./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/watermelon.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/watermelon.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI --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 dda0b992ac1600896503297d86377b482d0a82ded923ea00c7e9ff3fed4db7e7 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-24 21:47:10,090 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-24 21:47:10,185 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-24 21:47:10,191 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-24 21:47:10,192 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-24 21:47:10,216 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-24 21:47:10,217 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-24 21:47:10,218 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-24 21:47:10,219 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-24 21:47:10,220 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-24 21:47:10,220 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-24 21:47:10,221 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-24 21:47:10,222 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-24 21:47:10,223 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-24 21:47:10,223 INFO L153 SettingsManager]: * Use SBE=true [2023-11-24 21:47:10,224 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-24 21:47:10,225 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-24 21:47:10,226 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-24 21:47:10,226 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-24 21:47:10,227 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-24 21:47:10,227 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-24 21:47:10,233 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-24 21:47:10,235 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-24 21:47:10,235 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-24 21:47:10,236 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-24 21:47:10,236 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-24 21:47:10,237 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-24 21:47:10,238 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-24 21:47:10,238 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-24 21:47:10,239 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-24 21:47:10,240 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-24 21:47:10,241 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:47:10,241 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-24 21:47:10,242 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-24 21:47:10,242 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-24 21:47:10,242 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-24 21:47:10,243 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-24 21:47:10,243 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-24 21:47:10,243 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-24 21:47:10,244 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-24 21:47:10,244 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-24 21:47:10,244 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-24 21:47:10,245 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_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> dda0b992ac1600896503297d86377b482d0a82ded923ea00c7e9ff3fed4db7e7 [2023-11-24 21:47:10,575 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-24 21:47:10,596 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-24 21:47:10,599 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-24 21:47:10,601 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-24 21:47:10,601 INFO L274 PluginConnector]: CDTParser initialized [2023-11-24 21:47:10,603 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/../../sv-benchmarks/c/loops-crafted-1/watermelon.c [2023-11-24 21:47:13,801 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-24 21:47:14,013 INFO L384 CDTParser]: Found 1 translation units. [2023-11-24 21:47:14,014 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/sv-benchmarks/c/loops-crafted-1/watermelon.c [2023-11-24 21:47:14,022 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/data/30f8d99d2/d30fd4cee1cb4ec39cecc56b7edbe18d/FLAG32c4cb824 [2023-11-24 21:47:14,036 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/data/30f8d99d2/d30fd4cee1cb4ec39cecc56b7edbe18d [2023-11-24 21:47:14,039 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-24 21:47:14,041 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-24 21:47:14,043 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-24 21:47:14,043 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-24 21:47:14,052 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-24 21:47:14,053 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:47:14" (1/1) ... [2023-11-24 21:47:14,054 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d9bba5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:14, skipping insertion in model container [2023-11-24 21:47:14,054 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 09:47:14" (1/1) ... [2023-11-24 21:47:14,078 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-24 21:47:14,230 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_a9cfa883-0814-4b48-bf89-afcee0f3d06d/sv-benchmarks/c/loops-crafted-1/watermelon.c[373,386] [2023-11-24 21:47:14,251 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:47:14,263 INFO L202 MainTranslator]: Completed pre-run [2023-11-24 21:47:14,274 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_a9cfa883-0814-4b48-bf89-afcee0f3d06d/sv-benchmarks/c/loops-crafted-1/watermelon.c[373,386] [2023-11-24 21:47:14,282 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-24 21:47:14,300 INFO L206 MainTranslator]: Completed translation [2023-11-24 21:47:14,300 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:14 WrapperNode [2023-11-24 21:47:14,300 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-24 21:47:14,302 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-24 21:47:14,302 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-24 21:47:14,302 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-24 21:47:14,311 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:14" (1/1) ... [2023-11-24 21:47:14,318 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:14" (1/1) ... [2023-11-24 21:47:14,337 INFO L138 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2023-11-24 21:47:14,337 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-24 21:47:14,338 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-24 21:47:14,338 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-24 21:47:14,338 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-24 21:47:14,350 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:14" (1/1) ... [2023-11-24 21:47:14,350 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:14" (1/1) ... [2023-11-24 21:47:14,352 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:14" (1/1) ... [2023-11-24 21:47:14,363 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2023-11-24 21:47:14,363 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:14" (1/1) ... [2023-11-24 21:47:14,364 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:14" (1/1) ... [2023-11-24 21:47:14,367 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:14" (1/1) ... [2023-11-24 21:47:14,371 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:14" (1/1) ... [2023-11-24 21:47:14,372 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:14" (1/1) ... [2023-11-24 21:47:14,373 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:14" (1/1) ... [2023-11-24 21:47:14,376 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-24 21:47:14,377 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-24 21:47:14,377 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-24 21:47:14,377 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-24 21:47:14,378 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:14" (1/1) ... [2023-11-24 21:47:14,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-24 21:47:14,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:14,433 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-24 21:47:14,457 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-24 21:47:14,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-24 21:47:14,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-24 21:47:14,480 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-24 21:47:14,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-24 21:47:14,579 INFO L241 CfgBuilder]: Building ICFG [2023-11-24 21:47:14,583 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-24 21:47:14,850 INFO L282 CfgBuilder]: Performing block encoding [2023-11-24 21:47:14,888 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-24 21:47:14,888 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-24 21:47:14,889 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:47:14 BoogieIcfgContainer [2023-11-24 21:47:14,889 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-24 21:47:14,892 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-24 21:47:14,892 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-24 21:47:14,896 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-24 21:47:14,897 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 09:47:14" (1/3) ... [2023-11-24 21:47:14,897 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40fc4b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:47:14, skipping insertion in model container [2023-11-24 21:47:14,898 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 09:47:14" (2/3) ... [2023-11-24 21:47:14,898 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40fc4b55 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 09:47:14, skipping insertion in model container [2023-11-24 21:47:14,899 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 09:47:14" (3/3) ... [2023-11-24 21:47:14,900 INFO L112 eAbstractionObserver]: Analyzing ICFG watermelon.c [2023-11-24 21:47:14,923 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-24 21:47:14,923 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-24 21:47:14,980 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-24 21:47:14,988 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;@4797a3e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-24 21:47:14,989 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-24 21:47:14,993 INFO L276 IsEmpty]: Start isEmpty. Operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:15,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-24 21:47:15,001 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:15,002 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:15,003 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:15,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:15,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1564077685, now seen corresponding path program 1 times [2023-11-24 21:47:15,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:15,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321649533] [2023-11-24 21:47:15,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:15,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:15,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:15,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:15,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321649533] [2023-11-24 21:47:15,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321649533] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:47:15,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:47:15,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:47:15,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193217294] [2023-11-24 21:47:15,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:47:15,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:47:15,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:15,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:47:15,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:47:15,575 INFO L87 Difference]: Start difference. First operand has 18 states, 16 states have (on average 1.6875) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:15,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:15,771 INFO L93 Difference]: Finished difference Result 47 states and 67 transitions. [2023-11-24 21:47:15,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:47:15,774 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-24 21:47:15,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:15,781 INFO L225 Difference]: With dead ends: 47 [2023-11-24 21:47:15,781 INFO L226 Difference]: Without dead ends: 25 [2023-11-24 21:47:15,784 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:47:15,788 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 18 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:15,790 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 69 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:47:15,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-24 21:47:15,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 20. [2023-11-24 21:47:15,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:15,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 26 transitions. [2023-11-24 21:47:15,824 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 26 transitions. Word has length 8 [2023-11-24 21:47:15,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:15,825 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 26 transitions. [2023-11-24 21:47:15,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:15,826 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 26 transitions. [2023-11-24 21:47:15,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-24 21:47:15,827 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:15,827 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:15,827 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-24 21:47:15,828 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:15,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:15,829 INFO L85 PathProgramCache]: Analyzing trace with hash -97791536, now seen corresponding path program 1 times [2023-11-24 21:47:15,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:15,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301554957] [2023-11-24 21:47:15,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:15,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:15,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:15,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:15,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301554957] [2023-11-24 21:47:15,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [301554957] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:47:15,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:47:15,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:47:15,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145370101] [2023-11-24 21:47:15,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:47:15,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:47:15,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:15,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:47:15,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:47:15,919 INFO L87 Difference]: Start difference. First operand 20 states and 26 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:15,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:15,944 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2023-11-24 21:47:15,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:47:15,945 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-24 21:47:15,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:15,946 INFO L225 Difference]: With dead ends: 29 [2023-11-24 21:47:15,946 INFO L226 Difference]: Without dead ends: 22 [2023-11-24 21:47:15,946 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:47:15,948 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:15,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:47:15,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-24 21:47:15,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-24 21:47:15,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 21 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:15,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 28 transitions. [2023-11-24 21:47:15,957 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 28 transitions. Word has length 11 [2023-11-24 21:47:15,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:15,957 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 28 transitions. [2023-11-24 21:47:15,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:15,958 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 28 transitions. [2023-11-24 21:47:15,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-24 21:47:15,959 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:15,959 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:15,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-24 21:47:15,960 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:15,961 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:15,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1563678511, now