [2023-11-29 06:27:04,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 569 [2023-11-29 06:27:04,125 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:27:04,126 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:27:04,133 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 06:27:04,326 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 06:27:04,326 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:27:04,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:27:04,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1884216082, now seen corresponding path program 1 times [2023-11-29 06:27:04,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:27:04,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921056902] [2023-11-29 06:27:04,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:27:04,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:27:04,395 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:27:04,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2079822749] [2023-11-29 06:27:04,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:27:04,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:27:04,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:27:04,396 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:27:04,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 06:27:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:27:04,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 1412 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 06:27:04,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:27:05,910 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 7014 proven. 147 refuted. 0 times theorem prover too weak. 7119 trivial. 0 not checked. [2023-11-29 06:27:05,910 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:27:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 105 proven. 147 refuted. 0 times theorem prover too weak. 14028 trivial. 0 not checked. [2023-11-29 06:27:07,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:27:07,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921056902] [2023-11-29 06:27:07,000 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:27:07,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079822749] [2023-11-29 06:27:07,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079822749] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:27:07,000 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:27:07,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2023-11-29 06:27:07,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529131278] [2023-11-29 06:27:07,001 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:27:07,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-29 06:27:07,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:27:07,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-29 06:27:07,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2023-11-29 06:27:07,004 INFO L87 Difference]: Start difference. First operand 1922 states and 2971 transitions. Second operand has 12 states, 12 states have (on average 17.583333333333332) internal successors, (211), 12 states have internal predecessors, (211), 4 states have call successors, (170), 3 states have call predecessors, (170), 5 states have return successors, (170), 4 states have call predecessors, (170), 4 states have call successors, (170) [2023-11-29 06:27:09,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:27:09,220 INFO L93 Difference]: Finished difference Result 7775 states and 12104 transitions. [2023-11-29 06:27:09,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 06:27:09,221 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 17.583333333333332) internal successors, (211), 12 states have internal predecessors, (211), 4 states have call successors, (170), 3 states have call predecessors, (170), 5 states have return successors, (170), 4 states have call predecessors, (170), 4 states have call successors, (170) Word has length 568 [2023-11-29 06:27:09,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:27:09,248 INFO L225 Difference]: With dead ends: 7775 [2023-11-29 06:27:09,249 INFO L226 Difference]: Without dead ends: 6017 [2023-11-29 06:27:09,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1144 GetRequests, 1126 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2023-11-29 06:27:09,254 INFO L413 NwaCegarLoop]: 543 mSDtfsCounter, 2357 mSDsluCounter, 1939 mSDsCounter, 0 mSdLazyCounter, 1370 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2440 SdHoareTripleChecker+Valid, 2482 SdHoareTripleChecker+Invalid, 1957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 1370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:27:09,255 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2440 Valid, 2482 Invalid, 1957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 1370 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-29 06:27:09,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6017 states. [2023-11-29 06:27:09,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6017 to 4413. [2023-11-29 06:27:09,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4413 states, 3392 states have (on average 1.4852594339622642) internal successors, (5038), 3404 states have internal predecessors, (5038), 925 states have call successors, (925), 95 states have call predecessors, (925), 95 states have return successors, (925), 913 states have call predecessors, (925), 925 states have call successors, (925) [2023-11-29 06:27:09,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4413 states to 4413 states and 6888 transitions. [2023-11-29 06:27:09,817 INFO L78 Accepts]: Start accepts. Automaton has 4413 states and 6888 transitions. Word has length 568 [2023-11-29 06:27:09,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:27:09,818 INFO L495 AbstractCegarLoop]: Abstraction has 4413 states and 6888 transitions. [2023-11-29 06:27:09,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.583333333333332) internal successors, (211), 12 states have internal predecessors, (211), 4 states have call successors, (170), 3 states have call predecessors, (170), 5 states have return successors, (170), 4 states have call predecessors, (170), 4 states have call successors, (170) [2023-11-29 06:27:09,818 INFO L276 IsEmpty]: Start isEmpty. Operand 4413 states and 6888 transitions. [2023-11-29 06:27:09,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2023-11-29 06:27:09,823 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:27:09,824 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:27:09,831 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-29 06:27:10,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 06:27:10,024 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:27:10,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:27:10,025 INFO L85 PathProgramCache]: Analyzing trace with hash 1993615221, now seen corresponding path program 1 times [2023-11-29 06:27:10,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:27:10,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739608975] [2023-11-29 06:27:10,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:27:10,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:27:10,091 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:27:10,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1812995277] [2023-11-29 06:27:10,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:27:10,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:27:10,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:27:10,092 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:27:10,098 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 06:27:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:27:10,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 1415 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 06:27:10,659 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:27:11,295 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 7134 proven. 