./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-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_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/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_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerReach.xml -i ../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-co_file-81.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/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_9f3caf0f-69ec-4551-b777-0017dc775dc9/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 efef9fe37e22accb878733580a57fa075eb75a906afbc039a6b0766829c26689 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:21:35,057 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:21:35,134 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-29 00:21:35,139 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:21:35,140 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:21:35,170 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:21:35,171 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:21:35,172 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:21:35,172 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:21:35,173 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:21:35,173 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:21:35,174 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:21:35,175 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:21:35,176 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:21:35,176 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:21:35,177 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:21:35,177 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-29 00:21:35,178 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:21:35,179 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:21:35,179 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:21:35,180 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:21:35,180 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-29 00:21:35,181 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:21:35,181 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-29 00:21:35,182 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:21:35,182 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-29 00:21:35,183 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:21:35,183 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:21:35,184 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:21:35,185 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:21:35,185 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:21:35,186 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:21:35,186 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:21:35,187 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:21:35,187 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-29 00:21:35,188 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:21:35,188 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:21:35,189 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:21:35,189 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:21:35,189 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-29 00:21:35,190 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:21:35,190 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:21:35,190 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_9f3caf0f-69ec-4551-b777-0017dc775dc9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> efef9fe37e22accb878733580a57fa075eb75a906afbc039a6b0766829c26689 [2023-11-29 00:21:35,472 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:21:35,495 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:21:35,497 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:21:35,499 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:21:35,499 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:21:35,500 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-co_file-81.i [2023-11-29 00:21:38,646 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:21:38,868 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:21:38,869 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-co_file-81.i [2023-11-29 00:21:38,881 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/data/c998e2cd8/05942c9f5ac449169506ae8390333412/FLAGffa9de626 [2023-11-29 00:21:38,895 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/data/c998e2cd8/05942c9f5ac449169506ae8390333412 [2023-11-29 00:21:38,897 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:21:38,899 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:21:38,901 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:21:38,901 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:21:38,906 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:21:38,907 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:21:38" (1/1) ... [2023-11-29 00:21:38,908 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2c087d9e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:38, skipping insertion in model container [2023-11-29 00:21:38,909 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:21:38" (1/1) ... [2023-11-29 00:21:38,944 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:21:39,084 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_9f3caf0f-69ec-4551-b777-0017dc775dc9/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-co_file-81.i[919,932] [2023-11-29 00:21:39,183 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:21:39,200 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:21:39,212 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_9f3caf0f-69ec-4551-b777-0017dc775dc9/sv-benchmarks/c/hardness-nfm22/hardness_fillercode_fillercodestructure_filler-ps-co_file-81.i[919,932] [2023-11-29 00:21:39,264 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:21:39,287 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:21:39,287 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:39 WrapperNode [2023-11-29 00:21:39,287 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:21:39,289 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:21:39,289 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:21:39,289 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:21:39,296 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:39" (1/1) ... [2023-11-29 00:21:39,312 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:39" (1/1) ... [2023-11-29 00:21:39,362 INFO L138 Inliner]: procedures = 26, calls = 61, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 307 [2023-11-29 00:21:39,362 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:21:39,363 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:21:39,364 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:21:39,364 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:21:39,378 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:39" (1/1) ... [2023-11-29 00:21:39,379 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:39" (1/1) ... [2023-11-29 00:21:39,386 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:39" (1/1) ... [2023-11-29 00:21:39,415 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 00:21:39,416 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:39" (1/1) ... [2023-11-29 00:21:39,416 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:39" (1/1) ... [2023-11-29 00:21:39,439 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:39" (1/1) ... [2023-11-29 00:21:39,445 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:39" (1/1) ... [2023-11-29 00:21:39,453 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:39" (1/1) ... [2023-11-29 00:21:39,457 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:39" (1/1) ... [2023-11-29 00:21:39,466 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:21:39,467 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:21:39,467 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:21:39,468 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:21:39,468 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:39" (1/1) ... [2023-11-29 00:21:39,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:21:39,486 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:39,501 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:21:39,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:21:39,541 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 00:21:39,542 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-29 00:21:39,542 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-29 00:21:39,542 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 00:21:39,542 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:21:39,543 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:21:39,638 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:21:39,641 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:21:40,206 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:21:40,250 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:21:40,250 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-29 00:21:40,251 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:21:40 BoogieIcfgContainer [2023-11-29 00:21:40,251 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:21:40,255 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:21:40,255 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:21:40,259 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:21:40,259 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:21:38" (1/3) ... [2023-11-29 00:21:40,260 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5911cc2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:21:40, skipping insertion in model container [2023-11-29 00:21:40,260 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:21:39" (2/3) ... [2023-11-29 00:21:40,260 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5911cc2e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:21:40, skipping insertion in model container [2023-11-29 00:21:40,261 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:21:40" (3/3) ... [2023-11-29 00:21:40,262 INFO L112 eAbstractionObserver]: Analyzing ICFG hardness_fillercode_fillercodestructure_filler-ps-co_file-81.i [2023-11-29 00:21:40,281 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:21:40,282 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-29 00:21:40,334 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:21:40,341 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;@21a1f70b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:21:40,341 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-29 00:21:40,346 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 00:21:40,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2023-11-29 00:21:40,368 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:40,369 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 00:21:40,369 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:40,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:40,375 INFO L85 PathProgramCache]: Analyzing trace with hash 186748594, now seen corresponding path program 1 times [2023-11-29 00:21:40,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:40,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521697165] [2023-11-29 00:21:40,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:40,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:40,637 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:40,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [163130321] [2023-11-29 00:21:40,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:40,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:40,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:40,645 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:40,650 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:21:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:40,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 656 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:21:40,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:41,640 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 00:21:41,641 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:21:41,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:41,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521697165] [2023-11-29 00:21:41,642 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:41,642 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163130321] [2023-11-29 00:21:41,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [163130321] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:21:41,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:21:41,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:21:41,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299741385] [2023-11-29 00:21:41,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:21:41,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:21:41,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:41,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:21:41,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:21:41,689 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 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 00:21:41,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:41,805 INFO L93 Difference]: Finished difference Result 343 states and 670 transitions. [2023-11-29 00:21:41,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:21:41,809 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 291 [2023-11-29 00:21:41,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:41,826 INFO L225 Difference]: With dead ends: 343 [2023-11-29 