./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-81.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_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/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_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-81.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/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_d3cc1700-20bf-4598-85c0-efe0884d2824/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 c0b041aa2b39223b19922ade0fcc5fbdd940e679150ec973bead00d3f56ba2c8 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:27:47,030 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:27:47,097 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 02:27:47,103 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:27:47,103 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:27:47,129 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:27:47,130 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:27:47,130 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:27:47,131 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:27:47,132 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:27:47,132 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:27:47,133 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:27:47,134 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:27:47,134 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:27:47,135 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:27:47,135 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:27:47,136 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 02:27:47,136 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:27:47,137 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:27:47,137 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:27:47,138 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:27:47,139 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 02:27:47,139 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:27:47,140 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 02:27:47,140 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:27:47,141 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 02:27:47,141 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:27:47,142 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:27:47,142 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:27:47,142 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:27:47,143 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:27:47,143 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:27:47,144 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:27:47,144 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:27:47,144 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 02:27:47,144 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:27:47,145 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:27:47,145 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:27:47,145 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:27:47,145 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 02:27:47,145 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:27:47,146 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:27:47,146 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_d3cc1700-20bf-4598-85c0-efe0884d2824/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c0b041aa2b39223b19922ade0fcc5fbdd940e679150ec973bead00d3f56ba2c8 [2023-11-29 02:27:47,383 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:27:47,405 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:27:47,407 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:27:47,409 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:27:47,409 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:27:47,411 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-81.i [2023-11-29 02:27:50,466 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:27:50,661 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:27:50,662 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-81.i [2023-11-29 02:27:50,674 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/data/35ad921f2/27677d694b384c8c918fa3eb0a82dfaf/FLAG6611e2b13 [2023-11-29 02:27:50,691 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/data/35ad921f2/27677d694b384c8c918fa3eb0a82dfaf [2023-11-29 02:27:50,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:27:50,695 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:27:50,697 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:27:50,697 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:27:50,703 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:27:50,704 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:27:50" (1/1) ... [2023-11-29 02:27:50,705 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@421e260 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:27:50, skipping insertion in model container [2023-11-29 02:27:50,705 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:27:50" (1/1) ... [2023-11-29 02:27:50,746 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:27:50,914 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_d3cc1700-20bf-4598-85c0-efe0884d2824/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-81.i[919,932] [2023-11-29 02:27:51,002 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:27:51,018 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:27:51,032 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_d3cc1700-20bf-4598-85c0-efe0884d2824/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-pe-co_file-81.i[919,932] [2023-11-29 02:27:51,079 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:27:51,100 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:27:51,100 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:27:51 WrapperNode [2023-11-29 02:27:51,101 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:27:51,102 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:27:51,102 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:27:51,102 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:27:51,111 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:27:51" (1/1) ... [2023-11-29 02:27:51,126 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:27:51" (1/1) ... [2023-11-29 02:27:51,173 INFO L138 Inliner]: procedures = 26, calls = 61, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 307 [2023-11-29 02:27:51,174 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:27:51,175 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:27:51,175 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:27:51,175 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:27:51,187 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:27:51" (1/1) ... [2023-11-29 02:27:51,188 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:27:51" (1/1) ... [2023-11-29 02:27:51,193 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:27:51" (1/1) ... [2023-11-29 02:27:51,218 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 02:27:51,219 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:27:51" (1/1) ... [2023-11-29 02:27:51,219 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:27:51" (1/1) ... [2023-11-29 02:27:51,237 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:27:51" (1/1) ... [2023-11-29 02:27:51,242 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:27:51" (1/1) ... [2023-11-29 02:27:51,248 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:27:51" (1/1) ... [2023-11-29 02:27:51,252 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:27:51" (1/1) ... [2023-11-29 02:27:51,264 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:27:51,265 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:27:51,265 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:27:51,265 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:27:51,266 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:27:51" (1/1) ... [2023-11-29 02:27:51,273 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:27:51,285 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:27:51,297 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:27:51,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:27:51,345 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 02:27:51,345 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 02:27:51,346 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 02:27:51,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 02:27:51,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:27:51,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:27:51,451 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:27:51,453 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:27:51,977 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:27:52,016 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:27:52,016 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 02:27:52,017 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:27:52 BoogieIcfgContainer [2023-11-29 02:27:52,017 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:27:52,020 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:27:52,021 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:27:52,024 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:27:52,024 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:27:50" (1/3) ... [2023-11-29 02:27:52,025 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cfd39fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:27:52, skipping insertion in model container [2023-11-29 02:27:52,025 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:27:51" (2/3) ... [2023-11-29 02:27:52,025 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cfd39fa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:27:52, skipping insertion in model container [2023-11-29 02:27:52,026 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:27:52" (3/3) ... [2023-11-29 02:27:52,027 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-pe-co_file-81.i [2023-11-29 02:27:52,048 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:27:52,048 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 02:27:52,099 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:27:52,105 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;@7337defd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:27:52,105 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 02:27:52,110 INFO L276 IsEmpty]: Start isEmpty. Operand has 121 states, 70 states have (on average 1.4857142857142858) internal successors, (104), 71 states have internal predecessors, (104), 48 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2023-11-29 02:27:52,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2023-11-29 02:27:52,137 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:27:52,138 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:27:52,139 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:27:52,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:27:52,145 INFO L85 PathProgramCache]: Analyzing trace with hash 978983210, now seen corresponding path program 1 times [2023-11-29 02:27:52,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:27:52,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928089165] [2023-11-29 02:27:52,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:52,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:27:52,403 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:27:52,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551312356] [2023-11-29 02:27:52,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:52,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:27:52,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:27:52,410 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:27:52,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:27:52,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:27:52,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 02:27:52,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:27:53,345 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 1311 proven. 117 refuted. 0 times theorem prover too weak. 3084 trivial. 0 not checked. [2023-11-29 02:27:53,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:27:53,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 4371 trivial. 0 not checked. [2023-11-29 02:27:53,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:27:53,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928089165] [2023-11-29 02:27:53,797 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:27:53,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551312356] [2023-11-29 02:27:53,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551312356] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:27:53,798 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:27:53,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2023-11-29 02:27:53,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4975390] [2023-11-29 02:27:53,802 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:27:53,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:27:53,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:27:53,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:27:53,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-29 02:27:53,845 INFO L87 Difference]: Start difference. First operand has 121 states, 70 states have (on average 1.4857142857142858) internal successors, (104), 71 states have internal predecessors, (104), 48 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) Second operand has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 3 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 3 states have call predecessors, (88), 3 states have call successors, (88) [2023-11-29 02:27:54,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:27:54,878 INFO L93 Difference]: Finished difference Result 338 states and 651 transitions. [2023-11-29 02:27:54,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 02:27:54,881 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 3 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 3 states have call predecessors, (88), 3 states have call successors, (88) Word has length 291 [2023-11-29 02:27:54,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:27:54,897 INFO L225 Difference]: With dead ends: 338 [2023-11-29 02:27:54,897 INFO L226 Difference]: Without dead ends: 218 [2023-11-29 02:27:54,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 573 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:27:54,908 INFO L413 NwaCegarLoop]: 220 mSDtfsCounter, 261 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:27:54,909 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [270 Valid, 549 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 02:27:54,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2023-11-29 02:27:54,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 123. [2023-11-29 02:27:54,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 72 states have (on average 1.4027777777777777) internal successors, (101), 72 states have internal predecessors, (101), 48 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2023-11-29 02:27:55,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 197 transitions. [2023-11-29 02:27:55,004 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 197 transitions. Word has length 291 [2023-11-29 02:27:55,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:27:55,006 INFO L495 AbstractCegarLoop]: Abstraction has 123 states and 197 transitions. [2023-11-29 02:27:55,006 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.1) internal successors, (101), 10 states have internal predecessors, (101), 3 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 3 states have call predecessors, (88), 3 states have call successors, (88) [2023-11-29 02:27:55,007 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 197 transitions. [2023-11-29 02:27:55,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2023-11-29 02:27:55,014 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:27:55,014 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:27:55,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:27:55,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-29 