111 refuted. 0 times theorem prover too weak. 7035 trivial. 0 not checked. [2023-11-29 06:27:11,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:27:11,738 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 141 proven. 111 refuted. 0 times theorem prover too weak. 14028 trivial. 0 not checked. [2023-11-29 06:27:11,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:27:11,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739608975] [2023-11-29 06:27:11,738 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:27:11,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812995277] [2023-11-29 06:27:11,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812995277] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:27:11,738 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:27:11,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2023-11-29 06:27:11,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678361768] [2023-11-29 06:27:11,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:27:11,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 06:27:11,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:27:11,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 06:27:11,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:27:11,742 INFO L87 Difference]: Start difference. First operand 4413 states and 6888 transitions. Second operand has 18 states, 18 states have (on average 14.38888888888889) internal successors, (259), 18 states have internal predecessors, (259), 3 states have call successors, (122), 2 states have call predecessors, (122), 4 states have return successors, (123), 3 states have call predecessors, (123), 3 states have call successors, (123) [2023-11-29 06:27:16,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:27:16,503 INFO L93 Difference]: Finished difference Result 24235 states and 37247 transitions. [2023-11-29 06:27:16,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 06:27:16,503 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 14.38888888888889) internal successors, (259), 18 states have internal predecessors, (259), 3 states have call successors, (122), 2 states have call predecessors, (122), 4 states have return successors, (123), 3 states have call predecessors, (123), 3 states have call successors, (123) Word has length 569 [2023-11-29 06:27:16,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:27:16,559 INFO L225 Difference]: With dead ends: 24235 [2023-11-29 06:27:16,559 INFO L226 Difference]: Without dead ends: 20067 [2023-11-29 06:27:16,572 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1168 GetRequests, 1121 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=586, Invalid=1766, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 06:27:16,573 INFO L413 NwaCegarLoop]: 567 mSDtfsCounter, 1696 mSDsluCounter, 4450 mSDsCounter, 0 mSdLazyCounter, 3985 mSolverCounterSat, 500 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1884 SdHoareTripleChecker+Valid, 5017 SdHoareTripleChecker+Invalid, 4485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 500 IncrementalHoareTripleChecker+Valid, 3985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-29 06:27:16,573 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1884 Valid, 5017 Invalid, 4485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [500 Valid, 3985 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-29 06:27:16,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20067 states. [2023-11-29 06:27:17,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20067 to 9817. [2023-11-29 06:27:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9817 states, 8046 states have (on average 1.5237385036042754) internal successors, (12260), 8074 states have internal predecessors, (12260), 1581 states have call successors, (1581), 189 states have call predecessors, (1581), 189 states have return successors, (1581), 1553 states have call predecessors, (1581), 1581 states have call successors, (1581) [2023-11-29 06:27:17,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9817 states to 9817 states and 15422 transitions. [2023-11-29 06:27:17,782 INFO L78 Accepts]: Start accepts. Automaton has 9817 states and 15422 transitions. Word has length 569 [2023-11-29 06:27:17,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:27:17,783 INFO L495 AbstractCegarLoop]: Abstraction has 9817 states and 15422 transitions. [2023-11-29 06:27:17,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 14.38888888888889) internal successors, (259), 18 states have internal predecessors, (259), 3 states have call successors, (122), 2 states have call predecessors, (122), 4 states have return successors, (123), 3 states have call predecessors, (123), 3 states have call successors, (123) [2023-11-29 06:27:17,783 INFO L276 IsEmpty]: Start isEmpty. Operand 9817 states and 15422 transitions. [2023-11-29 06:27:17,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 570 [2023-11-29 06:27:17,791 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:27:17,792 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:27:17,799 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-29 06:27:17,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 06:27:17,992 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:27:17,992 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:27:17,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1347411917, now seen corresponding path program 1 times [2023-11-29 06:27:17,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:27:17,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491910434] [2023-11-29 06:27:17,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:27:17,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:27:18,066 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:27:18,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1230322856] [2023-11-29 06:27:18,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:27:18,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:27:18,067 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:27:18,068 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:27:18,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 06:27:18,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:27:18,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 1414 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 