00:21:41,826 INFO L226 Difference]: Without dead ends: 223 [2023-11-29 00:21:41,833 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 289 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 00:21:41,838 INFO L413 NwaCegarLoop]: 189 mSDtfsCounter, 39 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 17 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 17 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:41,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 372 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 17 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:21:41,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2023-11-29 00:21:41,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 209. [2023-11-29 00:21:41,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 110 states have (on average 1.3545454545454545) internal successors, (149), 110 states have internal predecessors, (149), 96 states have call successors, (96), 2 states have call predecessors, (96), 2 states have return successors, (96), 96 states have call predecessors, (96), 96 states have call successors, (96) [2023-11-29 00:21:41,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 341 transitions. [2023-11-29 00:21:41,950 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 341 transitions. Word has length 291 [2023-11-29 00:21:41,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:41,952 INFO L495 AbstractCegarLoop]: Abstraction has 209 states and 341 transitions. [2023-11-29 00:21:41,953 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 2 states have internal predecessors, (54), 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 00:21:41,953 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 341 transitions. [2023-11-29 00:21:41,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2023-11-29 00:21:41,962 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:41,962 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 00:21:41,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:21:42,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:42,164 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:42,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:42,165 INFO L85 PathProgramCache]: Analyzing trace with hash -464564611, now seen corresponding path program 1 times [2023-11-29 00:21:42,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:42,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510340119] [2023-11-29 00:21:42,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:42,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:42,248 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:42,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [855731660] [2023-11-29 00:21:42,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:42,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:42,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:42,251 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:42,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:21:42,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:42,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:21:42,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:43,833 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 00:21:43,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:21:44,590 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 00:21:44,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:44,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510340119] [2023-11-29 00:21:44,590 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:44,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855731660] [2023-11-29 00:21:44,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855731660] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:21:44,591 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:21:44,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2023-11-29 00:21:44,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349177878] [2023-11-29 00:21:44,592 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:21:44,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:21:44,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:44,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:21:44,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:21:44,597 INFO L87 Difference]: Start difference. First operand 209 states and 341 transitions. Second operand has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 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 00:21:45,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:45,927 INFO L93 Difference]: Finished difference Result 441 states and 677 transitions. [2023-11-29 00:21:45,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 00:21:45,928 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 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 292 [2023-11-29 00:21:45,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:45,935 INFO L225 Difference]: With dead ends: 441 [2023-11-29 00:21:45,935 INFO L226 Difference]: Without dead ends: 323 [2023-11-29 00:21:45,938 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 604 GetRequests, 571 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=356, Invalid=834, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 00:21:45,940 INFO L413 NwaCegarLoop]: 148 mSDtfsCounter, 432 mSDsluCounter, 413 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 435 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:45,941 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [435 Valid, 561 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 00:21:45,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2023-11-29 00:21:45,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 268. [2023-11-29 00:21:45,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 152 states have (on average 1.2960526315789473) internal successors, (197), 153 states have internal predecessors, (197), 106 states have call successors, (106), 9 states have call predecessors, (106), 9 states have return successors, (106), 105 states have call predecessors, (106), 106 states have call successors, (106) [2023-11-29 00:21:45,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 409 transitions. [2023-11-29 00:21:45,995 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 409 transitions. Word has length 292 [2023-11-29 00:21:45,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:45,997 INFO L495 AbstractCegarLoop]: Abstraction has 268 states and 409 transitions. [2023-11-29 00:21:45,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 7.3125) internal successors, (117), 16 states have internal predecessors, (117), 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 00:21:45,998 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 409 transitions. [2023-11-29 00:21:46,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2023-11-29 00:21:46,003 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:46,004 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 00:21:46,010 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:21:46,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:46,205 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:46,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:46,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1858025252, now seen corresponding path program 1 times [2023-11-29 00:21:46,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:46,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477220857] [2023-11-29 00:21:46,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:46,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:46,268 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:46,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1051887678] [2023-11-29 00:21:46,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:46,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:46,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:46,271 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:46,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:21:46,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:46,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 00:21:46,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:47,600 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 00:21:47,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:21:48,055 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 00:21:48,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:48,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477220857] [2023-11-29 00:21:48,055 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:48,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051887678] [2023-11-29 00:21:48,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051887678] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:21:48,056 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:21:48,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 17 [2023-11-29 00:21:48,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632805089] [2023-11-29 00:21:48,057 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:21:48,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 00:21:48,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:48,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 00:21:48,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2023-11-29 00:21:48,060 INFO L87 Difference]: Start difference. First operand 268 states and 409 transitions. Second operand has 17 states, 17 states have (on average 6.882352941176471) internal successors, (117), 17 states have internal predecessors, (117), 4 states have call successors, (94), 3 states have call predecessors, (94), 6 states have return successors, (95), 4 states have call predecessors, (95), 4 states have call successors, (95) [2023-11-29 00:21:50,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:50,090 INFO L93 Difference]: Finished difference Result 634 states and 932 transitions. [2023-11-29 00:21:50,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-29 00:21:50,091 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 6.882352941176471) internal successors, (117), 17 states have internal predecessors, (117), 4 states have call successors, (94), 3 states have call predecessors, (94), 6 states have return successors, (95), 4 states have call predecessors, (95), 4 states have call successors, (95) Word has length 293 [2023-11-29 00:21:50,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:50,097 INFO L225 Difference]: With dead ends: 634 [2023-11-29 00:21:50,097 INFO L226 Difference]: Without dead ends: 469 [2023-11-29 00:21:50,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 623 GetRequests, 572 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=599, Invalid=2157, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 00:21:50,100 INFO L413 NwaCegarLoop]: 224 mSDtfsCounter, 544 mSDsluCounter, 798 mSDsCounter, 0 mSdLazyCounter, 1380 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 546 SdHoareTripleChecker+Valid, 1022 SdHoareTripleChecker+Invalid, 1764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 1380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:50,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [546 Valid, 1022 Invalid, 1764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 1380 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 00:21:50,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2023-11-29 00:21:50,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 352. [2023-11-29 00:21:50,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 211 states have (on average 1.2132701421800949) internal successors, (256), 213 states have internal predecessors, (256), 117 states have call successors, (117), 23 states have call predecessors, (117), 23 states have return successors, (117), 115 states have call predecessors, (117), 117 states have call successors, (117) [2023-11-29 00:21:50,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 490 transitions. [2023-11-29 00:21:50,173 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 490 transitions. Word has length 293 [2023-11-29 00:21:50,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:50,175 INFO L495 AbstractCegarLoop]: Abstraction has 352 states and 490 transitions. [2023-11-29 00:21:50,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 6.882352941176471) internal successors, (117), 17 states have internal predecessors, (117), 4 states have call successors, (94), 3 states have call predecessors, (94), 6 states have return successors, (95), 4 states have call predecessors, (95), 4 states have call successors, (95) [2023-11-29 00:21:50,176 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 490 transitions. [2023-11-29 00:21:50,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-11-29 00:21:50,182 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:50,182 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 00:21:50,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-29 00:21:50,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:50,384 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:50,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:50,385 INFO L85 PathProgramCache]: Analyzing trace with hash -123084992, now seen corresponding path program 1 times [2023-11-29 00:21:50,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:50,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429411679] [2023-11-29 00:21:50,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:50,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:50,446 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:50,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1211676457] [2023-11-29 00:21:50,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:50,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:50,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:50,448 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:50,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:21:50,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:50,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 2 conjunts are in the unsatisfiable core [2023-11-29 00:21:50,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:50,651 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 00:21:50,651 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:21:50,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:50,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429411679] [2023-11-29 00:21:50,652 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:50,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211676457] [2023-11-29 00:21:50,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211676457] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:21:50,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:21:50,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:21:50,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975460293] [2023-11-29 00:21:50,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:21:50,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:21:50,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:50,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:21:50,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:21:50,656 INFO L87 Difference]: Start difference. First operand 352 states and 490 transitions. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 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 00:21:50,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:50,719 INFO L93 Difference]: Finished difference Result 683 states and 922 transitions. [2023-11-29 00:21:50,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:21:50,719 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 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 00:21:50,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:50,723 INFO L225 Difference]: With dead ends: 683 [2023-11-29 00:21:50,723 INFO L226 Difference]: Without dead ends: 446 [2023-11-29 00:21:50,725 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 292 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 00:21:50,726 INFO L413 NwaCegarLoop]: 198 mSDtfsCounter, 27 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 377 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 00:21:50,726 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 377 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:21:50,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2023-11-29 00:21:50,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 441. [2023-11-29 00:21:50,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 279 states have (on average 1.189964157706093) internal successors, (332), 284 states have internal predecessors, (332), 129 states have call successors, (129), 32 states have call predecessors, (129), 32 states have return successors, (129), 124 states have call predecessors, (129), 129 states have call successors, (129) [2023-11-29 00:21:50,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 590 transitions. [2023-11-29 00:21:50,783 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 590 transitions. Word has length 294 [2023-11-29 00:21:50,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:50,784 INFO L495 AbstractCegarLoop]: Abstraction has 441 states and 590 transitions. [2023-11-29 00:21:50,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 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 00:21:50,784 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 590 transitions. [2023-11-29 00:21:50,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2023-11-29 00:21:50,787 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:50,787 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 00:21:50,793 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:21:50,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:50,989 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:50,989 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:50,989 INFO L85 PathProgramCache]: Analyzing trace with hash -65826690, now seen corresponding path program 1 times [2023-11-29 00:21:50,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:50,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857151598] [2023-11-29 00:21:50,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:50,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:51,031 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:51,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1148263127] [2023-11-29 00:21:51,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:51,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:51,032 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:51,033 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:51,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:21:51,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:51,233 INFO L262 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 00:21:51,241 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:51,550 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 00:21:51,550 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:21:51,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:51,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857151598] [2023-11-29 00:21:51,550 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:51,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148263127] [2023-11-29 00:21:51,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148263127] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:21:51,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:21:51,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:21:51,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437011315] [2023-11-29 00:21:51,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:21:51,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:21:51,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:51,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:21:51,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:21:51,554 INFO L87 Difference]: Start difference. First operand 441 states and 590 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 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 00:21:51,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:51,794 INFO L93 Difference]: Finished difference Result 781 states and 1040 transitions. [2023-11-29 00:21:51,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:21:51,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 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 00:21:51,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:51,799 INFO L225 Difference]: With dead ends: 781 [2023-11-29 00:21:51,799 INFO L226 Difference]: Without dead ends: 452 [2023-11-29 00:21:51,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:21:51,801 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 32 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:51,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 446 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:21:51,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2023-11-29 00:21:51,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 442. [2023-11-29 00:21:51,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 280 states have (on average 1.1892857142857143) internal successors, (333), 285 states have internal predecessors, (333), 129 states have call successors, (129), 32 states have call predecessors, (129), 32 states have return successors, (129), 124 states have call predecessors, (129), 129 states have call successors, (129) [2023-11-29 00:21:51,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 591 transitions. [2023-11-29 00:21:51,887 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 591 transitions. Word has length 294 [2023-11-29 00:21:51,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:51,888 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 591 transitions. [2023-11-29 00:21:51,888 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 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 00:21:51,888 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 591 transitions. [2023-11-29 00:21:51,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-11-29 00:21:51,891 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:51,891 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 00:21:51,897 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:21:52,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:52,092 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:52,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:52,093 INFO L85 PathProgramCache]: Analyzing trace with hash -156426639, now seen corresponding path program 1 times [2023-11-29 00:21:52,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:52,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695026963] [2023-11-29 00:21:52,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:52,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:52,136 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:52,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [537280653] [2023-11-29 00:21:52,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:52,136 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:52,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:52,138 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:52,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:21:52,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:52,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:21:52,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:21:53,318 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 00:21:53,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:21:54,219 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 00:21:54,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:21:54,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695026963] [2023-11-29 00:21:54,220 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:21:54,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537280653] [2023-11-29 00:21:54,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537280653] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:21:54,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:21:54,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2023-11-29 00:21:54,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710834118] [2023-11-29 00:21:54,221 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:21:54,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 00:21:54,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:21:54,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 00:21:54,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-11-29 00:21:54,224 INFO L87 Difference]: Start difference. First operand 442 states and 591 transitions. Second operand has 16 states, 15 states have (on average 7.2) internal successors, (108), 16 states have internal predecessors, (108), 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 00:21:56,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:21:56,244 INFO L93 Difference]: Finished difference Result 1002 states and 1340 transitions. [2023-11-29 00:21:56,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 00:21:56,245 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 7.2) internal successors, (108), 16 states have internal predecessors, (108), 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 00:21:56,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:21:56,252 INFO L225 Difference]: With dead ends: 1002 [2023-11-29 00:21:56,252 INFO L226 Difference]: Without dead ends: 676 [2023-11-29 00:21:56,254 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 614 GetRequests, 580 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 297 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=345, Invalid=915, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 00:21:56,255 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 999 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1250 mSolverCounterSat, 776 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 999 SdHoareTripleChecker+Valid, 903 SdHoareTripleChecker+Invalid, 2026 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 776 IncrementalHoareTripleChecker+Valid, 1250 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:21:56,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [999 Valid, 903 Invalid, 2026 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [776 Valid, 1250 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 00:21:56,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2023-11-29 00:21:56,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 442. [2023-11-29 00:21:56,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 280 states have (on average 1.1821428571428572) internal successors, (331), 285 states have internal predecessors, (331), 129 states have call successors, (129), 32 states have call predecessors, (129), 32 states have return successors, (129), 124 states have call predecessors, (129), 