02:27:55,222 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:27:55,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:27:55,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1590804289, now seen corresponding path program 1 times [2023-11-29 02:27:55,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:27:55,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136338219] [2023-11-29 02:27:55,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:55,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:27:55,302 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:27:55,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [8787685] [2023-11-29 02:27:55,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:55,303 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:27:55,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:27:55,305 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:27:55,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:27:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:27:55,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:27:55,507 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:27:55,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-29 02:27:55,555 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:27:55,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:27:55,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136338219] [2023-11-29 02:27:55,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:27:55,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8787685] [2023-11-29 02:27:55,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8787685] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:27:55,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:27:55,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:27:55,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439363655] [2023-11-29 02:27:55,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:27:55,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:27:55,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:27:55,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:27:55,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:27:55,561 INFO L87 Difference]: Start difference. First operand 123 states and 197 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 02:27:55,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:27:55,850 INFO L93 Difference]: Finished difference Result 347 states and 556 transitions. [2023-11-29 02:27:55,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:27:55,851 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) Word has length 292 [2023-11-29 02:27:55,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:27:55,855 INFO L225 Difference]: With dead ends: 347 [2023-11-29 02:27:55,855 INFO L226 Difference]: Without dead ends: 215 [2023-11-29 02:27:55,857 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 288 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 02:27:55,858 INFO L413 NwaCegarLoop]: 323 mSDtfsCounter, 203 mSDsluCounter, 582 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 905 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:27:55,859 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 905 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:27:55,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2023-11-29 02:27:55,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 124. [2023-11-29 02:27:55,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 73 states have (on average 1.3972602739726028) internal successors, (102), 73 states have internal predecessors, (102), 48 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (48), 48 states have call predecessors, (48), 48 states have call successors, (48) [2023-11-29 02:27:55,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 198 transitions. [2023-11-29 02:27:55,899 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 198 transitions. Word has length 292 [2023-11-29 02:27:55,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:27:55,901 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 198 transitions. [2023-11-29 02:27:55,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 5 states have internal predecessors, (55), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 02:27:55,902 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 198 transitions. [2023-11-29 02:27:55,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2023-11-29 02:27:55,907 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:27:55,908 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:27:55,915 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:27:56,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:27:56,109 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:27:56,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:27:56,110 INFO L85 PathProgramCache]: Analyzing trace with hash 254954487, now seen corresponding path program 1 times [2023-11-29 02:27:56,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:27:56,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241527626] [2023-11-29 02:27:56,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:56,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:27:56,179 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:27:56,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277013826] [2023-11-29 02:27:56,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:56,180 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:27:56,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:27:56,182 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:27:56,190 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:27:56,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:27:56,375 INFO L262 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 02:27:56,384 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:27:56,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-29 02:27:56,419 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:27:56,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:27:56,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241527626] [2023-11-29 02:27:56,420 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:27:56,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277013826] [2023-11-29 02:27:56,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [277013826] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:27:56,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:27:56,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:27:56,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478010876] [2023-11-29 02:27:56,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:27:56,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:27:56,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:27:56,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:27:56,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:27:56,424 INFO L87 Difference]: Start difference. First operand 124 states and 198 transitions. Second operand has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 02:27:56,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:27:56,472 INFO L93 Difference]: Finished difference Result 291 states and 464 transitions. [2023-11-29 02:27:56,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:27:56,473 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) Word has length 293 [2023-11-29 02:27:56,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:27:56,476 INFO L225 Difference]: With dead ends: 291 [2023-11-29 02:27:56,476 INFO L226 Difference]: Without dead ends: 168 [2023-11-29 02:27:56,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 291 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 02:27:56,479 INFO L413 NwaCegarLoop]: 201 mSDtfsCounter, 63 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:27:56,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 383 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:27:56,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2023-11-29 02:27:56,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 165. [2023-11-29 02:27:56,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 109 states have (on average 1.4678899082568808) internal successors, (160), 110 states have internal predecessors, (160), 52 states have call successors, (52), 3 states have call predecessors, (52), 3 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-29 02:27:56,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 264 transitions. [2023-11-29 02:27:56,507 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 264 transitions. Word has length 293 [2023-11-29 02:27:56,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:27:56,509 INFO L495 AbstractCegarLoop]: Abstraction has 165 states and 264 transitions. [2023-11-29 02:27:56,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.666666666666668) internal successors, (56), 3 states have internal predecessors, (56), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 02:27:56,509 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 264 transitions. [2023-11-29 02:27:56,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2023-11-29 02:27:56,515 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:27:56,515 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:27:56,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:27:56,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:27:56,716 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:27:56,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:27:56,716 INFO L85 PathProgramCache]: Analyzing trace with hash -766113867, now seen corresponding path program 1 times [2023-11-29 02:27:56,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:27:56,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319005641] [2023-11-29 02:27:56,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:56,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:27:56,769 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:27:56,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [470124055] [2023-11-29 02:27:56,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:56,770 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:27:56,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:27:56,772 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:27:56,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:27:56,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:27:56,957 INFO L262 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 02:27:56,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:27:57,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 1547 proven. 111 refuted. 0 times theorem prover too weak. 2854 trivial. 0 not checked. [2023-11-29 02:27:57,394 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:27:57,717 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 30 proven. 111 refuted. 0 times theorem prover too weak. 4371 trivial. 0 not checked. [2023-11-29 02:27:57,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:27:57,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319005641] [2023-11-29 02:27:57,717 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:27:57,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470124055] [2023-11-29 02:27:57,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [470124055] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:27:57,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:27:57,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-29 02:27:57,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459515432] [2023-11-29 02:27:57,718 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:27:57,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 02:27:57,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:27:57,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 02:27:57,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 02:27:57,721 INFO L87 Difference]: Start difference. First operand 165 states and 264 transitions. Second operand has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 3 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 3 states have call predecessors, (86), 3 states have call successors, (86) [2023-11-29 02:27:58,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:27:58,512 INFO L93 Difference]: Finished difference Result 492 states and 775 transitions. [2023-11-29 02:27:58,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 02:27:58,513 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 3 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 3 states have call predecessors, (86), 3 states have call successors, (86) Word has length 293 [2023-11-29 02:27:58,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:27:58,518 INFO L225 Difference]: With dead ends: 492 [2023-11-29 02:27:58,518 INFO L226 Difference]: Without dead ends: 328 [2023-11-29 02:27:58,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 595 GetRequests, 577 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:27:58,521 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 278 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 610 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:27:58,522 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [289 Valid, 562 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 610 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:27:58,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2023-11-29 02:27:58,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 211. [2023-11-29 02:27:58,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 154 states have (on average 1.5064935064935066) internal successors, (232), 155 states have internal predecessors, (232), 52 states have call successors, (52), 4 states have call predecessors, (52), 4 states have return successors, (52), 51 states have call predecessors, (52), 52 states have call successors, (52) [2023-11-29 02:27:58,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 336 transitions. [2023-11-29 02:27:58,568 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 336 transitions. Word has length 293 [2023-11-29 02:27:58,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:27:58,570 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 336 transitions. [2023-11-29 02:27:58,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.444444444444445) internal successors, (94), 9 states have internal predecessors, (94), 3 states have call successors, (85), 2 states have call predecessors, (85), 4 states have return successors, (86), 3 states have call predecessors, (86), 3 states have call successors, (86) [2023-11-29 02:27:58,570 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 336 transitions. [2023-11-29 02:27:58,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2023-11-29 02:27:58,576 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:27:58,576 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:27:58,584 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:27:58,777 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:27:58,777 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:27:58,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:27:58,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1283557076, now seen corresponding path program 1 times [2023-11-29 02:27:58,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:27:58,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668199117] [2023-11-29 02:27:58,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:58,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:27:58,828 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:27:58,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1399654246] [2023-11-29 02:27:58,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:27:58,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:27:58,829 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:27:58,830 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:27:58,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:27:59,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:27:59,034 INFO L262 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 02:27:59,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:27:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 1311 proven. 