seen corresponding path program 1 times [2023-11-24 21:47:15,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:15,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173414328] [2023-11-24 21:47:15,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:15,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:16,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:16,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:16,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173414328] [2023-11-24 21:47:16,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173414328] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:47:16,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:47:16,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-24 21:47:16,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431489757] [2023-11-24 21:47:16,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:47:16,039 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-24 21:47:16,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:16,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-24 21:47:16,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:47:16,040 INFO L87 Difference]: Start difference. First operand 22 states and 28 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:16,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:16,068 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2023-11-24 21:47:16,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-24 21:47:16,069 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-24 21:47:16,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:16,070 INFO L225 Difference]: With dead ends: 41 [2023-11-24 21:47:16,071 INFO L226 Difference]: Without dead ends: 23 [2023-11-24 21:47:16,071 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-24 21:47:16,073 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:16,074 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:47:16,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-24 21:47:16,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-24 21:47:16,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 22 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:16,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 29 transitions. [2023-11-24 21:47:16,081 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 29 transitions. Word has length 11 [2023-11-24 21:47:16,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:16,082 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 29 transitions. [2023-11-24 21:47:16,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:16,082 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 29 transitions. [2023-11-24 21:47:16,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 21:47:16,083 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:16,083 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:16,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-24 21:47:16,084 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:16,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:16,085 INFO L85 PathProgramCache]: Analyzing trace with hash 425171484, now seen corresponding path program 1 times [2023-11-24 21:47:16,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:16,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12305635] [2023-11-24 21:47:16,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:16,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:16,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:16,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:16,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:16,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12305635] [2023-11-24 21:47:16,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12305635] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:16,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482720191] [2023-11-24 21:47:16,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:16,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:16,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:16,168 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:16,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-24 21:47:16,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:16,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:47:16,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:16,622 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:47:16,622 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-24 21:47:16,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482720191] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:47:16,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-24 21:47:16,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 7 [2023-11-24 21:47:16,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936452941] [2023-11-24 21:47:16,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:47:16,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:47:16,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:16,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:47:16,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:47:16,626 INFO L87 Difference]: Start difference. First operand 23 states and 29 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:16,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:16,724 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2023-11-24 21:47:16,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:47:16,725 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-24 21:47:16,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:16,726 INFO L225 Difference]: With dead ends: 34 [2023-11-24 21:47:16,726 INFO L226 Difference]: Without dead ends: 24 [2023-11-24 21:47:16,727 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2023-11-24 21:47:16,729 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 8 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:16,729 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 32 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:47:16,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-24 21:47:16,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2023-11-24 21:47:16,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:16,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-11-24 21:47:16,736 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 12 [2023-11-24 21:47:16,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:16,736 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-11-24 21:47:16,737 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:16,737 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-11-24 21:47:16,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-24 21:47:16,738 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:16,738 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:16,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:16,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:16,945 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:16,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:16,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1704256970, now seen corresponding path program 1 times [2023-11-24 21:47:16,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:16,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508005046] [2023-11-24 21:47:16,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:16,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:17,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:17,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:17,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508005046] [2023-11-24 21:47:17,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508005046] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:17,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270910178] [2023-11-24 21:47:17,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:17,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:17,046 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:17,047 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:17,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-24 21:47:17,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:17,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 21:47:17,111 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:17,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:17,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:17,177 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:17,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1270910178] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:17,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:17,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-24 21:47:17,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711361213] [2023-11-24 21:47:17,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:17,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-24 21:47:17,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:17,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-24 21:47:17,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:47:17,184 INFO L87 Difference]: Start difference. First operand 23 states and 28 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:17,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:17,239 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-11-24 21:47:17,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-24 21:47:17,241 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-24 21:47:17,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:17,242 INFO L225 Difference]: With dead ends: 42 [2023-11-24 21:47:17,242 INFO L226 Difference]: Without dead ends: 24 [2023-11-24 21:47:17,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2023-11-24 21:47:17,246 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:17,247 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 38 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:47:17,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-24 21:47:17,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-24 21:47:17,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:17,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-11-24 21:47:17,259 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 12 [2023-11-24 21:47:17,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:17,260 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-11-24 21:47:17,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:17,260 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-11-24 21:47:17,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-24 21:47:17,262 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:17,262 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:17,270 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:17,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:17,469 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:17,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:17,470 INFO L85 PathProgramCache]: Analyzing trace with hash 68958223, now seen corresponding path program 2 times [2023-11-24 21:47:17,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:17,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291475332] [2023-11-24 21:47:17,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:17,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:17,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:17,656 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:47:17,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:17,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291475332] [2023-11-24 21:47:17,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291475332] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:47:17,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:47:17,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-24 21:47:17,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350923510] [2023-11-24 21:47:17,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:47:17,659 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-24 21:47:17,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:17,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-24 21:47:17,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2023-11-24 21:47:17,660 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:17,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:17,721 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2023-11-24 21:47:17,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-24 21:47:17,721 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-24 21:47:17,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:17,722 INFO L225 Difference]: With dead ends: 28 [2023-11-24 21:47:17,722 INFO L226 Difference]: Without dead ends: 24 [2023-11-24 21:47:17,723 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-24 21:47:17,724 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 20 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:17,724 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 15 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:47:17,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-24 21:47:17,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-24 21:47:17,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:17,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-24 21:47:17,732 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 13 [2023-11-24 21:47:17,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:17,733 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-24 21:47:17,733 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:17,733 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-24 21:47:17,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-24 21:47:17,734 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:17,734 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:17,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-24 21:47:17,735 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:17,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:17,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1654530356, now seen corresponding path program 1 times [2023-11-24 21:47:17,736 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:17,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256786454] [2023-11-24 21:47:17,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:17,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:17,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:17,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-24 21:47:17,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:17,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256786454] [2023-11-24 21:47:17,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256786454] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:17,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648842594] [2023-11-24 21:47:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:17,824 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:17,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:17,826 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:17,851 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-24 21:47:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:17,889 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-24 21:47:17,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:17,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:47:17,932 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:47:17,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648842594] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:17,963 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:17,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 10 [2023-11-24 21:47:17,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421400643] [2023-11-24 21:47:17,963 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:17,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-24 21:47:17,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:17,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-24 21:47:17,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:47:17,967 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:18,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:18,018 INFO L93 Difference]: Finished difference Result 40 states and 49 transitions. [2023-11-24 21:47:18,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-24 21:47:18,019 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-24 21:47:18,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:18,019 INFO L225 Difference]: With dead ends: 40 [2023-11-24 21:47:18,020 INFO L226 Difference]: Without dead ends: 28 [2023-11-24 21:47:18,020 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2023-11-24 21:47:18,021 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 2 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:18,022 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 24 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:47:18,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-24 21:47:18,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-24 21:47:18,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 