129 states have call successors, (129) [2023-11-29 00:21:56,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 589 transitions. [2023-11-29 00:21:56,386 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 589 transitions. Word has length 295 [2023-11-29 00:21:56,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:21:56,387 INFO L495 AbstractCegarLoop]: Abstraction has 442 states and 589 transitions. [2023-11-29 00:21:56,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 7.2) internal successors, (108), 16 states have internal predecessors, (108), 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 00:21:56,388 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 589 transitions. [2023-11-29 00:21:56,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-11-29 00:21:56,390 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:21:56,391 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 00:21:56,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:21:56,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:56,592 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:21:56,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:21:56,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1436290317, now seen corresponding path program 1 times [2023-11-29 00:21:56,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:21:56,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1363075935] [2023-11-29 00:21:56,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:56,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:21:56,635 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:21:56,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1997469762] [2023-11-29 00:21:56,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:21:56,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:21:56,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:21:56,637 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:21:56,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:21:56,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:21:56,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 00:21:56,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:09,003 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 00:22:09,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:22:17,393 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 00:22:17,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:17,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1363075935] [2023-11-29 00:22:17,394 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:17,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997469762] [2023-11-29 00:22:17,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997469762] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:22:17,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:22:17,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [16] total 23 [2023-11-29 00:22:17,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689158167] [2023-11-29 00:22:17,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:17,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:22:17,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:17,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:22:17,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2023-11-29 00:22:17,398 INFO L87 Difference]: Start difference. First operand 442 states and 589 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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 00:22:19,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:19,520 INFO L93 Difference]: Finished difference Result 877 states and 1140 transitions. [2023-11-29 00:22:19,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 00:22:19,521 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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 00:22:19,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:19,526 INFO L225 Difference]: With dead ends: 877 [2023-11-29 00:22:19,526 INFO L226 Difference]: Without dead ends: 551 [2023-11-29 00:22:19,527 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=173, Invalid=639, Unknown=0, NotChecked=0, Total=812 [2023-11-29 00:22:19,528 INFO L413 NwaCegarLoop]: 174 mSDtfsCounter, 174 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 826 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:19,528 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 826 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 00:22:19,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2023-11-29 00:22:19,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 454. [2023-11-29 00:22:19,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 292 states have (on average 1.1849315068493151) internal successors, (346), 297 states have internal predecessors, (346), 129 states have call successors, (129), 32 states have call predecessors, (129), 32 states have return successors, (129), 124 states have call predecessors, (129), 129 states have call successors, (129) [2023-11-29 00:22:19,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 604 transitions. [2023-11-29 00:22:19,596 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 604 transitions. Word has length 295 [2023-11-29 00:22:19,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:19,596 INFO L495 AbstractCegarLoop]: Abstraction has 454 states and 604 transitions. [2023-11-29 00:22:19,597 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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 00:22:19,597 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 604 transitions. [2023-11-29 00:22:19,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-11-29 00:22:19,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:19,599 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 00:22:19,605 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:22:19,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:19,800 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:19,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:19,801 INFO L85 PathProgramCache]: Analyzing trace with hash -792484041, now seen corresponding path program 1 times [2023-11-29 00:22:19,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:19,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894604581] [2023-11-29 00:22:19,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:19,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:19,831 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:19,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [886975227] [2023-11-29 00:22:19,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:19,831 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:19,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:19,832 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:19,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:22:20,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:20,029 INFO L262 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:22:20,035 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:20,065 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 00:22:20,065 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:22:20,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:22:20,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894604581] [2023-11-29 00:22:20,065 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:22:20,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886975227] [2023-11-29 00:22:20,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [886975227] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:22:20,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:22:20,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:22:20,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941815896] [2023-11-29 00:22:20,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:22:20,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:22:20,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:22:20,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:22:20,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:22:20,068 INFO L87 Difference]: Start difference. First operand 454 states and 604 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 00:22:20,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:22:20,252 INFO L93 Difference]: Finished difference Result 799 states and 1050 transitions. [2023-11-29 00:22:20,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:22:20,253 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 00:22:20,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:22:20,256 INFO L225 Difference]: With dead ends: 799 [2023-11-29 00:22:20,257 INFO L226 Difference]: Without dead ends: 461 [2023-11-29 00:22:20,258 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 00:22:20,258 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 66 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:22:20,259 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 534 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:22:20,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2023-11-29 00:22:20,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 456. [2023-11-29 00:22:20,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 294 states have (on average 1.183673469387755) internal successors, (348), 299 states have internal predecessors, (348), 129 states have call successors, (129), 32 states have call predecessors, (129), 32 states have return successors, (129), 124 states have call predecessors, (129), 129 states have call successors, (129) [2023-11-29 00:22:20,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 606 transitions. [2023-11-29 00:22:20,349 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 606 transitions. Word has length 295 [2023-11-29 00:22:20,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:22:20,349 INFO L495 AbstractCegarLoop]: Abstraction has 456 states and 606 transitions. [2023-11-29 00:22:20,350 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 00:22:20,350 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 606 transitions. [2023-11-29 00:22:20,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-11-29 00:22:20,352 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:22:20,352 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 00:22:20,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:22:20,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-29 00:22:20,554 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:22:20,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:22:20,555 INFO L85 PathProgramCache]: Analyzing trace with hash -1178124879, now seen corresponding path program 1 times [2023-11-29 00:22:20,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:22:20,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500890440] [2023-11-29 00:22:20,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:20,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:22:20,591 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:22:20,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [610442489] [2023-11-29 00:22:20,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:22:20,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:22:20,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:22:20,593 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:22:20,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:22:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:22:20,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-29 00:22:20,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:22:56,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4512 backedges. 1552 proven. 909 refuted. 0 times theorem prover too weak. 2051 trivial. 