117 refuted. 0 times theorem prover too weak. 3084 trivial. 0 not checked. [2023-11-29 02:27:59,567 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:28:00,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 24 proven. 117 refuted. 0 times theorem prover too weak. 4371 trivial. 0 not checked. [2023-11-29 02:28:00,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:28:00,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668199117] [2023-11-29 02:28:00,038 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:28:00,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399654246] [2023-11-29 02:28:00,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399654246] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:28:00,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:28:00,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2023-11-29 02:28:00,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118468359] [2023-11-29 02:28:00,039 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:28:00,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 02:28:00,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:28:00,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 02:28:00,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:28:00,043 INFO L87 Difference]: Start difference. First operand 211 states and 336 transitions. Second operand has 20 states, 20 states have (on average 4.85) internal successors, (97), 20 states have internal predecessors, (97), 3 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 3 states have call predecessors, (88), 3 states have call successors, (88) [2023-11-29 02:28:02,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:28:02,665 INFO L93 Difference]: Finished difference Result 1249 states and 1991 transitions. [2023-11-29 02:28:02,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-29 02:28:02,666 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.85) internal successors, (97), 20 states have internal predecessors, (97), 3 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 3 states have call predecessors, (88), 3 states have call successors, (88) Word has length 293 [2023-11-29 02:28:02,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:28:02,672 INFO L225 Difference]: With dead ends: 1249 [2023-11-29 02:28:02,672 INFO L226 Difference]: Without dead ends: 1039 [2023-11-29 02:28:02,675 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 635 GetRequests, 570 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1140 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=950, Invalid=3472, Unknown=0, NotChecked=0, Total=4422 [2023-11-29 02:28:02,676 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 1629 mSDsluCounter, 891 mSDsCounter, 0 mSdLazyCounter, 2042 mSolverCounterSat, 542 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1639 SdHoareTripleChecker+Valid, 1084 SdHoareTripleChecker+Invalid, 2584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 542 IncrementalHoareTripleChecker+Valid, 2042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:28:02,676 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1639 Valid, 1084 Invalid, 2584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [542 Valid, 2042 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 02:28:02,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1039 states. [2023-11-29 02:28:02,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1039 to 551. [2023-11-29 02:28:02,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 423 states have (on average 1.5224586288416075) internal successors, (644), 428 states have internal predecessors, (644), 116 states have call successors, (116), 11 states have call predecessors, (116), 11 states have return successors, (116), 111 states have call predecessors, (116), 116 states have call successors, (116) [2023-11-29 02:28:02,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 876 transitions. [2023-11-29 02:28:02,777 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 876 transitions. Word has length 293 [2023-11-29 02:28:02,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:28:02,778 INFO L495 AbstractCegarLoop]: Abstraction has 551 states and 876 transitions. [2023-11-29 02:28:02,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 4.85) internal successors, (97), 20 states have internal predecessors, (97), 3 states have call successors, (87), 2 states have call predecessors, (87), 4 states have return successors, (88), 3 states have call predecessors, (88), 3 states have call successors, (88) [2023-11-29 02:28:02,779 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 876 transitions. [2023-11-29 02:28:02,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-11-29 02:28:02,782 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:28:02,782 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:28:02,789 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-29 02:28:02,982 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:28:02,983 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:28:02,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:28:02,984 INFO L85 PathProgramCache]: Analyzing trace with hash 1287555922, now seen corresponding path program 1 times [2023-11-29 02:28:02,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:28:02,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018082674] [2023-11-29 02:28:02,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:28:02,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:28:03,026 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:28:03,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [532322244] [2023-11-29 02:28:03,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:28:03,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:28:03,028 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:28:03,029 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:28:03,032 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:28:03,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:28:03,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 02:28:03,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:28:04,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 1446 proven. 249 refuted. 0 times theorem prover too weak. 2817 trivial. 0 not checked. [2023-11-29 02:28:04,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:28:04,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 27 proven. 252 refuted. 0 times theorem prover too weak. 4233 trivial. 0 not checked. [2023-11-29 02:28:04,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:28:04,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018082674] [2023-11-29 02:28:04,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:28:04,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532322244] [2023-11-29 02:28:04,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532322244] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:28:04,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:28:04,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-29 02:28:04,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914676981] [2023-11-29 02:28:04,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:28:04,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 02:28:04,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:28:04,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 02:28:04,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:28:04,712 INFO L87 Difference]: Start difference. First operand 551 states and 876 transitions. Second operand has 16 states, 16 states have (on average 6.8125) internal successors, (109), 16 states have internal predecessors, (109), 5 states have call successors, (95), 3 states have call predecessors, (95), 7 states have return successors, (96), 4 states have call predecessors, (96), 5 states have call successors, (96) [2023-11-29 02:28:05,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:28:05,784 INFO L93 Difference]: Finished difference Result 1636 states and 2458 transitions. [2023-11-29 02:28:05,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 02:28:05,785 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 6.8125) internal successors, (109), 16 states have internal predecessors, (109), 5 states have call successors, (95), 3 states have call predecessors, (95), 7 states have return successors, (96), 4 states have call predecessors, (96), 5 states have call successors, (96) Word has length 294 [2023-11-29 02:28:05,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:28:05,795 INFO L225 Difference]: With dead ends: 1636 [2023-11-29 02:28:05,795 INFO L226 Difference]: Without dead ends: 1086 [2023-11-29 02:28:05,797 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 575 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=356, Invalid=834, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 02:28:05,798 INFO L413 NwaCegarLoop]: 140 mSDtfsCounter, 512 mSDsluCounter, 409 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 549 SdHoareTripleChecker+Invalid, 940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:28:05,799 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [515 Valid, 549 Invalid, 940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 02:28:05,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2023-11-29 02:28:05,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 539. [2023-11-29 02:28:05,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 443 states have (on average 1.5056433408577878) internal successors, (667), 448 states have internal predecessors, (667), 78 states have call successors, (78), 17 states have call predecessors, (78), 17 states have return successors, (78), 73 states have call predecessors, (78), 78 states have call successors, (78) [2023-11-29 02:28:05,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 823 transitions. [2023-11-29 02:28:05,862 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 823 transitions. Word has length 294 [2023-11-29 02:28:05,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:28:05,863 INFO L495 AbstractCegarLoop]: Abstraction has 539 states and 823 transitions. [2023-11-29 02:28:05,864 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 6.8125) internal successors, (109), 16 states have internal predecessors, (109), 5 states have call successors, (95), 3 states have call predecessors, (95), 7 states have return successors, (96), 4 states have call predecessors, (96), 5 states have call successors, (96) [2023-11-29 02:28:05,864 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 823 transitions. [2023-11-29 02:28:05,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-11-29 02:28:05,867 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:28:05,868 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:28:05,874 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:28:06,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-29 02:28:06,070 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:28:06,071 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:28:06,071 INFO L85 PathProgramCache]: Analyzing trace with hash -1700842878, now seen corresponding path program 1 times [2023-11-29 02:28:06,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:28:06,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177607794] [2023-11-29 02:28:06,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:28:06,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:28:06,106 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:28:06,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2057487071] [2023-11-29 02:28:06,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:28:06,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:28:06,107 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:28:06,108 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:28:06,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:28:06,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:28:06,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 02:28:06,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:28:07,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 47 proven. 141 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2023-11-29 02:28:07,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:28:07,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 4371 trivial. 0 not checked. [2023-11-29 02:28:07,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:28:07,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177607794] [2023-11-29 02:28:07,762 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:28:07,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2057487071] [2023-11-29 02:28:07,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2057487071] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:28:07,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:28:07,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-29 02:28:07,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5198257] [2023-11-29 02:28:07,763 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:28:07,764 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 02:28:07,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:28:07,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 02:28:07,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2023-11-29 02:28:07,766 INFO L87 Difference]: Start difference. First operand 539 states and 823 transitions. Second operand has 18 states, 17 states have (on average 5.764705882352941) internal successors, (98), 18 states have internal predecessors, (98), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) [2023-11-29 02:28:10,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:28:10,305 INFO L93 Difference]: Finished difference Result 1857 states and 2835 transitions. [2023-11-29 02:28:10,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2023-11-29 02:28:10,307 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.764705882352941) internal successors, (98), 18 states have internal predecessors, (98), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) Word has length 294 [2023-11-29 02:28:10,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:28:10,318 INFO L225 Difference]: With dead ends: 1857 [2023-11-29 02:28:10,318 INFO L226 Difference]: Without dead ends: 1319 [2023-11-29 02:28:10,321 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 616 GetRequests, 575 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=459, Invalid=1347, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 02:28:10,322 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 2051 mSDsluCounter, 1076 mSDsCounter, 0 mSdLazyCounter, 1812 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2098 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 2141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 1812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:28:10,322 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2098 Valid, 1235 Invalid, 2141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 1812 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 02:28:10,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1319 states. [2023-11-29 02:28:10,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1319 to 803. [2023-11-29 02:28:10,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 634 states have (on average 1.476340694006309) internal successors, (936), 641 states have internal predecessors, (936), 140 states have call successors, (140), 28 states have call predecessors, (140), 28 states have return successors, (140), 133 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-29 02:28:10,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 1216 transitions. [2023-11-29 02:28:10,468 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 1216 transitions. Word has length 294 [2023-11-29 02:28:10,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:28:10,468 INFO L495 AbstractCegarLoop]: Abstraction has 803 states and 1216 transitions. [2023-11-29 02:28:10,469 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.764705882352941) internal successors, (98), 18 states have internal predecessors, (98), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) [2023-11-29 02:28:10,469 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 1216 transitions. [2023-11-29 02:28:10,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-11-29 02:28:10,472 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:28:10,472 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:28:10,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-29 02:28:10,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 02:28:10,673 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:28:10,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:28:10,673 INFO L85 PathProgramCache]: Analyzing trace with hash 104595456, now seen corresponding path program 1 times [2023-11-29 02:28:10,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:28:10,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322079389] [2023-11-29 02:28:10,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:28:10,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:28:10,708 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:28:10,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [786008502] [2023-11-29 02:28:10,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:28:10,709 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:28:10,709 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:28:10,710 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:28:10,713 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:28:10,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:28:10,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 02:28:10,968 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:28:11,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 47 proven. 