06:27:18,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:27:18,589 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-29 06:27:18,589 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:27:18,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:27:18,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491910434] [2023-11-29 06:27:18,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:27:18,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230322856] [2023-11-29 06:27:18,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230322856] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:27:18,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:27:18,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:27:18,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361647983] [2023-11-29 06:27:18,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:27:18,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 06:27:18,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:27:18,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 06:27:18,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:27:18,593 INFO L87 Difference]: Start difference. First operand 9817 states and 15422 transitions. Second operand has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:27:19,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:27:19,795 INFO L93 Difference]: Finished difference Result 24901 states and 39163 transitions. [2023-11-29 06:27:19,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 06:27:19,796 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 569 [2023-11-29 06:27:19,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:27:19,822 INFO L225 Difference]: With dead ends: 24901 [2023-11-29 06:27:19,822 INFO L226 Difference]: Without dead ends: 15337 [2023-11-29 06:27:19,835 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 06:27:19,836 INFO L413 NwaCegarLoop]: 688 mSDtfsCounter, 396 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 396 SdHoareTripleChecker+Valid, 1135 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 06:27:19,836 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [396 Valid, 1135 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 06:27:19,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15337 states. [2023-11-29 06:27:21,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15337 to 15331. [2023-11-29 06:27:21,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15331 states, 12683 states have (on average 1.5281084916817789) internal successors, (19381), 12727 states have internal predecessors, (19381), 2353 states have call successors, (2353), 294 states have call predecessors, (2353), 294 states have return successors, (2353), 2309 states have call predecessors, (2353), 2353 states have call successors, (2353) [2023-11-29 06:27:21,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15331 states to 15331 states and 24087 transitions. [2023-11-29 06:27:21,355 INFO L78 Accepts]: Start accepts. Automaton has 15331 states and 24087 transitions. Word has length 569 [2023-11-29 06:27:21,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:27:21,356 INFO L495 AbstractCegarLoop]: Abstraction has 15331 states and 24087 transitions. [2023-11-29 06:27:21,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 49.0) internal successors, (147), 3 states have internal predecessors, (147), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:27:21,356 INFO L276 IsEmpty]: Start isEmpty. Operand 15331 states and 24087 transitions. [2023-11-29 06:27:21,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-29 06:27:21,372 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:27:21,373 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:27:21,382 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 06:27:21,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 06:27:21,574 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:27:21,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:27:21,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1973966764, now seen corresponding path program 1 times [2023-11-29 06:27:21,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:27:21,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613386234] [2023-11-29 06:27:21,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:27:21,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:27:21,637 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:27:21,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [513289385] [2023-11-29 06:27:21,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:27:21,637 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:27:21,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:27:21,638 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:27:21,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 06:27:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:27:22,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 06:27:22,132 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:27:24,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 8790 proven. 240 refuted. 0 times theorem prover too weak. 5250 trivial. 0 not checked. [2023-11-29 06:27:24,442 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:27:26,111 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 141 proven. 111 refuted. 0 times theorem prover too weak. 14028 trivial. 0 not checked. [2023-11-29 06:27:26,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:27:26,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613386234] [2023-11-29 06:27:26,111 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:27:26,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513289385] [2023-11-29 06:27:26,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513289385] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:27:26,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:27:26,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 27 [2023-11-29 06:27:26,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781235221] [2023-11-29 06:27:26,112 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:27:26,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 06:27:26,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:27:26,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 06:27:26,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2023-11-29 06:27:26,114 INFO L87 Difference]: Start difference. First operand 15331 states and 24087 transitions. Second operand has 27 states, 27 states have (on average 11.222222222222221) internal successors, (303), 27 states have internal predecessors, (303), 7 states have call successors, (170), 5 states have call predecessors, (170), 8 states have return successors, (170), 7 states have call predecessors, (170), 7 states have call successors, (170) [2023-11-29 06:28:08,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:28:08,506 INFO L93 Difference]: Finished difference Result 203589 states and 313779 transitions. [2023-11-29 06:28:08,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 204 states. [2023-11-29 06:28:08,507 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 11.222222222222221) internal successors, (303), 27 states have