./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/array-patterns/array22_pattern.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 527bcce2 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_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/config/AutomizerReach.xml -i ../../sv-benchmarks/c/array-patterns/array22_pattern.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx --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 31d323b6985f030ac0fb5fda45d0cb8af14c3bb3898c8ff09cf5a292e40f357b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:07:07,083 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:07:07,208 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-21 22:07:07,212 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:07:07,216 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:07:07,244 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:07:07,245 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:07:07,245 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:07:07,246 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-21 22:07:07,247 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-21 22:07:07,247 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:07:07,248 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:07:07,249 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:07:07,249 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:07:07,250 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:07:07,251 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:07:07,251 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-21 22:07:07,252 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:07:07,252 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:07:07,253 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:07:07,254 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:07:07,254 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-21 22:07:07,255 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:07:07,255 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-21 22:07:07,256 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:07:07,256 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-21 22:07:07,257 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:07:07,258 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:07:07,258 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:07:07,259 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:07:07,259 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:07:07,268 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:07:07,269 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:07:07,269 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:07:07,270 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-21 22:07:07,270 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:07:07,271 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:07:07,271 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:07:07,272 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:07:07,272 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-21 22:07:07,273 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:07:07,275 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:07:07,276 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_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 31d323b6985f030ac0fb5fda45d0cb8af14c3bb3898c8ff09cf5a292e40f357b [2023-11-21 22:07:07,574 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:07:07,616 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:07:07,620 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:07:07,624 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:07:07,625 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:07:07,627 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/array-patterns/array22_pattern.c [2023-11-21 22:07:11,371 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:07:11,629 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:07:11,630 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/sv-benchmarks/c/array-patterns/array22_pattern.c [2023-11-21 22:07:11,641 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/data/642ad8484/98ac0f1227a649a1931b1a9ef3ea1eac/FLAGd6184aa44 [2023-11-21 22:07:11,660 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/data/642ad8484/98ac0f1227a649a1931b1a9ef3ea1eac [2023-11-21 22:07:11,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:07:11,665 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:07:11,667 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:07:11,668 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:07:11,677 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:07:11,679 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:07:11" (1/1) ... [2023-11-21 22:07:11,680 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@73db1b7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:11, skipping insertion in model container [2023-11-21 22:07:11,681 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:07:11" (1/1) ... [2023-11-21 22:07:11,728 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:07:11,955 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_9a2de7dc-2896-4236-aff5-c77ba27489f9/sv-benchmarks/c/array-patterns/array22_pattern.c[1347,1360] [2023-11-21 22:07:12,021 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:07:12,033 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:07:12,052 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_9a2de7dc-2896-4236-aff5-c77ba27489f9/sv-benchmarks/c/array-patterns/array22_pattern.c[1347,1360] [2023-11-21 22:07:12,094 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:07:12,114 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:07:12,115 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:12 WrapperNode [2023-11-21 22:07:12,115 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:07:12,117 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:07:12,118 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:07:12,118 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:07:12,129 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:12" (1/1) ... [2023-11-21 22:07:12,152 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:12" (1/1) ... [2023-11-21 22:07:12,196 INFO L138 Inliner]: procedures = 17, calls = 22, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 111 [2023-11-21 22:07:12,198 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:07:12,199 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:07:12,199 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:07:12,200 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:07:12,214 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:12" (1/1) ... [2023-11-21 22:07:12,215 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:12" (1/1) ... [2023-11-21 22:07:12,227 INFO L184 PluginConnector]: Executing the observer HeapSplitter from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:12" (1/1) ... [2023-11-21 22:07:12,257 INFO L187 HeapSplitter]: Split 8 memory accesses to 2 slices as follows [2, 6] [2023-11-21 22:07:12,260 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:12" (1/1) ... [2023-11-21 22:07:12,260 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:12" (1/1) ... [2023-11-21 22:07:12,267 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:12" (1/1) ... [2023-11-21 22:07:12,280 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:12" (1/1) ... [2023-11-21 22:07:12,282 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:12" (1/1) ... [2023-11-21 22:07:12,283 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:12" (1/1) ... [2023-11-21 22:07:12,287 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:07:12,288 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:07:12,288 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:07:12,289 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:07:12,290 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:12" (1/1) ... [2023-11-21 22:07:12,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:07:12,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:07:12,328 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:07:12,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:07:12,373 INFO L130 BoogieDeclarations]: Found specification of procedure outerBoundaryPatternCheck [2023-11-21 22:07:12,374 INFO L138 BoogieDeclarations]: Found implementation of procedure outerBoundaryPatternCheck [2023-11-21 22:07:12,374 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:07:12,374 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-21 22:07:12,374 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-21 22:07:12,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-21 22:07:12,375 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-21 22:07:12,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-21 22:07:12,378 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-21 22:07:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-21 22:07:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:07:12,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:07:12,379 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-21 22:07:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-21 22:07:12,380 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:07:12,469 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:07:12,471 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:07:12,771 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:07:12,946 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:07:12,947 INFO L308 CfgBuilder]: Removed 5 assume(true) statements. [2023-11-21 22:07:12,950 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:07:12 BoogieIcfgContainer [2023-11-21 22:07:12,950 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:07:12,955 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:07:12,955 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:07:12,959 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:07:12,960 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:07:11" (1/3) ... [2023-11-21 22:07:12,961 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d0289d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:07:12, skipping insertion in model container [2023-11-21 22:07:12,962 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:07:12" (2/3) ... [2023-11-21 22:07:12,962 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d0289d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:07:12, skipping insertion in model container [2023-11-21 22:07:12,963 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:07:12" (3/3) ... [2023-11-21 22:07:12,965 INFO L112 eAbstractionObserver]: Analyzing ICFG array22_pattern.c [2023-11-21 22:07:12,996 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:07:12,997 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-21 22:07:13,072 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:07:13,083 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;@4a28c87d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:07:13,084 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-21 22:07:13,090 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-21 22:07:13,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-21 22:07:13,099 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:13,100 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:13,101 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:07:13,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:13,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1938318667, now seen corresponding path program 1 times [2023-11-21 22:07:13,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:13,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962176931] [2023-11-21 22:07:13,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:13,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:13,261 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:07:13,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [356432789] [2023-11-21 22:07:13,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:13,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:07:13,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:07:13,265 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:07:13,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:07:13,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:13,401 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 1 conjunts are in the unsatisfiable core [2023-11-21 22:07:13,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:07:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:07:13,449 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:07:13,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:13,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962176931] [2023-11-21 22:07:13,450 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:07:13,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356432789] [2023-11-21 22:07:13,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [356432789] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:13,452 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:13,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:07:13,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746323350] [2023-11-21 22:07:13,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:13,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2023-11-21 22:07:13,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:13,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2023-11-21 22:07:13,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-21 22:07:13,506 INFO L87 Difference]: Start difference. First operand has 25 states, 16 states have (on average 1.5) internal successors, (24), 17 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:07:13,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:13,571 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2023-11-21 22:07:13,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2023-11-21 22:07:13,573 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2023-11-21 22:07:13,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:13,581 INFO L225 Difference]: With dead ends: 33 [2023-11-21 22:07:13,581 INFO L226 Difference]: Without dead ends: 23 [2023-11-21 22:07:13,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2023-11-21 22:07:13,591 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:13,593 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:07:13,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-21 22:07:13,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-21 22:07:13,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-21 22:07:13,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 30 transitions. [2023-11-21 22:07:13,641 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 30 transitions. Word has length 11 [2023-11-21 22:07:13,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:13,643 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 30 transitions. [2023-11-21 22:07:13,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:07:13,644 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 30 transitions. [2023-11-21 22:07:13,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-21 22:07:13,648 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:13,648 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:13,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-21 22:07:13,857 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable0 [2023-11-21 22:07:13,857 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:07:13,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:13,858 INFO L85 PathProgramCache]: Analyzing trace with hash -651899950, now seen corresponding path program 1 times [2023-11-21 22:07:13,858 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:13,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197564860] [2023-11-21 22:07:13,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:13,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:13,907 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:07:13,908 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1326204036] [2023-11-21 22:07:13,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:13,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:07:13,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:07:13,921 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:07:13,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:07:14,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:14,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 5 conjunts are in the unsatisfiable core [2023-11-21 