27 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:18,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2023-11-24 21:47:18,038 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 17 [2023-11-24 21:47:18,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:18,039 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2023-11-24 21:47:18,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:18,040 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2023-11-24 21:47:18,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 21:47:18,041 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:18,041 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:18,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:18,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:18,247 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:18,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:18,248 INFO L85 PathProgramCache]: Analyzing trace with hash -831106316, now seen corresponding path program 1 times [2023-11-24 21:47:18,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:18,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804825382] [2023-11-24 21:47:18,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:18,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:18,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:18,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:47:18,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:18,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804825382] [2023-11-24 21:47:18,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804825382] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:18,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444825965] [2023-11-24 21:47:18,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:18,352 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:18,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:18,359 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:18,368 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-24 21:47:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:18,432 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-24 21:47:18,434 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:47:18,530 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:18,575 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2023-11-24 21:47:18,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444825965] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:18,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:18,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 11 [2023-11-24 21:47:18,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624853350] [2023-11-24 21:47:18,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:18,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-24 21:47:18,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:18,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-24 21:47:18,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:47:18,582 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:18,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:18,648 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2023-11-24 21:47:18,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-24 21:47:18,648 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-24 21:47:18,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:18,650 INFO L225 Difference]: With dead ends: 39 [2023-11-24 21:47:18,651 INFO L226 Difference]: Without dead ends: 34 [2023-11-24 21:47:18,651 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2023-11-24 21:47:18,653 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 1 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:18,653 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 43 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:47:18,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-24 21:47:18,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 29. [2023-11-24 21:47:18,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:18,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-11-24 21:47:18,668 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 18 [2023-11-24 21:47:18,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:18,668 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-11-24 21:47:18,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.1818181818181817) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:18,669 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-11-24 21:47:18,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-24 21:47:18,670 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:18,670 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:18,680 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:18,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:18,875 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:18,876 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:18,876 INFO L85 PathProgramCache]: Analyzing trace with hash -829259274, now seen corresponding path program 1 times [2023-11-24 21:47:18,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:18,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871429638] [2023-11-24 21:47:18,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:18,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:18,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2023-11-24 21:47:18,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:18,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871429638] [2023-11-24 21:47:18,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871429638] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-24 21:47:18,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-24 21:47:18,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-24 21:47:18,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764276212] [2023-11-24 21:47:18,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-24 21:47:18,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-24 21:47:18,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:18,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-24 21:47:18,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:47:18,981 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:19,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:19,010 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2023-11-24 21:47:19,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-24 21:47:19,010 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-24 21:47:19,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:19,011 INFO L225 Difference]: With dead ends: 35 [2023-11-24 21:47:19,011 INFO L226 Difference]: Without dead ends: 29 [2023-11-24 21:47:19,011 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-24 21:47:19,012 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:19,013 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 45 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-24 21:47:19,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-24 21:47:19,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-24 21:47:19,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1785714285714286) internal successors, (33), 28 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:19,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2023-11-24 21:47:19,022 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 18 [2023-11-24 21:47:19,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:19,022 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2023-11-24 21:47:19,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:19,023 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2023-11-24 21:47:19,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 21:47:19,023 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:19,023 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:19,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-24 21:47:19,024 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:19,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:19,024 INFO L85 PathProgramCache]: Analyzing trace with hash -777338956, now seen corresponding path program 2 times [2023-11-24 21:47:19,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:19,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [327540515] [2023-11-24 21:47:19,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:19,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:19,407 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:19,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:19,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [327540515] [2023-11-24 21:47:19,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [327540515] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:19,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930619676] [2023-11-24 21:47:19,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:47:19,408 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:19,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:19,409 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:19,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-24 21:47:19,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:47:19,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:47:19,477 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 21:47:19,479 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:19,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:19,909 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:20,233 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930619676] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:20,233 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:20,233 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2023-11-24 21:47:20,233 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524488686] [2023-11-24 21:47:20,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:20,234 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-24 21:47:20,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:20,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-24 21:47:20,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=433, Unknown=0, NotChecked=0, Total=552 [2023-11-24 21:47:20,236 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:20,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:20,521 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2023-11-24 21:47:20,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:47:20,522 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-24 21:47:20,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:20,522 INFO L225 Difference]: With dead ends: 42 [2023-11-24 21:47:20,522 INFO L226 Difference]: Without dead ends: 28 [2023-11-24 21:47:20,523 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2023-11-24 21:47:20,524 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 45 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 142 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 142 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:20,525 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 46 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 142 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:47:20,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-24 21:47:20,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2023-11-24 21:47:20,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:20,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-11-24 21:47:20,545 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 19 [2023-11-24 21:47:20,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:20,547 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-11-24 21:47:20,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5) internal successors, (36), 24 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:20,547 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-11-24 21:47:20,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-24 21:47:20,553 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:20,553 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:20,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:20,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-24 21:47:20,759 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:20,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:20,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1274990161, now seen corresponding path program 2 times [2023-11-24 21:47:20,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:20,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056814551] [2023-11-24 21:47:20,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:20,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:20,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:21,110 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:21,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:21,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056814551] [2023-11-24 21:47:21,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056814551] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:21,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637654575] [2023-11-24 21:47:21,111 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:47:21,112 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:21,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:21,113 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:21,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-24 21:47:21,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:47:21,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:47:21,177 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-24 21:47:21,179 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:21,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:21,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:21,810 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:21,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637654575] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:21,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:21,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2023-11-24 21:47:21,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049013812] [2023-11-24 21:47:21,813 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:21,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-24 21:47:21,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:21,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-24 21:47:21,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2023-11-24 21:47:21,815 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:22,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:22,053 INFO L93 Difference]: Finished difference Result 35 states and 38 transitions. [2023-11-24 21:47:22,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-24 21:47:22,054 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2023-11-24 21:47:22,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:22,055 INFO L225 Difference]: With dead ends: 35 [2023-11-24 21:47:22,055 INFO L226 Difference]: Without dead ends: 29 [2023-11-24 21:47:22,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 5 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 332 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=187, Invalid=625, Unknown=0, NotChecked=0, Total=812 [2023-11-24 21:47:22,057 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 68 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:22,057 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 28 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:47:22,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-24 21:47:22,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2023-11-24 21:47:22,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:22,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2023-11-24 21:47:22,079 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 19 [2023-11-24 21:47:22,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:22,081 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2023-11-24 21:47:22,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:22,082 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2023-11-24 21:47:22,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 21:47:22,082 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:22,083 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:22,096 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:22,288 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2023-11-24 21:47:22,288 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:22,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:22,289 INFO L85 PathProgramCache]: Analyzing trace with hash 31731131, now seen corresponding path program 3 times [2023-11-24 21:47:22,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:22,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343166582] [2023-11-24 21:47:22,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:22,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:22,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:22,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:22,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:22,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343166582] [2023-11-24 