internal predecessors, (303), 7 states have call successors, (170), 5 states have call predecessors, (170), 8 states have return successors, (170), 7 states have call predecessors, (170), 7 states have call successors, (170) Word has length 570 [2023-11-29 06:28:08,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:28:08,832 INFO L225 Difference]: With dead ends: 203589 [2023-11-29 06:28:08,832 INFO L226 Difference]: Without dead ends: 188595 [2023-11-29 06:28:08,895 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1355 GetRequests, 1136 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21967 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=8695, Invalid=39925, Unknown=0, NotChecked=0, Total=48620 [2023-11-29 06:28:08,895 INFO L413 NwaCegarLoop]: 506 mSDtfsCounter, 21850 mSDsluCounter, 6007 mSDsCounter, 0 mSdLazyCounter, 5264 mSolverCounterSat, 8851 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21898 SdHoareTripleChecker+Valid, 6513 SdHoareTripleChecker+Invalid, 14115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 8851 IncrementalHoareTripleChecker+Valid, 5264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:28:08,895 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21898 Valid, 6513 Invalid, 14115 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [8851 Valid, 5264 Invalid, 0 Unknown, 0 Unchecked, 10.4s Time] [2023-11-29 06:28:09,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188595 states. [2023-11-29 06:28:17,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188595 to 56783. [2023-11-29 06:28:17,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56783 states, 48540 states have (on average 1.5437577255871446) internal successors, (74934), 48692 states have internal predecessors, (74934), 7193 states have call successors, (7193), 1049 states have call predecessors, (7193), 1049 states have return successors, (7193), 7041 states have call predecessors, (7193), 7193 states have call successors, (7193) [2023-11-29 06:28:17,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56783 states to 56783 states and 89320 transitions. [2023-11-29 06:28:17,924 INFO L78 Accepts]: Start accepts. Automaton has 56783 states and 89320 transitions. Word has length 570 [2023-11-29 06:28:17,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:28:17,924 INFO L495 AbstractCegarLoop]: Abstraction has 56783 states and 89320 transitions. [2023-11-29 06:28:17,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 11.222222222222221) internal successors, (303), 27 states have internal predecessors, (303), 7 states have call successors, (170), 5 states have call predecessors, (170), 8 states have return successors, (170), 7 states have call predecessors, (170), 7 states have call successors, (170) [2023-11-29 06:28:17,925 INFO L276 IsEmpty]: Start isEmpty. Operand 56783 states and 89320 transitions. [2023-11-29 06:28:17,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-29 06:28:17,950 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:28:17,951 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:28:17,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 06:28:18,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 06:28:18,151 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:28:18,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:28:18,152 INFO L85 PathProgramCache]: Analyzing trace with hash -788912983, now seen corresponding path program 1 times [2023-11-29 06:28:18,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:28:18,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198401095] [2023-11-29 06:28:18,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:28:18,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:28:18,210 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:28:18,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [555093005] [2023-11-29 06:28:18,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:28:18,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:28:18,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:28:18,212 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:28:18,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 06:28:18,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:28:18,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 06:28:18,757 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:28:18,926 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-29 06:28:18,926 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:28:18,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:28:18,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198401095] [2023-11-29 06:28:18,926 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:28:18,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555093005] [2023-11-29 06:28:18,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555093005] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:28:18,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:28:18,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 06:28:18,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214987396] [2023-11-29 06:28:18,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:28:18,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:28:18,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:28:18,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:28:18,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:28:18,929 INFO L87 Difference]: Start difference. First operand 56783 states and 89320 transitions. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:28:32,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:28:32,763 INFO L93 Difference]: Finished difference Result 183571 states and 291121 transitions. [2023-11-29 06:28:32,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 06:28:32,763 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 570 [2023-11-29 06:28:32,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:28:32,962 INFO L225 Difference]: With dead ends: 183571 [2023-11-29 06:28:32,962 INFO L226 Difference]: Without dead ends: 108713 [2023-11-29 06:28:33,019 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 565 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2023-11-29 06:28:33,020 INFO L413 NwaCegarLoop]: 435 mSDtfsCounter, 1234 mSDsluCounter, 1459 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1234 SdHoareTripleChecker+Valid, 1894 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 06:28:33,020 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1234 Valid, 1894 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 06:28:33,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108713 states. [2023-11-29 06:28:41,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108713 to 73833. [2023-11-29 06:28:41,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73833 states, 65589 states have (on average 1.5549101221241366) internal successors, (101985), 65741 states have internal predecessors, (101985), 7193 states have call successors, (7193), 1050 states have call predecessors, (7193), 1050 states have return successors, (7193), 7041 states have call predecessors, (7193), 7193 states have call successors, (7193) [2023-11-29 