22:07:14,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:07:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-21 22:07:14,109 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:07:14,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:14,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197564860] [2023-11-21 22:07:14,110 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:07:14,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326204036] [2023-11-21 22:07:14,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1326204036] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:14,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:14,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:07:14,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992839280] [2023-11-21 22:07:14,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:14,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:07:14,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:14,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:07:14,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:07:14,115 INFO L87 Difference]: Start difference. First operand 23 states and 30 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:07:14,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:14,177 INFO L93 Difference]: Finished difference Result 28 states and 36 transitions. [2023-11-21 22:07:14,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:07:14,178 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 26 [2023-11-21 22:07:14,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:14,181 INFO L225 Difference]: With dead ends: 28 [2023-11-21 22:07:14,181 INFO L226 Difference]: Without dead ends: 25 [2023-11-21 22:07:14,182 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:07:14,186 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:14,187 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 46 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:07:14,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-21 22:07:14,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-21 22:07:14,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-21 22:07:14,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 33 transitions. [2023-11-21 22:07:14,210 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 33 transitions. Word has length 26 [2023-11-21 22:07:14,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:14,212 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 33 transitions. [2023-11-21 22:07:14,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 2 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:07:14,217 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 33 transitions. [2023-11-21 22:07:14,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-21 22:07:14,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:14,219 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:14,241 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:07:14,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:07:14,438 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:07:14,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:14,439 INFO L85 PathProgramCache]: Analyzing trace with hash -740825203, now seen corresponding path program 1 times [2023-11-21 22:07:14,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:14,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206205246] [2023-11-21 22:07:14,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:14,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:14,482 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:07:14,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1755695182] [2023-11-21 22:07:14,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:14,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:07:14,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:07:14,484 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:07:14,486 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:07:14,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:14,580 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 22:07:14,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:07:14,640 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:07:14,640 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:07:14,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:14,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206205246] [2023-11-21 22:07:14,641 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:07:14,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755695182] [2023-11-21 22:07:14,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755695182] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:14,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:14,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-21 22:07:14,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502219455] [2023-11-21 22:07:14,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:14,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:07:14,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:14,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:07:14,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:07:14,644 INFO L87 Difference]: Start difference. First operand 25 states and 33 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:07:14,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:14,753 INFO L93 Difference]: Finished difference Result 51 states and 68 transitions. [2023-11-21 22:07:14,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-21 22:07:14,754 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 29 [2023-11-21 22:07:14,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:14,755 INFO L225 Difference]: With dead ends: 51 [2023-11-21 22:07:14,755 INFO L226 Difference]: Without dead ends: 30 [2023-11-21 22:07:14,756 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:07:14,757 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 11 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:14,757 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 42 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:07:14,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-21 22:07:14,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2023-11-21 22:07:14,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-21 22:07:14,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 34 transitions. [2023-11-21 22:07:14,767 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 34 transitions. Word has length 29 [2023-11-21 22:07:14,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:14,767 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 34 transitions. [2023-11-21 22:07:14,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:07:14,768 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 34 transitions. [2023-11-21 22:07:14,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-21 22:07:14,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:14,769 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:14,795 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:07:14,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:07:14,985 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:07:14,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:14,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1069598254, now seen corresponding path program 1 times [2023-11-21 22:07:14,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:14,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808482127] [2023-11-21 22:07:14,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:14,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:15,009 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:07:15,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [122554811] [2023-11-21 22:07:15,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:15,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:07:15,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:07:15,015 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:07:15,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:07:15,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:15,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 22:07:15,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:07:15,149 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 