21:47:22,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343166582] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:22,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368884508] [2023-11-24 21:47:22,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:47:22,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:22,756 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:22,757 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:22,783 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-24 21:47:22,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-24 21:47:22,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:47:22,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-24 21:47:22,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:23,312 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:23,312 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:23,774 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:23,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368884508] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:23,775 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:23,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 31 [2023-11-24 21:47:23,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829062288] [2023-11-24 21:47:23,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:23,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2023-11-24 21:47:23,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:23,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2023-11-24 21:47:23,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2023-11-24 21:47:23,778 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:24,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:24,369 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2023-11-24 21:47:24,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-24 21:47:24,370 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-24 21:47:24,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:24,371 INFO L225 Difference]: With dead ends: 47 [2023-11-24 21:47:24,371 INFO L226 Difference]: Without dead ends: 32 [2023-11-24 21:47:24,372 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 6 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=306, Invalid=1254, Unknown=0, NotChecked=0, Total=1560 [2023-11-24 21:47:24,373 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 45 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:24,373 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 62 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:47:24,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-24 21:47:24,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2023-11-24 21:47:24,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 30 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:24,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2023-11-24 21:47:24,388 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 20 [2023-11-24 21:47:24,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:24,388 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2023-11-24 21:47:24,388 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.3548387096774193) internal successors, (42), 31 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:24,389 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2023-11-24 21:47:24,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2023-11-24 21:47:24,389 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:24,389 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:24,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:24,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-24 21:47:24,596 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:24,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:24,597 INFO L85 PathProgramCache]: Analyzing trace with hash -556921925, now seen corresponding path program 3 times [2023-11-24 21:47:24,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:24,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91444263] [2023-11-24 21:47:24,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:24,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:24,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:25,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:25,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91444263] [2023-11-24 21:47:25,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91444263] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:25,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748556121] [2023-11-24 21:47:25,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:47:25,064 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:25,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:25,066 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:25,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-24 21:47:25,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-24 21:47:25,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:47:25,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-24 21:47:25,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:25,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:25,940 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:25,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748556121] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:25,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:25,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 30 [2023-11-24 21:47:25,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042967196] [2023-11-24 21:47:25,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:25,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2023-11-24 21:47:25,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:25,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2023-11-24 21:47:25,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=700, Unknown=0, NotChecked=0, Total=870 [2023-11-24 21:47:25,943 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:26,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:26,333 INFO L93 Difference]: Finished difference Result 42 states and 47 transitions. [2023-11-24 21:47:26,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-24 21:47:26,334 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2023-11-24 21:47:26,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:26,334 INFO L225 Difference]: With dead ends: 42 [2023-11-24 21:47:26,334 INFO L226 Difference]: Without dead ends: 36 [2023-11-24 21:47:26,335 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 18 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=302, Invalid=1180, Unknown=0, NotChecked=0, Total=1482 [2023-11-24 21:47:26,336 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 74 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:26,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 50 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:47:26,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2023-11-24 21:47:26,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2023-11-24 21:47:26,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:26,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-11-24 21:47:26,351 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 20 [2023-11-24 21:47:26,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:26,352 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-11-24 21:47:26,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 30 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:26,352 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-11-24 21:47:26,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-24 21:47:26,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:26,353 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:26,364 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:26,559 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-24 21:47:26,560 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:26,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:26,560 INFO L85 PathProgramCache]: Analyzing trace with hash -867557427, now seen corresponding path program 4 times [2023-11-24 21:47:26,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:26,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929299379] [2023-11-24 21:47:26,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:26,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:27,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:27,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:27,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929299379] [2023-11-24 21:47:27,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929299379] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:27,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224268343] [2023-11-24 21:47:27,020 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:47:27,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:27,020 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:27,021 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:27,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-24 21:47:27,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:47:27,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:47:27,088 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-24 21:47:27,090 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:27,487 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:27,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:27,820 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:27,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224268343] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:27,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:27,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2023-11-24 21:47:27,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588304084] [2023-11-24 21:47:27,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:27,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-24 21:47:27,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:27,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-24 21:47:27,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=644, Unknown=0, NotChecked=0, Total=812 [2023-11-24 21:47:27,823 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:28,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:28,091 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2023-11-24 21:47:28,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 21:47:28,092 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-24 21:47:28,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:28,092 INFO L225 Difference]: With dead ends: 46 [2023-11-24 21:47:28,092 INFO L226 Difference]: Without dead ends: 31 [2023-11-24 21:47:28,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=254, Invalid=936, Unknown=0, NotChecked=0, Total=1190 [2023-11-24 21:47:28,094 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 32 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:28,094 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 34 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 122 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:47:28,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-24 21:47:28,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-24 21:47:28,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:28,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2023-11-24 21:47:28,114 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 21 [2023-11-24 21:47:28,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:28,114 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2023-11-24 21:47:28,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4137931034482758) internal successors, (41), 29 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:28,115 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2023-11-24 21:47:28,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-24 21:47:28,117 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:28,118 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:28,133 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:28,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:28,324 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:28,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:28,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1725275500, now seen corresponding path program 4 times [2023-11-24 21:47:28,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:28,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459203107] [2023-11-24 21:47:28,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:28,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:28,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:28,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459203107] [2023-11-24 21:47:28,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459203107] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:28,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059846246] [2023-11-24 21:47:28,741 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:47:28,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:28,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:28,742 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:28,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-24 21:47:28,810 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:47:28,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:47:28,811 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-24 21:47:28,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:29,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:29,555 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:29,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059846246] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:29,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:29,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 29 [2023-11-24 21:47:29,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767361188] [2023-11-24 21:47:29,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:29,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-24 21:47:29,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:29,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-24 21:47:29,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=641, Unknown=0, NotChecked=0, Total=812 [2023-11-24 21:47:29,560 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:29,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:29,798 INFO L93 Difference]: Finished difference Result 38 states and 41 transitions. [2023-11-24 21:47:29,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-24 21:47:29,799 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2023-11-24 21:47:29,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:29,800 INFO L225 Difference]: With dead ends: 38 [2023-11-24 21:47:29,800 INFO L226 Difference]: Without dead ends: 32 [2023-11-24 21:47:29,800 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 6 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=265, Invalid=925, Unknown=0, NotChecked=0, Total=1190 [2023-11-24 21:47:29,801 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 67 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:29,801 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [67 Valid, 31 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:47:29,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-24 21:47:29,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-24 21:47:29,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:29,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2023-11-24 21:47:29,817 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 21 [2023-11-24 21:47:29,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:29,817 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2023-11-24 21:47:29,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:29,818 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2023-11-24 21:47:29,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 21:47:29,820 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:29,820 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:29,827 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:30,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:30,026 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:30,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:30,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1512776152, now seen corresponding path program 5 times [2023-11-24 21:47:30,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:30,027 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169363088] [2023-11-24 21:47:30,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:30,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:30,523 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:30,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:30,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169363088] [2023-11-24 21:47:30,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169363088] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:30,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392816554] [2023-11-24 