06:28:41,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73833 states to 73833 states and 116371 transitions. [2023-11-29 06:28:41,347 INFO L78 Accepts]: Start accepts. Automaton has 73833 states and 116371 transitions. Word has length 570 [2023-11-29 06:28:41,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:28:41,347 INFO L495 AbstractCegarLoop]: Abstraction has 73833 states and 116371 transitions. [2023-11-29 06:28:41,347 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 7 states have internal predecessors, (148), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:28:41,347 INFO L276 IsEmpty]: Start isEmpty. Operand 73833 states and 116371 transitions. [2023-11-29 06:28:41,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-29 06:28:41,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:28:41,600 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:28:41,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 06:28:41,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:28:41,800 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:28:41,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:28:41,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1901114925, now seen corresponding path program 1 times [2023-11-29 06:28:41,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:28:41,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714625422] [2023-11-29 06:28:41,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:28:41,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:28:41,875 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:28:41,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [869312762] [2023-11-29 06:28:41,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:28:41,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:28:41,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:28:41,877 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:28:41,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 06:28:42,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:28:42,373 INFO L262 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 06:28:42,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:28:43,062 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-29 06:28:43,062 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:28:43,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:28:43,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714625422] [2023-11-29 06:28:43,062 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:28:43,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869312762] [2023-11-29 06:28:43,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869312762] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:28:43,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:28:43,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 06:28:43,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195100652] [2023-11-29 06:28:43,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:28:43,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 06:28:43,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:28:43,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 06:28:43,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-29 06:28:43,065 INFO L87 Difference]: Start difference. First operand 73833 states and 116371 transitions. Second operand has 8 states, 8 states have (on average 18.5) internal successors, (148), 7 states have internal predecessors, (148), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:29:01,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:29:01,463 INFO L93 Difference]: Finished difference Result 231931 states and 365014 transitions. [2023-11-29 06:29:01,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 06:29:01,464 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 7 states have internal predecessors, (148), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 570 [2023-11-29 06:29:01,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:29:01,682 INFO L225 Difference]: With dead ends: 231931 [2023-11-29 06:29:01,682 INFO L226 Difference]: Without dead ends: 158735 [2023-11-29 06:29:01,733 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 563 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2023-11-29 06:29:01,734 INFO L413 NwaCegarLoop]: 434 mSDtfsCounter, 1660 mSDsluCounter, 1719 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1660 SdHoareTripleChecker+Valid, 2153 SdHoareTripleChecker+Invalid, 1005 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 06:29:01,734 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1660 Valid, 2153 Invalid, 1005 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 06:29:01,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158735 states. [2023-11-29 06:29:17,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158735 to 139645. [2023-11-29 06:29:17,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139645 states, 123941 states have (on average 1.5484545065797435) internal successors, (191917), 124229 states have internal predecessors, (191917), 13701 states have call successors, (13701), 2002 states have call predecessors, (13701), 2002 states have return successors, (13701), 13413 states have call predecessors, (13701), 13701 states have call successors, (13701) [2023-11-29 06:29:17,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139645 states to 139645 states and 219319 transitions. [2023-11-29 06:29:17,800 INFO L78 Accepts]: Start accepts. Automaton has 139645 states and 219319 transitions. Word has length 570 [2023-11-29 06:29:17,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:29:17,801 INFO L495 AbstractCegarLoop]: Abstraction has 139645 states and 219319 transitions. [2023-11-29 06:29:17,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 18.5) internal successors, (148), 7 states have internal predecessors, (148), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:29:17,801 INFO L276 IsEmpty]: Start isEmpty. Operand 139645 states and 219319 transitions. [2023-11-29 06:29:17,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-29 06:29:17,832 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:29:17,833 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:29:17,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 06:29:18,033 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2023-11-29 06:29:18,033 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:29:18,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:29:18,034 INFO L85 PathProgramCache]: Analyzing trace with hash -2119092757, now seen corresponding path program 1 times [2023-11-29 06:29:18,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:29:18,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239967759] [2023-11-29 06:29:18,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:29:18,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:29:18,094 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:29:18,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1457179048] [2023-11-29 06:29:18,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:29:18,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:29:18,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:29:18,096 