22:07:15,149 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:07:15,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:15,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808482127] [2023-11-21 22:07:15,150 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:07:15,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122554811] [2023-11-21 22:07:15,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122554811] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:07:15,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:07:15,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-21 22:07:15,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867565597] [2023-11-21 22:07:15,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:07:15,153 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:07:15,153 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:15,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:07:15,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:07:15,154 INFO L87 Difference]: Start difference. First operand 26 states and 34 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:07:15,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:15,209 INFO L93 Difference]: Finished difference Result 50 states and 67 transitions. [2023-11-21 22:07:15,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:07:15,210 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 31 [2023-11-21 22:07:15,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:15,211 INFO L225 Difference]: With dead ends: 50 [2023-11-21 22:07:15,211 INFO L226 Difference]: Without dead ends: 28 [2023-11-21 22:07:15,212 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:07:15,213 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:15,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 36 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:07:15,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-21 22:07:15,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2023-11-21 22:07:15,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-21 22:07:15,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2023-11-21 22:07:15,222 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 31 [2023-11-21 22:07:15,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:15,222 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2023-11-21 22:07:15,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 states have internal predecessors, (19), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2023-11-21 22:07:15,223 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2023-11-21 22:07:15,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-21 22:07:15,224 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:15,224 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:15,249 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:07:15,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2023-11-21 22:07:15,446 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:07:15,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:15,446 INFO L85 PathProgramCache]: Analyzing trace with hash 211388520, now seen corresponding path program 1 times [2023-11-21 22:07:15,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:15,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126906808] [2023-11-21 22:07:15,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:15,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:15,473 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:07:15,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [465042974] [2023-11-21 22:07:15,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:15,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:07:15,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:07:15,480 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:07:15,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:07:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:07:15,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 22:07:15,589 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:07:15,652 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-21 22:07:15,653 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:07:15,763 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-21 22:07:15,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:15,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126906808] [2023-11-21 22:07:15,764 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:07:15,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465042974] [2023-11-21 22:07:15,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465042974] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:07:15,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:07:15,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2023-11-21 22:07:15,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994163632] [2023-11-21 22:07:15,765 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:07:15,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-21 22:07:15,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:15,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-21 22:07:15,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2023-11-21 22:07:15,768 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 9 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-21 22:07:15,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:15,882 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2023-11-21 22:07:15,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:07:15,883 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 32 [2023-11-21 22:07:15,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:15,884 INFO L225 Difference]: With dead ends: 54 [2023-11-21 22:07:15,884 INFO L226 Difference]: Without dead ends: 31 [2023-11-21 22:07:15,885 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2023-11-21 22:07:15,886 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 41 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:15,887 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 29 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:07:15,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-21 22:07:15,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-21 22:07:15,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-21 22:07:15,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2023-11-21 22:07:15,905 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 32 [2023-11-21 22:07:15,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:15,905 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2023-11-21 22:07:15,906 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (9), 2 states have call predecessors, (9), 4 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2023-11-21 22:07:15,906 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2023-11-21 22:07:15,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-21 22:07:15,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:15,910 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:15,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 22:07:16,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:07:16,133 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:07:16,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:16,134 INFO L85 PathProgramCache]: Analyzing trace with hash 609822147, now seen corresponding path program 2 times [2023-11-21 22:07:16,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:16,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561411073] [2023-11-21 22:07:16,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:16,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:16,173 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:07:16,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1155091642] [2023-11-21 22:07:16,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-21 22:07:16,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:07:16,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:07:16,177 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:07:16,185 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 22:07:16,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-21 22:07:16,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:07:16,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 