21:47:30,524 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 21:47:30,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:30,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:30,526 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:30,555 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-24 21:47:30,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-24 21:47:30,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:47:30,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-24 21:47:30,593 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:31,132 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:31,132 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:31,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392816554] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:31,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:31,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 36 [2023-11-24 21:47:31,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254361167] [2023-11-24 21:47:31,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:31,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-24 21:47:31,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:31,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-24 21:47:31,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=1027, Unknown=0, NotChecked=0, Total=1260 [2023-11-24 21:47:31,646 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand has 36 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 36 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:32,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:32,156 INFO L93 Difference]: Finished difference Result 51 states and 57 transitions. [2023-11-24 21:47:32,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-24 21:47:32,157 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 36 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-24 21:47:32,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:32,157 INFO L225 Difference]: With dead ends: 51 [2023-11-24 21:47:32,157 INFO L226 Difference]: Without dead ends: 35 [2023-11-24 21:47:32,159 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 7 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 889 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=396, Invalid=1674, Unknown=0, NotChecked=0, Total=2070 [2023-11-24 21:47:32,160 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 42 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:32,160 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 47 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:47:32,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-24 21:47:32,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2023-11-24 21:47:32,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 33 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:32,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 38 transitions. [2023-11-24 21:47:32,172 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 38 transitions. Word has length 22 [2023-11-24 21:47:32,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:32,172 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 38 transitions. [2023-11-24 21:47:32,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3055555555555556) internal successors, (47), 36 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:32,173 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 38 transitions. [2023-11-24 21:47:32,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-24 21:47:32,173 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:32,173 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:32,191 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:32,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-24 21:47:32,388 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:32,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:32,389 INFO L85 PathProgramCache]: Analyzing trace with hash 499811860, now seen corresponding path program 5 times [2023-11-24 21:47:32,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:32,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198017459] [2023-11-24 21:47:32,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:32,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:32,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:32,867 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:32,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:32,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198017459] [2023-11-24 21:47:32,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198017459] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:32,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668117728] [2023-11-24 21:47:32,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 21:47:32,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:32,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:32,870 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:32,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-24 21:47:32,924 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-24 21:47:32,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:47:32,925 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-24 21:47:32,927 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:33,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:33,429 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:33,888 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:33,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668117728] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:33,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:33,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 35 [2023-11-24 21:47:33,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260652060] [2023-11-24 21:47:33,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:33,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-24 21:47:33,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:33,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-24 21:47:33,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=962, Unknown=0, NotChecked=0, Total=1190 [2023-11-24 21:47:33,892 INFO L87 Difference]: Start difference. First operand 34 states and 38 transitions. Second operand has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:34,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:34,294 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2023-11-24 21:47:34,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-24 21:47:34,294 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2023-11-24 21:47:34,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:34,295 INFO L225 Difference]: With dead ends: 45 [2023-11-24 21:47:34,295 INFO L226 Difference]: Without dead ends: 39 [2023-11-24 21:47:34,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 7 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=396, Invalid=1584, Unknown=0, NotChecked=0, Total=1980 [2023-11-24 21:47:34,296 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 52 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 221 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:34,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 54 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 221 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:47:34,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-24 21:47:34,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2023-11-24 21:47:34,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1470588235294117) internal successors, (39), 34 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:34,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2023-11-24 21:47:34,313 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 22 [2023-11-24 21:47:34,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:34,313 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2023-11-24 21:47:34,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:34,314 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2023-11-24 21:47:34,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-24 21:47:34,314 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:34,314 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:34,320 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:34,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:34,519 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:34,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:34,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1826418836, now seen corresponding path program 6 times [2023-11-24 21:47:34,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:34,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892694755] [2023-11-24 21:47:34,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:34,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:34,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:34,930 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:34,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:34,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892694755] [2023-11-24 21:47:34,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [892694755] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:34,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322424991] [2023-11-24 21:47:34,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-24 21:47:34,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:34,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:34,932 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:34,935 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-24 21:47:34,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-24 21:47:34,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:47:34,990 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-24 21:47:34,992 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:35,461 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:35,462 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:35,857 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:35,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322424991] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:35,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:35,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2023-11-24 21:47:35,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286781817] [2023-11-24 21:47:35,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:35,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-24 21:47:35,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:35,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-24 21:47:35,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2023-11-24 21:47:35,860 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:36,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:36,189 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2023-11-24 21:47:36,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-24 21:47:36,189 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-24 21:47:36,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:36,190 INFO L225 Difference]: With dead ends: 50 [2023-11-24 21:47:36,190 INFO L226 Difference]: Without dead ends: 34 [2023-11-24 21:47:36,191 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=342, Invalid=1298, Unknown=0, NotChecked=0, Total=1640 [2023-11-24 21:47:36,192 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 34 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 209 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:36,193 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 209 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:47:36,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2023-11-24 21:47:36,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2023-11-24 21:47:36,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:36,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2023-11-24 21:47:36,211 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 23 [2023-11-24 21:47:36,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:36,211 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2023-11-24 21:47:36,211 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3529411764705883) internal successors, (46), 34 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:36,212 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2023-11-24 21:47:36,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-24 21:47:36,212 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:36,212 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:36,224 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:36,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:36,424 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:36,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:36,424 INFO L85 PathProgramCache]: Analyzing trace with hash 951551089, now seen corresponding path program 6 times [2023-11-24 21:47:36,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:36,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343124761] [2023-11-24 21:47:36,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:36,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:36,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:36,884 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:36,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:36,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343124761] [2023-11-24 21:47:36,884 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343124761] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:36,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387818507] [2023-11-24 21:47:36,885 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-24 21:47:36,885 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:36,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:36,886 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:36,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-24 21:47:36,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-24 21:47:36,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:47:36,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-24 21:47:36,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:37,401 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:37,401 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:37,796 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:37,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387818507] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:37,797 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:37,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 34 [2023-11-24 21:47:37,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363750878] [2023-11-24 21:47:37,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:37,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-24 21:47:37,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:37,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-24 21:47:37,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2023-11-24 21:47:37,800 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:38,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:38,103 INFO L93 Difference]: Finished difference Result 41 states and 44 transitions. [2023-11-24 21:47:38,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-24 21:47:38,104 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-24 21:47:38,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:38,104 INFO L225 Difference]: With dead ends: 41 [2023-11-24 21:47:38,104 INFO L226 Difference]: Without dead ends: 35 [2023-11-24 21:47:38,105 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 7 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=357, Invalid=1283, Unknown=0, NotChecked=0, Total=1640 [2023-11-24 21:47:38,106 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 64 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 212 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 214 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:38,106 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 47 Invalid, 214 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 212 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:47:38,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-24 21:47:38,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-24 21:47:38,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:38,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2023-11-24 21:47:38,120 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 23 [2023-11-24 21:47:38,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:38,120 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2023-11-24 21:47:38,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:38,121 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2023-11-24 21:47:38,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-24 21:47:38,121 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:38,121 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:38,132 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:38,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:38,327 