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:29:18,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 06:29:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:29:18,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 1415 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 06:29:18,573 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:29:19,021 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-29 06:29:19,021 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:29:19,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:29:19,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239967759] [2023-11-29 06:29:19,022 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:29:19,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457179048] [2023-11-29 06:29:19,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457179048] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:29:19,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:29:19,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 06:29:19,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631111345] [2023-11-29 06:29:19,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:29:19,023 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 06:29:19,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:29:19,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 06:29:19,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 06:29:19,024 INFO L87 Difference]: Start difference. First operand 139645 states and 219319 transitions. Second operand has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 6 states have internal predecessors, (148), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:29:53,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:29:53,047 INFO L93 Difference]: Finished difference Result 458561 states and 717621 transitions. [2023-11-29 06:29:53,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 06:29:53,048 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 6 states have internal predecessors, (148), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 570 [2023-11-29 06:29:53,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:29:53,734 INFO L225 Difference]: With dead ends: 458561 [2023-11-29 06:29:53,734 INFO L226 Difference]: Without dead ends: 319553 [2023-11-29 06:29:53,859 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 575 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2023-11-29 06:29:53,859 INFO L413 NwaCegarLoop]: 824 mSDtfsCounter, 1498 mSDsluCounter, 4036 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 198 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1498 SdHoareTripleChecker+Valid, 4860 SdHoareTripleChecker+Invalid, 1216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 198 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:29:53,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1498 Valid, 4860 Invalid, 1216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [198 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 06:29:54,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319553 states. [2023-11-29 06:30:25,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319553 to 282275. [2023-11-29 06:30:25,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282275 states, 250967 states have (on average 1.5480800264576617) internal successors, (388517), 251543 states have internal predecessors, (388517), 27317 states have call successors, (27317), 3990 states have call predecessors, (27317), 3990 states have return successors, (27317), 26741 states have call predecessors, (27317), 27317 states have call successors, (27317) [2023-11-29 06:30:26,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282275 states to 282275 states and 443151 transitions. [2023-11-29 06:30:26,759 INFO L78 Accepts]: Start accepts. Automaton has 282275 states and 443151 transitions. Word has length 570 [2023-11-29 06:30:26,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:30:26,760 INFO L495 AbstractCegarLoop]: Abstraction has 282275 states and 443151 transitions. [2023-11-29 06:30:26,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 21.142857142857142) internal successors, (148), 6 states have internal predecessors, (148), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:30:26,760 INFO L276 IsEmpty]: Start isEmpty. Operand 282275 states and 443151 transitions. [2023-11-29 06:30:26,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 571 [2023-11-29 06:30:26,804 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:30:26,805 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:30:26,812 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 06:30:27,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:30:27,005 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:30:27,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:30:27,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1860927319, now seen corresponding path program 1 times [2023-11-29 06:30:27,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:30:27,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600638257] [2023-11-29 06:30:27,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:30:27,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:30:27,076 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:30:27,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [568644123] [2023-11-29 06:30:27,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:30:27,076 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:30:27,076 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:30:27,077 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:30:27,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 06:30:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:30:27,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 1416 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 06:30:27,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:30:29,545 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 8740 proven. 132 refuted. 0 times theorem prover too weak. 5408 trivial. 