0 not checked. [2023-11-29 00:22:56,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:23:04,946 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 00:23:04,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:23:04,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500890440] [2023-11-29 00:23:04,946 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:23:04,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610442489] [2023-11-29 00:23:04,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610442489] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:23:04,947 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:23:04,947 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [38] total 45 [2023-11-29 00:23:04,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901834564] [2023-11-29 00:23:04,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:23:04,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:23:04,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:23:04,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:23:04,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=376, Invalid=1604, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 00:23:04,950 INFO L87 Difference]: Start difference. First operand 456 states and 606 transitions. Second operand has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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 00:23:06,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:23:06,786 INFO L93 Difference]: Finished difference Result 838 states and 1090 transitions. [2023-11-29 00:23:06,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 00:23:06,787 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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 00:23:06,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:23:06,790 INFO L225 Difference]: With dead ends: 838 [2023-11-29 00:23:06,790 INFO L226 Difference]: Without dead ends: 498 [2023-11-29 00:23:06,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 593 GetRequests, 545 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=418, Invalid=2032, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 00:23:06,793 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 112 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 976 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:23:06,793 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [112 Valid, 976 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 00:23:06,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2023-11-29 00:23:06,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 456. [2023-11-29 00:23:06,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 294 states have (on average 1.183673469387755) internal successors, (348), 299 states have internal predecessors, (348), 129 states have call successors, (129), 32 states have call predecessors, (129), 32 states have return successors, (129), 124 states have call predecessors, (129), 129 states have call successors, (129) [2023-11-29 00:23:06,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 606 transitions. [2023-11-29 00:23:06,860 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 606 transitions. Word has length 295 [2023-11-29 00:23:06,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:23:06,861 INFO L495 AbstractCegarLoop]: Abstraction has 456 states and 606 transitions. [2023-11-29 00:23:06,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.444444444444445) internal successors, (58), 9 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 00:23:06,861 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 606 transitions. [2023-11-29 00:23:06,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-11-29 00:23:06,864 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:23:06,864 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 00:23:06,872 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:23:07,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:07,065 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:23:07,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:23:07,066 INFO L85 PathProgramCache]: Analyzing trace with hash -2023096331, now seen corresponding path program 1 times [2023-11-29 00:23:07,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:23:07,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851161923] [2023-11-29 00:23:07,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:07,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:23:07,103 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:23:07,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [669845290] [2023-11-29 00:23:07,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:07,104 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:07,104 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:23:07,105 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:23:07,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:23:07,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:07,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 659 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-29 00:23:07,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:23:08,967 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 00:23:08,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:23:09,826 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 00:23:09,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:23:09,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851161923] [2023-11-29 00:23:09,827 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:23:09,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669845290] [2023-11-29 00:23:09,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669845290] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:23:09,827 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:23:09,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2023-11-29 00:23:09,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574632339] [2023-11-29 00:23:09,828 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:23:09,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 00:23:09,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:23:09,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 00:23:09,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:23:09,830 INFO L87 Difference]: Start difference. First operand 456 states and 606 transitions. Second operand has 18 states, 17 states have (on average 6.470588235294118) internal successors, (110), 18 states have internal predecessors, (110), 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 00:23:11,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:23:11,968 INFO L93 Difference]: Finished difference Result 958 states and 1249 transitions. [2023-11-29 00:23:11,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 00:23:11,969 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 6.470588235294118) internal successors, (110), 18 states have internal predecessors, (110), 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 00:23:11,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:23:11,973 INFO L225 Difference]: With dead ends: 958 [2023-11-29 00:23:11,973 INFO L226 Difference]: Without dead ends: 618 [2023-11-29 00:23:11,975 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 605 GetRequests, 574 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=271, Invalid=785, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 00:23:11,975 INFO L413 NwaCegarLoop]: 120 mSDtfsCounter, 587 mSDsluCounter, 835 mSDsCounter, 0 mSdLazyCounter, 1496 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 955 SdHoareTripleChecker+Invalid, 1772 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 1496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:23:11,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [634 Valid, 955 Invalid, 1772 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 1496 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 00:23:11,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2023-11-29 00:23:12,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 473. [2023-11-29 00:23:12,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 311 states have (on average 1.1961414790996785) internal successors, (372), 316 states have internal predecessors, (372), 129 states have call successors, (129), 32 states have call predecessors, (129), 32 states have return successors, (129), 124 states have call predecessors, (129), 129 states have call successors, (129) [2023-11-29 00:23:12,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 630 transitions. [2023-11-29 00:23:12,068 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 630 transitions. Word has length 295 [2023-11-29 00:23:12,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:23:12,069 INFO L495 AbstractCegarLoop]: Abstraction has 473 states and 630 transitions. [2023-11-29 00:23:12,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 6.470588235294118) internal successors, (110), 18 states have internal predecessors, (110), 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 00:23:12,069 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 630 transitions. [2023-11-29 00:23:12,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-11-29 00:23:12,071 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:23:12,071 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 00:23:12,076 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:23:12,271 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 00:23:12,272 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:23:12,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:23:12,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1980477424, now seen corresponding path program 1 times [2023-11-29 00:23:12,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:23:12,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949912523] [2023-11-29 00:23:12,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:12,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:23:12,305 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:23:12,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1423417581] [2023-11-29 00:23:12,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:12,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:12,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:23:12,307 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:23:12,311 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:23:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:12,506 INFO L262 TraceCheckSpWp]: Trace formula consists of 658 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 00:23:12,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:23:12,541 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 00:23:12,541 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:23:12,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:23:12,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949912523] [2023-11-29 00:23:12,541 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:23:12,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423417581] [2023-11-29 00:23:12,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423417581] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:23:12,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:23:12,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:23:12,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349957457] [2023-11-29 00:23:12,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:23:12,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:23:12,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:23:12,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:23:12,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:23:12,544 INFO L87 Difference]: Start difference. First operand 473 states and 630 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 00:23:12,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:23:12,718 INFO L93 Difference]: Finished difference Result 774 states and 1018 transitions. [2023-11-29 00:23:12,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:23:12,718 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 00:23:12,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:23:12,722 INFO L225 Difference]: With dead ends: 774 [2023-11-29 00:23:12,722 INFO L226 Difference]: Without dead ends: 434 [2023-11-29 00:23:12,723 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 00:23:12,723 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 51 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:23:12,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 523 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:23:12,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2023-11-29 00:23:12,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 405. [2023-11-29 00:23:12,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 260 states have (on average 1.1884615384615385) internal successors, (309), 262 states have internal predecessors, (309), 117 states have call successors, (117), 27 states have call predecessors, (117), 27 states have return successors, (117), 115 states have call predecessors, (117), 117 states have call successors, (117) [2023-11-29 00:23:12,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 543 transitions. [2023-11-29 00:23:12,800 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 543 transitions. Word has length 295 [2023-11-29 00:23:12,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:23:12,801 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 543 transitions. [2023-11-29 00:23:12,801 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 00:23:12,801 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 543 transitions. [2023-11-29 00:23:12,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-11-29 00:23:12,803 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:23:12,803 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 00:23:12,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 00:23:13,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-29 00:23:13,004 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:23:13,004 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:23:13,005 INFO L85 PathProgramCache]: Analyzing trace with hash 1864204560, now seen corresponding path program 1 times [2023-11-29 00:23:13,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:23:13,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364808931] [2023-11-29 00:23:13,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:13,005 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:23:13,039 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:23:13,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [562342985] [2023-11-29 00:23:13,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:13,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:13,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:23:13,041 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:23:13,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:23:13,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:13,293 INFO L262 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 00:23:13,300 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:23:16,942 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 00:23:16,942 