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:38,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:38,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1404945509, now seen corresponding path program 7 times [2023-11-24 21:47:38,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:38,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954770569] [2023-11-24 21:47:38,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:38,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:38,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:38,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:38,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954770569] [2023-11-24 21:47:38,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954770569] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:38,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585231108] [2023-11-24 21:47:38,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-24 21:47:38,867 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:38,867 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:38,868 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:38,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-24 21:47:38,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:38,933 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-24 21:47:38,934 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:39,549 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:39,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:40,058 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:40,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585231108] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:40,058 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:40,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 41 [2023-11-24 21:47:40,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817800271] [2023-11-24 21:47:40,059 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:40,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-24 21:47:40,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:40,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-24 21:47:40,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1341, Unknown=0, NotChecked=0, Total=1640 [2023-11-24 21:47:40,061 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 41 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:40,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:40,577 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2023-11-24 21:47:40,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-24 21:47:40,578 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-24 21:47:40,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:40,578 INFO L225 Difference]: With dead ends: 55 [2023-11-24 21:47:40,578 INFO L226 Difference]: Without dead ends: 38 [2023-11-24 21:47:40,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 16 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=500, Invalid=2152, Unknown=0, NotChecked=0, Total=2652 [2023-11-24 21:47:40,581 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 43 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 198 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:40,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 44 Invalid, 198 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:47:40,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-24 21:47:40,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2023-11-24 21:47:40,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1388888888888888) internal successors, (41), 36 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:40,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2023-11-24 21:47:40,596 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 24 [2023-11-24 21:47:40,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:40,596 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2023-11-24 21:47:40,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:40,596 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2023-11-24 21:47:40,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-24 21:47:40,597 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:40,597 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:40,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-24 21:47:40,802 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:40,803 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:40,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:40,804 INFO L85 PathProgramCache]: Analyzing trace with hash 1608311067, now seen corresponding path program 7 times [2023-11-24 21:47:40,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:40,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135355367] [2023-11-24 21:47:40,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:40,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:40,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:41,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:41,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135355367] [2023-11-24 21:47:41,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135355367] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:41,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360272090] [2023-11-24 21:47:41,315 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-24 21:47:41,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:41,315 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:41,316 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:41,335 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-24 21:47:41,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:41,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-24 21:47:41,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:41,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:42,298 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:42,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360272090] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:42,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:42,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 40 [2023-11-24 21:47:42,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168211641] [2023-11-24 21:47:42,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:42,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-24 21:47:42,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:42,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-24 21:47:42,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=295, Invalid=1265, Unknown=0, NotChecked=0, Total=1560 [2023-11-24 21:47:42,301 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand has 40 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:42,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:42,685 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2023-11-24 21:47:42,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-24 21:47:42,687 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2023-11-24 21:47:42,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:42,687 INFO L225 Difference]: With dead ends: 48 [2023-11-24 21:47:42,688 INFO L226 Difference]: Without dead ends: 42 [2023-11-24 21:47:42,689 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 8 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1155 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=504, Invalid=2046, Unknown=0, NotChecked=0, Total=2550 [2023-11-24 21:47:42,690 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 54 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 233 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:42,690 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 42 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 233 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:47:42,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-24 21:47:42,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2023-11-24 21:47:42,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:42,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2023-11-24 21:47:42,704 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 24 [2023-11-24 21:47:42,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:42,705 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2023-11-24 21:47:42,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.3) internal successors, (52), 40 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:42,705 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2023-11-24 21:47:42,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-24 21:47:42,705 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:42,705 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:42,711 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:42,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:42,911 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:42,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:42,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1830155885, now seen corresponding path program 8 times [2023-11-24 21:47:42,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:42,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936944510] [2023-11-24 21:47:42,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:42,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 16 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:43,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:43,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936944510] [2023-11-24 21:47:43,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [936944510] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:43,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036622120] [2023-11-24 21:47:43,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:47:43,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:43,361 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:43,362 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:43,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-24 21:47:43,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:47:43,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:47:43,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-24 21:47:43,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:43,893 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:43,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:44,326 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:44,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036622120] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:44,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:44,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 39 [2023-11-24 21:47:44,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307189421] [2023-11-24 21:47:44,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:44,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-24 21:47:44,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:44,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-24 21:47:44,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1189, Unknown=0, NotChecked=0, Total=1482 [2023-11-24 21:47:44,329 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 39 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:44,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:44,666 INFO L93 Difference]: Finished difference Result 54 states and 58 transitions. [2023-11-24 21:47:44,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-24 21:47:44,669 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-24 21:47:44,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:44,669 INFO L225 Difference]: With dead ends: 54 [2023-11-24 21:47:44,669 INFO L226 Difference]: Without dead ends: 37 [2023-11-24 21:47:44,670 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1059 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=444, Invalid=1718, Unknown=0, NotChecked=0, Total=2162 [2023-11-24 21:47:44,671 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:44,671 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 51 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:47:44,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-24 21:47:44,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2023-11-24 21:47:44,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:44,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2023-11-24 21:47:44,684 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 25 [2023-11-24 21:47:44,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:44,684 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2023-11-24 21:47:44,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.3076923076923077) internal successors, (51), 39 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:44,684 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2023-11-24 21:47:44,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-24 21:47:44,685 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:44,685 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:44,690 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:44,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:44,885 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:44,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:44,886 INFO L85 PathProgramCache]: Analyzing trace with hash 423648244, now seen corresponding path program 8 times [2023-11-24 21:47:44,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:44,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969161783] [2023-11-24 21:47:44,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:44,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:44,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:45,403 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 10 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:45,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:45,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969161783] [2023-11-24 21:47:45,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969161783] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:45,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533958915] [2023-11-24 21:47:45,403 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-24 21:47:45,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:45,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:45,404 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:45,407 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-24 21:47:45,452 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-24 21:47:45,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:47:45,454 INFO L262 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-24 21:47:45,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:45,925 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:45,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:46,353 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:46,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [533958915] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:46,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:46,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 39 [2023-11-24 21:47:46,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674849206] [2023-11-24 21:47:46,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:46,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2023-11-24 21:47:46,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:46,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2023-11-24 21:47:46,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=1184, Unknown=0, NotChecked=0, Total=1482 [2023-11-24 21:47:46,357 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand has 39 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:46,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:46,651 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2023-11-24 21:47:46,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-24 21:47:46,651 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-24 21:47:46,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:46,652 INFO L225 Difference]: With dead ends: 44 [2023-11-24 21:47:46,652 INFO L226 Difference]: Without dead ends: 38 [2023-11-24 21:47:46,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 8 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1064 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=463, Invalid=1699, Unknown=0, NotChecked=0, Total=2162 [2023-11-24 21:47:46,654 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 107 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:46,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 37 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:47:46,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-24 21:47:46,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2023-11-24 21:47:46,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:46,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2023-11-24 21:47:46,668 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 25 [2023-11-24 21:47:46,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:46,668 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2023-11-24 21:47:46,668 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 39 