0 not checked. [2023-11-29 06:30:29,545 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:30:31,144 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-29 06:30:31,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:30:31,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600638257] [2023-11-29 06:30:31,144 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:30:31,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568644123] [2023-11-29 06:30:31,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568644123] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 06:30:31,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 06:30:31,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 18 [2023-11-29 06:30:31,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885440732] [2023-11-29 06:30:31,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:30:31,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 06:30:31,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:30:31,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 06:30:31,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2023-11-29 06:30:31,147 INFO L87 Difference]: Start difference. First operand 282275 states and 443151 transitions. Second operand has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 3 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 3 states have call predecessors, (85), 3 states have call successors, (85) [2023-11-29 06:31:06,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:31:06,373 INFO L93 Difference]: Finished difference Result 686265 states and 1082832 transitions. [2023-11-29 06:31:06,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 06:31:06,374 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 3 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 3 states have call predecessors, (85), 3 states have call successors, (85) Word has length 570 [2023-11-29 06:31:06,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:31:07,111 INFO L225 Difference]: With dead ends: 686265 [2023-11-29 06:31:07,111 INFO L226 Difference]: Without dead ends: 404627 [2023-11-29 06:31:07,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1157 GetRequests, 1127 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2023-11-29 06:31:07,489 INFO L413 NwaCegarLoop]: 649 mSDtfsCounter, 2936 mSDsluCounter, 3495 mSDsCounter, 0 mSdLazyCounter, 929 mSolverCounterSat, 778 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2936 SdHoareTripleChecker+Valid, 4144 SdHoareTripleChecker+Invalid, 1707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 778 IncrementalHoareTripleChecker+Valid, 929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 06:31:07,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2936 Valid, 4144 Invalid, 1707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [778 Valid, 929 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 06:31:07,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404627 states. [2023-11-29 06:31:36,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404627 to 240995. [2023-11-29 06:31:36,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240995 states, 215991 states have (on average 1.551328527577538) internal successors, (335073), 216439 states have internal predecessors, (335073), 21829 states have call successors, (21829), 3174 states have call predecessors, (21829), 3174 states have return successors, (21829), 21381 states have call predecessors, (21829), 21829 states have call successors, (21829) [2023-11-29 06:31:37,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240995 states to 240995 states and 378731 transitions. [2023-11-29 06:31:37,649 INFO L78 Accepts]: Start accepts. Automaton has 240995 states and 378731 transitions. Word has length 570 [2023-11-29 06:31:37,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:31:37,650 INFO L495 AbstractCegarLoop]: Abstraction has 240995 states and 378731 transitions. [2023-11-29 06:31:37,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.444444444444443) internal successors, (148), 9 states have internal predecessors, (148), 3 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 3 states have call predecessors, (85), 3 states have call successors, (85) [2023-11-29 06:31:37,650 INFO L276 IsEmpty]: Start isEmpty. Operand 240995 states and 378731 transitions. [2023-11-29 06:31:37,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2023-11-29 06:31:37,677 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:31:37,678 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:31:37,686 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 06:31:37,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:31:37,878 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:31:37,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:31:37,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1524100374, now seen corresponding path program 1 times [2023-11-29 06:31:37,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:31:37,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724242660] [2023-11-29 06:31:37,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:37,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:31:37,936 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:31:37,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1353050926] [2023-11-29 06:31:37,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:31:37,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:31:37,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:31:37,937 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:31:37,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 06:31:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:31:38,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 1417 conjuncts, 35 conjunts are in the unsatisfiable core [2023-11-29 06:31:38,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:31:41,495 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 9314 proven. 285 refuted. 0 times theorem prover too weak. 4681 trivial. 0 not checked. [2023-11-29 06:31:41,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 06:31:42,394 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 174 proven. 78 refuted. 0 times theorem prover too weak. 14028 trivial. 0 not checked. [2023-11-29 06:31:42,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:31:42,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724242660] [2023-11-29 06:31:42,394 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:31:42,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353050926] [2023-11-29 06:31:42,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353050926] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 06:31:42,394 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 06:31:42,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 23 [2023-11-29 06:31:42,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305953902] [2023-11-29 06:31:42,395 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 06:31:42,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 06:31:42,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:31:42,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 06:31:42,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2023-11-29 06:31:42,398 INFO L87 Difference]: Start difference. First operand 240995 states and 378731 transitions. Second operand has 23 states, 23 states have (on average 12.782608695652174) internal successors, (294), 22 states have internal predecessors, (294), 6 states have call successors, (170), 5 states have call predecessors, (170), 8 states have return successors, (170), 6 states have call predecessors, (170), 6 states have call successors, (170) [2023-11-29 06:34:56,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:34:56,227 INFO L93 Difference]: Finished difference Result 1682783 states and 2630408 transitions. [2023-11-29 06:34:56,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-11-29 06:34:56,228 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 12.782608695652174) internal successors, (294), 22 states have internal predecessors, (294), 6 states have call successors, (170), 5 states have call predecessors, (170), 8 states have return successors, (170), 6 states have call predecessors, (170), 