141 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2023-11-29 02:28:11,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:28:12,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 4371 trivial. 0 not checked. [2023-11-29 02:28:12,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:28:12,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322079389] [2023-11-29 02:28:12,512 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:28:12,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786008502] [2023-11-29 02:28:12,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786008502] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:28:12,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:28:12,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-29 02:28:12,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873064319] [2023-11-29 02:28:12,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:28:12,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 02:28:12,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:28:12,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 02:28:12,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:28:12,516 INFO L87 Difference]: Start difference. First operand 803 states and 1216 transitions. Second operand has 16 states, 15 states have (on average 6.4) internal successors, (96), 16 states have internal predecessors, (96), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) [2023-11-29 02:28:15,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:28:15,146 INFO L93 Difference]: Finished difference Result 1676 states and 2555 transitions. [2023-11-29 02:28:15,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 02:28:15,147 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 6.4) internal successors, (96), 16 states have internal predecessors, (96), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) Word has length 294 [2023-11-29 02:28:15,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:28:15,155 INFO L225 Difference]: With dead ends: 1676 [2023-11-29 02:28:15,155 INFO L226 Difference]: Without dead ends: 1134 [2023-11-29 02:28:15,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 612 GetRequests, 578 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=345, Invalid=915, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 02:28:15,158 INFO L413 NwaCegarLoop]: 240 mSDtfsCounter, 1195 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1416 mSolverCounterSat, 878 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1195 SdHoareTripleChecker+Valid, 875 SdHoareTripleChecker+Invalid, 2294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 878 IncrementalHoareTripleChecker+Valid, 1416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:28:15,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1195 Valid, 875 Invalid, 2294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [878 Valid, 1416 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 02:28:15,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1134 states. [2023-11-29 02:28:15,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1134 to 263. [2023-11-29 02:28:15,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 189 states have (on average 1.402116402116402) internal successors, (265), 191 states have internal predecessors, (265), 62 states have call successors, (62), 11 states have call predecessors, (62), 11 states have return successors, (62), 60 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-29 02:28:15,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 389 transitions. [2023-11-29 02:28:15,264 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 389 transitions. Word has length 294 [2023-11-29 02:28:15,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:28:15,265 INFO L495 AbstractCegarLoop]: Abstraction has 263 states and 389 transitions. [2023-11-29 02:28:15,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 6.4) internal successors, (96), 16 states have internal predecessors, (96), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) [2023-11-29 02:28:15,266 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 389 transitions. [2023-11-29 02:28:15,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-11-29 02:28:15,268 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:28:15,268 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:28:15,277 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:28:15,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:28:15,469 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:28:15,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:28:15,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1560294268, now seen corresponding path program 1 times [2023-11-29 02:28:15,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:28:15,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59288898] [2023-11-29 02:28:15,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:28:15,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:28:15,508 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:28:15,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1551451717] [2023-11-29 02:28:15,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:28:15,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:28:15,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:28:15,510 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:28:15,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:28:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:28:15,755 INFO L262 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 02:28:15,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:28:17,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 47 proven. 141 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2023-11-29 02:28:17,225 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:28:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 4371 trivial. 0 not checked. [2023-11-29 02:28:18,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:28:18,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59288898] [2023-11-29 02:28:18,226 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:28:18,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551451717] [2023-11-29 02:28:18,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551451717] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:28:18,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:28:18,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-29 02:28:18,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613453431] [2023-11-29 02:28:18,227 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:28:18,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 02:28:18,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:28:18,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 02:28:18,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-29 02:28:18,229 INFO L87 Difference]: Start difference. First operand 263 states and 389 transitions. Second operand has 18 states, 17 states have (on average 5.764705882352941) internal successors, (98), 18 states have internal predecessors, (98), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) [2023-11-29 02:28:19,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:28:19,980 INFO L93 Difference]: Finished difference Result 756 states and 1147 transitions. [2023-11-29 02:28:19,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:28:19,981 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 5.764705882352941) internal successors, (98), 18 states have internal predecessors, (98), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) Word has length 294 [2023-11-29 02:28:19,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:28:19,986 INFO L225 Difference]: With dead ends: 756 [2023-11-29 02:28:19,986 INFO L226 Difference]: Without dead ends: 525 [2023-11-29 02:28:19,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 602 GetRequests, 572 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=728, Unknown=0, NotChecked=0, Total=992 [2023-11-29 02:28:19,988 INFO L413 NwaCegarLoop]: 118 mSDtfsCounter, 908 mSDsluCounter, 695 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 315 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 955 SdHoareTripleChecker+Valid, 813 SdHoareTripleChecker+Invalid, 1504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 315 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:28:19,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [955 Valid, 813 Invalid, 1504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [315 Valid, 1189 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 02:28:19,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2023-11-29 02:28:20,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 339. [2023-11-29 02:28:20,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 225 states have (on average 1.3466666666666667) internal successors, (303), 226 states have internal predecessors, (303), 100 states have call successors, (100), 13 states have call predecessors, (100), 13 states have return successors, (100), 99 states have call predecessors, (100), 100 states have call successors, (100) [2023-11-29 02:28:20,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 503 transitions. [2023-11-29 02:28:20,134 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 503 transitions. Word has length 294 [2023-11-29 02:28:20,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:28:20,134 INFO L495 AbstractCegarLoop]: Abstraction has 339 states and 503 transitions. [2023-11-29 02:28:20,135 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 5.764705882352941) internal successors, (98), 18 states have internal predecessors, (98), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) [2023-11-29 02:28:20,135 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 503 transitions. [2023-11-29 02:28:20,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-11-29 02:28:20,137 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:28:20,137 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:28:20,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 02:28:20,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:28:20,338 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:28:20,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:28:20,339 INFO L85 PathProgramCache]: Analyzing trace with hash 245144066, now seen corresponding path program 1 times [2023-11-29 02:28:20,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:28:20,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491472115] [2023-11-29 02:28:20,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:28:20,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:28:20,377 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:28:20,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [493849912] [2023-11-29 02:28:20,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:28:20,377 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:28:20,378 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:28:20,379 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:28:20,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:28:20,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:28:20,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 67 conjunts are in the unsatisfiable core [2023-11-29 02:28:20,705 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:29:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 1531 proven. 906 refuted. 0 times theorem prover too weak. 2075 trivial. 0 not checked. [2023-11-29 02:29:07,522 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:29:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-29 02:29:22,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:29:22,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491472115] [2023-11-29 02:29:22,952 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:29:22,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493849912] [2023-11-29 02:29:22,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493849912] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:29:22,952 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:29:22,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [38] total 46 [2023-11-29 02:29:22,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313307701] [2023-11-29 02:29:22,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:29:22,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:29:22,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:29:22,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:29:22,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=424, Invalid=1646, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 02:29:22,956 INFO L87 Difference]: Start difference. First operand 339 states and 503 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 02:29:47,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:29:47,813 INFO L93 Difference]: Finished difference Result 866 states and 1280 transitions. [2023-11-29 02:29:47,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 02:29:47,814 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) Word has length 294 [2023-11-29 02:29:47,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:29:47,818 INFO L225 Difference]: With dead ends: 866 [2023-11-29 02:29:47,818 INFO L226 Difference]: Without dead ends: 635 [2023-11-29 02:29:47,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 543 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 34.8s TimeCoverageRelationStatistics Valid=669, Invalid=3363, Unknown=0, NotChecked=0, Total=4032 [2023-11-29 02:29:47,821 INFO L413 NwaCegarLoop]: 159 mSDtfsCounter, 635 mSDsluCounter, 757 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 916 SdHoareTripleChecker+Invalid, 373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:29:47,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [635 Valid, 916 Invalid, 373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-11-29 02:29:47,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2023-11-29 02:29:47,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 362. [2023-11-29 02:29:47,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 