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:46,668 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2023-11-24 21:47:46,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-24 21:47:46,668 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:46,669 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:46,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:46,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-24 21:47:46,869 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:46,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:46,870 INFO L85 PathProgramCache]: Analyzing trace with hash -590064520, now seen corresponding path program 9 times [2023-11-24 21:47:46,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:46,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089263120] [2023-11-24 21:47:46,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:46,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:47,459 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:47,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:47,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089263120] [2023-11-24 21:47:47,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089263120] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:47,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550036326] [2023-11-24 21:47:47,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:47:47,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:47,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:47,461 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:47,487 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-24 21:47:47,523 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-24 21:47:47,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:47:47,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-24 21:47:47,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:48,184 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:48,185 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:48,766 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:48,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550036326] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:48,766 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:48,766 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 46 [2023-11-24 21:47:48,766 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61458832] [2023-11-24 21:47:48,766 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:48,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-24 21:47:48,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:48,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-24 21:47:48,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=1696, Unknown=0, NotChecked=0, Total=2070 [2023-11-24 21:47:48,769 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand has 46 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:49,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:49,297 INFO L93 Difference]: Finished difference Result 59 states and 65 transitions. [2023-11-24 21:47:49,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-24 21:47:49,298 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-24 21:47:49,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:49,298 INFO L225 Difference]: With dead ends: 59 [2023-11-24 21:47:49,298 INFO L226 Difference]: Without dead ends: 41 [2023-11-24 21:47:49,300 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 16 SyntacticMatches, 10 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1579 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=618, Invalid=2688, Unknown=0, NotChecked=0, Total=3306 [2023-11-24 21:47:49,301 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 51 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:49,301 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 46 Invalid, 226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:47:49,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-24 21:47:49,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2023-11-24 21:47:49,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1282051282051282) internal successors, (44), 39 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:49,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2023-11-24 21:47:49,318 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 26 [2023-11-24 21:47:49,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:49,318 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2023-11-24 21:47:49,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:49,319 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2023-11-24 21:47:49,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-24 21:47:49,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:49,319 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:49,328 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:49,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-24 21:47:49,520 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:49,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:49,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1612979916, now seen corresponding path program 9 times [2023-11-24 21:47:49,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:49,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432764457] [2023-11-24 21:47:49,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:49,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:49,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:50,118 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:50,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:50,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432764457] [2023-11-24 21:47:50,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432764457] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:50,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632214338] [2023-11-24 21:47:50,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-24 21:47:50,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:50,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:50,124 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:50,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-24 21:47:50,188 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-24 21:47:50,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:47:50,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-24 21:47:50,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:50,756 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:50,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:51,294 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:51,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632214338] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:51,295 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:51,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 45 [2023-11-24 21:47:51,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468173038] [2023-11-24 21:47:51,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:51,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-24 21:47:51,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:51,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-24 21:47:51,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=1609, Unknown=0, NotChecked=0, Total=1980 [2023-11-24 21:47:51,300 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 45 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:51,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:51,692 INFO L93 Difference]: Finished difference Result 51 states and 56 transitions. [2023-11-24 21:47:51,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-24 21:47:51,693 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-24 21:47:51,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:51,694 INFO L225 Difference]: With dead ends: 51 [2023-11-24 21:47:51,694 INFO L226 Difference]: Without dead ends: 45 [2023-11-24 21:47:51,695 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 18 SyntacticMatches, 9 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=626, Invalid=2566, Unknown=0, NotChecked=0, Total=3192 [2023-11-24 21:47:51,696 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 88 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:51,696 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 38 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:47:51,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-24 21:47:51,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 41. [2023-11-24 21:47:51,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.125) internal successors, (45), 40 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:51,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2023-11-24 21:47:51,710 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 26 [2023-11-24 21:47:51,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:51,710 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2023-11-24 21:47:51,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.2666666666666666) internal successors, (57), 45 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:51,710 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2023-11-24 21:47:51,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-24 21:47:51,711 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:51,711 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:51,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:51,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-24 21:47:51,912 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:51,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:51,912 INFO L85 PathProgramCache]: Analyzing trace with hash 754383220, now seen corresponding path program 10 times [2023-11-24 21:47:51,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:51,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997491125] [2023-11-24 21:47:51,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:51,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:52,453 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:52,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:52,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997491125] [2023-11-24 21:47:52,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [997491125] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:52,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636651354] [2023-11-24 21:47:52,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:47:52,454 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:52,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:52,455 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:52,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-24 21:47:52,509 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:47:52,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:47:52,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-24 21:47:52,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:53,077 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:53,077 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:53,570 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:53,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636651354] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:53,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:53,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 44 [2023-11-24 21:47:53,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659253927] [2023-11-24 21:47:53,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:53,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-24 21:47:53,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:53,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-24 21:47:53,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=369, Invalid=1523, Unknown=0, NotChecked=0, Total=1892 [2023-11-24 21:47:53,573 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand has 44 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 44 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:53,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:53,930 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2023-11-24 21:47:53,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-24 21:47:53,931 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 44 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-24 21:47:53,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:53,932 INFO L225 Difference]: With dead ends: 58 [2023-11-24 21:47:53,932 INFO L226 Difference]: Without dead ends: 40 [2023-11-24 21:47:53,934 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=560, Invalid=2196, Unknown=0, NotChecked=0, Total=2756 [2023-11-24 21:47:53,934 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 29 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:53,936 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 56 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:47:53,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-24 21:47:53,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-24 21:47:53,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:53,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2023-11-24 21:47:53,950 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 27 [2023-11-24 21:47:53,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:53,950 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2023-11-24 21:47:53,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.2727272727272727) internal successors, (56), 44 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:53,951 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2023-11-24 21:47:53,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-24 21:47:53,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:53,951 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:53,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:54,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-24 21:47:54,157 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:54,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:54,157 INFO L85 PathProgramCache]: Analyzing trace with hash 46908049, now seen corresponding path program 10 times [2023-11-24 21:47:54,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:54,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154992099] [2023-11-24 21:47:54,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:54,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:54,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:54,729 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 15 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:54,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:54,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154992099] [2023-11-24 21:47:54,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154992099] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:54,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443056306] [2023-11-24 21:47:54,730 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-24 21:47:54,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:54,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:54,731 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:54,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-24 21:47:54,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-24 21:47:54,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:47:54,777 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-24 21:47:54,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 21 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:55,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:55,791 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:55,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1443056306] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:55,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:55,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 44 [2023-11-24 21:47:55,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61931875] [2023-11-24 21:47:55,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:55,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-24 21:47:55,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:55,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-24 21:47:55,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1517, Unknown=0, NotChecked=0, Total=1892 [2023-11-24 21:47:55,794 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 44 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:56,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:56,094 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2023-11-24 21:47:56,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-24 21:47:56,095 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-24 21:47:56,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:56,095 INFO L225 Difference]: With dead ends: 47 [2023-11-24 21:47:56,095 INFO L226 Difference]: Without dead ends: 41 [2023-11-24 21:47:56,097 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 21 SyntacticMatches, 9 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1398 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=583, Invalid=2173, Unknown=0, NotChecked=0, Total=2756 [2023-11-24 