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:23:25,099 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 00:23:25,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:23:25,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364808931] [2023-11-29 00:23:25,100 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:23:25,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562342985] [2023-11-29 00:23:25,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [562342985] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:23:25,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:23:25,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 26 [2023-11-29 00:23:25,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995405860] [2023-11-29 00:23:25,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:23:25,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:23:25,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:23:25,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:23:25,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-29 00:23:25,103 INFO L87 Difference]: Start difference. First operand 405 states and 543 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 00:23:27,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:23:27,108 INFO L93 Difference]: Finished difference Result 712 states and 939 transitions. [2023-11-29 00:23:27,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 00:23:27,109 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 00:23:27,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:23:27,112 INFO L225 Difference]: With dead ends: 712 [2023-11-29 00:23:27,112 INFO L226 Difference]: Without dead ends: 444 [2023-11-29 00:23:27,113 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 00:23:27,114 INFO L413 NwaCegarLoop]: 182 mSDtfsCounter, 161 mSDsluCounter, 638 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:23:27,114 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 820 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:23:27,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2023-11-29 00:23:27,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 413. [2023-11-29 00:23:27,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 268 states have (on average 1.1902985074626866) internal successors, (319), 270 states have internal predecessors, (319), 117 states have call successors, (117), 27 states have call predecessors, (117), 27 states have return successors, (117), 115 states have call predecessors, (117), 117 states have call successors, (117) [2023-11-29 00:23:27,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 553 transitions. [2023-11-29 00:23:27,207 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 553 transitions. Word has length 295 [2023-11-29 00:23:27,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:23:27,208 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 553 transitions. [2023-11-29 00:23:27,208 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 00:23:27,208 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 553 transitions. [2023-11-29 00:23:27,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2023-11-29 00:23:27,210 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:23:27,211 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 00:23:27,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 00:23:27,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 00:23:27,412 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:23:27,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:23:27,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1729698158, now seen corresponding path program 1 times [2023-11-29 00:23:27,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:23:27,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406993751] [2023-11-29 00:23:27,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:27,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:23:27,437 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:23:27,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [897704696] [2023-11-29 00:23:27,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:27,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:27,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:23:27,439 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:23:27,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:23:27,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:27,658 INFO L262 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-29 00:23:27,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:23:31,120 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 00:23:31,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:23:38,050 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 00:23:38,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:23:38,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406993751] [2023-11-29 00:23:38,050 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:23:38,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897704696] [2023-11-29 00:23:38,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897704696] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:23:38,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:23:38,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [19] total 26 [2023-11-29 00:23:38,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620062577] [2023-11-29 00:23:38,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:23:38,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:23:38,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:23:38,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:23:38,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=499, Unknown=0, NotChecked=0, Total=650 [2023-11-29 00:23:38,053 INFO L87 Difference]: Start difference. First operand 413 states and 553 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 00:23:39,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:23:39,575 INFO L93 Difference]: Finished difference Result 720 states and 948 transitions. [2023-11-29 00:23:39,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 00:23:39,576 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 00:23:39,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:23:39,580 INFO L225 Difference]: With dead ends: 720 [2023-11-29 00:23:39,580 INFO L226 Difference]: Without dead ends: 444 [2023-11-29 00:23:39,581 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 564 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=269, Invalid=921, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 00:23:39,582 INFO L413 NwaCegarLoop]: 179 mSDtfsCounter, 196 mSDsluCounter, 510 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 689 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:23:39,582 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 689 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:23:39,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2023-11-29 00:23:39,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 413. [2023-11-29 00:23:39,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 268 states have (on average 1.1902985074626866) internal successors, (319), 270 states have internal predecessors, (319), 117 states have call successors, (117), 27 states have call predecessors, (117), 27 states have return successors, (117), 115 states have call predecessors, (117), 117 states have call successors, (117) [2023-11-29 00:23:39,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 553 transitions. [2023-11-29 00:23:39,709 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 553 transitions. Word has length 295 [2023-11-29 00:23:39,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:23:39,709 INFO L495 AbstractCegarLoop]: Abstraction has 413 states and 553 transitions. [2023-11-29 00:23:39,709 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 00:23:39,710 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 553 transitions. [2023-11-29 00:23:39,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-11-29 00:23:39,712 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:23:39,712 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, 1] [2023-11-29 00:23:39,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 00:23:39,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:39,913 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:23:39,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:23:39,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1650235891, now seen corresponding path program 1 times [2023-11-29 00:23:39,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:23:39,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892053404] [2023-11-29 00:23:39,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:39,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:23:39,943 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:23:39,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [629160516] [2023-11-29 00:23:39,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:23:39,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:23:39,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:23:39,944 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:23:39,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:23:40,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:23:40,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 660 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 00:23:40,197 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:23:55,289 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 00:23:55,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:24:02,500 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 00:24:02,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:24:02,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892053404] [2023-11-29 00:24:02,500 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:24:02,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629160516] [2023-11-29 00:24:02,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629160516] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:24:02,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:24:02,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 23 [2023-11-29 00:24:02,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22636481] [2023-11-29 00:24:02,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:24:02,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:24:02,502 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:24:02,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:24:02,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2023-11-29 00:24:02,503 INFO L87 Difference]: Start difference. First operand 413 states and 553 transitions. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 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 00:24:03,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:24:03,474 INFO L93 Difference]: Finished difference Result 743 states and 973 transitions. [2023-11-29 00:24:03,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 00:24:03,475 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 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 00:24:03,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:24:03,477 INFO L225 Difference]: With dead ends: 743 [2023-11-29 00:24:03,477 INFO L226 Difference]: Without dead ends: 467 [2023-11-29 00:24:03,478 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 569 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=167, Invalid=535, Unknown=0, NotChecked=0, Total=702 [2023-11-29 00:24:03,478 INFO L413 NwaCegarLoop]: 169 mSDtfsCounter, 147 mSDsluCounter, 479 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 648 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:24:03,479 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 648 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:24:03,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2023-11-29 00:24:03,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 415. [2023-11-29 00:24:03,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 270 states have (on average 1.1962962962962962) internal successors, (323), 272 states have internal predecessors, (323), 117 states have call successors, (117), 27 states have call predecessors, (117), 27 states have return successors, (117), 115 states have call predecessors, (117), 117 states have call successors, (117) [2023-11-29 00:24:03,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 557 transitions. [2023-11-29 00:24:03,555 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 557 transitions. Word has length 296 [2023-11-29 00:24:03,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:24:03,556 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 557 transitions. [2023-11-29 00:24:03,556 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 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 00:24:03,556 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 557 transitions. [2023-11-29 00:24:03,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-11-29 00:24:03,557 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:24:03,558 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 00:24:03,563 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-29 00:24:03,758 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 00:24:03,758 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:24:03,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:24:03,759 INFO L85 PathProgramCache]: Analyzing trace with hash -1006429615, now seen