248 states have (on average 1.3709677419354838) internal successors, (340), 249 states have internal predecessors, (340), 100 states have call successors, (100), 13 states have call predecessors, (100), 13 states have return successors, (100), 99 states have call predecessors, (100), 100 states have call successors, (100) [2023-11-29 02:29:48,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 540 transitions. [2023-11-29 02:29:48,002 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 540 transitions. Word has length 294 [2023-11-29 02:29:48,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:29:48,002 INFO L495 AbstractCegarLoop]: Abstraction has 362 states and 540 transitions. [2023-11-29 02:29:48,003 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 02:29:48,003 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 540 transitions. [2023-11-29 02:29:48,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-11-29 02:29:48,006 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:29:48,006 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:29:48,014 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 02:29:48,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 02:29:48,207 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:29:48,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:29:48,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1688914246, now seen corresponding path program 1 times [2023-11-29 02:29:48,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:29:48,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21115978] [2023-11-29 02:29:48,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:29:48,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:29:48,248 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:29:48,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1614497211] [2023-11-29 02:29:48,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:29:48,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:29:48,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:29:48,250 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:29:48,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:29:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:29:48,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:29:48,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:29:48,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-29 02:29:48,500 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:29:48,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:29:48,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21115978] [2023-11-29 02:29:48,501 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:29:48,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614497211] [2023-11-29 02:29:48,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614497211] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:29:48,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:29:48,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:29:48,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214559720] [2023-11-29 02:29:48,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:29:48,502 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:29:48,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:29:48,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:29:48,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:29:48,503 INFO L87 Difference]: Start difference. First operand 362 states and 540 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 02:29:48,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:29:48,695 INFO L93 Difference]: Finished difference Result 629 states and 945 transitions. [2023-11-29 02:29:48,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:29:48,696 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) Word has length 294 [2023-11-29 02:29:48,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:29:48,699 INFO L225 Difference]: With dead ends: 629 [2023-11-29 02:29:48,699 INFO L226 Difference]: Without dead ends: 375 [2023-11-29 02:29:48,701 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 294 GetRequests, 291 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 02:29:48,701 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 162 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:29:48,702 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 503 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:29:48,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2023-11-29 02:29:48,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 372. [2023-11-29 02:29:48,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 258 states have (on average 1.3682170542635659) internal successors, (353), 259 states have internal predecessors, (353), 100 states have call successors, (100), 13 states have call predecessors, (100), 13 states have return successors, (100), 99 states have call predecessors, (100), 100 states have call successors, (100) [2023-11-29 02:29:48,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 553 transitions. [2023-11-29 02:29:48,841 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 553 transitions. Word has length 294 [2023-11-29 02:29:48,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:29:48,842 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 553 transitions. [2023-11-29 02:29:48,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 02:29:48,842 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 553 transitions. [2023-11-29 02:29:48,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-11-29 02:29:48,844 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:29:48,845 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:29:48,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 02:29:49,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:29:49,046 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:29:49,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:29:49,046 INFO L85 PathProgramCache]: Analyzing trace with hash 463998784, now seen corresponding path program 1 times [2023-11-29 02:29:49,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:29:49,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145160732] [2023-11-29 02:29:49,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:29:49,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:29:49,075 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:29:49,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1260197385] [2023-11-29 02:29:49,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:29:49,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:29:49,075 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:29:49,076 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:29:49,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 02:29:49,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:29:49,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 02:29:49,444 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:20,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 96 proven. 276 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2023-11-29 02:30:20,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:30:31,044 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-29 02:30:31,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:31,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145160732] [2023-11-29 02:30:31,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:30:31,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260197385] [2023-11-29 02:30:31,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1260197385] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:30:31,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:30:31,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 23 [2023-11-29 02:30:31,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455766623] [2023-11-29 02:30:31,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:30:31,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:30:31,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:31,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:30:31,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=386, Unknown=0, NotChecked=0, Total=506 [2023-11-29 02:30:31,047 INFO L87 Difference]: Start difference. First operand 372 states and 553 transitions. Second operand has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 02:30:39,372 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [1] [2023-11-29 02:30:48,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:30:48,599 INFO L93 Difference]: Finished difference Result 923 states and 1369 transitions. [2023-11-29 02:30:48,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 02:30:48,600 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) Word has length 294 [2023-11-29 02:30:48,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:30:48,604 INFO L225 Difference]: With dead ends: 923 [2023-11-29 02:30:48,604 INFO L226 Difference]: Without dead ends: 662 [2023-11-29 02:30:48,605 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 565 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 19.4s TimeCoverageRelationStatistics Valid=365, Invalid=1275, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 02:30:48,606 INFO L413 NwaCegarLoop]: 188 mSDtfsCounter, 471 mSDsluCounter, 853 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 471 SdHoareTripleChecker+Valid, 1041 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:30:48,606 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [471 Valid, 1041 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2023-11-29 02:30:48,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 662 states. [2023-11-29 02:30:48,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 662 to 372. [2023-11-29 02:30:48,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 258 states have (on average 1.3682170542635659) internal successors, (353), 259 states have internal predecessors, (353), 100 states have call successors, (100), 13 states have call predecessors, (100), 13 states have return successors, (100), 99 states have call predecessors, (100), 100 states have call successors, (100) [2023-11-29 02:30:48,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 553 transitions. [2023-11-29 02:30:48,705 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 553 transitions. Word has length 294 [2023-11-29 02:30:48,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:30:48,705 INFO L495 AbstractCegarLoop]: Abstraction has 372 states and 553 transitions. [2023-11-29 02:30:48,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.7) internal successors, (57), 10 states have internal predecessors, (57), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 02:30:48,706 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 553 transitions. [2023-11-29 02:30:48,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-11-29 02:30:48,712 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:30:48,712 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:30:48,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 02:30:48,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 02:30:48,913 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:30:48,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:30:48,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1723186523, now seen corresponding path program 1 times [2023-11-29 02:30:48,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:30:48,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349238946] [2023-11-29 02:30:48,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:48,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:30:48,943 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:30:48,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1089969766] [2023-11-29 02:30:48,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:30:48,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:30:48,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:30:48,945 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:30:48,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 02:30:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:30:49,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 02:30:49,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:30:50,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 1352 proven. 228 refuted. 0 times theorem prover too weak. 2932 trivial. 0 not checked. [2023-11-29 02:30:50,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:30:51,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 48 proven. 231 refuted. 0 times theorem prover too weak. 4233 trivial. 0 not checked. [2023-11-29 02:30:51,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:30:51,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349238946] [2023-11-29 02:30:51,958 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:30:51,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089969766] [2023-11-29 02:30:51,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089969766] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:30:51,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:30:51,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 30 [2023-11-29 02:30:51,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80672821] [2023-11-29 02:30:51,958 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:30:51,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-29 02:30:51,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:30:51,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-29 02:30:51,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2023-11-29 02:30:51,961 INFO L87 Difference]: Start difference. First operand 372 states and 553 transitions. Second operand has 30 states, 29 states have (on average 4.310344827586207) internal successors, (125), 28 states have internal predecessors, (125), 6 states have call successors, (96), 4 states have call predecessors, (96), 7 states have return successors, (96), 6 states have call predecessors, (96), 6 states have call successors, (96) [2023-11-29 02:31:01,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:31:01,160 INFO L93 Difference]: Finished difference Result 1682 states and 2415 transitions. [2023-11-29 02:31:01,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2023-11-29 02:31:01,161 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 4.310344827586207) internal successors, (125), 28 states have internal predecessors, (125), 6 states have call successors, (96), 4 states have call predecessors, (96), 7 states have return successors, (96), 6 states have call predecessors, (96), 6 states have call successors, (96) Word has length 295 [2023-11-29 02:31:01,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:31:01,170 INFO L225 Difference]: With dead ends: 1682 [2023-11-29 02:31:01,171 INFO L226 Difference]: Without dead ends: 1421 [2023-11-29 02:31:01,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 681 GetRequests, 577 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3911 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=2104, Invalid=9026, Unknown=0, NotChecked=0, Total=11130 [2023-11-29 02:31:01,177 INFO L413 NwaCegarLoop]: 292 mSDtfsCounter, 1728 mSDsluCounter, 1902 mSDsCounter, 0 mSdLazyCounter, 3890 mSolverCounterSat, 2469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1741 SdHoareTripleChecker+Valid, 2194 SdHoareTripleChecker+Invalid, 6359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2469 IncrementalHoareTripleChecker+Valid, 3890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:31:01,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1741 Valid, 2194 Invalid, 6359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2469 Valid, 3890 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-11-29 02:31:01,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2023-11-29 02:31:01,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 690. [2023-11-29 02:31:01,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 510 states have (on average 1.4137254901960785) internal successors, (721), 515 states have internal predecessors, (721), 