22:07:16,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:07:16,355 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-21 22:07:16,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:07:16,419 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-21 22:07:16,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:07:16,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561411073] [2023-11-21 22:07:16,421 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:07:16,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155091642] [2023-11-21 22:07:16,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1155091642] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:07:16,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:07:16,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2023-11-21 22:07:16,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381227738] [2023-11-21 22:07:16,422 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:07:16,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-21 22:07:16,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:07:16,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-21 22:07:16,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:07:16,425 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-21 22:07:16,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:07:16,649 INFO L93 Difference]: Finished difference Result 66 states and 82 transitions. [2023-11-21 22:07:16,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:07:16,650 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 34 [2023-11-21 22:07:16,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:07:16,651 INFO L225 Difference]: With dead ends: 66 [2023-11-21 22:07:16,651 INFO L226 Difference]: Without dead ends: 45 [2023-11-21 22:07:16,652 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2023-11-21 22:07:16,653 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:07:16,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 80 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:07:16,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-21 22:07:16,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 39. [2023-11-21 22:07:16,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 30 states have internal predecessors, (37), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-21 22:07:16,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 47 transitions. [2023-11-21 22:07:16,668 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 47 transitions. Word has length 34 [2023-11-21 22:07:16,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:07:16,668 INFO L495 AbstractCegarLoop]: Abstraction has 39 states and 47 transitions. [2023-11-21 22:07:16,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.4545454545454546) internal successors, (27), 11 states have internal predecessors, (27), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-21 22:07:16,669 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 47 transitions. [2023-11-21 22:07:16,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-21 22:07:16,670 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:07:16,670 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:07:16,699 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:07:16,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2023-11-21 22:07:16,874 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:07:16,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:07:16,874 INFO L85 PathProgramCache]: Analyzing trace with hash 750867508, now seen corresponding path program 3 times [2023-11-21 22:07:16,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:07:16,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349536810] [2023-11-21 22:07:16,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:07:16,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:07:16,893 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:07:16,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1648490875] [2023-11-21 22:07:16,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-21 22:07:16,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:07:16,893 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:07:16,894 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:07:16,912 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 22:07:19,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-21 22:07:19,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:07:19,618 WARN L260 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 110 conjunts are in the unsatisfiable core [2023-11-21 22:07:19,633 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:07:19,812 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-21 22:07:19,879 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 18 [2023-11-21 22:07:20,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:07:20,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:07:20,087 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:07:20,087 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 28 treesize of output 30 [2023-11-21 22:07:20,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:07:20,191 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:07:20,193 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:07:20,196 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:07:20,199 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:07:20,199 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 6 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 44 [2023-11-21 22:07:21,552 INFO L349 Elim1Store]: treesize reduction 208, result has 33.5 percent of original size [2023-11-21 22:07:21,552 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 36 case distinctions, treesize of input 74 treesize of output 142 [2023-11-21 22:07:23,283 INFO L349 Elim1Store]: treesize reduction 96, result has 41.8 percent of original size [2023-11-21 22:07:23,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 14 case distinctions, treesize of input 265 treesize of output 279 [2023-11-21 22:07:24,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:07:24,465 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:07:24,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:07:24,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:07:24,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:07:24,490 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:07:24,528 INFO L349 Elim1Store]: treesize reduction 212, result has 0.5 percent of original size [2023-11-21 22:07:24,528 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 2 stores, 5 select indices, 5 select index equivalence classes, 13 disjoint index pairs (out of 10 index pairs), introduced 7 new quantified variables, introduced 8 case distinctions, treesize of input 126 treesize of output 223 [2023-11-21 22:07:24,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:07:24,614 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:07:24,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:07:24,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:07:24,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:07:24,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:07:24,725 INFO L349 Elim1Store]: treesize reduction 144, result has 37.1 percent of original size [2023-11-21 22:07:24,726 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 6 select indices, 6 select index equivalence classes, 13 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 8 case distinctions, treesize of input 137 treesize of output 171 [2023-11-21 22:07:27,339 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:07:27,340 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 137 treesize of output 65 [2023-11-21 22:07:27,518 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-21 22:07:27,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:08:00,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:08:00,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349536810] [2023-11-21 22:08:00,851 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:08:00,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648490875] [2023-11-21 22:08:00,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648490875] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:08:00,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:08:00,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2023-11-21 