21:47:56,097 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 74 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 162 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:56,097 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 26 Invalid, 162 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-24 21:47:56,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-24 21:47:56,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2023-11-24 21:47:56,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:56,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2023-11-24 21:47:56,113 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 27 [2023-11-24 21:47:56,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:56,113 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2023-11-24 21:47:56,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.2954545454545454) internal successors, (57), 44 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:56,114 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2023-11-24 21:47:56,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-24 21:47:56,114 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:56,114 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:56,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:56,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-24 21:47:56,320 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:56,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:56,321 INFO L85 PathProgramCache]: Analyzing trace with hash 615891323, now seen corresponding path program 11 times [2023-11-24 21:47:56,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:56,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136499160] [2023-11-24 21:47:56,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:56,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:56,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:56,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:56,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136499160] [2023-11-24 21:47:56,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136499160] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:56,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253309049] [2023-11-24 21:47:56,904 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 21:47:56,904 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:56,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:56,904 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:56,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-24 21:47:56,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-24 21:47:56,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:47:56,961 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-24 21:47:56,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:47:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:57,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:47:58,292 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:58,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253309049] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:47:58,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:47:58,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 51 [2023-11-24 21:47:58,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283608906] [2023-11-24 21:47:58,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:47:58,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2023-11-24 21:47:58,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:47:58,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2023-11-24 21:47:58,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=2092, Unknown=0, NotChecked=0, Total=2550 [2023-11-24 21:47:58,295 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 51 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:58,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:47:58,902 INFO L93 Difference]: Finished difference Result 63 states and 69 transitions. [2023-11-24 21:47:58,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-24 21:47:58,903 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-24 21:47:58,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:47:58,903 INFO L225 Difference]: With dead ends: 63 [2023-11-24 21:47:58,903 INFO L226 Difference]: Without dead ends: 44 [2023-11-24 21:47:58,904 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 17 SyntacticMatches, 10 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1957 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=750, Invalid=3282, Unknown=0, NotChecked=0, Total=4032 [2023-11-24 21:47:58,905 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 34 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 271 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:47:58,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 52 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 271 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:47:58,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-24 21:47:58,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2023-11-24 21:47:58,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.119047619047619) internal successors, (47), 42 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:58,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2023-11-24 21:47:58,929 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 28 [2023-11-24 21:47:58,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:47:58,929 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2023-11-24 21:47:58,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.2156862745098038) internal successors, (62), 51 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:47:58,929 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2023-11-24 21:47:58,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-24 21:47:58,930 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:47:58,930 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:47:58,943 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2023-11-24 21:47:59,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-24 21:47:59,138 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:47:59,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:47:59,139 INFO L85 PathProgramCache]: Analyzing trace with hash -974303621, now seen corresponding path program 11 times [2023-11-24 21:47:59,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:47:59,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044997371] [2023-11-24 21:47:59,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:47:59,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:47:59,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:47:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 21 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:47:59,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:47:59,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044997371] [2023-11-24 21:47:59,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044997371] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:47:59,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751079977] [2023-11-24 21:47:59,800 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-24 21:47:59,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:47:59,800 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:47:59,801 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:47:59,803 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-24 21:47:59,847 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-24 21:47:59,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:47:59,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-24 21:47:59,849 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:48:00,480 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:00,480 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:48:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:01,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751079977] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:48:01,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:48:01,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 50 [2023-11-24 21:48:01,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864686908] [2023-11-24 21:48:01,051 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:48:01,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2023-11-24 21:48:01,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:01,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2023-11-24 21:48:01,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=456, Invalid=1994, Unknown=0, NotChecked=0, Total=2450 [2023-11-24 21:48:01,053 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand has 50 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:01,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:01,512 INFO L93 Difference]: Finished difference Result 54 states and 59 transitions. [2023-11-24 21:48:01,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-24 21:48:01,512 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-24 21:48:01,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:01,513 INFO L225 Difference]: With dead ends: 54 [2023-11-24 21:48:01,513 INFO L226 Difference]: Without dead ends: 48 [2023-11-24 21:48:01,514 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 18 SyntacticMatches, 10 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=762, Invalid=3144, Unknown=0, NotChecked=0, Total=3906 [2023-11-24 21:48:01,514 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 63 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:01,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 50 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:48:01,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-24 21:48:01,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2023-11-24 21:48:01,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.1162790697674418) internal successors, (48), 43 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:01,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2023-11-24 21:48:01,536 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 28 [2023-11-24 21:48:01,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:01,537 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2023-11-24 21:48:01,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.24) internal successors, (62), 50 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:01,537 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2023-11-24 21:48:01,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 21:48:01,537 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:01,537 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:01,542 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2023-11-24 21:48:01,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-24 21:48:01,738 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:48:01,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:01,738 INFO L85 PathProgramCache]: Analyzing trace with hash -921488115, now seen corresponding path program 12 times [2023-11-24 21:48:01,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:01,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893342473] [2023-11-24 21:48:01,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:01,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:01,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:02,369 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:02,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:02,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893342473] [2023-11-24 21:48:02,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893342473] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:48:02,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393510434] [2023-11-24 21:48:02,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-24 21:48:02,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:48:02,370 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:48:02,371 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:48:02,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-24 21:48:02,421 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-24 21:48:02,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:48:02,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-24 21:48:02,423 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-24 21:48:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:03,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-24 21:48:03,651 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:03,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393510434] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-24 21:48:03,651 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-24 21:48:03,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 49 [2023-11-24 21:48:03,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917276763] [2023-11-24 21:48:03,652 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-24 21:48:03,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2023-11-24 21:48:03,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-24 21:48:03,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2023-11-24 21:48:03,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=454, Invalid=1898, Unknown=0, NotChecked=0, Total=2352 [2023-11-24 21:48:03,653 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:04,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-24 21:48:04,068 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2023-11-24 21:48:04,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-24 21:48:04,068 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-24 21:48:04,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-24 21:48:04,069 INFO L225 Difference]: With dead ends: 62 [2023-11-24 21:48:04,069 INFO L226 Difference]: Without dead ends: 43 [2023-11-24 21:48:04,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 9 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1745 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=690, Invalid=2732, Unknown=0, NotChecked=0, Total=3422 [2023-11-24 21:48:04,070 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 24 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-24 21:48:04,071 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 77 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-24 21:48:04,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-24 21:48:04,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-11-24 21:48:04,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:04,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2023-11-24 21:48:04,096 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 29 [2023-11-24 21:48:04,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-24 21:48:04,096 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2023-11-24 21:48:04,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.2448979591836735) internal successors, (61), 49 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-24 21:48:04,097 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2023-11-24 21:48:04,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-24 21:48:04,097 INFO L187 NwaCegarLoop]: Found error trace [2023-11-24 21:48:04,097 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-24 21:48:04,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2023-11-24 21:48:04,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:48:04,303 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-24 21:48:04,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-24 21:48:04,303 INFO L85 PathProgramCache]: Analyzing trace with hash -1433793196, now seen corresponding path program 12 times [2023-11-24 21:48:04,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-24 21:48:04,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548454418] [2023-11-24 21:48:04,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-24 21:48:04,305 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-24 21:48:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-24 21:48:04,943 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-24 21:48:04,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-24 21:48:04,943 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548454418] [2023-11-24 21:48:04,943 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548454418] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-24 21:48:04,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867911123] [2023-11-24 21:48:04,944 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-24 21:48:04,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-24 21:48:04,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 [2023-11-24 21:48:04,945 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-24 21:48:04,948 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a9cfa883-0814-4b48-bf89-afcee0f3d06d/bin/uautomizer-verify-NlZe1sFDwI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-24 21:48:04,993 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-24 21:48:04,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-24 21:48:04,995 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-24 21:48:04,996 INFO L285 TraceCheckSpWp]: Computing forward predicates...