152 states have call successors, (152), 27 states have call predecessors, (152), 27 states have return successors, (152), 147 states have call predecessors, (152), 152 states have call successors, (152) [2023-11-29 02:31:01,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 1025 transitions. [2023-11-29 02:31:01,404 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 1025 transitions. Word has length 295 [2023-11-29 02:31:01,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:31:01,404 INFO L495 AbstractCegarLoop]: Abstraction has 690 states and 1025 transitions. [2023-11-29 02:31:01,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 4.310344827586207) internal successors, (125), 28 states have internal predecessors, (125), 6 states have call successors, (96), 4 states have call predecessors, (96), 7 states have return successors, (96), 6 states have call predecessors, (96), 6 states have call successors, (96) [2023-11-29 02:31:01,405 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 1025 transitions. [2023-11-29 02:31:01,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-11-29 02:31:01,406 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:31:01,407 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:31:01,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 02:31:01,607 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 02:31:01,607 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:31:01,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:31:01,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1762434147, now seen corresponding path program 1 times [2023-11-29 02:31:01,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:31:01,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137566343] [2023-11-29 02:31:01,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:31:01,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:31:01,637 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:31:01,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1530195696] [2023-11-29 02:31:01,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:31:01,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:31:01,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:31:01,640 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:31:01,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 02:31:01,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:31:01,965 INFO L262 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 02:31:01,973 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:31:35,571 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 96 proven. 276 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2023-11-29 02:31:35,571 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:31:45,556 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-29 02:31:45,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:31:45,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137566343] [2023-11-29 02:31:45,556 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:31:45,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530195696] [2023-11-29 02:31:45,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530195696] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:31:45,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:31:45,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [17] total 25 [2023-11-29 02:31:45,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136278088] [2023-11-29 02:31:45,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:31:45,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:31:45,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:31:45,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:31:45,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2023-11-29 02:31:45,559 INFO L87 Difference]: Start difference. First operand 690 states and 1025 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 02:31:49,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:31:49,719 INFO L93 Difference]: Finished difference Result 1378 states and 2004 transitions. [2023-11-29 02:31:49,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 02:31:49,720 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) Word has length 295 [2023-11-29 02:31:49,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:31:49,724 INFO L225 Difference]: With dead ends: 1378 [2023-11-29 02:31:49,724 INFO L226 Difference]: Without dead ends: 997 [2023-11-29 02:31:49,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 599 GetRequests, 565 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=257, Invalid=1003, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 02:31:49,726 INFO L413 NwaCegarLoop]: 164 mSDtfsCounter, 510 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 929 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:31:49,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 929 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 02:31:49,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2023-11-29 02:31:49,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 747. [2023-11-29 02:31:49,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 567 states have (on average 1.4426807760141094) internal successors, (818), 572 states have internal predecessors, (818), 152 states have call successors, (152), 27 states have call predecessors, (152), 27 states have return successors, (152), 147 states have call predecessors, (152), 152 states have call successors, (152) [2023-11-29 02:31:49,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1122 transitions. [2023-11-29 02:31:49,911 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1122 transitions. Word has length 295 [2023-11-29 02:31:49,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:31:49,912 INFO L495 AbstractCegarLoop]: Abstraction has 747 states and 1122 transitions. [2023-11-29 02:31:49,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 02:31:49,912 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1122 transitions. [2023-11-29 02:31:49,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-11-29 02:31:49,913 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:31:49,914 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:31:49,920 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 02:31:50,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 02:31:50,114 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:31:50,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:31:50,115 INFO L85 PathProgramCache]: Analyzing trace with hash -43004187, now seen corresponding path program 1 times [2023-11-29 02:31:50,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:31:50,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477569061] [2023-11-29 02:31:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:31:50,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:31:50,145 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:31:50,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1404514234] [2023-11-29 02:31:50,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:31:50,146 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:31:50,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:31:50,147 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:31:50,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 02:31:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:31:50,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 72 conjunts are in the unsatisfiable core [2023-11-29 02:31:50,774 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:32:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 1466 proven. 996 refuted. 0 times theorem prover too weak. 2050 trivial. 0 not checked. [2023-11-29 02:32:37,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:32:50,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-29 02:32:50,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:32:50,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477569061] [2023-11-29 02:32:50,125 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:32:50,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404514234] [2023-11-29 02:32:50,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404514234] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:32:50,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:32:50,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [41] total 50 [2023-11-29 02:32:50,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182430001] [2023-11-29 02:32:50,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:32:50,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 02:32:50,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:32:50,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 02:32:50,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=491, Invalid=1959, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 02:32:50,128 INFO L87 Difference]: Start difference. First operand 747 states and 1122 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 02:33:22,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:22,896 INFO L93 Difference]: Finished difference Result 1812 states and 2676 transitions. [2023-11-29 02:33:22,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 02:33:22,897 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) Word has length 295 [2023-11-29 02:33:22,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:22,903 INFO L225 Difference]: With dead ends: 1812 [2023-11-29 02:33:22,903 INFO L226 Difference]: Without dead ends: 1408 [2023-11-29 02:33:22,906 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 607 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 42.5s TimeCoverageRelationStatistics Valid=764, Invalid=3928, Unknown=0, NotChecked=0, Total=4692 [2023-11-29 02:33:22,907 INFO L413 NwaCegarLoop]: 185 mSDtfsCounter, 481 mSDsluCounter, 962 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 481 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:22,907 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [481 Valid, 1147 Invalid, 548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2023-11-29 02:33:22,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1408 states. [2023-11-29 02:33:23,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1408 to 747. [2023-11-29 02:33:23,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 567 states have (on average 1.4462081128747795) internal successors, (820), 572 states have internal predecessors, (820), 152 states have call successors, (152), 27 states have call predecessors, (152), 27 states have return successors, (152), 147 states have call predecessors, (152), 152 states have call successors, (152) [2023-11-29 02:33:23,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1124 transitions. [2023-11-29 02:33:23,122 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1124 transitions. Word has length 295 [2023-11-29 02:33:23,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:23,122 INFO L495 AbstractCegarLoop]: Abstraction has 747 states and 1124 transitions. [2023-11-29 02:33:23,123 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 11 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 02:33:23,123 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1124 transitions. [2023-11-29 02:33:23,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-11-29 02:33:23,124 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:23,125 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:23,131 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 02:33:23,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 02:33:23,326 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:33:23,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:23,326 INFO L85 PathProgramCache]: Analyzing trace with hash 1747562910, now seen corresponding path program 1 times [2023-11-29 02:33:23,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:23,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894401523] [2023-11-29 02:33:23,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:23,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:23,360 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:33:23,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1895709627] [2023-11-29 02:33:23,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:23,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:23,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:23,362 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:33:23,365 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 02:33:23,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:23,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 663 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 02:33:23,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:33:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 47 proven. 141 refuted. 0 times theorem prover too weak. 4324 trivial. 0 not checked. [2023-11-29 02:33:24,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:33:24,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 4371 trivial. 0 not checked. [2023-11-29 02:33:24,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:24,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894401523] [2023-11-29 02:33:24,847 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:33:24,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895709627] [2023-11-29 02:33:24,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895709627] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:33:24,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:33:24,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2023-11-29 02:33:24,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407837013] [2023-11-29 02:33:24,847 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 02:33:24,848 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 02:33:24,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:24,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 02:33:24,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:33:24,850 INFO L87 Difference]: Start difference. First operand 747 states and 1124 transitions. Second operand has 15 states, 14 states have (on average 6.928571428571429) internal successors, (97), 15 states have internal predecessors, (97), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) [2023-11-29 02:33:26,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:26,068 INFO L93 Difference]: Finished difference Result 1349 states and 2006 transitions. [2023-11-29 02:33:26,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 02:33:26,069 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 6.928571428571429) internal successors, (97), 15 states have internal predecessors, (97), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) Word has length 295 [2023-11-29 02:33:26,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:26,073 INFO L225 Difference]: With dead ends: 1349 [2023-11-29 02:33:26,073 INFO L226 Difference]: Without dead ends: 836 [2023-11-29 02:33:26,074 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 577 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2023-11-29 02:33:26,075 INFO L413 NwaCegarLoop]: 139 mSDtfsCounter, 964 mSDsluCounter, 834 mSDsCounter, 0 mSdLazyCounter, 1140 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 973 SdHoareTripleChecker+Invalid, 1279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 1140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:26,075 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1012 Valid, 973 Invalid, 1279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 1140 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 02:33:26,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 836 states. [2023-11-29 02:33:26,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 836 to 744. [2023-11-29 02:33:26,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 564 states have (on average 1.4450354609929077) internal successors, (815), 569 states have internal predecessors, (815), 152 states have call successors, (152), 27 states have call predecessors, (152), 27 states have return successors, (152), 