corresponding path program 1 times [2023-11-29 00:24:03,759 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:24:03,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948167845] [2023-11-29 00:24:03,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:24:03,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:24:03,784 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:24:03,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2066615148] [2023-11-29 00:24:03,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:24:03,785 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:24:03,785 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:24:03,786 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:24:03,788 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:24:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:24:03,952 INFO L262 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 00:24:03,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:24:04,719 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 00:24:04,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:24:05,023 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 00:24:05,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:24:05,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948167845] [2023-11-29 00:24:05,023 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:24:05,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066615148] [2023-11-29 00:24:05,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2066615148] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:24:05,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-29 00:24:05,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2023-11-29 00:24:05,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067135736] [2023-11-29 00:24:05,024 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-29 00:24:05,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 00:24:05,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:24:05,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 00:24:05,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2023-11-29 00:24:05,026 INFO L87 Difference]: Start difference. First operand 415 states and 557 transitions. Second operand has 15 states, 14 states have (on average 7.785714285714286) internal successors, (109), 15 states have internal predecessors, (109), 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 00:24:06,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:24:06,111 INFO L93 Difference]: Finished difference Result 802 states and 1041 transitions. [2023-11-29 00:24:06,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-29 00:24:06,112 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 7.785714285714286) internal successors, (109), 15 states have internal predecessors, (109), 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 296 [2023-11-29 00:24:06,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:24:06,115 INFO L225 Difference]: With dead ends: 802 [2023-11-29 00:24:06,115 INFO L226 Difference]: Without dead ends: 524 [2023-11-29 00:24:06,116 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 606 GetRequests, 579 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=197, Invalid=559, Unknown=0, NotChecked=0, Total=756 [2023-11-29 00:24:06,116 INFO L413 NwaCegarLoop]: 135 mSDtfsCounter, 570 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 1113 mSolverCounterSat, 212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 757 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 212 IncrementalHoareTripleChecker+Valid, 1113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:24:06,116 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 757 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [212 Valid, 1113 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 00:24:06,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2023-11-29 00:24:06,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 416. [2023-11-29 00:24:06,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 271 states have (on average 1.1992619926199262) internal successors, (325), 273 states have internal predecessors, (325), 117 states have call successors, (117), 27 states have call predecessors, (117), 27 states have return successors, (117), 115 states have call predecessors, (117), 117 states have call successors, (117) [2023-11-29 00:24:06,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 559 transitions. [2023-11-29 00:24:06,207 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 559 transitions. Word has length 296 [2023-11-29 00:24:06,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:24:06,207 INFO L495 AbstractCegarLoop]: Abstraction has 416 states and 559 transitions. [2023-11-29 00:24:06,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 7.785714285714286) internal successors, (109), 15 states have internal predecessors, (109), 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 00:24:06,208 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 559 transitions. [2023-11-29 00:24:06,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-11-29 00:24:06,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:24:06,209 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 00:24:06,214 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 00:24:06,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:24:06,410 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:24:06,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:24:06,410 INFO L85 PathProgramCache]: Analyzing trace with hash -1392070453, now seen corresponding path program 1 times [2023-11-29 00:24:06,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:24:06,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988236148] [2023-11-29 00:24:06,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:24:06,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:24:06,438 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:24:06,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [543378667] [2023-11-29 00:24:06,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:24:06,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:24:06,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:24:06,439 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:24:06,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:24:07,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:24:07,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 657 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 00:24:07,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:24:20,361 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 00:24:20,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:24:26,160 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 00:24:26,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:24:26,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988236148] [2023-11-29 00:24:26,160 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:24:26,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543378667] [2023-11-29 00:24:26,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543378667] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:24:26,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:24:26,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [17] total 25 [2023-11-29 00:24:26,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536258030] [2023-11-29 00:24:26,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:24:26,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:24:26,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:24:26,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:24:26,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=456, Unknown=0, NotChecked=0, Total=600 [2023-11-29 00:24:26,163 INFO L87 Difference]: Start difference. First operand 416 states and 559 transitions. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 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 00:24:27,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:24:27,079 INFO L93 Difference]: Finished difference Result 740 states and 972 transitions. [2023-11-29 00:24:27,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 00:24:27,080 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 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 00:24:27,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:24:27,082 INFO L225 Difference]: With dead ends: 740 [2023-11-29 00:24:27,082 INFO L226 Difference]: Without dead ends: 462 [2023-11-29 00:24:27,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 567 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=184, Invalid=628, Unknown=0, NotChecked=0, Total=812 [2023-11-29 00:24:27,084 INFO L413 NwaCegarLoop]: 172 mSDtfsCounter, 114 mSDsluCounter, 481 mSDsCounter, 0 mSdLazyCounter, 177 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:24:27,084 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 653 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 177 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:24:27,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2023-11-29 00:24:27,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 412. [2023-11-29 00:24:27,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 267 states have (on average 1.198501872659176) internal successors, (320), 269 states have internal predecessors, (320), 117 states have call successors, (117), 27 states have call predecessors, (117), 27 states have return successors, (117), 115 states have call predecessors, (117), 117 states have call successors, (117) [2023-11-29 00:24:27,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 554 transitions. [2023-11-29 00:24:27,172 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 554 transitions. Word has length 296 [2023-11-29 00:24:27,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:24:27,173 INFO L495 AbstractCegarLoop]: Abstraction has 412 states and 554 transitions. [2023-11-29 00:24:27,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 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 00:24:27,173 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 554 transitions. [2023-11-29 00:24:27,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-11-29 00:24:27,174 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:24:27,174 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 00:24:27,182 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 00:24:27,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 00:24:27,375 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:24:27,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:24:27,376 INFO L85 PathProgramCache]: Analyzing trace with hash -2027497969, now seen corresponding path program 1 times [2023-11-29 00:24:27,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:24:27,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439710949] [2023-11-29 00:24:27,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:24:27,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:24:27,397 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:24:27,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1642908917] [2023-11-29 00:24:27,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:24:27,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:24:27,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:24:27,398 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:24:27,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:24:27,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:24:27,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 00:24:27,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:24:37,296 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 00:24:37,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:24:42,839 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 00:24:42,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:24:42,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439710949] [2023-11-29 00:24:42,840 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:24:42,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642908917] [2023-11-29 00:24:42,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642908917] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:24:42,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:24:42,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 23 [2023-11-29 00:24:42,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580850622] [2023-11-29 00:24:42,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:24:42,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:24:42,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:24:42,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:24:42,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-11-29 00:24:42,842 INFO L87 Difference]: Start difference. First operand 412 states and 554 transitions. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 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 00:24:44,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:24:44,085 INFO L93 Difference]: Finished difference Result 741 states and 974 transitions. [2023-11-29 00:24:44,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 00:24:44,086 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 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 00:24:44,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:24:44,088 INFO L225 Difference]: With dead ends: 741 [2023-11-29 00:24:44,088 INFO L226 Difference]: Without dead ends: 463 [2023-11-29 00:24:44,089 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 569 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=254, Invalid=802, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 00:24:44,090 INFO L413 NwaCegarLoop]: 192 mSDtfsCounter, 160 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:24:44,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [160 Valid, 865 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:24:44,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2023-11-29 00:24:44,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 420. [2023-11-29 00:24:44,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 275 states have (on average 1.1963636363636363) internal successors, (329), 277 states have internal predecessors, (329), 117 states have call successors, (117), 27 states have call predecessors, (117), 27 states have return successors, (117), 115 states have call predecessors, (117), 117 states have call successors, (117) [2023-11-29 00:24:44,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 563 transitions. [2023-11-29 00:24:44,170 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 563 transitions. Word has length 296 [2023-11-29 00:24:44,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:24:44,170 INFO L495 AbstractCegarLoop]: Abstraction has 420 states and 563 transitions. [2023-11-29 00:24:44,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 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 00:24:44,170 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 563 transitions. [2023-11-29 00:24:44,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2023-11-29 00:24:44,171 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:24:44,172 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 00:24:44,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 00:24:44,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:24:44,372 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:24:44,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:24:44,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1769332531, now seen corresponding path program 1 times [2023-11-29 00:24:44,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:24:44,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176889528] [2023-11-29 00:24:44,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:24:44,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:24:44,394 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:24:44,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [928507814] [2023-11-29 00:24:44,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:24:44,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:24:44,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:24:44,396 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:24:44,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:24:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:24:44,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 00:24:44,620 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:24:54,124 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 00:24:54,124 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:24:59,543 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 00:24:59,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:24:59,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176889528] [2023-11-29 00:24:59,543 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:24:59,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928507814] [2023-11-29 00:24:59,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928507814] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 00:24:59,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 00:24:59,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [16] total 23 [2023-11-29 00:24:59,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858553966] [2023-11-29 00:24:59,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:24:59,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-29 00:24:59,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:24:59,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-29 00:24:59,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=378, Unknown=0, NotChecked=0, Total=506 [2023-11-29 00:24:59,545 INFO L87 Difference]: Start difference. First operand 420 states and 563 transitions. Second operand has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 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 00:25:00,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:25:00,819 INFO L93 Difference]: Finished difference Result 749 states and 982 transitions. [2023-11-29 00:25:00,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 00:25:00,819 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 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 00:25:00,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:25:00,822 INFO L225 Difference]: With dead ends: 749 [2023-11-29 00:25:00,822 INFO L226 Difference]: Without dead ends: 463 [2023-11-29 00:25:00,823 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 600 GetRequests, 569 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=254, Invalid=802, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 00:25:00,823 INFO L413 NwaCegarLoop]: 197 mSDtfsCounter, 131 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 878 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:25:00,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 878 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:25:00,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2023-11-29 00:25:00,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 417. [2023-11-29 00:25:00,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 272 states have (on average 1.1948529411764706) internal successors, (325), 274 states have internal predecessors, (325), 117 states have call successors, (117), 27 states have call predecessors, (117), 27 states have return successors, (117), 115 states have call predecessors, (117), 117 states have call successors, (117) [2023-11-29 00:25:00,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 559 transitions. [2023-11-29 00:25:00,903 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 559 transitions. Word has length 296 [2023-11-29 00:25:00,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:25:00,903 INFO L495 AbstractCegarLoop]: Abstraction has 417 states and 559 transitions. [2023-11-29 00:25:00,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 5.9) internal successors, (59), 10 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 00:25:00,904 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 559 transitions. [2023-11-29 00:25:00,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 298 [2023-11-29 00:25:00,905 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:25:00,906 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 00:25:00,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-29 00:25:01,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:25:01,106 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:25:01,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:25:01,107 INFO L85 PathProgramCache]: Analyzing trace with hash -29180427, now seen corresponding path program 1 times [2023-11-29 00:25:01,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:25:01,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10636979] [2023-11-29 00:25:01,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:01,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:25:01,130 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:25:01,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1765871232] [2023-11-29 00:25:01,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:25:01,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:25:01,131 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:25:01,132 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:25:01,133 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:25:01,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:25:01,301 INFO L262 TraceCheckSpWp]: Trace formula consists of 664 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 00:25:01,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:26:40,997 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 00:26:40,998 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 00:26:40,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:26:40,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10636979] [2023-11-29 00:26:40,998 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-29 00:26:40,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765871232] [2023-11-29 00:26:40,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765871232] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:26:40,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:26:40,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2023-11-29 00:26:40,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3899871] [2023-11-29 00:26:40,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:26:40,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 00:26:40,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:26:41,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 00:26:41,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:26:41,000 INFO L87 Difference]: Start difference. First operand 417 states and 559 transitions. Second operand has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 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 00:26:41,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:26:41,354 INFO L93 Difference]: Finished difference Result 462 states and 607 transitions. [2023-11-29 00:26:41,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:26:41,355 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 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 297 [2023-11-29 00:26:41,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:26:41,358 INFO L225 Difference]: With dead ends: 462 [2023-11-29 00:26:41,358 INFO L226 Difference]: Without dead ends: 460 [2023-11-29 00:26:41,358 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 289 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2023-11-29 00:26:41,359 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 96 mSDsluCounter, 924 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 1136 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:26:41,359 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 1136 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:26:41,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2023-11-29 00:26:41,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 423. [2023-11-29 00:26:41,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 423 states, 277 states have (on average 1.1913357400722022) internal successors, (330), 279 states have internal predecessors, (330), 117 states have call successors, (117), 28 states have call predecessors, (117), 28 states have return successors, (117), 115 states have call predecessors, (117), 117 states have call successors, (117) [2023-11-29 00:26:41,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 564 transitions. [2023-11-29 00:26:41,451 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 564 transitions. Word has length 297 [2023-11-29 00:26:41,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:26:41,451 INFO L495 AbstractCegarLoop]: Abstraction has 423 states and 564 transitions. [2023-11-29 00:26:41,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 6.666666666666667) internal successors, (60), 9 states have internal predecessors, (60), 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 00:26:41,452 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 564 transitions. [2023-11-29 00:26:41,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2023-11-29 00:26:41,453 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:26:41,453 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, 1] [2023-11-29 00:26:41,459 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 00:26:41,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:41,654 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-29 00:26:41,654 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:26:41,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1209482867, now seen corresponding path program 1 times [2023-11-29 00:26:41,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:26:41,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810449766] [2023-11-29 00:26:41,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:41,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:26:41,682 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-29 00:26:41,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [125751801] [2023-11-29 00:26:41,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:26:41,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:26:41,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:26:41,684 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:26:41,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9f3caf0f-69ec-4551-b777-0017dc775dc9/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 00:26:41,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:26:41,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 668 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 00:26:41,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:28:22,001 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 00:28:22,001 INFO L327 TraceCheckSpWp]: Computing backward predicates...