22:08:00,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531448442] [2023-11-21 22:08:00,852 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2023-11-21 22:08:00,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-21 22:08:00,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:08:00,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-21 22:08:00,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=354, Invalid=2720, Unknown=6, NotChecked=0, Total=3080 [2023-11-21 22:08:00,856 INFO L87 Difference]: Start difference. First operand 39 states and 47 transitions. Second operand has 36 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 28 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-21 22:08:06,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:08:06,522 INFO L93 Difference]: Finished difference Result 92 states and 117 transitions. [2023-11-21 22:08:06,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-21 22:08:06,525 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 28 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 42 [2023-11-21 22:08:06,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:08:06,527 INFO L225 Difference]: With dead ends: 92 [2023-11-21 22:08:06,527 INFO L226 Difference]: Without dead ends: 83 [2023-11-21 22:08:06,530 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1530 ImplicationChecksByTransitivity, 33.9s TimeCoverageRelationStatistics Valid=490, Invalid=3793, Unknown=7, NotChecked=0, Total=4290 [2023-11-21 22:08:06,531 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 70 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 1002 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 1032 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 1002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-21 22:08:06,531 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 150 Invalid, 1032 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 1002 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-21 22:08:06,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-21 22:08:06,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2023-11-21 22:08:06,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 48 states have internal predecessors, (59), 9 states have call successors, (9), 6 states have call predecessors, (9), 6 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2023-11-21 22:08:06,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2023-11-21 22:08:06,558 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 42 [2023-11-21 22:08:06,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:08:06,558 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2023-11-21 22:08:06,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 28 states have internal predecessors, (31), 5 states have call successors, (5), 3 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2023-11-21 22:08:06,559 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2023-11-21 22:08:06,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-21 22:08:06,560 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:08:06,560 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:08:06,575 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 22:08:06,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:08:06,769 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-21 22:08:06,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:08:06,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1791163443, now seen corresponding path program 4 times [2023-11-21 22:08:06,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:08:06,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183059686] [2023-11-21 22:08:06,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:08:06,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:08:06,798 ERROR L246 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2023-11-21 22:08:06,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [578741419] [2023-11-21 22:08:06,798 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-21 22:08:06,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:08:06,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:08:06,800 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:08:06,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 22:08:06,895 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-21 22:08:06,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-21 22:08:06,897 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-21 22:08:06,900 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:08:07,033 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-21 22:08:07,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:08:07,154 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 12 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2023-11-21 22:08:07,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:08:07,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183059686] [2023-11-21 22:08:07,155 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2023-11-21 22:08:07,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578741419] [2023-11-21 22:08:07,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578741419] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:08:07,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:08:07,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2023-11-21 22:08:07,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602779237] [2023-11-21 22:08:07,156 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:08:07,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-21 22:08:07,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:08:07,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-21 22:08:07,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:08:07,159 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-21 22:08:07,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:08:07,494 INFO L93 Difference]: Finished difference Result 204 states and 258 transitions. [2023-11-21 22:08:07,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-21 22:08:07,494 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) Word has length 43 [2023-11-21 22:08:07,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:08:07,497 INFO L225 Difference]: With dead ends: 204 [2023-11-21 22:08:07,497 INFO L226 Difference]: Without dead ends: 140 [2023-11-21 22:08:07,498 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 70 SyntacticMatches, 4 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2023-11-21 22:08:07,499 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 101 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 161 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:08:07,499 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 72 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 161 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:08:07,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-21 22:08:07,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 112. [2023-11-21 22:08:07,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 83 states have (on average 1.2289156626506024) internal successors, (102), 83 states have internal predecessors, (102), 17 states have call successors, (17), 11 states have call predecessors, (17), 11 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2023-11-21 22:08:07,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 136 transitions. [2023-11-21 22:08:07,542 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 136 transitions. Word has length 43 [2023-11-21 22:08:07,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:08:07,543 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 136 transitions. [2023-11-21 22:08:07,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (9), 2 states have call predecessors, (9), 2 states have call successors, (9) [2023-11-21 22:08:07,543 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 136 transitions. [2023-11-21 22:08:07,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-21 22:08:07,545 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:08:07,545 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:08:07,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_9a2de7dc-2896-4236-aff5-c77ba27489f9/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0