147 states have call predecessors, (152), 152 states have call successors, (152) [2023-11-29 02:33:26,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 1119 transitions. [2023-11-29 02:33:26,285 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 1119 transitions. Word has length 295 [2023-11-29 02:33:26,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:26,285 INFO L495 AbstractCegarLoop]: Abstraction has 744 states and 1119 transitions. [2023-11-29 02:33:26,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 6.928571428571429) internal successors, (97), 15 states have internal predecessors, (97), 4 states have call successors, (96), 3 states have call predecessors, (96), 4 states have return successors, (96), 2 states have call predecessors, (96), 4 states have call successors, (96) [2023-11-29 02:33:26,286 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 1119 transitions. [2023-11-29 02:33:26,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-11-29 02:33:26,288 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:26,288 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:26,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 02:33:26,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 02:33:26,489 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:33:26,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:26,489 INFO L85 PathProgramCache]: Analyzing trace with hash -940736152, now seen corresponding path program 1 times [2023-11-29 02:33:26,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:26,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976844976] [2023-11-29 02:33:26,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:26,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:26,518 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:33:26,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1169714790] [2023-11-29 02:33:26,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:26,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:26,518 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:26,519 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:33:26,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 02:33:26,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:26,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:33:26,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:33:26,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-29 02:33:26,708 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:33:26,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:26,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976844976] [2023-11-29 02:33:26,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:33:26,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169714790] [2023-11-29 02:33:26,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1169714790] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:33:26,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:33:26,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:33:26,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101123899] [2023-11-29 02:33:26,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:33:26,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:33:26,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:26,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:33:26,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:33:26,710 INFO L87 Difference]: Start difference. First operand 744 states and 1119 transitions. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 02:33:26,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:26,949 INFO L93 Difference]: Finished difference Result 1161 states and 1710 transitions. [2023-11-29 02:33:26,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:33:26,950 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) Word has length 295 [2023-11-29 02:33:26,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:26,953 INFO L225 Difference]: With dead ends: 1161 [2023-11-29 02:33:26,953 INFO L226 Difference]: Without dead ends: 691 [2023-11-29 02:33:26,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 292 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 02:33:26,954 INFO L413 NwaCegarLoop]: 225 mSDtfsCounter, 117 mSDsluCounter, 300 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 525 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:26,954 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 525 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:33:26,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2023-11-29 02:33:27,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 597. [2023-11-29 02:33:27,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 431 states have (on average 1.3874709976798143) internal successors, (598), 433 states have internal predecessors, (598), 140 states have call successors, (140), 25 states have call predecessors, (140), 25 states have return successors, (140), 138 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-29 02:33:27,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 878 transitions. [2023-11-29 02:33:27,154 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 878 transitions. Word has length 295 [2023-11-29 02:33:27,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:27,154 INFO L495 AbstractCegarLoop]: Abstraction has 597 states and 878 transitions. [2023-11-29 02:33:27,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 02:33:27,154 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 878 transitions. [2023-11-29 02:33:27,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-11-29 02:33:27,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:27,157 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:27,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-29 02:33:27,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 02:33:27,358 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:33:27,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:27,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1070313576, now seen corresponding path program 1 times [2023-11-29 02:33:27,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:27,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674213620] [2023-11-29 02:33:27,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:27,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:27,384 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:33:27,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1850566706] [2023-11-29 02:33:27,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:27,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:27,385 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:27,386 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:33:27,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 02:33:27,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:27,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 02:33:27,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:33:31,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 1347 proven. 381 refuted. 0 times theorem prover too weak. 2784 trivial. 0 not checked. [2023-11-29 02:33:31,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:33:39,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-29 02:33:39,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:39,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674213620] [2023-11-29 02:33:39,630 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:33:39,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850566706] [2023-11-29 02:33:39,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850566706] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:33:39,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:33:39,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 26 [2023-11-29 02:33:39,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017381263] [2023-11-29 02:33:39,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:33:39,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:33:39,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:39,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:33:39,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-29 02:33:39,632 INFO L87 Difference]: Start difference. First operand 597 states and 878 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 02:33:41,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:41,659 INFO L93 Difference]: Finished difference Result 967 states and 1419 transitions. [2023-11-29 02:33:41,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:33:41,660 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) Word has length 295 [2023-11-29 02:33:41,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:41,664 INFO L225 Difference]: With dead ends: 967 [2023-11-29 02:33:41,664 INFO L226 Difference]: Without dead ends: 704 [2023-11-29 02:33:41,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 02:33:41,666 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 472 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:41,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [472 Valid, 807 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 02:33:41,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2023-11-29 02:33:41,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 646. [2023-11-29 02:33:41,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 480 states have (on average 1.4125) internal successors, (678), 482 states have internal predecessors, (678), 140 states have call successors, (140), 25 states have call predecessors, (140), 25 states have return successors, (140), 138 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-29 02:33:41,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 958 transitions. [2023-11-29 02:33:41,833 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 958 transitions. Word has length 295 [2023-11-29 02:33:41,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:41,834 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 958 transitions. [2023-11-29 02:33:41,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 02:33:41,834 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 958 transitions. [2023-11-29 02:33:41,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-11-29 02:33:41,836 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:41,836 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:41,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 02:33:42,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 02:33:42,037 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:33:42,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:42,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1809602524, now seen corresponding path program 1 times [2023-11-29 02:33:42,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:42,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656609672] [2023-11-29 02:33:42,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:42,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:42,065 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:33:42,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2042386259] [2023-11-29 02:33:42,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:42,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:42,066 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:42,067 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:33:42,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 02:33:42,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:42,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 02:33:42,271 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:33:48,536 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 325 proven. 402 refuted. 0 times theorem prover too weak. 3785 trivial. 0 not checked. [2023-11-29 02:33:48,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:33:57,127 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-29 02:33:57,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:57,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656609672] [2023-11-29 02:33:57,127 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:33:57,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042386259] [2023-11-29 02:33:57,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042386259] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:33:57,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:33:57,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 26 [2023-11-29 02:33:57,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378675086] [2023-11-29 02:33:57,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:33:57,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:33:57,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:57,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:33:57,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-29 02:33:57,130 INFO L87 Difference]: Start difference. First operand 646 states and 958 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 02:33:58,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:58,970 INFO L93 Difference]: Finished difference Result 1222 states and 1802 transitions. [2023-11-29 02:33:58,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:33:58,971 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) Word has length 295 [2023-11-29 02:33:58,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:58,975 INFO L225 Difference]: With dead ends: 1222 [2023-11-29 02:33:58,975 INFO L226 Difference]: Without dead ends: 852 [2023-11-29 02:33:58,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=277, Invalid=983, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 02:33:58,977 INFO L413 NwaCegarLoop]: 227 mSDtfsCounter, 478 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:58,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [478 Valid, 854 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 02:33:58,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2023-11-29 02:33:59,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 652. [2023-11-29 02:33:59,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 652 states, 486 states have (on average 1.4074074074074074) internal successors, (684), 488 states have internal predecessors, (684), 140 states have call successors, (140), 25 states have call predecessors, (140), 25 states have return successors, (140), 138 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-29 02:33:59,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 652 states to 652 states and 964 transitions. [2023-11-29 02:33:59,159 INFO L78 Accepts]: Start accepts. Automaton has 652 states and 964 transitions. Word has length 295 [2023-11-29 02:33:59,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:59,160 INFO L495 AbstractCegarLoop]: Abstraction has 652 states and 964 transitions. [2023-11-29 02:33:59,160 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 02:33:59,160 INFO L276 IsEmpty]: Start isEmpty. Operand 652 states and 964 transitions. [2023-11-29 02:33:59,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-11-29 02:33:59,162 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:59,162 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:33:59,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 02:33:59,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:59,363 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:33:59,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:59,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1289168294, now seen corresponding path program 1 times [2023-11-29 02:33:59,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:59,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087839448] [2023-11-29 02:33:59,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:59,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:59,394 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:33:59,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [660427498] [2023-11-29 02:33:59,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:59,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:59,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:59,395 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:33:59,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 02:33:59,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:59,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 02:33:59,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:34:03,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 1347 proven. 