6 states have call successors, (170) Word has length 571 [2023-11-29 06:34:56,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:34:58,946 INFO L225 Difference]: With dead ends: 1682783 [2023-11-29 06:34:58,946 INFO L226 Difference]: Without dead ends: 1442425 [2023-11-29 06:34:59,409 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1231 GetRequests, 1127 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3834 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2206, Invalid=8924, Unknown=0, NotChecked=0, Total=11130 [2023-11-29 06:34:59,410 INFO L413 NwaCegarLoop]: 1216 mSDtfsCounter, 3354 mSDsluCounter, 13152 mSDsCounter, 0 mSdLazyCounter, 9161 mSolverCounterSat, 885 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3424 SdHoareTripleChecker+Valid, 14368 SdHoareTripleChecker+Invalid, 10046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 885 IncrementalHoareTripleChecker+Valid, 9161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.2s IncrementalHoareTripleChecker+Time [2023-11-29 06:34:59,410 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3424 Valid, 14368 Invalid, 10046 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [885 Valid, 9161 Invalid, 0 Unknown, 0 Unchecked, 8.2s Time] [2023-11-29 06:35:00,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1442425 states. [2023-11-29 06:36:38,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1442425 to 756557. [2023-11-29 06:36:39,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756557 states, 689380 states have (on average 1.5596623052597987) internal successors, (1075200), 690492 states have internal predecessors, (1075200), 57077 states have call successors, (57077), 10099 states have call predecessors, (57077), 10099 states have return successors, (57077), 55965 states have call predecessors, (57077), 57077 states have call successors, (57077) [2023-11-29 06:36:41,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756557 states to 756557 states and 1189354 transitions. [2023-11-29 06:36:41,641 INFO L78 Accepts]: Start accepts. Automaton has 756557 states and 1189354 transitions. Word has length 571 [2023-11-29 06:36:41,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 06:36:41,641 INFO L495 AbstractCegarLoop]: Abstraction has 756557 states and 1189354 transitions. [2023-11-29 06:36:41,642 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 12.782608695652174) internal successors, (294), 22 states have internal predecessors, (294), 6 states have call successors, (170), 5 states have call predecessors, (170), 8 states have return successors, (170), 6 states have call predecessors, (170), 6 states have call successors, (170) [2023-11-29 06:36:41,642 INFO L276 IsEmpty]: Start isEmpty. Operand 756557 states and 1189354 transitions. [2023-11-29 06:36:41,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2023-11-29 06:36:41,708 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 06:36:41,709 INFO L195 NwaCegarLoop]: trace histogram [85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 06:36:41,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 06:36:41,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:41,909 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 06:36:41,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 06:36:41,910 INFO L85 PathProgramCache]: Analyzing trace with hash -1894847916, now seen corresponding path program 1 times [2023-11-29 06:36:41,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 06:36:41,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543945562] [2023-11-29 06:36:41,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:41,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 06:36:41,961 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 06:36:41,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [196866740] [2023-11-29 06:36:41,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 06:36:41,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 06:36:41,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 06:36:41,962 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 06:36:41,963 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c5ca6d5-ad75-4831-800a-8fc62885f037/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 06:36:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 06:36:42,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 1415 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-29 06:36:42,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 06:36:43,694 INFO L134 CoverageAnalysis]: Checked inductivity of 14280 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 14280 trivial. 0 not checked. [2023-11-29 06:36:43,694 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 06:36:43,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 06:36:43,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543945562] [2023-11-29 06:36:43,694 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 06:36:43,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196866740] [2023-11-29 06:36:43,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196866740] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 06:36:43,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 06:36:43,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 06:36:43,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381066498] [2023-11-29 06:36:43,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 06:36:43,696 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 06:36:43,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 06:36:43,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 06:36:43,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 06:36:43,697 INFO L87 Difference]: Start difference. First operand 756557 states and 1189354 transitions. Second operand has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) [2023-11-29 06:38:31,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 06:38:31,502 INFO L93 Difference]: Finished difference Result 1677870 states and 2637219 transitions. [2023-11-29 06:38:31,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 06:38:31,503 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 37.25) internal successors, (149), 3 states have internal predecessors, (149), 1 states have call successors, (85), 1 states have call predecessors, (85), 1 states have return successors, (85), 1 states have call predecessors, (85), 1 states have call successors, (85) Word has length 571 [2023-11-29 06:38:31,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 06:38:33,272 INFO L225 Difference]: With dead ends: 1677870 [2023-11-29 06:38:33,272 INFO L226 Difference]: Without dead ends: 922264 [2023-11-29 06:38:33,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 571 GetRequests, 568 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 06:38:33,725 INFO L413 NwaCegarLoop]: 637 mSDtfsCounter, 267 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 1458 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 06:38:33,725 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 1458 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 06:38:34,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 922264 states.