381 refuted. 0 times theorem prover too weak. 2784 trivial. 0 not checked. [2023-11-29 02:34:03,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:34:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-29 02:34:12,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:34:12,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087839448] [2023-11-29 02:34:12,911 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:34:12,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660427498] [2023-11-29 02:34:12,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660427498] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:34:12,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:34:12,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 26 [2023-11-29 02:34:12,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089778833] [2023-11-29 02:34:12,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:34:12,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:34:12,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:34:12,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:34:12,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-29 02:34:12,913 INFO L87 Difference]: Start difference. First operand 652 states and 964 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 02:34:14,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:34:14,918 INFO L93 Difference]: Finished difference Result 1001 states and 1467 transitions. [2023-11-29 02:34:14,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:34:14,919 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) Word has length 295 [2023-11-29 02:34:14,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:34:14,922 INFO L225 Difference]: With dead ends: 1001 [2023-11-29 02:34:14,922 INFO L226 Difference]: Without dead ends: 710 [2023-11-29 02:34:14,923 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 02:34:14,923 INFO L413 NwaCegarLoop]: 186 mSDtfsCounter, 414 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 268 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 414 SdHoareTripleChecker+Valid, 840 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:34:14,924 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [414 Valid, 840 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 268 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 02:34:14,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2023-11-29 02:34:15,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 634. [2023-11-29 02:34:15,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 468 states have (on average 1.393162393162393) internal successors, (652), 470 states have internal predecessors, (652), 140 states have call successors, (140), 25 states have call predecessors, (140), 25 states have return successors, (140), 138 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-29 02:34:15,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 932 transitions. [2023-11-29 02:34:15,094 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 932 transitions. Word has length 295 [2023-11-29 02:34:15,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:34:15,094 INFO L495 AbstractCegarLoop]: Abstraction has 634 states and 932 transitions. [2023-11-29 02:34:15,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 02:34:15,095 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 932 transitions. [2023-11-29 02:34:15,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-11-29 02:34:15,096 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:34:15,096 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:15,103 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-29 02:34:15,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:34:15,297 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:34:15,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:34:15,297 INFO L85 PathProgramCache]: Analyzing trace with hash 2028457242, now seen corresponding path program 1 times [2023-11-29 02:34:15,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:34:15,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865106378] [2023-11-29 02:34:15,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:34:15,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:34:15,328 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:34:15,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2000639109] [2023-11-29 02:34:15,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:34:15,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:34:15,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:34:15,330 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:34:15,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 02:34:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:34:15,558 INFO L262 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 02:34:15,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:34:21,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 325 proven. 402 refuted. 0 times theorem prover too weak. 3785 trivial. 0 not checked. [2023-11-29 02:34:21,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:34:30,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-29 02:34:30,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:34:30,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865106378] [2023-11-29 02:34:30,459 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:34:30,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000639109] [2023-11-29 02:34:30,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000639109] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:34:30,459 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:34:30,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 26 [2023-11-29 02:34:30,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441536643] [2023-11-29 02:34:30,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:34:30,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 02:34:30,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:34:30,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 02:34:30,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-29 02:34:30,461 INFO L87 Difference]: Start difference. First operand 634 states and 932 transitions. Second operand has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 02:34:32,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:34:32,389 INFO L93 Difference]: Finished difference Result 1228 states and 1804 transitions. [2023-11-29 02:34:32,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:34:32,390 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) Word has length 295 [2023-11-29 02:34:32,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:34:32,394 INFO L225 Difference]: With dead ends: 1228 [2023-11-29 02:34:32,394 INFO L226 Difference]: Without dead ends: 852 [2023-11-29 02:34:32,395 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=277, Invalid=983, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 02:34:32,396 INFO L413 NwaCegarLoop]: 256 mSDtfsCounter, 337 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 317 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:34:32,396 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 1016 Invalid, 317 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 02:34:32,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 852 states. [2023-11-29 02:34:32,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 852 to 602. [2023-11-29 02:34:32,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 436 states have (on average 1.3738532110091743) internal successors, (599), 438 states have internal predecessors, (599), 140 states have call successors, (140), 25 states have call predecessors, (140), 25 states have return successors, (140), 138 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-29 02:34:32,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 879 transitions. [2023-11-29 02:34:32,568 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 879 transitions. Word has length 295 [2023-11-29 02:34:32,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:34:32,568 INFO L495 AbstractCegarLoop]: Abstraction has 602 states and 879 transitions. [2023-11-29 02:34:32,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.8) internal successors, (58), 10 states have internal predecessors, (58), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 02:34:32,569 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 879 transitions. [2023-11-29 02:34:32,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-11-29 02:34:32,570 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:34:32,570 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:34:32,577 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 02:34:32,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2023-11-29 02:34:32,771 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:34:32,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:34:32,772 INFO L85 PathProgramCache]: Analyzing trace with hash -714424565, now seen corresponding path program 1 times [2023-11-29 02:34:32,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:34:32,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732548168] [2023-11-29 02:34:32,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:34:32,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:34:32,804 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:34:32,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1533312707] [2023-11-29 02:34:32,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:34:32,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:34:32,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:34:32,806 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:34:32,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 02:34:33,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:34:33,068 INFO L262 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 02:34:33,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:34:54,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 96 proven. 276 refuted. 0 times theorem prover too weak. 4140 trivial. 0 not checked. [2023-11-29 02:34:54,459 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:35:04,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4512 trivial. 0 not checked. [2023-11-29 02:35:04,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:04,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732548168] [2023-11-29 02:35:04,708 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 02:35:04,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533312707] [2023-11-29 02:35:04,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533312707] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:35:04,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:35:04,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [18] total 27 [2023-11-29 02:35:04,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271512800] [2023-11-29 02:35:04,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:35:04,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 02:35:04,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:04,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 02:35:04,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2023-11-29 02:35:04,710 INFO L87 Difference]: Start difference. First operand 602 states and 879 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 02:35:07,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:07,675 INFO L93 Difference]: Finished difference Result 1241 states and 1792 transitions. [2023-11-29 02:35:07,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:35:07,676 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) Word has length 296 [2023-11-29 02:35:07,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:07,680 INFO L225 Difference]: With dead ends: 1241 [2023-11-29 02:35:07,681 INFO L226 Difference]: Without dead ends: 868 [2023-11-29 02:35:07,682 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 601 GetRequests, 566 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=292, Invalid=1040, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 02:35:07,683 INFO L413 NwaCegarLoop]: 150 mSDtfsCounter, 805 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 255 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 805 SdHoareTripleChecker+Valid, 747 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:07,683 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [805 Valid, 747 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 255 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 02:35:07,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 868 states. [2023-11-29 02:35:07,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 868 to 540. [2023-11-29 02:35:07,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 374 states have (on average 1.3262032085561497) internal successors, (496), 376 states have internal predecessors, (496), 140 states have call successors, (140), 25 states have call predecessors, (140), 25 states have return successors, (140), 138 states have call predecessors, (140), 140 states have call successors, (140) [2023-11-29 02:35:07,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 776 transitions. [2023-11-29 02:35:07,857 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 776 transitions. Word has length 296 [2023-11-29 02:35:07,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:07,857 INFO L495 AbstractCegarLoop]: Abstraction has 540 states and 776 transitions. [2023-11-29 02:35:07,857 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 1 states have call successors, (48), 1 states have call predecessors, (48), 1 states have return successors, (48), 1 states have call predecessors, (48), 1 states have call successors, (48) [2023-11-29 02:35:07,857 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 776 transitions. [2023-11-29 02:35:07,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2023-11-29 02:35:07,859 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:07,859 INFO L195 NwaCegarLoop]: trace histogram [48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 02:35:07,864 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 02:35:08,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 02:35:08,060 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 02:35:08,060 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:08,060 INFO L85 PathProgramCache]: Analyzing trace with hash -1801352162, now seen corresponding path program 1 times [2023-11-29 02:35:08,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:08,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376868605] [2023-11-29 02:35:08,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:08,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:08,086 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 02:35:08,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2110808024] [2023-11-29 02:35:08,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:08,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:08,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:08,088 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:35:08,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d3cc1700-20bf-4598-85c0-efe0884d2824/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 02:35:08,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:08,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 669 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 02:35:08,259 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:36:45,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 1229 proven. 252 refuted. 0 times theorem prover too weak. 3031 trivial. 0 not checked. [2023-11-29 02:36:45,692 INFO L327 TraceCheckSpWp]: Computing backward predicates...